From jaguirre at sas.upenn.edu  Sun Jul  3 14:11:39 2022
From: jaguirre at sas.upenn.edu (Aguirre, James)
Date: Sun, 3 Jul 2022 19:11:39 +0000
Subject: [Soc21cm] 21cm Systematics Workshop Madison 31Aug/1Sept
Message-ID: <BLAPR10MB48176869462B4D40D0D7E5379ABF9@BLAPR10MB4817.namprd10.prod.outlook.com>

I am interested in attending the conference.  An abstract for a presentation is below.  Because of the start of classes, I am unable to attend in person on Thursday, September 1, but could attend in-person on either Wednesday or Friday (for the full day).  Virtually, I am only limited by teaching 1:45 - 3:15 on the 1st.

Validation of Software Pipelines: the HERA Experience

The extraction of the desired signal from 21 cm cosmology experiments faces steep challenges: the combined issues of data size, weak signal, strong foregrounds, and complex instruments couple with sophisticated, constantly-evolving, multi-step software pipelines developed by large groups to produce a situation which undermines confidence in the final analysis.  The challenges of producing robust scientific results from complicated instrumentation and analysis are of course not unique to 21 cm cosmology, and many strategies have been developed for these purposes, the most important for our purposes being end-to-end simulations of the instrument, its systematics, and all expected signals, processed with a high degree of realism through the entire analysis chain, for which I will term "validation" as shorthand.  The possibility of confirmation bias argues for having the validation effort be independent of the data analysis team.  I will take as an example the HERA validation effort, which was developed rather late in the instrument and analysis process, and describe how we interface with the analysis pipeline group, including adequately understanding and simulating systematic effects,  and the instrument builders and their measurements and simulations (antenna response, instrument noise, bandpass) to produce a validation of the HERA pipeline. Specific and unexpected concerns which arose as part of this process, and potential lessons for other groups will be discussed.

James Aguirre
Associate Professor
Department of Physics and Astronomy
University of Pennsylvania
David Rittenhouse Laboratory 4N4b
209 South 33rd Street Philadelphia, PA 19104
(215) 898-9596 (office)
(215) 898-9646 (lab)
jaguirre at sas.upenn.edu<mailto:jaguirre at sas.upenn.edu>
http://www.sas.upenn.edu/~jaguirre/
https://calendly.com/jaguirre-upenn/30min

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From ansari at lal.in2p3.fr  Tue Jul  5 17:27:40 2022
From: ansari at lal.in2p3.fr (=?utf-8?Q?R=C3=A9za_Ansari?=)
Date: Wed, 6 Jul 2022 00:27:40 +0200
Subject: [Soc21cm] F Mertens / LOFAR
References: <da0b69a5-74d0-cc49-74a2-f19bd0d115e7@astro.rug.nl>
Message-ID: <BFD49D17-2480-4173-A7A5-708B8DF44252@lal.in2p3.fr>



> Begin forwarded message:
> 
> From: Florent Mertens <mertens at astro.rug.nl>
> Subject: Re: Workshop interferometrie 21cm a Madison
> Date: 5 July 2022 at 10:21:48 CEST
> To: R?za Ansari <ansari at lal.in2p3.fr>
> 
> Bonjour R?za,
> 
> ?a m'a ferai tr?s plairi de vous pr?senter le dernier status des observation LOFAR, avec un focus particuler sur les aspects de calibration donc. En voici un abstract:
> 
> Title: Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen from LOFAR
> 
> Abstract: Direct detection of the Epoch of Reionization via the redshifted 21-cm line will have unprecedented implications on the study of structure formation in the early Universe. This exciting goal is challenged by the difficulty of extracting the feeble 21-cm signal buried under bright astrophysical foregrounds and contaminated by numerous systematics. The LOFAR-EoR project has recently made considerable progress in this direction. We have now published the deepest upper limit on the signal power spectrum at redshift 9, which has made it possible to set a few constraints on the physics of the IGM during the EoR. We are also making progress towards a deep upper limit at multiple redshifts. In this talk, I will present our new upper limits with a focus on the latest developments in instrument calibration and foreground suppression that have enabled these progresses.
> 
> En te souhaitant une bonne journ?e,
> 
> Florent

