GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
Pith reviewed 2026-05-13 13:16 UTC · model grok-4.3
The pith
By applying a false-alarm-rate threshold of two per year across four search pipelines, 39 candidate gravitational wave events from compact binary coalescences are identified, with expected contamination below 10 percent.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
We report 39 candidate gravitational wave events from compact binary coalescences observed in the first half of the third observing run. Twenty-six were previously announced through notices and circulars and thirteen are reported here for the first time. The catalog includes binary black hole mergers with total masses from about 14 to 150 solar masses, as well as events with ambiguous component types. This is the first catalog to include systems with significantly asymmetric mass ratios. Eleven of the events have positive effective inspiral spins at 90 percent credibility, with no negative spins observed.
What carries the argument
The set of four search pipelines that each impose a false-alarm-rate threshold of two per year to identify candidate events while bounding the expected contamination fraction below 10 percent.
If this is right
- The range of total masses for unambiguously identified binary black hole mergers now extends up to approximately 150 solar masses.
- Binary systems with significantly asymmetric mass ratios are observed for the first time.
- Eleven events show positive effective inspiral spins under the default prior, with none showing negative spins.
- The rate of detections is consistent with the rate inferred from the previous catalog when the improved sensitivity is taken into account.
Where Pith is reading between the lines
- This expanded sample of events can be used to place tighter constraints on the distribution of black hole masses and spins.
- The events with ambiguous component masses may represent neutron star-black hole binaries, which could be confirmed by future observations or multi-messenger signals.
- Continued operation of the detectors is likely to reveal even more massive or asymmetric systems, further testing models of stellar evolution and binary formation.
Load-bearing premise
The background noise models used by the four search pipelines accurately represent the non-Gaussian and non-stationary properties of the detector noise.
What would settle it
A reanalysis of the data using different background estimation methods that finds substantially more than four of the 39 candidates to be consistent with noise fluctuations would indicate that the contamination fraction exceeds 10 percent.
read the original abstract
We report on gravitational wave discoveries from compact binary coalescences detected by Advanced LIGO and Advanced Virgo in the first half of the third observing run (O3a) between 1 April 2019 15:00 UTC and 1 October 2019 15:00. By imposing a false-alarm-rate threshold of two per year in each of the four search pipelines that constitute our search, we present 39 candidate gravitational wave events. At this threshold, we expect a contamination fraction of less than 10%. Of these, 26 candidate events were reported previously in near real-time through GCN Notices and Circulars; 13 are reported here for the first time. The catalog contains events whose sources are black hole binary mergers up to a redshift of ~0.8, as well as events whose components could not be unambiguously identified as black holes or neutron stars. For the latter group, we are unable to determine the nature based on estimates of the component masses and spins from gravitational wave data alone. The range of candidate events which are unambiguously identified as binary black holes (both objects $\geq 3~M_\odot$) is increased compared to GWTC-1, with total masses from $\sim 14~M_\odot$ for GW190924_021846 to $\sim 150~M_\odot$ for GW190521. For the first time, this catalog includes binary systems with significantly asymmetric mass ratios, which had not been observed in data taken before April 2019. We also find that 11 of the 39 events detected since April 2019 have positive effective inspiral spins under our default prior (at 90% credibility), while none exhibit negative effective inspiral spin. Given the increased sensitivity of Advanced LIGO and Advanced Virgo, the detection of 39 candidate events in ~26 weeks of data (~1.5 per week) is consistent with GWTC-1.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper reports the GWTC-2 catalog of 39 candidate gravitational wave events from compact binary coalescences detected by LIGO and Virgo during O3a (April–October 2019). Using a false-alarm-rate threshold of two per year across four independent search pipelines, the authors bound expected contamination below 10%, present 13 new events, characterize binary black hole mergers up to redshift ~0.8 and systems with ambiguous component masses, and note the first detections of significantly asymmetric mass ratios plus a preference for positive effective inspiral spins.
