GCN Circular 18332
Subject
LIGO/Virgo G184098: TAROT La Silla Observatory optical observations (TZAC)
Date
2015-09-20T01:14:46Z (9 years ago)
From
Michel Boer at CESR-CNRS <michel.boer@unice.fr>
A. Klotz (IRAP, CNRS/UPS) and M. Boer (ARTEMIS, CNRS/OCA/UNS) report, on
behalf of the TZAC collaboration:
We have imaged part of the error box of the candidate event GW 150914 == ALIGO
trigger 184098 with the TAROT robotic telescope located at La Silla
Observatory (ESO). Observations started during the second part of the night
because of localization constrains and adverse conditions at the beginning of
the night. TAROT Calern (OCA) could not be used because of bad weather.
TAROT has a field of view of 1.9�� x 1.9��, and a typical limiting magnitude
with the C (clear) position of R < 18 for 120s exposure time.
54 images were acquired within the 20% probability contour. 5 fields were
chosen to maximise the number of galaxies surveyed.
The log of the observations is given below.
No obvious candidate is apparent on the images, beside some mis-catalogued stars.
Further analysis of the image is in progress and will be reported later.
Date-Obs exp f ra dec (radec corner1) (radec corner2) (radec corner3) (radec corner4)
2015-09-17T04:59:59 120 C 90.151 -69.613 ( 92.946 -70.516) ( 87.373 -70.523) ( 92.694 -68.662) ( 87.586 -68.669)
2015-09-17T05:02:09 120 C 90.149 -69.614 ( 92.944 -70.516) ( 87.371 -70.524) ( 92.692 -68.662) ( 87.584 -68.669)
2015-09-17T05:04:20 120 B 90.162 -69.616 ( 92.960 -70.519) ( 87.380 -70.527) ( 92.707 -68.663) ( 87.593 -68.671)
2015-09-17T05:10:00 120 C 103.487 -70.333 (106.387 -71.234) (100.607 -71.243) (106.113 -69.380) (100.834 -69.389)
2015-09-17T05:19:59 120 C 109.489 -69.719 (112.300 -70.621) (106.696 -70.630) (112.044 -68.766) (106.911 -68.775)
2015-09-17T05:22:09 120 C 109.487 -69.720 (112.298 -70.622) (106.695 -70.631) (112.042 -68.767) (106.909 -68.776)
2015-09-17T05:24:19 120 B 109.500 -69.722 (112.315 -70.624) (106.705 -70.634) (112.057 -68.768) (106.918 -68.778)
2015-09-17T05:34:24 120 B 90.145 -69.618 ( 92.943 -70.522) ( 87.363 -70.529) ( 92.691 -68.666) ( 87.578 -68.672)
2015-09-17T05:42:10 120 C 103.462 -70.318 (106.358 -71.219) (100.584 -71.227) (106.087 -69.365) (100.813 -69.373)
2015-09-17T05:44:20 120 B 103.473 -70.320 (106.374 -71.222) (100.592 -71.231) (106.101 -69.366) (100.820 -69.374)
2015-09-17T05:50:00 120 C 109.478 -69.718 (112.288 -70.620) (106.686 -70.629) (112.033 -68.766) (106.901 -68.774)
2015-09-17T05:52:10 120 C 109.477 -69.719 (112.287 -70.621) (106.684 -70.629) (112.032 -68.767) (106.899 -68.775)
2015-09-17T05:54:20 120 B 109.489 -69.721 (112.302 -70.624) (106.693 -70.633) (112.046 -68.768) (106.908 -68.776)
2015-09-17T06:00:00 120 C 103.443 -70.331 (106.340 -71.232) (100.562 -71.240) (106.070 -69.379) (100.792 -69.386)
2015-09-17T06:02:11 120 C 103.440 -70.331 (106.338 -71.233) (100.559 -71.241) (106.067 -69.379) (100.790 -69.386)
2015-09-17T06:09:59 120 C 109.461 -69.732 (112.272 -70.634) (106.666 -70.642) (112.018 -68.780) (106.882 -68.787)
2015-09-17T06:12:10 120 C 109.458 -69.733 (112.269 -70.635) (106.663 -70.643) (112.015 -68.781) (106.879 -68.788)
2015-09-17T06:14:20 120 B 109.469 -69.735 (112.284 -70.638) (106.672 -70.646) (112.028 -68.782) (106.888 -68.789)
2015-09-17T06:20:00 120 C 114.974 -69.632 (117.771 -70.534) (112.193 -70.542) (117.519 -68.680) (112.407 -68.687)