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From mspinelli at phys.ethz.ch  Wed Jul  6 06:32:03 2022
From: mspinelli at phys.ethz.ch (Marta Spinelli)
Date: Wed, 6 Jul 2022 13:32:03 +0200
Subject: [Soc21cm] Abstract submission for the 21cm Workshop
Message-ID: <00107460-da47-eb7d-fe93-8ccc0a8a77c7@phys.ethz.ch>

Dear SOC,

my name is Marta Spinelli and I am a postdoc in ETH Zurich working on 
MeerKAT Intensity Mapping data and taking active part in the simulation 
effort for the preparation of the SKA Observatory.

I am submitting an abstract for the 21 cm workshop you are organizing 
hoping it could be of interest. The abstract is quite generic but I 
could also talk about something more specific in case.

Unfortunately I can not attend in person but I will be happy to 
participate online.

*
*

Best regards,

marta

*
*

*
*

*Title: 21cm Intensity Mapping: opportunities and challenges on the road 
to the SKA Observatory*

**

Abstract: A key point for 21cm Intensity Mapping studies in the 
post-reionization Universe is the subtraction of the bright foregrounds,

orders of magnitude stronger than the pristine cosmologicalsignal.

In this talk, I will briefly describe the status of MeerKLASS, an 
Intensity Mapping survey with

the MeerKAT telescope. Moreover, I will report the results of an effort, 
led by the SKA Intensity Mapping Focus Group,

to construct a realistic mock data cube with improved skymodel and 
instrument characterization,

and to assess through simulations the performance offoreground cleaning 
methods.

Iwill discuss current limitations and the roadmap to the SKAO era.
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From christopher.dilullo at nasa.gov  Tue Jul 19 15:22:14 2022
From: christopher.dilullo at nasa.gov (DiLullo, Christopher (GSFC-665.0)[NPP POST-DOC CONTRACT])
Date: Tue, 19 Jul 2022 20:22:14 +0000
Subject: [Soc21cm] Abstract for Talk at 21 cm Cosmology Workshop
Message-ID: <1CD54713-34A9-4B75-A44E-195695904FA9@contoso.com>

To the SOC,

I am interested in attending and presenting at the 21 cm Cosmology Workshop in August. Please find below the title and abstract for my presentation:



Characterization of the LWA Antenna and Station Beam Pattern



I will present ongoing work to better characterize the response of the Long Wavelength Array (LWA) antenna. Recent work has focused on directly measuring the impedance mismatch between the antenna and front end electronics (FEEs). Custom calibration and testing fixtures were created which allows for measurement of the antenna impedance at the feed points on the FEE boards. These measurements should yield better characterization of the LWA antenna response across frequency than simulations which were previously used to model the impedance mismatch. The impedance mismatch directly affects both 21 cm experiments using the LWA antenna and LWA sky survey results. I will also present ongoing work which aims to better understand the effects of sidelobes on efforts to detect the global 21 cm signal using beamforming techniques with LWA-SV. This work will help highlight potential avenues to improve systematics which currently obscure detection of the signal.


I would also like to ask about the workshop registration fee and hotel block rates. I need this information so I can submit an accurate travel expensive authorization to my sponsoring agency. I would greatly appreciate a quick response as expensive authorizations can take a few weeks to be approved.

Thank you,
Christopher DiLullo
Observational Cosmology Lab
NASA Goddard Space Flight Center
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From gtc30 at cam.ac.uk  Tue Jul 19 15:57:39 2022
From: gtc30 at cam.ac.uk (George Carter)
Date: Tue, 19 Jul 2022 20:57:39 +0000
Subject: [Soc21cm] Talk contribution to 21cm Cosmology Workshop 2022
Message-ID: <LO6P265MB6489D2E3F32F63E0D812EAF5FA8F9@LO6P265MB6489.GBRP265.PROD.OUTLOOK.COM>

Dear Sir/Madam,

I am a second year PhD candidate at the University of Cambridge, supervised by Dr. Nima Razavi-Ghods and co-supervised by Dr. Will Handley and Dr. Mark Ashdown. My research focuses on developing a new low frequency global sky model based on a Bayesian analysis of available sky surveys. The aim of the project is to create a model that will be useful for foreground mitigation, in both Global 21cm experiments and upcoming attempts to detect the 21cm brightness temperature power spectrum.