Significance. If the background models and FAR estimates hold, this catalog substantially increases the sample of observed compact binary coalescences, enabling improved population inferences, tests of formation channels, and constraints on spin distributions. The multi-pipeline consistency, public data releases, and explicit contamination bound are strengths that support reproducibility and downstream analyses.
minor comments (2)
- [Abstract] Abstract: the statement that 11 events have positive effective inspiral spin at 90% credibility would benefit from an explicit cross-reference to the table or section listing the individual posterior summaries and the default prior choice.
- [Search methodology] The description of the four search pipelines and their background estimation methods should include a brief statement on how the time-shift procedure accounts for non-stationary noise correlations between detectors.
Simulated Author's Rebuttal
We thank the referee for their positive review of our manuscript and their recommendation to accept. We are pleased that the referee recognizes the value of the GWTC-2 catalog for population studies, formation channel tests, and spin constraints, as well as the strengths of our multi-pipeline approach, contamination bound, and public data releases.
Circularity Check
No significant circularity identified
full rationale
This is an observational catalog paper reporting counts and parameter estimates of gravitational-wave events from LIGO/Virgo data. The central result (39 candidates above a FAR threshold of 2/yr with <10% expected contamination) follows directly from applying four independent search pipelines to the strain data, using time-shift background estimation and standard waveform templates. No derivation step reduces by the paper's own equations to a fitted parameter or self-citation; background models are constructed externally to the signal hypotheses, and prior GWTC-1 citations supply only contextual comparison rather than load-bearing justification for the new detections.
Axiom & Free-Parameter Ledger
free parameters (1)
- false_alarm_rate_threshold
axioms (2)
- domain assumption General relativity provides accurate waveform models for compact binary coalescences across the observed mass and spin range
- domain assumption Detector noise can be characterized sufficiently well by the background estimation procedures to yield reliable false-alarm rates
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Reference graph
Works this paper leans on
-
[1]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Observation of Gravitational Waves from a Binary Black Hole Merger, Phys. Rev. Lett. 116, 061102 (2016), arXiv:1602.03837 [gr-qc]
work page internal anchor Pith review Pith/arXiv arXiv 2016
-
[2]
J. Aasi et al. (LIGO Scientific Collaboration), Ad- vanced LIGO, Class. Quantum Grav.32, 074001 (2015), arXiv:1411.4547 [gr-qc]
work page internal anchor Pith review Pith/arXiv arXiv 2015
-
[3]
Advanced Virgo: a 2nd generation interferometric gravitational wave detector
F. Acernese et al. (Virgo Collaboration), Advanced Virgo: a second-generation interferometric gravita- tional wave detector, Class. Quantum Grav. 32, 024001 (2015), arXiv:1408.3978 [gr-qc]
work page internal anchor Pith review Pith/arXiv arXiv 2015
-
