gravitational wave open data workshop ligoltech/gwodw2011/ 2011 october 27/28

LAAAP April 2011 LIGO-G1101181

Gravitational WaveOpen Data Workshop

http://www.ligo.caltech.edu/gwodw2011/2011 October 27/28

Organized by Steve Groom, Christian Ott, Roy Williams and the LOC

atLIGO Livingston Observatory, Louisiana

Operated by LIGO Lab (Caltech, MIT)On behalf of the LIGO Scientific ConsortiumSupported by National Science Foundation


Why are we here?

LIGO-G1101181 slide 3

LIGO ObservatoryLIGO ObservatoryLivingston, LouisianaLivingston, Louisiana


GWODW workshop

Advanced LIGO First science run in 2015 (we hope!) Multiple GW detections in 2015 (we hope!) Global observatory with VIRGO, Indigo (we hope!)

We are here to find out: “What do astronomers want from LIGO Open Data?”


GWODW workshop

Community input Report Implementation Science

= Science Program

+ “Breakout Groups”


ho

wstu

ffwo

rks.c

om

So here is some

CANDY …

We want to know what is in YOUR heads …


Breakout groups

A: Information Technology B: Smoking Gun: finding the flash or afterglow

C: Full Data: science from the strain channel

D: New searches: new science, fresh ideas


LIGO Open Data Plans


“The top 10” benefits of data sharing in astronomy1) Early data releases greatly improve the final product

2) Early data releases enable coeval science

3) More science is extracted from the same dataset

4) Enables reproducibility of science results

5) Synergy between different datasets

6) Cross-disciplinary science

7) Sometimes the only way to secure scarce resources

8) More citations and prestige to the team

9) Education and public outreach

10) Ethics and broader impact

EM Smoking Gun

Coincidence and multi-messenger

Need broad support

Eg Astronomy and data-mining

Jobs for LIGO Postdocs


Data sharing is not free: comes with costs and risks:1) requires higher standards than for internal use, including publications describing data formats, provenance and metadata (insiders’ "know-how")2) the cost of curation (servers, help desk, etc.)3) risk of being “scooped” (larger for very focused/specialized data streams, more likely for an experiment than for a survey)

But: “Does releasing data weaken collaboration?” Not really, indeed Steve Ritz: “The Fermi collaboration became even stronger after the public data release.” and a lot of additional evidence from other surveys.


Timeline

2011

2013

2012

2014

2015

2016

2017

2018

2019

L1 H2 H1

S7

Phase 1: First Detections (early date)

Phase 2A: Immediate Triggers (early date)

Phase 2B: Full Data (early date)

2.5 years

For greater details:See LIGO Data Management Plan, Jan 2011, LIGO-M1000066https://dcc.ligo.org/cgi-bin/DocDB/RetrieveFile?docid=9967

Now

Community Engagement


Open Data Phase 1

1: LIGO will release detection data Optimizing instruments, few detections

All data meaningless without expert knowledge with published detections and important non-detections real-time alerts distributed privately via MOU Whole LSC writes 800-author papers


Open Data Phase 2

2A: Immediate triggers Interoperable with other event streams Follow-up of external triggers Observer decides using LIGO tools Trigger repository for cross-correlation study

Uniform among multi-mission data Can publish with or without LSC review

2B: Release all h[t] with catalog of past events 24 month after Release 2A, proprietary period, 6 month

releases


TransitionWhen Detections Become Ordinary

Transition to Phase 2 triggered by first of: Volume trigger

Based on rate estimates (LIGO-T1000414) 3x10^7 Mpc^3-yr space-time-volume searched for coalescing

double neutron-star systems at a specified false alarm level. Translates to 0.9 years of running at aLIGO design sensitivity.

Detection trigger Plentiful detections: LIGO decides it’s time

Calendar trigger Transition would occur a fixed amount of time after official

aLIGO acceptance of all 3 interferometers. Current proposal results in first bulk release ≥ 2018.


Sketches for LIGO open data


Machine status


When were the machines operating?


Mock data for one eventhttp://www.ligo.org/science/GW100916/


• Likely galaxies shown in Green

• Dashed line 95% confidence

• Dog shape is Canis Major

• This plot was ready in 30 min



LSC Confidential. Please do not forward or copy.