I am interested in being considered for contributing a talk to the workshop about the research we are conducting on this new sky model. I have attached a talk abstract for a presentation to this email and would be happy to elaborate further on my plan for the presentation if required.


Kind regards,
George Carter
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From will.tyndall at yale.edu  Tue Jul 19 21:33:50 2022
From: will.tyndall at yale.edu (Will Tyndall)
Date: Tue, 19 Jul 2022 22:33:50 -0400
Subject: [Soc21cm] Conference Attendance
Message-ID: <CADMbnaObOuZOg4rtw4FnNLM8hnxHjobdhC5mu8K+q3A7gNg4-Q@mail.gmail.com>

Greetings,

I'm a graduate student in Laura Newburgh's group at Yale University, and I
would be interested in attending the SOC 21cm workshop. I will have no
issue with lodging/transportation, and intend to stay with friends in the
area.

-- 
Thanks,

William C. Tyndall
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From alex.reda at yale.edu  Wed Jul 20 12:57:12 2022
From: alex.reda at yale.edu (Alex Reda)
Date: Wed, 20 Jul 2022 13:57:12 -0400
Subject: [Soc21cm] Holography for CHIME @ 21cm Workshop
Message-ID: <CAF-ztwNuAdrZSOUvsQgss-paB4nW=kyaXmwECYDfXjRpQSZ=YQ@mail.gmail.com>

Hi all,

I'm Alex Reda, a soon-to-be 4th year graduate student with Laura Newburgh
at Yale working on CHIME. I'd be interested in participating and could give
a talk about how CHIME is using holography as a core part of its beam
calibration effort.

Thanks and best,
Alex
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From pttimbie at wisc.edu  Thu Jul 21 15:59:52 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 20:59:52 +0000
Subject: [Soc21cm] Holography for CHIME @ 21cm Workshop
In-Reply-To: <CAF-ztwNuAdrZSOUvsQgss-paB4nW=kyaXmwECYDfXjRpQSZ=YQ@mail.gmail.com>
References: <CAF-ztwNuAdrZSOUvsQgss-paB4nW=kyaXmwECYDfXjRpQSZ=YQ@mail.gmail.com>
Message-ID: <CH2PR06MB6632F9D9B2F080763CCEF116B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi Alex -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted on the workshop web page in the next week or so: https://agenda.hep.wisc.edu/event/1784/

The Registration page  (for both in-person or remote attendance) in that website will open in the next few days.  Pages with advice about Travel and Accommodations are ready now, however.

We're looking forward to seeing you in Madison!

Best wishes ... Peter (for the SoC)



Peter Timbie

6209 Chamberlin Hall

1150 University Ave

Department of Physics

UW -Madison

608-890-2002

________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Alex Reda <alex.reda at yale.edu>
Sent: Wednesday, July 20, 2022 12:57 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] Holography for CHIME @ 21cm Workshop

Hi all,

I'm Alex Reda, a soon-to-be 4th year graduate student with Laura Newburgh at Yale working on CHIME. I'd be interested in participating and could give a talk about how CHIME is using holography as a core part of its beam calibration effort.

Thanks and best,
Alex
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From pttimbie at wisc.edu  Thu Jul 21 16:02:44 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 21:02:44 +0000
Subject: [Soc21cm] Conference Attendance
In-Reply-To: <CADMbnaObOuZOg4rtw4FnNLM8hnxHjobdhC5mu8K+q3A7gNg4-Q@mail.gmail.com>
References: <CADMbnaObOuZOg4rtw4FnNLM8hnxHjobdhC5mu8K+q3A7gNg4-Q@mail.gmail.com>
Message-ID: <CH2PR06MB6632F7D29BB37C97C69C513DB4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi William -

We're looking forward to seeing you in Madison!

The Registration page  (https://agenda.hep.wisc.edu/event/1784/ will open in the next few days.  Pages with advice about Travel and Accommodations are ready now, however.

Best wishes ... Peter (for the SoC)



Peter Timbie

6209 Chamberlin Hall

1150 University Ave

Department of Physics

UW -Madison

608-890-2002

________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Will Tyndall <will.tyndall at yale.edu>
Sent: Tuesday, July 19, 2022 9:33 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] Conference Attendance

Greetings,

I'm a graduate student in Laura Newburgh's group at Yale University, and I would be interested in attending the SOC 21cm workshop. I will have no issue with lodging/transportation, and intend to stay with friends in the area.

--
Thanks,

William C. Tyndall
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From pttimbie at wisc.edu  Thu Jul 21 16:10:57 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 21:10:57 +0000
Subject: [Soc21cm] Talk contribution to 21cm Cosmology Workshop 2022
In-Reply-To: <LO6P265MB6489D2E3F32F63E0D812EAF5FA8F9@LO6P265MB6489.GBRP265.PROD.OUTLOOK.COM>
References: <LO6P265MB6489D2E3F32F63E0D812EAF5FA8F9@LO6P265MB6489.GBRP265.PROD.OUTLOOK.COM>
Message-ID: <CH2PR06MB6632921C0FA377528216BFF3B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi George -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/

The Registration page (for either in-person or remote attendance) is now open as are pages with advice about Travel and Accommodations.

We're looking forward to seeing you in Madison!

Best wishes ... Peter (for the SoC)

Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711
608-890-2002


________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of George Carter <gtc30 at cam.ac.uk>
Sent: Tuesday, July 19, 2022 3:57 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] Talk contribution to 21cm Cosmology Workshop 2022

Dear Sir/Madam,

I am a second year PhD candidate at the University of Cambridge, supervised by Dr. Nima Razavi-Ghods and co-supervised by Dr. Will Handley and Dr. Mark Ashdown. My research focuses on developing a new low frequency global sky model based on a Bayesian analysis of available sky surveys. The aim of the project is to create a model that will be useful for foreground mitigation, in both Global 21cm experiments and upcoming attempts to detect the 21cm brightness temperature power spectrum.

I am interested in being considered for contributing a talk to the workshop about the research we are conducting on this new sky model. I have attached a talk abstract for a presentation to this email and would be happy to elaborate further on my plan for the presentation if required.


Kind regards,
George Carter
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From pttimbie at wisc.edu  Thu Jul 21 16:11:55 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 21:11:55 +0000
Subject: [Soc21cm] Abstract for Talk at 21 cm Cosmology Workshop
In-Reply-To: <1CD54713-34A9-4B75-A44E-195695904FA9@contoso.com>
References: <1CD54713-34A9-4B75-A44E-195695904FA9@contoso.com>
Message-ID: <CH2PR06MB66326E16468BB0AA9C5CF038B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi Christopher -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/

The Registration page (for either in-person or remote attendance) is now open as are pages with advice about Travel and Accommodations.

We're looking forward to seeing you in Madison!

Best wishes ... Peter (for the SoC)

Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711
608-890-2002


________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of DiLullo, Christopher (GSFC-665.0)[NPP POST-DOC CONTRACT] via Soc21cm <soc21cm at lists.physics.wisc.edu>
Sent: Tuesday, July 19, 2022 3:22 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] Abstract for Talk at 21 cm Cosmology Workshop


To the SOC,



I am interested in attending and presenting at the 21 cm Cosmology Workshop in August. Please find below the title and abstract for my presentation:



Characterization of the LWA Antenna and Station Beam Pattern



I will present ongoing work to better characterize the response of the Long Wavelength Array (LWA) antenna. Recent work has focused on directly measuring the impedance mismatch between the antenna and front end electronics (FEEs). Custom calibration and testing fixtures were created which allows for measurement of the antenna impedance at the feed points on the FEE boards. These measurements should yield better characterization of the LWA antenna response across frequency than simulations which were previously used to model the impedance mismatch. The impedance mismatch directly affects both 21 cm experiments using the LWA antenna and LWA sky survey results. I will also present ongoing work which aims to better understand the effects of sidelobes on efforts to detect the global 21 cm signal using beamforming techniques with LWA-SV. This work will help highlight potential avenues to improve systematics which currently obscure detection of the signal.



