GCN Circular 20376

M. Soares-Santos (Fermilab), J. Annis (Fermilab), E. Berger (Harvard) D. J.
Brout (UPenn), R. Butler (Fermilab), H.-Y. Chen (UChicago), P.
Cowperthwaite (Harvard), H. T. Diehl (Fermilab), Z. Doctor (UChicago), B.
Farr (UChicago), D. Finley (Fermilab), R Foley, W-F Fong (Arizona), J.
Frieman (UChicago), M. Garcia-Belido (CIEMAT/Madrid), R. Gruendl (NCSA), K.
Herner (Fermilab), D. Holz (UChicago), R. Kessler (UChicago), E. Neilsen
(Fermilab), A. Palmese (UCL), M. Sako (UPenn), B. Yanny (Fermilab)

On behalf of the DECam GW follow-up team and the DESGW team:

We report on observations of LVC trigger G268556 conducted with the Dark
Energy camera (DECam) on the Blanco telescope at CTIO as part of NOAO
program 2016B-0124 (PI: Berger). The observations commenced on 2017-01-05
01:34:45 UT (15 hours following the GW detection), and consisted of 90-sec
exposures in i-band.

We observed about 10% of the localization probability map in 4h of
observing time, covering 230 sq. deg. to a 5-sigma point source limiting
magnitude of i~23 AB mag.

Coordinates are given below.

Analysis is underway.

radec
0.430246 -35.4841
358.640221 -34.45238
4.146646 -37.5131
14.386904 -42.5855
355.722346 -33.4384
2.265329 -36.4986
16.634896 -43.5999
355.386617 -31.41045
6.077717 -38.5275
353.648446 -32.42443
0.096254 -37.5131
357.452083 -32.42443
12.230792 -39.542
12.212492 -41.571
358.27245 -36.48033
18.7554 -42.5855
8.062783 -39.542
1.970025 -38.5275
16.510696 -41.571
10.106204 -40.5565
18.962325 -44.6144
5.874796 -40.5565
10.018408 -42.5855
12.1923 -43.5999
14.3376 -40.5565
3.894796 -39.542
21.375646 -45.6289
21.375646 -45.6289
4.374242 -35.4841
21.0774 -43.5999
10.185421 -38.5275
7.914283 -41.571
2.53245 -34.4696
23.482921 -44.6144
14.441625 -44.6144
25.97865 -45.6289
23.882129 -46.6434
8.196946 -37.5131
6.261133 -36.4986
16.772746 -45.6289
18.568996 -40.5565
16.398796 -39.542
53.652854 -47.6579
25.519996 -43.5999
32.378042 -46.6434
19.192333 -46.6434
55.827133 -46.6434
20.808883 -41.571
27.492404 -42.5855
29.962592 -43.5999
28.003529 -44.6144
58.434467 -47.6579
30.305954 -45.6289
28.572029 -46.6434
36.758192 -48.6723
37.067833 -46.6434
33.226408 -42.5855
39.308158 -47.6579
57.923654 -45.6289
60.517033 -46.6434
48.871258 -47.6579
34.908854 -45.6289
29.744954 -47.6579
23.123908 -42.5855
25.107092 -41.571
51.137342 -46.6434
53.32065 -45.6289
46.447529 -46.6434
46.5153 -48.6723
59.948521 -44.6144
51.3939 -48.6723
34.526567 -47.6579
31.879696 -48.6723
26.489458 -47.6579
32.824725 -44.6144
60.393646 -37.5131
44.089667 -47.6579


-- 
Marcelle Soares-Santos
http://home.fnal.gov/~marcelle/
http://www.darkenergysurvey.org/ <http://darkenergysurvey.org/>