# The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. I. Dark Energy Camera Discovery of the Optical Counterpart

@article{SoaresSantos2017TheEC,
title={The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. I. Dark Energy Camera Discovery of the Optical Counterpart},
author={Marcelle Soares-Santos and Daniel E. Holz and James T. Annis and Ryan Chornock and Ken Herner and Edo Berger and Dillon J. Brout and H. Y. Chen and Richard Kessler and Masao Sako and Sahar Allam and Douglas L. Tucker and Robert E. Butler and Antonella Palmese and Zoheyr Doctor and H. Thomas Diehl and Joshua A. Frieman and Brian Yanny and H. Lin and Dan Scolnic and Philip S. Cowperthwaite and Eric H. Neilsen and John Marriner and Nikolay Kuropatkin and William G. Hartley and F. Paz-Chinch'on and Kate D. Alexander and Eduardo Balbinot and Peter K. Blanchard and D. A. Brown and Jeffrey L. Carlin and Christopher J. Conselice and Erika Cook and Alex Drlica-Wagner and Maria R. Drout and Florence Durret and Tarraneh Eftekhari and Benjamin Farr and David A. Finley and Ryan J. Foley and Wen-fai Fong and Christopher L. Fryer and Juan Garc'ia-Bellido and Mandeep S. S. Gill and Robert A. Gruendl and Chad Hanna and Daniel Kasen and T. S. Li and Paulo A. A. Lopes and Antonio C. Lourencco and Raffaella Margutti and Jennifer L. Marshall and Thomas Matheson and Gustavo E. Medina and Brian D. Metzger and Ricardo R. Mu{\~n}oz and J. Muir and Matt Nicholl and Eliot Quataert and Armin Rest and Marcus Sauseda and David J. Schlegel and Lucas F. Secco and Flavia Sobreira and Albert Stebbins and V. Ashley Villar and Alistair R. Walker and W. C. Iii Wester and Peter K. G. Williams and A. Zenteno and Y. Zhang and Timothy M. C. Abbott and Filipe B. Abdalla and Manda Banerji and Keith C. Bechtol and Aur{\'e}lien Benoit-L{\'e}vy and Emmanuel Bertin and David Brooks and Elizabeth Buckley-Geer and David L. Burke and Aurelio Carnero Rosell and Matias Carrasco Kind and Jorge Carretero and Francisco J. Castander and Mart{\'i}n Crocce and Carlos E. Cunha and Chris D'Andrea and Luiz Nicolaci da Costa and C. Davis and Shantanu Desai and J. P. Dietrich and Peter Doel and T. F. Eifler and Enrique Fern{\'a}ndez and Brenna L. Flaugher and Pablo Fosalba and Enrique Gazta{\~n}aga and David W. Gerdes and T. Giannantonio and Daniel A. Goldstein and Daniel Gruen and Julia Gschwend and Gaston R. Guti{\'e}rrez and Klaus Honscheid and B. Jain and David J. James and Tesla E. Jeltema and M. W. G. Johnson and M. D. Johnson and Stephen Kent and E. Krause and Richard G. Kron and Kyler W. Kuehn and Stephen E. Kuhlmann and Ofer Lahav and Marcos Lima and Marcio A. G. Maia and M March and Richard G. McMahon and Felipe Menanteau and Ramon Miquel and Joseph J. Mohr and Robert C. Nichol and Brian Nord and R. L. C. Ogando and Don Petravick and Andreas Alejandro Plazas and A. K. Romer and Aaron Roodman and Eli S. Rykoff and Eusebio S{\'a}nchez and Victor E. Scarpine and Michael S. Schubnell and Ignacio Sevilla-Noarbe and M. Smith and R. C. Smith and Eric Suchyta and Mollye E. C. Swanson and Gregory G. Tarl{\'e} and D. Thomas and R. C. Thomas and Michael Troxel and Vinu Vikram and Risa H. Wechsler and Jochen Weller},
journal={arXiv: High Energy Astrophysical Phenomena},
year={2017}
}
• Published 16 October 2017
• Physics
• arXiv: High Energy Astrophysical Phenomena
We present the Dark Energy Camera (DECam) discovery of the optical counterpart of the first binary neutron star merger detected through gravitational wave emission, GW170817. Our observations commenced 10.5 hours post-merger, as soon as the localization region became accessible from Chile. We imaged 70 deg$^2$ in the $i$ and $z$ bands, covering 93\% of the initial integrated localization probability, to a depth necessary to identify likely optical counterparts (e.g., a kilonova). At 11.4 hours…
281 Citations