I would also like to ask about the workshop registration fee and hotel block rates. I need this information so I can submit an accurate travel expensive authorization to my sponsoring agency. I would greatly appreciate a quick response as expensive authorizations can take a few weeks to be approved.



Thank you,

Christopher DiLullo

Observational Cosmology Lab

NASA Goddard Space Flight Center
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From pttimbie at wisc.edu  Thu Jul 21 17:00:27 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 22:00:27 +0000
Subject: [Soc21cm] Abstract submission for the 21cm Workshop
In-Reply-To: <00107460-da47-eb7d-fe93-8ccc0a8a77c7@phys.ethz.ch>
References: <00107460-da47-eb7d-fe93-8ccc0a8a77c7@phys.ethz.ch>
Message-ID: <CH2PR06MB66326034BB525BC29E3B9E25B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi Marta -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/

The Registration page is now open.  (Note that since you will be attending remotely, there is no registration fee.  Be sure to check the box before "I am a fully remote participant or a UW?Madison employee.")

We're looking forward to seeing you (remotely) in Madison!

Best wishes ... Peter (for the SoC)

Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711608-890-2002

________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Marta Spinelli <mspinelli at phys.ethz.ch>
Sent: Wednesday, July 6, 2022 6:32 AM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] Abstract submission for the 21cm Workshop


Dear SOC,

my name is Marta Spinelli and I am a postdoc in ETH Zurich working on MeerKAT Intensity Mapping data and taking active part in the simulation effort for the preparation of the SKA Observatory.

I am submitting an abstract for the 21 cm workshop you are organizing hoping it could be of interest. The abstract is quite generic but I could also talk about something more specific in case.

Unfortunately I can not attend in person but I will be happy to participate online.


Best regards,

marta



Title: 21cm Intensity Mapping: opportunities and challenges on the road to the SKA Observatory

Abstract: A key point for 21cm Intensity Mapping studies in the post-reionization Universe is the subtraction of the bright foregrounds,

orders of magnitude stronger than the pristine cosmological signal.

In this talk, I will briefly describe the status of MeerKLASS, an Intensity Mapping survey with

the MeerKAT telescope. Moreover, I will report the results of an effort, led by the SKA Intensity Mapping Focus Group,

to construct a realistic mock data cube with improved sky model and instrument characterization,

and to assess through simulations the performance of foreground cleaning methods.

I will discuss current limitations and the roadmap to the SKAO era.
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From pttimbie at wisc.edu  Thu Jul 21 17:09:49 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 22:09:49 +0000
Subject: [Soc21cm] 21 cm Cosmology Workshop
Message-ID: <CH2PR06MB6632F396F002B95AC9D61C62B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Dear Florent -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/

The Registration page is now open.  (We hope that you can attend in person, but if you will be attending remotely, note that there is no registration fee.  Be sure to check the box before "I am a fully remote participant or a UW?Madison employee.")

We're looking forward to seeing you (remotely or in person) at the Workshop!

Best wishes ... Peter (for the SoC)


Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711608-890-2002

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From pttimbie at wisc.edu  Thu Jul 21 17:14:11 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 22:14:11 +0000
Subject: [Soc21cm] 21cm Systematics Workshop Madison 31Aug/1Sept
In-Reply-To: <BLAPR10MB48176869462B4D40D0D7E5379ABF9@BLAPR10MB4817.namprd10.prod.outlook.com>
References: <BLAPR10MB48176869462B4D40D0D7E5379ABF9@BLAPR10MB4817.namprd10.prod.outlook.com>
Message-ID: <CH2PR06MB6632FF61715FE2D12D9932F7B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Hi James -

Thank you for your abstract/proposal for the 2022 21 cm Cosmology Workshop.  We are delighted to include your presentation in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/  (Thanks for the details about your schedule.)