[4]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW151226: Observation of Grav- itational Waves from a 22-Solar-Mass Binary Black Hole Coalescence, Phys. Rev. Lett. 116, 241103 (2016), arXiv:1606.04855 [gr-qc]
work page Pith review arXiv 2016
-
[5]
B. P. Abbott et al. (LIGO Scientific Collabora- tion, Virgo Collaboration), GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2, Phys. Rev. Lett. 118, 221101 (2017), [Erratum: Phys. Rev. Lett. 121, 129901 (2018)], arXiv:1706.01812 [gr-qc]
work page Pith review arXiv 2017
-
[6]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW170608: Observation of a 19- solar-mass Binary Black Hole Coalescence, Astrophys. J. 851, L35 (2017), arXiv:1711.05578 [astro-ph.HE]
work page Pith review arXiv 2017
-
[7]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence, Phys. Rev. Lett. 119, 141101 (2017), arXiv:1709.09660 [gr-qc]
work page Pith review arXiv 2017
-
[8]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Ob- served by LIGO and Virgo during the First and Sec- ond Observing Runs, Phys. Rev. X 9, 031040 (2019), arXiv:1811.12907 [astro-ph.HE]
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[9]
B. P. Abbott et al. (LIGO Scientific Collabora- tion, Virgo Collaboration), Tests of general relativ- ity with GW150914, Phys. Rev. Lett. 116, 221101 (2016), [Erratum: Phys. Rev. Lett. 121, 129902 (2018)], arXiv:1602.03841 [gr-qc]
work page Pith review arXiv 2016
-
[10]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Tests of General Relativity with the Binary Black Hole Signals from the LIGO-Virgo Catalog GWTC-1, Phys. Rev. D 100, 104036 (2019), arXiv:1903.04467 [gr-qc]
work page internal anchor Pith review arXiv 2019
- [11]
-
[12]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW170817: Observation of Grav- itational Waves from a Binary Neutron Star Inspiral, Phys. Rev. Lett. 119, 161101 (2017), arXiv:1710.05832 [gr-qc]
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[13]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration, Fermi-GBM, INTEGRAL), Gravi- tational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A, Astrophys. J. 848, L13 (2017), arXiv:1710.05834 [astro-ph.HE]
work page Pith review arXiv 2017
-
[14]
B. P. Abbott et al. (LIGO Scientific Collabora- tion, Virgo Collaboration, Fermi GBM, INTEGRAL, IceCube, AstroSat Cadmium Zinc Telluride Imager Team, IPN, Insight-Hxmt, ANTARES, Swift, AGILE Team, 1M2H Team, Dark Energy Camera GW-EM, DES, DLT40, GRAWITA, Fermi-LAT, ATCA, ASKAP, Las Cumbres Observatory Group, OzGrav, DWF (Deeper Wider Faster Program), AST3,...
work page Pith review arXiv 2017
-
[15]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW170817: Measurements of neutron star radii and equation of state, Phys. Rev. Lett. 121, 161101 (2018), arXiv:1805.11581 [gr-qc]
work page Pith review arXiv 2018
- [16]
-
[17]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration, 1M2H, Dark Energy Camera GW- E, DES, DLT40, Las Cumbres Observatory, VIN- ROUGE, MASTER), A gravitational-wave standard siren measurement of the Hubble constant, Nature 551, 85 (2017), arXiv:1710.05835 [astro-ph.CO]
work page Pith review arXiv 2017
- [18]
-
[19]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Tests of General Relativity with GW170817, Phys. Rev. Lett. 123, 011102 (2019), arXiv:1811.00364 [gr-qc]
work page Pith review arXiv 2019
-
[20]
Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo
R. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Open data from the first and second ob- serving runs of Advanced LIGO and Advanced Virgo (2019), arXiv:1912.11716 [gr-qc]
work page internal anchor Pith review arXiv 2019
-
[21]
A. Trovato (LIGO Scientific Collaboration, Virgo Col- laboration), GWOSC: Gravitational Wave Open Science Center, Proceedings, The New Era of Multi-Messenger Astrophysics (ASTERICS 2019): Groningen, Nether- lands, March 25-29, 2019 , PoS Asterics2019, 082 (2020)
work page 2019
-
[22]
B. Zackay, L. Dai, T. Venumadhav, J. Roulet, and M. Zaldarriaga, Detecting Gravitational Waves With Disparate Detector Responses: Two New Binary Black Hole Mergers (2019), arXiv:1910.09528 [astro-ph.HE]. 45
-
[23]
T. Venumadhav, B. Zackay, J. Roulet, L. Dai, and M. Zaldarriaga, New binary black hole mergers in the second observing run of Advanced LIGO and Advanced Virgo, Phys. Rev. D 101, 083030 (2020), arXiv:1904.07214 [astro-ph.HE]
-
[24]
T. Venumadhav, B. Zackay, J. Roulet, L. Dai, and M. Zaldarriaga, New search pipeline for compact bi- nary mergers: Results for binary black holes in the first observing run of Advanced LIGO, Phys. Rev. D 100, 023011 (2019), arXiv:1902.10341 [astro-ph.IM]
-
[25]
A Highly Spinning and Aligned Binary Black Hole Merger in the Advanced LIGO First Observing Run
B. Zackay, T. Venumadhav, L. Dai, J. Roulet, and M. Zaldarriaga, Highly spinning and aligned binary black hole merger in the Advanced LIGO first observing run, Phys. Rev. D100, 023007 (2019), arXiv:1902.10331 [astro-ph.HE]
work page Pith review arXiv 2019
-
[26]
A. H. Nitz, C. Capano, A. B. Nielsen, S. Reyes, R. White, D. A. Brown, and B. Krishnan, 1-OGC: The first open gravitational-wave catalog of binary mergers from analysis of public Advanced LIGO data, Astro- phys. J. 872, 195 (2019), arXiv:1811.01921 [gr-qc]
work page Pith review arXiv 2019
-
[27]
A. H. Nitz, T. Dent, G. S. Davies, S. Kumar, C. D. Capano, I. Harry, S. Mozzon, L. Nuttall, A. Lundgren, and M. T´ apai, 2-OGC: Open Gravitational-wave Cata- log of binary mergers from analysis of public Advanced LIGO and Virgo data, Astrophys. J. 891, 123 (2019), arXiv:1910.05331 [astro-ph.HE]
-
[28]
Sub-threshold binary neutron star search in Advanced LIGO's first observing run
R. Magee et al. , Sub-threshold Binary Neutron Star Search in Advanced LIGO’s First Observing Run, As- trophys. J. 878, L17 (2019), arXiv:1901.09884 [gr-qc]
work page Pith review arXiv 2019
- [29]
- [30]
-
[31]
LIGO Scientific Collaboration and Virgo Collaboration, GCN 25871, 25829, 25753, 25503, 25497, 25324, 25187, 25164, 25115, 25012, 24998, 24950, 24922, 24717, 24632, 24621, 24598, 24570, 24522, 24503, 24377, 24237, 24168, 24141, 24098, 24069 (2019)
work page 2019
- [32]
-
[33]
R. Abbott et al. (LIGO Scientific, Virgo), GW190814: Gravitational Waves from the Coalescence of a 23 Solar Mass Black Hole with a 2.6 Solar Mass Compact Object, Astrophys. J. 896, L44 (2020), arXiv:2006.12611 [astro- ph.HE]
work page internal anchor Pith review arXiv 2020
-
[34]
Abbottet al.(LIGO Scientific, Virgo), Phys
R. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW190521: A Binary Black Hole Merger with a Total Mass of 150 M⊙, Phys. Rev. Lett. 125, 101102 (2020), arXiv:2009.01075 [gr-qc]
-
[35]
R. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Properties and astrophysical impli- cations of the 150 M⊙ binary black hole merger GW190521, Astrophys. J. Lett. 900, L13 (2020), arXiv:2009.01190 [astro-ph.HE]