## Figures and Tables from this paper

### Afterglow Light Curves of Nonrelativistic Ejecta Mass in a Stratified Circumstellar Medium

• Physics
• 2020
We present the afterglow light curves produced by the deceleration of a nonrelativistic ejecta mass in a stratified circumstellar medium with a density profile n(r) ∝ r−k with k = 0, 1, 1.5, 2, and

### The key role of magnetic fields in binary neutron star mergers

The first multimessenger observation of a binary neutron star (BNS) merger in August 2017 demonstrated the huge scientific potential of these extraordinary events. This breakthrough led to a number

### SOAR/Goodman Spectroscopic Assessment of Candidate Counterparts of the LIGO/Virgo Event GW190814

• Physics
The Astrophysical Journal
• 2022
On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star–black hole merger (NSBH), the first ever identified. An extensive search for an optical

### A Standard Siren Measurement of the Hubble Constant from GW170817 without the Electromagnetic Counterpart

• Physics
The Astrophysical Journal
• 2019
We perform a statistical standard siren analysis of GW170817. Our analysis does not utilize knowledge of NGC 4993 as the unique host galaxy of the optical counterpart to GW170817. Instead, we

### The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. VIII. A Comparison to Cosmological Short-duration Gamma-Ray Bursts

• Physics
• 2017
We present a comprehensive comparison of the properties of the radio through X-ray counterpart of GW170817 and the properties of short-duration gamma-ray bursts (GRBs). For this effort, we utilize a

### Where Binary Neutron Stars Merge: Predictions from IllustrisTNG

• Physics
• 2021
The rate and location of binary neutron star (BNS) mergers are determined by a combination of the star formation history and the delay-time distribution (DTD) function. In this paper, we couple the

### The host galaxies of double compact objects merging in the local Universe

• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
We investigate the host galaxies of compact objects merging in the local Universe, by combining the results of binary population-synthesis simulations with the Illustris cosmological box. Double

### Binary Neutron Star and Short Gamma-Ray Burst Simulations in Light of GW170817

In the dawn of the multi-messenger era of gravitational wave astronomy, which was marked by the first ever coincident detection of gravitational waves and electromagnetic radiation, it is important

### Progenitors of gravitational wave mergers: binary evolution with the stellar grid-based code ComBinE

• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
The first gravitational wave detections of mergers between black holes and neutron stars represent a remarkable new regime of high-energy transient astrophysics. The signals observed with LIGO-Virgo

### The impact of peculiar velocities on the estimation of the Hubble constant from gravitational wave standard sirens

• Physics
Monthly Notices of the Royal Astronomical Society
• 2020
In this work, we investigate the systematic uncertainties that arise from the calculation of the peculiar velocity when estimating the Hubble constant (H0) from gravitational wave standard sirens.

## References

SHOWING 1-3 OF 3 REFERENCES

### The Pan-STARRS1 Surveys

• Geology
• 2016
Pan-STARRS1 has carried out a set of distinct synoptic imaging sky surveys including the $3\pi$ Steradian Survey and the Medium Deep Survey in 5 bands ($grizy_{P1}$). The mean 5$\sigma$ point source

### Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology

• Physics, Geology
• 2018
We describe the creation, content, and validation of the Dark Energy Survey (DES) internal year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses. The Y1A1 GOLD data set

### Determining the Hubble constant from gravitational wave observations of merging compact binaries

• Physics
• 2013
Recent observations have accumulated compelling evidence that some short gamma-ray bursts (SGRBs) are associated with the mergers of neutron star (NS) binaries. This would indicate that the SGRB