TITLE:   GCN CIRCULAR
NUMBER:  24474
SUBJECT: LIGO/Virgo S190510g: DESGW counterpart candidate (desgw-190510a)
DATE:    19/05/11 08:42:33 GMT
FROM:    James Annis at Fermilab  <annis@fnal.gov>

LIGO/Virgo S190510g: DESGW counterpart candidate (desgw-190510a)

Jim Annis for the DESGW collaboration

We report a candidate counterpart to the binary neutron star merger S190510g reported by LIGO/VIRGO Collaboration (GCN Circular No. 24442, updated GCN Circular No. 24448). The region was imaged by DECam on the night of 2019 May 10 (GCN Circular No. 24467).  The candidate was identified by visual inspection of 566 galaxies nearby galaxies within the 50% localization probability region of the merger. The visual inspection compared the new images with deep pre-existing imaging data obtained by the Dark Energy Survey. The transient appears in our g,r,z images.

Transient:  desgw-190510a
Coordinates:  91.52679,  -35.54160  ( 6:06:06.429,-35:32:29.77 )
g mag: 22.5 +/- 0.2
r mag: 20.9 +/- 0.05
z mag: 20.7 +/- 0.1
These magnitudes are as observed, uncorrected for reddening.

Host galaxy:  2MASS06060625-3532351
Coordinates:  91.52605,   -35.54311  ( 6:06:06.252,-35:32:35.20 )
Radius of galaxy:  6.6’
J mag: 14.64
Redshift: 0.089 (2MPZ photo-z)

DESGW collaboration:
Sahar Allam (Fermilab),  James Annis (Fermilab),  Iair Arcavi (Tel Aviv University),  Paulo Barchi (INPE/Brazil),  Keith Bechtol (LSST),  Federico Berlfein (Brandeis U),  Antonio Bernardo (IAG-USP/Brazil),  Dillon Brout (University of Pennsylvania),  Robert Butler (Indiana University),  Melissa Butner,  (Fermilab),  Annalisa Calamida (STScI), Hsin-Yu Chen (Harvard U),  Chris Conselice (University of Nottingham),  Carlos Contreras (STScI),  Jeff Cooke (Swinburne University),  Chris D’Andrea (University of Pennsylvania),  Tamara Davis (UQ/Australia),  Reinaldo de Carvalho (NAT - Universidade Cruzeiro do Sul/Universidade Cidade de Sao Paulo),  H. Thomas Diehl (Fermilab),  Zoheyr Doctor (U Chicago),  Alex Drlica-Wagner (Fermilab),  Maria Drout (U Toronto),  Maya Fishbach (U Chicago),  Francisco Forster (U de Chile/Chile),  Ryan Foley (UCSC),  Joshua Frieman (Fermilab & University of Chicago),  Chris Frohmaier (University of Portsmouth),  Ori Fox (STScI), Alyssa Garcia (Brandeis U),  Juan Garcia-Bellido (Universidad Autonoma de Madrid),  Mandeep Gill (SLAC/Stanford U),  Robert Gruendl (NCSA),  Will Hartley (University College London),  Kenneth Herner (Fermilab),  Daniel Holz (U Chicago),  Jorge Horvath (IAG-USP/Brazil),  D. Andrew Howell (Las Cumbres Observatory),  Richard Kessler (University of Chicago),  Charles Kilpatrick (UCSC),  Nikolay Kuropatkin (Fermilab),  Ofer Lahav (University College London),  Huan Lin (Fermilab),  Andrew Lundgren (Portsmouth),  Martin Makler (CBPF/Brazil),  Curtis McCully (Las Cumbres Observatory),  Robert Morgan (University of Wisconsin-Madison),  Gautham Narayan (STScI),  Eric Neilsen (Fermilab),  Robert Nichol (University of Portsmouth), Antonella Palmese (Fermilab),  Francisco Paz-Chinchon (NCSA & UIUC),  Maria Pereira (Brandeis University),  Sandro Rembold (UFSM/Brazil),  Armin Rest (STScI & JHU),  Livia Rocha (IAG-USP/Brazil),  Russell Ryan (STScI), Masao Sako (University of Pennsylvania),  Samir Salim (Indiana University),  David Sand (U of Arizona),  Daniel Scolnic (Duke University),  J. Allyn Smith (Austin Peay State University),  Mathew Smith (University of Southampton), Marcelle Soares-Santos (Brandeis U), Lou Strolger (STScI), Riccardo Sturani (UFRN/Brazil),  Mark Sullivan (University of Southampton),  Masaomi Tanaka (NAOJ/Japan),  Nozomu Tominaga (Konan U/Japan),  Douglas Tucker (Fermilab),  Yousuke Utsumi (Stanford U),  Stefano Valenti (UC Davis),  Kathy Vivas (NOAO/CTIO),  Alistair Walker (NOAO/CTIO),  Sara Webb (Swinburne University), Matt Wiesner (Benedictine University),  Brian Yanny (Fermilab),  Michitoshi Yoshida (NAOJ/Japan),  Alfredo Zenteno (NOAO/CTIO), Luidhy Santana-Silva (Valongo Observatory)

This project used data obtained with the Dark Energy Camera (DECam), which was constructed by the Dark Energy Survey collaboration, and draws on upon data as distributed by the Science Data Archive at NOAO. NOAO is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation.