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2016 LIGO-DAWN Workshop II

Planning for the post-detection era in gravitational-wave detectors and astrophysics

GeorgiaTech, Atlanta, July 7-8 2016


With the 11 February 2016 announcement by LIGO of the detection of GW150914, the era of gravitational wave astronomy has now passed a historical threshold. LIGO's first gravitational wave event opens new avenues for astrophysical exploration and data analysis enhancements informed by direct detection. It should be recalled that the detectors that brought LIGO to success were first conceived almost a quarter century ago. Thus equally importantly, now is the time to start to plan how (and where) to build more sensitive third-generation detectors to probe the gravitational wave Universe to higher redshift.

Participants in this workshop will discuss how these first few detections might inform which paths offer the best opportunities forward, and how the community should begin to develop plans for the international network of second and third generation instruments. Outreach of gravitational wave science to the broad scientific community will also be reviewed.We invite gravitational wave scientists, astronomers, and astrophysicists to participate in these discussions. Focus panels will summarize discussions and write up conclusions after the meeting.


The program is organized into 3 sessions each addressing a particular set of questions. The sessions are organized around breaks, with talks before the break to set the stage and to introduce the important questions, and discussion periods after the break.The breaks are intended as time to discuss the topic among themselves.Individuals or small groups wanting to raise particular ideas or questions during the discussion period are encouraged to contact the session chair or the speakers during the break, to allow them to organize the discussion by grouping similar ideas/topics together. The session chairs and speakers will moderate the discussion portion of each session.

The report from this year's Dawn-II 2016 workshop is now available: Here

Click here to endorse the report

Thursday July 7, 2016

8:30 - 9:00 am: Intro, review outcomes of Dawn I (Albert Lazzarini) G1601459

9:00 - 12:00: Session A: aLIGO near and longer term future
9:00 - 9:30 Reaching Advanced LIGO Detector Design Sensitivity (Daniel Sigg, 20+10) G1601449
9:30 - 10:00 Post-detection GW Astrophysics: What We Know and Don't Know About the GW Sky (But Really Want To!) (Salvatore Vitale, 20+10) G1601471
10:00 - 10:30 Getting an A+: Sensitivity Enhancements Beyond the Advanced LIGO Design — Plans, Timelines, and Costs (Mike Zucker, 20+10) G1601435
10:30 - 10:45 Break
10:45 - 11:15 Progress and Plans in Optical Coating Research (Marty Fejer, 20+10)
11:15 - 11:45 LIGO Voyager: 3G interferometer in a 1G facility (Rana Adhikari, 20+10) G1601461
11:45 - 13:00 Lunch
13:00 - 14:30 Discussion on near term priorities

14:30 - 18:00: Session B: international network and multi-messenger astronomy
14:30 - 15:00 Status post O1: predictions for sources, rates, localization (Leo Singer, 20+10) G1601468
15:00 - 15:30 “Observing scenarios”: post-O3 scenarios, how upgrades and data taking can be managed for best science, includingVirgo and Kagra timeline, expectations on evolution of their sensitivities, and prospects for LIGO-India (Lisa Barsotti, 20+10) G1601460
15:30-16:00 Break
16:00-16:45 Panel: potential of a coordinated R&D program and role of GWAC (Gaby Gonzalez, Giovanni LoSurdo, Pedro Marronetti, Sanjit Mitra, Shinji Miyoki, Dave Reitze)
16:45-17:15 EM partnerships and MMA: what did and what did not work in O1 (Peter Shawhan, 20+10) G1601458
17:15-18:00 Panel: how should agreements be modified or the model for partnership changed? (Jim Annis, Ken Chambers, Neil Gehrels, Jonah Kanner, Antonia Rowlinson)

Friday July 8, 2016

8:30 - 12:00: Session C: Long term planning by the international community for 3rd generation detectors
08:30 - 08:45 Introductory remarks on organizing the international community: issues, open questions, opportunities (D. Reitze) G1601473
08:45 - 09:30 The case for a science study for 3G facilities: what does the GW need to do next? (R. Weiss 30' + 15') G1601499
09:30 - 10:00 Experience in the EU with the ET design study - lessons learned, next plans (M. Punturo 20' + 10') G1601484
10:00 - 10:30 Break
10:30 - 11:00 Lessons from the ILC: How the international HEP community went about establishing an international design effort (J. Brau 20'+10') G1601498
  • leveraging existing collaborations, cultural and programmatic constraints among funding agencies, cooperation & compromise - how to cooperate and / or collaborate on facilities funded and /or hosted by different countries …
11:00 - 12:00 General discussion: What are the next steps in the US & EU to establish an international effort for 3G detectors? (All) G1601459
  • Do we need a common study that updates the ET study and integrate the new 3G option in US?
  • How to organise it?
  • What are the main questions to be answered by the study?
  • Science Case
  • Number and possible location of the observatories, global network with 2G+ detectors
  • Possible geometries
  • Global R&D network
  • Needed technologies
  • Timing
  • Funding
Automatic EM alert proposal

12:00 - 13:30: Lunch
13:30 - 15:00: Summary discussion


Attendance at the workshop is limited to approximately 80 people. Registration fee is $100.