The Registration page is now open along with advice about Travel and Accommodations.

We're looking forward to seeing you in Madison!

Best wishes ... Peter (for the SoC)


Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711
608-890-2002

________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Aguirre, James <jaguirre at sas.upenn.edu>
Sent: Sunday, July 3, 2022 2:11 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] 21cm Systematics Workshop Madison 31Aug/1Sept


I am interested in attending the conference.  An abstract for a presentation is below.  Because of the start of classes, I am unable to attend in person on Thursday, September 1, but could attend in-person on either Wednesday or Friday (for the full day).  Virtually, I am only limited by teaching 1:45 ? 3:15 on the 1st.



Validation of Software Pipelines: the HERA Experience



The extraction of the desired signal from 21 cm cosmology experiments faces steep challenges: the combined issues of data size, weak signal, strong foregrounds, and complex instruments couple with sophisticated, constantly-evolving, multi-step software pipelines developed by large groups to produce a situation which undermines confidence in the final analysis.  The challenges of producing robust scientific results from complicated instrumentation and analysis are of course not unique to 21 cm cosmology, and many strategies have been developed for these purposes, the most important for our purposes being end-to-end simulations of the instrument, its systematics, and all expected signals, processed with a high degree of realism through the entire analysis chain, for which I will term ?validation? as shorthand.  The possibility of confirmation bias argues for having the validation effort be independent of the data analysis team.  I will take as an example the HERA validation effort, which was developed rather late in the instrument and analysis process, and describe how we interface with the analysis pipeline group, including adequately understanding and simulating systematic effects,  and the instrument builders and their measurements and simulations (antenna response, instrument noise, bandpass) to produce a validation of the HERA pipeline. Specific and unexpected concerns which arose as part of this process, and potential lessons for other groups will be discussed.



James Aguirre

Associate Professor

Department of Physics and Astronomy

University of Pennsylvania

David Rittenhouse Laboratory 4N4b

209 South 33rd Street Philadelphia, PA 19104

(215) 898-9596 (office)

(215) 898-9646 (lab)

jaguirre at sas.upenn.edu<mailto:jaguirre at sas.upenn.edu>

http://www.sas.upenn.edu/~jaguirre/

https://calendly.com/jaguirre-upenn/30min


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From pttimbie at wisc.edu  Thu Jul 21 17:18:45 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 21 Jul 2022 22:18:45 +0000
Subject: [Soc21cm] 21 cm Workshop Abstract Submission
In-Reply-To: <CAN5EFb2QdcvWY68M0bbQv1Pt7ejjrzB2cpC5Zoc0tyWnKAJddw@mail.gmail.com>
References: <CAN5EFb2QdcvWY68M0bbQv1Pt7ejjrzB2cpC5Zoc0tyWnKAJddw@mail.gmail.com>
Message-ID: <CH2PR06MB66328ACDFAC42A22B740D4D2B4919@CH2PR06MB6632.namprd06.prod.outlook.com>

Dear Ruby -

Thank you for your two abstracts/proposals for the 2022 21 cm Cosmology Workshop.  We are delighted to include them in the workshop program.   The schedule is still coming together and will be posted in the next week or so on the conference web page: https://agenda.hep.wisc.edu/event/1784/


The Registration page is now open.  (We hope that you can attend in person, but if you will be attending remotely, note that there is no registration fee.  Be sure to check the box before "I am a fully remote participant or a UW?Madison employee.")

We're looking forward to seeing you (remotely or in person) at the Workshop!

Best wishes ... Peter (for the SoC)


Peter Timbie
Department of Physics
6209 Chamberlin Hall
UW - Madison
Madison, WI 53711
608-890-2002
________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Ruby Byrne <rbyrne at caltech.edu>
Sent: Thursday, June 30, 2022 6:26 PM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Subject: [Soc21cm] 21 cm Workshop Abstract Submission

I am interested in attending the 21 cm Cosmology workshop in Madison. I am attaching two abstracts for consideration for formal presentations.