-
[36]
LIGO and V. Collaborations, Tests of General Rel- ativity with Binary Black Holes from the second LIGO–Virgo Gravitational-Wave Transient Catalog, LIGO DCC P2000091, 1 (2020)
work page 2020
-
[37]
LIGO and V. Collaborations, Population properties of compact objects from the second LIGO–Virgo Gravitational-Wave Transient Catalog, LIGO DCC P2000077, 1 (2020)
work page 2020
-
[39]
G. Vajente, E. K. Gustafson, and D. H. Reitze, Chapter three - precision interferometry for gravitational wave detection: Current status and future trends (Academic Press, 2019) pp. 75 – 148
work page 2019
-
[40]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Binary Black Hole Mergers in the first Advanced LIGO Observing Run, Phys. Rev. X 6, 041015 (2016), [Erratum: Phys. Rev. X 8, 039903 (2018)], arXiv:1606.04856 [gr-qc]
work page Pith review arXiv 2016
-
[41]
A. Buikema et al. (aLIGO), Sensitivity and Perfor- mance of the Advanced LIGO Detectors in the Third Observing Run, Phys. Rev. D 102, 062003 (2020), arXiv:2008.01301 [astro-ph.IM]
-
[42]
J. C. Driggers et al. (LIGO Scientific Collaboration), Improving astrophysical parameter estimation via of- fline noise subtraction for Advanced LIGO, Phys. Rev. D 99, 042001 (2019), arXiv:1806.00532 [astro-ph.IM]
work page Pith review arXiv 2019
-
[43]
G. Billingsley, H. Yamamoto, and L. Zhang, Charac- terization of Advanced LIGO Core Optics, Proceedings American Society for Precision Engineering (ASPE) 2017 Spring Topical Meeting Volume 66 , 78 (2017)
work page 2017
-
[44]
R. Dolesi, M. Hueller, D. Nicolodi, D. Tombolato, S. Vi- tale, P. J. Wass, W. J. Weber, M. Evans, P. Fritschel, R. Weiss, J. H. Gundlach, C. A. Hagedorn, S. Schlam- minger, G. Ciani, and A. Cavalleri, Brownian force noise from molecular collisions and the sensitivity of ad- vanced gravitational wave observatories, Phys. Rev. D 84, 063007 (2011)
work page 2011
- [45]
-
[46]
M. Evans, S. Gras, P. Fritschel, J. Miller, L. Bar- sotti, D. Martynov, A. Brooks, D. Coyne, R. Ab- bott, R. X. Adhikari, K. Arai, R. Bork, B. Kells, J. Rollins, N. Smith-Lefebvre, G. Vajente, H. Ya- mamoto, C. Adams, S. Aston, J. Betzweiser, V. Frolov, A. Mullavey, A. Pele, J. Romie, M. Thomas, K. Thorne, S. Dwyer, K. Izumi, K. Kawabe, D. Sigg, R. Derosa...
work page internal anchor Pith review arXiv 2015
-
[47]
Suppress- ing parametric instabilities in LIGO using low-noise acoustic mode dampers,
S. Biscans, S. Gras, C. D. Blair, J. Driggers, M. Evans, P. Fritschel, T. Hardwick, and G. Mansell, Suppressing parametric instabilities in LIGO using low-noise acous- tic mode dampers, Phys. Rev. D 100, 122003 (2019), arXiv:1909.07805 [physics.app-ph]
-
[48]
R. Schnabel, N. Mavalvala, D. E. Mcclelland, and P. K. Lam, Quantum metrology for gravitational wave astron- omy, Nature Commun. 1, 121 (2010)
work page 2010
-
[49]
L. Barsotti, J. Harms, and R. Schnabel, Squeezed vac- uum states of light for gravitational wave detectors, Rept. Prog. Phys. 82, 016905 (2019)
work page 2019
-
[50]
M. Tse et al., Quantum-Enhanced Advanced LIGO De- tectors in the Era of Gravitational-Wave Astronomy, 46 Phys. Rev. Lett. 123, 231107 (2019)
work page 2019
-
[51]
J. Abadie et al. (LIGO Scientific), A Gravitational wave observatory operating beyond the quantum shot-noise limit: Squeezed light in application, Nature Phys. 7, 962 (2011), arXiv:1109.2295 [quant-ph]