AladinSkymap + WMAP + Optical + Simbad + Veron QSO catalog


Microsoft WorldWide TelescopeSkymap over Fermi sky and constellations

Canis Major

Vela SNR


Event timeline

click event for drilldown

LIGO-G1101181

Outreach


Monitoring, Triggers, Follow-upsAtom and RSS feed technology

25

LIGO-G1101181

Phone Apps

LSST-funded Transient Events App for iPhoneRuns from Skyalert reports of CRTS optical transients


Science Gateways:Ordering data and computing over the web


Citizen Science

Galaxy ZooLintott, Szalay, lots more


Open Data Survey

Please fill in the survey if you haven’t already


Charge to the Breakouts


Breakout Group Constitution

Leader controls the floor

Scribe takes notes of group dicussion Make your scribe public?

Leader presents results in plenary Friday am

If you must float, keep quiet


Charge to each Breakout Group

Summary of what is there now More GW science results Technical objectives and difficulties How LIGO open/interoperable data can help Relevant present/future collaborations/groups

“Broader Community”

Relevant cites/URLs


A. Information Technology

For: rapid alerts, source catalog, full data For data discovery, interoperability,

accessibility, preservation


A. Information Technology

What infrastructure for real-time astronomy with GW triggers? What protocols to push selected triggers to the right places?

What are the right places? Socket, Jabber, email, VOEvent, Skyalert, GCN, ATEL, CBAT ….?

What data formats, software, metadata for GW waveform (strain data)?

How do we share uncertainties in calibration and features in data? Triggers, catalog, full waveform

How can LIGO provide mock data in advance so the broader community can prepare?

What software should LIGO provide with the data release? Find. Read. Metadata. Visualize. Analyze.

How can we achieve data curation and long-term data preservation?


Multi-messenger before, at, after the event Gamma, X, Optical, Radio, neutrino …

B. Smoking Gunfinding the flash or afterglow


B. Smoking Gunfinding the flash or afterglow

What do observers want from LIGO low-latency triggers besides timing, significance, and sky location?

Detailed data analysis and parameter estimation? Auxiliary channels & their meaning?

How do requirements differ between radio, optical, Xray follow-up observers? Coordinated follow up?

Should there be a coordinated network? If so, should LIGO organize it? How can LIGO encourage the broader community to share their results rapidly? How will GW data be used in concert with other transient surveys?

Figures of Merit for follow up? What criteria will observers use to select the triggers to observe? Multiple trigger quality categories?

Should LIGO provide mock data in advance? If so, what? What software should LIGO provide with the data release?

Where to point the telescope? Submitting follow-ups?

What protocols to push selected triggers to the right places? What are the right places? Socket, Jabber, email, VOEvent, Skyalert, GCN, ATEL, CBAT ….?

Broader community What role for medium/small telescopes? How can we utilize an army of citizen scientists? How can the first detections be used to excite and educate the public/K-12 community?


Access to all h(t) and data quality (whole enchilada)

The detected signals (source catalog) Compare to other signal catalogs: numerical relativity

The “might be” signals (trigger catalog)

C. Full Datascience from the strain channel


C. Full Datascience from the strain channel

What would a LIGO source catalog look like? Astronomy Numerical Relativity Detailed data analysis and parameter estimation? How much continuous calibrated strain h(t) around an event is wanted? Auxiliary channels and their meaning?

What if the first detection is from a burst, continuous-wave, or stochastic? What science from mining the catalog of triggers? Full data release

Who wants to do intensive searches of 2-year old data to avoid joining the LSC? How can LIGO communicate known glitches and data quality?

Should LIGO provide mock data in advance? Is http://www.ligo.org/science/GW100916/ enough?

What software should LIGO provide with the data release? Find. Read. Metadata. Visualize. Analyze.

Broader Community How can the first detections be used to excite and educate the public/K-12 community? How can we utilize an army of citizen scientists?


New ideas in physics astronomy etc New combinations of data, computing, citizens Good web interfaces for GW science Avoiding false “discoveries”

D. New searches, New sciencefresh ideas


D. New searches, New sciencefresh ideas

What new searches can be done? Post-Einstein gravity, dark matter, topological universe, high freq

from SMBH, NS glitches, ‘special’ SN, ???

Combined LISA, IceCube, Optical searches Web-based portal for casual searches

Just want to check something …

Broader Who wants to do full searches of 2-year old data to avoid joining

the LSC? How can we utilize an army of citizen scientists? How to avoid finding glitches and claiming GW?


Finally

Take an insert A,B,C,D Have lunch with your group

gravitational wave open data workshop ligoltech/gwodw2011/ 2011 october 27/28

Documents