Thanks,

Ruby Byrne
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From steven.cunnington at manchester.ac.uk  Wed Jul 27 08:04:43 2022
From: steven.cunnington at manchester.ac.uk (Steven Cunnington)
Date: Wed, 27 Jul 2022 13:04:43 +0000
Subject: [Soc21cm] Talk abstract submission for 21cm Cosmology Workshop
Message-ID: <F2367207-49B3-43AB-9939-ED9BEC49EB4F@manchester.ac.uk>

Hi,

Sorry I missed the deadline for this. I spoke with Peter Timbie who suggested I submit a talk and space may still be available. No problem if not though, of course. I?ve also registered as a remote attendee. 

My talk title and abstract are below. I can try to tailor this slightly to emphasise using cross-correlations for systematic mitigation for a nice synergy with your proposed agenda.

Title: MeerKAT HI intensity mapping cross-correlations with overlapping galaxy surveys at z~0.4.

Abstract: I will present details of the first detection of cosmological signal using HI intensity mapping with a multi-dish array. For this we used the 64 dish MeerKAT telescope, a pathfinder for the Square Kilometre Array Observatory (SKAO), operating in single-dish mode, whereby the array is used as a collection of scanning auto-correlation dishes rather than as an interferometer. The detection is achieved in cross-correlation with overlapping galaxies from the WiggleZ Dark Energy Survey. The intensity mapping data was collected from 10.5 hours of pilot observations using MeerKAT's L-band over six nights, covering ~200deg^2 in the 11hr field of WiggleZ. We used data in the frequency range 971-1023 MHZ (0.39 < z < 0.46 in redshift), where impact from RFI is most minimal. This detection is the first evidence of its kind to suggest a multi-dish array operating in single-dish mode can probe cosmological signals. This marks an important milestone in the roadmap for the large scale structure science case with the full SKAO.

Many thanks,
Steve

From julien.girard at obspm.fr  Wed Jul 27 08:20:49 2022
From: julien.girard at obspm.fr (Julien Girard)
Date: Wed, 27 Jul 2022 15:20:49 +0200
Subject: [Soc21cm] Abstract for presentation
Message-ID: <B15FEA01-0983-4A4E-9CB4-B84E6C06C2B6@obspm.fr>


Dear SOC 
I write you on the behalf of Reza Ansari who told me to send you relevant information.


Please find attached my title and short abstract for my workshop pr?sentation:

Speaker: Julien N. Girard

Title: "Capturing the shape and variations of beams with holography"

Abstract: 
"With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent work carried on VLA and MeerKAT beam modelling, required for high dynamic imaging with these large interferometers. Applied at low frequencies, I will also discuss the impact of this modelling on current Cosmic Dawn observations."



As a matter of logistics, I am currently on the french time zone. Do you have any idea when this presentation will occur? (chicago time) I need to organize myself for taking care of my child. Is it possible to put the presentation after 11am local time (yours)?
Any time in the early-mid afternoon is fine also, as parent #2 will be home :)
If it is too difficult to arrange (due to sessions placement), then tell me so I can organise in advance !

Many thanks.

Cheers

Julien Girard

From julien.girard at obspm.fr  Thu Jul 28 08:55:09 2022
From: julien.girard at obspm.fr (Julien Girard)
Date: Thu, 28 Jul 2022 15:55:09 +0200
Subject: [Soc21cm] Abstract for presentation
In-Reply-To: <B15FEA01-0983-4A4E-9CB4-B84E6C06C2B6@obspm.fr>
References: <B15FEA01-0983-4A4E-9CB4-B84E6C06C2B6@obspm.fr>
Message-ID: <EF2F92BD-CEC6-4A86-8E40-7B6CCEFB2942@obspm.fr>

Dear colleagues, 
Would it be possible to update my abstract with the following?

Abstract: 
"With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent modelling work carried on VLA and MeerKAT beam modelling, required for high dynamic imaging with these large interferometers. At low frequencies with the NenuFAR radiotelescope, I will also discuss the impact of this modelling on current Cosmic Dawn observations."

many thanks !