Please register at this link:

Remote Participation Instructions

People who are unable to attend the workshop in person are welcome to participate remotely in any or all sessions. Audioconferencing will use TeamSpeak, and we will simultaneously have a video stream of the slides that you can view in a web browser (no other software needed).


Step-by-step instructions for installing and connecting can be found at this link, or the concise instructions below may be enough for you:

Download the TeamSpeak 3 client software (for free) from and install it. Then, to connect to the workshop, press Ctrl-S (or go to Connections-->Connect on the menu bar) and enter a server address of and the server password. (LSC/Virgo members can find the server password at ; others, please send email to and ask for the TeamSpeak server password for Double-click on the "What comes next for LIGO?" channel name to switch to it.

TeamSpeak has a rudimentary Echo Cancellation feature but it is NOT enabled by default, and is a bit hard to find in the Options. Therefore, to prevent echoes, it is strongly recommended that you use either an echo-canceling speakerphone unit such as a Phoenix Duet, or else headphones. Also, mute your connection (by clicking on the microphone icon with the red X) whenever you are not speaking.


click here:


The workshop will take place at Georgia Tech, in the Scheller College of Business, 800 West Peachtree Street NW - Atlanta GA 30308 - room 102


From the Atlanta Airport, we recommend using the MARTA train.
The Midtown MARTA station is stop N4 on the North-South line. It is a 20 minute ride from the airport.
The Georgia Tech Trolley provides daily transportation to and from the Midtown MARTA station; it departs from the rear of the station (from Peachtree Place) about every 30 minutes.


We have reserved a block of room at the Georgia Tech hotel (closest to the meeting venue) and one at the Crown Plaza hotel. The hotel room blocks has been extended to June 22.


Albert Lazzarini
Andri Gretarsson
B.S. Sathyaprakash
Benjamin Lackey
Benoit Mours
Beverly Berger
Bob Eisenstein
Brian Lantz
Collin Capano
Dave Trivett
David Mc Clelland
David Reitze
David Shoemaker
Deirdre Shoemaker
Eric Gustafson
Federico Ferrini
Frederick Raab
Gabriela Gonzalez
Giovanni Losurdo
Gregory Harry
Jaclyn Sanders
James Annis
James Clark
Jim Brau
Jim Hough
Jo van den Brand
Jonah Kanner
Joe Giaime
Juan Calderon Bustillo
Junwei Cao
Karelle Siellez
Keith Riles
Ken Chambers
Laura Cadonati
Leo Singer
Manuela Campanelli
Marco Cavaglia
Marek Jan Szczepanczyk
Mark Hannam
Martin Fejer
Matt Evans
Michael Zucker
Michele Punturo
Neil Gehrels
Norna Robertson
Pablo Laguna
Pedro Marronetti
Peter Shawhan
Rai Weiss
rana adhikari
Riccardo Bassiri
Riccardo DeSalvo
Salvatore Vitale
Sheila Rowan
Shinji Miyoki
Shude Mao
Stefan Ballmer
Steven Penn
Szabolcs Marka
Xavier Siemens

Organizing Committee

Beverly Berger
Laura Cadonati
Marco Cavaglia
Gabriela Gonzalez
Albert Lazzarini
David Reitze

Image credit: K. Jani, M. Clark, M. Kinsley - Center for Relativistic Astrophysics, GeorgiaTech
I Attachment Action Size Date Who Comment
Dawn-II-Report-FirstDraft-v1.pdfpdf Dawn-II-Report-FirstDraft-v1.pdf manage 876 K 2016-10-04 - 03:24 UnknownUser First draft of the Dawn-II Workshop report
Dawn-II-Report-SecondDraft-v2.pdfpdf Dawn-II-Report-SecondDraft-v2.pdf manage 895 K 2016-11-17 - 23:37 UnknownUser  
Dawn-II-Report-ThirdFinal-v3.pdfpdf Dawn-II-Report-ThirdFinal-v3.pdf manage 907 K 2016-12-16 - 15:43 UnknownUser  
dawn.jpgjpg dawn.jpg manage 31 K 2016-04-18 - 19:25 UnknownUser  
Topic revision: r47 - 2016-12-16,
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