2016ApJ...828L..16D

Query : 2016ApJ...828L..16D

2016ApJ...828L..16D - Astrophys. J., 828, L16-L16 (2016/September-2)

GW150914: first search for the electromagnetic counterpart of a gravitational-wave event by the TOROS collaboration.

DIAZ M.C., BEROIZ M., PENUELA T., MACRI L.M., OELKERS R.J., YUAN W., GARCIA LAMBAS D., CABRAL J., COLAZO C., DOMINGUEZ M., SANCHEZ B., GUROVICH S., LARES M., SCHNEITER M., GRANA D., RENZI V., RODRIGUEZ H., STARCK M., VRECH R., ARTOLA R., CHIAVASSA FERREYRA A., GIRARDINI C., QUINONES C., TAPIA L., TORNATORE M., MARSHALL J.L., DEPOY D.L., BRANCHESI M., BROCATO E., PADILLA N., PEREYRA N.A., MUKHERJEE S., BENACQUISTA M. and KEY J.

Abstract (from CDS):

We present the results of the optical follow-up conducted by the TOROS collaboration of the first gravitational-wave event GW150914. We conducted unfiltered CCD observations (0.35-1 µm) with the 1.5 m telescope at Bosque Alegre starting ∼2.5 days after the alarm. Given our limited field of view (∼100 arcmin^2), we targeted 14 nearby galaxies that were observable from the site and were located within the area of higher localization probability. We analyzed the observations using two independent implementations of difference-imaging algorithms, followed by a Random-Forest-based algorithm to discriminate between real and bogus transients. We did not find any bona fide transient event in the surveyed area down to a 5σ limiting magnitude of r=21.7 mag (AB). Our result is consistent with the LIGO detection of a binary black hole merger, for which no electromagnetic counterparts are expected, and with the expected rates of other astrophysical transients.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): gravitational waves - techniques: image processing - techniques: image processing

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 1933 EmG 03 25 39.883 -52 47 07.73   12.91   12.19 13.0 ~ 78 0
2 NGC 1529 GiG 04 07 19.8961006320 -62 53 57.619933332   14.39   12.92   ~ 27 0
3 IC 2038 GiP 04 08 53.7569973144 -55 59 21.778144080   14.82   13.80   ~ 43 0
4 IC 2039 GiP 04 09 02.3235506064 -56 00 41.646005964   14.97   13.91   ~ 35 0
5 LEDA 381152 EmG 04 14 20.26 -58 12 26.4   16.72   16.05   ~ 8 0
6 LEDA 75108 AG? 04 14 40.94 -58 07 54.9   16.67   15.85   ~ 8 0
7 NGC 1559 GiG 04 17 35.7508602240 -62 47 01.251567384   11.19 10.45 10.11 10.4 ~ 325 1
8 LEDA 128075 AG? 04 19 26.4176906688 -60 32 17.989591164   15.91       ~ 10 0
9 ESO 84-15 AG? 04 22 12.68 -63 36 40.8   15.33   14.61 14.0 ~ 18 0
10 ESO 119-5 EmG 04 48 17.23 -60 17 39.3   15.69   15.51 15.6 ~ 14 0
11 LEDA 16318 G 04 54 55.6 -61 33 51   16.1   15.5 16.4 ~ 12 0
12 LEDA 280995 EmG 06 25 31.747 -69 09 09.42   15.81   15.00   ~ 6 0
13 LEDA 269445 EmG 06 40 50.1547960080 -71 19 49.100211084   16.17   14.92   ~ 9 0
14 ESO 58-18 AG? 06 50 22.32 -71 01 51.7   16.39   15.08 14.8 ~ 9 0
15 GrW 150914 GWE ~ ~           ~ 674 1

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