Julien Girard

> Le 27 juil. 2022 ? 15:20, Julien Girard <julien.girard at obspm.fr> a ?crit :
> 
> 
> Dear SOC 
> I write you on the behalf of Reza Ansari who told me to send you relevant information.
> 
> 
> Please find attached my title and short abstract for my workshop pr?sentation:
> 
> Speaker: Julien N. Girard
> 
> Title: "Capturing the shape and variations of beams with holography"
> 
> Abstract: 
> "With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent work carried on VLA and MeerKAT beam modelling, required for high dynamic imaging with these large interferometers. Applied at low frequencies, I will also discuss the impact of this modelling on current Cosmic Dawn observations."
> 
> 
> 
> As a matter of logistics, I am currently on the french time zone. Do you have any idea when this presentation will occur? (chicago time) I need to organize myself for taking care of my child. Is it possible to put the presentation after 11am local time (yours)?
> Any time in the early-mid afternoon is fine also, as parent #2 will be home :)
> If it is too difficult to arrange (due to sessions placement), then tell me so I can organise in advance !
> 
> Many thanks.
> 
> Cheers
> 
> Julien Girard

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From pttimbie at wisc.edu  Thu Jul 28 10:45:28 2022
From: pttimbie at wisc.edu (Peter T Timbie)
Date: Thu, 28 Jul 2022 15:45:28 +0000
Subject: [Soc21cm] Abstract for presentation
In-Reply-To: <EF2F92BD-CEC6-4A86-8E40-7B6CCEFB2942@obspm.fr>
References: <B15FEA01-0983-4A4E-9CB4-B84E6C06C2B6@obspm.fr>
 <EF2F92BD-CEC6-4A86-8E40-7B6CCEFB2942@obspm.fr>
Message-ID: <CH2PR06MB6632C9E2CEA55A2900DB24BCB4969@CH2PR06MB6632.namprd06.prod.outlook.com>

Thanks Julien - I've updated your abstract.

We're putting together the detailed workshop schedule now -- we'll take into account your schedule constraints.   The rough outline is here:    https://agenda.hep.wisc.edu/event/1784/

Best....Peter

Peter Timbie
Department of Physics
UW Madison
608-890-2002


________________________________
From: Soc21cm <soc21cm-bounces at lists.physics.wisc.edu> on behalf of Julien Girard <julien.girard at obspm.fr>
Sent: Thursday, July 28, 2022 8:55 AM
To: soc21cm at lists.physics.wisc.edu <soc21cm at lists.physics.wisc.edu>
Cc: Julien Girard <julien.girard at obspm.fr>
Subject: Re: [Soc21cm] Abstract for presentation

Dear colleagues,
Would it be possible to update my abstract with the following?

Abstract:
"With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent modelling work carried on VLA and MeerKAT beam modelling, required for high dynamic imaging with these large interferometers. At low frequencies with the NenuFAR radiotelescope, I will also discuss the impact of this modelling on current Cosmic Dawn observations."

many thanks !

Julien Girard

Le 27 juil. 2022 ? 15:20, Julien Girard <julien.girard at obspm.fr<mailto:julien.girard at obspm.fr>> a ?crit :


Dear SOC
I write you on the behalf of Reza Ansari who told me to send you relevant information.


Please find attached my title and short abstract for my workshop pr?sentation:

Speaker: Julien N. Girard

Title: "Capturing the shape and variations of beams with holography"

Abstract:
"With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent work carried on VLA and MeerKAT beam modelling, required for high dynamic imaging with these large interferometers. Applied at low frequencies, I will also discuss the impact of this modelling on current Cosmic Dawn observations."



As a matter of logistics, I am currently on the french time zone. Do you have any idea when this presentation will occur? (chicago time) I need to organize myself for taking care of my child. Is it possible to put the presentation after 11am local time (yours)?
Any time in the early-mid afternoon is fine also, as parent #2 will be home :)
If it is too difficult to arrange (due to sessions placement), then tell me so I can organise in advance !

Many thanks.

Cheers

Julien Girard

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