work page Pith review arXiv 2011
-
[52]
First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory
H. Grote, K. Danzmann, K. L. Dooley, R. Schnabel, J. Slutsky, and H. Vahlbruch, First Long-Term Appli- cation of Squeezed States of Light in a Gravitational- Wave Observatory, Phys. Rev. Lett.110, 181101 (2013), arXiv:1302.2188 [physics.ins-det]
work page Pith review arXiv 2013
-
[53]
D. J. Ottaway, P. Fritschel, and S. J. Waldman, Impact of upconverted scattered light on advanced interfero- metric gravitational wave detectors, Opt. Express 20, 8329 (2012)
work page 2012
-
[54]
D. Aisa et al. , The Advanced Virgo monolithic fused silica suspension, Proceedings, 13th Pisa Meeting on Advanced Detectors : Frontier Detectors for Frontier Physics (FDFP 2015): La Biodola, Isola d’Elba, Italy, 2015, Nucl. Instrum. Meth. A824 (2016)
work page 2015
-
[55]
L. Naticchioni (Virgo Collaboration), The payloads of Advanced Virgo: current status and upgrades, Proceed- ings, 12th Edoardo Amaldi Conference on Gravitational Waves (Amaldi 12): Pasadena, CA, USA, 2017 , J. Phys. Conf. Ser. 957, 012002 (2018)
work page 2017
-
[56]
M. Blom et al. , Vertical and Horizontal Seismic Isola- tion Performance of the Advanced Virgo External In- jection Bench Seismic Attenuation System, Proceedings, 13th International Conference on Topics in Astroparti- cle and Underground Physics (TAUP 2013): Asilomar, CA, USA, 2013 , Phys. Procedia 61 (2015)
work page 2013
-
[57]
M. Blom, Seismic Attenuation for Advanced Virgo: Vibration Isolation for the External Injection Bench, Ph.D. Thesis, Nikhef (2015)
work page 2015
-
[59]
A. Rocchi et al. , Thermal effects and their compen- sation in Advanced Virgo, Proceedings, 9th Edoardo Amaldi Conference on Gravitational Waves (Amaldi 9): Cardiff, United Kingdom, 2011, J. Phys. Conf. Ser.363, 012016 (2012)
work page 2011
-
[60]
I. Nardecchia et al., Integrated dynamical thermal com- pensation techniques for Advanced Virgo, in Proceed- ings, 2nd GRavitational-waves Science and technology Simposium (GRASS 2019): Padova, Italy, 2019 (2020)
work page 2019
-
[61]
F. Acernese et al. (Virgo Collaboration), Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light, Phys. Rev. Lett. 123, 231108 (2019)
work page 2019
-
[62]
H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schn- abel, Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Pho- toelectric Quantum Efficiency, Phys. Rev. Lett. 117, 110801 (2016)
work page 2016
- [63]
- [64]
-
[65]
N. Christensen, P. Shawhan, and G. Gonzalez (LIGO Scientific), Vetoes for inspiral triggers in LIGO data, Class. Quantum Grav. 21, S1747 (2004), arXiv:gr- qc/0403114
-
[66]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), Characterization of transient noise in Advanced LIGO relevant to gravitational wave signal GW150914, Class. Quantum Grav. 33, 134001 (2016), arXiv:1602.03844 [gr-qc]
work page Pith review arXiv 2016
-
[67]
Reconstructing the calibrated strain signal in the Advanced LIGO detectors
A. Viets et al., Reconstructing the calibrated strain sig- nal in the Advanced LIGO detectors, Class. Quant. Grav. 35, 095015 (2018), arXiv:1710.09973 [astro- ph.IM]
work page Pith review arXiv 2018
-
[68]
F. Acernese et al. (Virgo), Calibration of Advanced Virgo and Reconstruction of the Gravitational Wave Signalh(t) during the Observing Run O2, Class. Quan- tum Grav. 35, 205004 (2018), arXiv:1807.03275 [gr-qc]
-
[69]
B. P. Abbott et al. (LIGO Scientific Collaboration), Cal- ibration of the Advanced LIGO detectors for the discov- ery of the binary black-hole merger GW150914, Phys. Rev. D 95, 062003 (2017), arXiv:1602.03845 [gr-qc]
work page Pith review arXiv 2017
-
[70]
D. Tuyenbayev et al. , Improving LIGO calibration ac- curacy by tracking and compensating for slow tempo- ral variations, Class. Quant. Grav. 34, 015002 (2017), arXiv:1608.05134 [astro-ph.IM]
work page internal anchor Pith review arXiv 2017
-
[71]
The Advanced LIGO Photon Calibrators
S. Karki et al. , The Advanced LIGO Photon Cal- ibrators, Rev. Sci. Instrum. 87, 114503 (2016), arXiv:1608.05055 [astro-ph.IM]
work page Pith review arXiv 2016
-
[72]
D. Bhattacharjee, Y. Lecoeuche, S. Karki, J. Bet- zwieser, V. Bossilkov, S. Kandhasamy, E. Payne, and R. Savage, Fiducial displacements with improved accu- racy for the global network of gravitational wave detec- tors, Class. Quantum Grav. 10.1088/1361-6382/aba9ed (2020), arXiv:2006.00130 [astro-ph.IM]
-
[73]
2021 a , Classical and Quantum Gravity, 38, 075007
D. Estevez, P. Lagabbe, A. Masserot, L. Rolland, M. Seglar-Arroyo, and D. Verkindt, The Advanced Virgo Photon Calibrators (2020), arXiv:2009.08103 [astro-ph.IM]
-
[74]
L. Sun et al. , Characterization of systematic error in Advanced LIGO calibration, Class. Quant. Grav. 37, 225008 (2020), arXiv:2005.02531 [astro-ph.IM]
-
[75]
B. P. Abbott et al. (LIGO Scientific Collaboration, Virgo Collaboration), GW150914: First results from the search for binary black hole coalescence with Advanced LIGO, Phys. Rev. D 93, 122003 (2016), arXiv:1602.03839 [gr-qc]
work page Pith review arXiv 2016
-
[76]
S. Vitale, W. Del Pozzo, T. G. F. Li, C. Van Den Broeck, I. Mandel, B. Aylott, and J. Veitch, Effect of calibra- tion errors on Bayesian parameter estimation for grav- itational wave signals from inspiral binary systems in the Advanced Detectors era, Phys. Rev. D 85, 064034 (2012), arXiv:1111.3044 [gr-qc]
work page Pith review arXiv 2012
-
[77]
D. Estevez, B. Mours, L. Rolland, and D.Verkindt, On- line h(t) reconstruction for Virgo O3 data: start of O3 , Tech. Rep. VIR-0652B-19 (Virgo, 2019)
work page 2019
-
[78]
Improving the Sensitivity of Advanced LIGO Using Noise Subtraction
D. Davis, T. J. Massinger, A. P. Lundgren, J. C. Driggers, A. L. Urban, and L. K. Nuttall, Improving the Sensitivity of Advanced LIGO Using Noise Sub- traction, Class. Quantum Grav. 36, 055011 (2019), arXiv:1809.05348 [astro-ph.IM]
work page Pith review arXiv 2019
-
[79]
A. Viets and M. Wade, CSubtracting Narrow-band Noise from LIGO Strain Data in the Third Observing Run , Tech. Rep. T2100058 (LIGO DCC, 2021)
work page 2021
-
[80]
G. Vajente, Y. Huang, M. Isi, J. C. Driggers, J. S. Kissel, M. J. Szczepanczyk, and S. Vitale, Machine-learning nonstationary noise out of gravitational-wave detectors, 47 Phys. Rev. D 101, 042003 (2020), arXiv:1911.09083 [gr- qc]
-
[81]
L. Rolland, M. Seglar-Arroyo, and D. Verkindt, Repro- cessing of h(t) for the last two weeks of O3a , Tech. Rep. VIR-1201A-19 (Virgo, 2019)
work page 2019
-
[82]
(LIGO Instrument Science Collaboration) 2021 Class
D. Davis et al. , LIGO Detector Characterization in the Second and Third Observing Runs (2021), arXiv:2101.11673 [astro-ph.IM]
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