2015-09-17T06:22:11 120 C 114.971 -69.632 (117.768 -70.535) (112.190 -70.543) (117.516 -68.681) (112.404 -68.688)
2015-09-17T06:24:21 120 B 114.982 -69.635 (117.782 -70.538) (112.197 -70.546) (117.529 -68.682) (112.411 -68.689)
2015-09-17T06:29:59 120 C 103.427 -70.328 (106.323 -71.230) (100.547 -71.237) (106.054 -69.376) (100.778 -69.382)
2015-09-17T06:32:09 120 C 103.424 -70.329 (106.321 -71.231) (100.544 -71.237) (106.052 -69.377) (100.776 -69.383)
2015-09-17T06:34:20 120 B 103.437 -70.330 (106.337 -71.233) (100.554 -71.240) (106.067 -69.378) (100.785 -69.384)
2015-09-17T06:40:00 120 C 109.434 -69.730 (112.244 -70.633) (106.639 -70.639) (111.991 -68.779) (106.857 -68.785)
2015-09-17T06:42:10 120 C 109.431 -69.730 (112.241 -70.633) (106.636 -70.640) (111.989 -68.779) (106.855 -68.785)
2015-09-17T06:44:20 120 B 109.443 -69.732 (112.256 -70.636) (106.646 -70.643) (112.003 -68.780) (106.863 -68.787)
2015-09-17T06:49:59 120 C 114.941 -69.629 (117.736 -70.532) (112.160 -70.539) (117.486 -68.678) (112.375 -68.684)
2015-09-17T06:52:09 120 C 114.939 -69.630 (117.734 -70.533) (112.157 -70.539) (117.484 -68.679) (112.373 -68.685)
2015-09-17T06:54:20 120 B 114.950 -69.632 (117.750 -70.535) (112.166 -70.543) (117.499 -68.679) (112.382 -68.686)
2015-09-17T07:09:59 120 C 109.422 -69.726 (112.230 -70.629) (106.627 -70.635) (111.979 -68.775) (106.847 -68.781)
2015-09-17T07:12:09 120 C 109.419 -69.727 (112.227 -70.630) (106.624 -70.636) (111.977 -68.776) (106.844 -68.781)
2015-09-17T07:14:19 120 B 109.431 -69.729 (112.242 -70.633) (106.633 -70.639) (111.990 -68.777) (106.852 -68.783)
2015-09-17T07:20:00 120 C 114.931 -69.617 (117.724 -70.520) (112.151 -70.526) (117.476 -68.666) (112.368 -68.672)
2015-09-17T07:22:10 120 C 114.930 -69.617 (117.722 -70.521) (112.150 -70.526) (117.475 -68.667) (112.367 -68.672)
2015-09-17T07:24:20 120 B 114.942 -69.619 (117.738 -70.523) (112.159 -70.530) (117.489 -68.667) (112.376 -68.673)
2015-09-17T07:30:00 120 C 103.394 -70.308 (106.284 -71.211) (100.515 -71.216) (106.020 -69.357) (100.750 -69.362)
2015-09-17T07:32:10 120 C 103.392 -70.308 (106.283 -71.211) (100.514 -71.216) (106.019 -69.357) (100.749 -69.362)
2015-09-17T07:34:21 120 B 103.405 -70.310 (106.300 -71.214) (100.524 -71.219) (106.034 -69.358) (100.758 -69.363)
2015-09-17T07:50:00 120 C 114.908 -69.612 (117.699 -70.516) (112.128 -70.520) (117.453 -68.662) (112.347 -68.666)
2015-09-17T07:52:10 120 C 114.906 -69.612 (117.697 -70.516) (112.127 -70.521) (117.451 -68.662) (112.345 -68.666)
2015-09-17T07:54:20 120 B 114.919 -69.614 (117.714 -70.518) (112.136 -70.524) (117.466 -68.662) (112.355 -68.667)
2015-09-17T07:59:59 120 C 109.397 -69.717 (112.202 -70.621) (106.602 -70.625) (111.954 -68.767) (106.824 -68.771)
2015-09-17T08:02:09 120 C 109.394 -69.717 (112.199 -70.621) (106.600 -70.625) (111.952 -68.767) (106.822 -68.771)
2015-09-17T08:04:20 120 B 109.407 -69.718 (112.215 -70.623) (106.610 -70.628) (111.966 -68.767) (106.831 -68.772)
2015-09-17T08:10:00 120 C 114.901 -69.609 (117.691 -70.513) (112.121 -70.518) (117.446 -68.659) (112.341 -68.663)
2015-09-17T08:12:11 120 C 114.900 -69.609 (117.690 -70.513) (112.120 -70.518) (117.445 -68.659) (112.340 -68.663)
2015-09-17T08:14:21 120 B 114.912 -69.611 (117.706 -70.516) (112.129 -70.521) (117.459 -68.660) (112.349 -68.664)
2015-09-17T08:19:59 120 C 124.921 -68.013 (127.508 -68.919) (122.342 -68.923) (127.298 -67.064) (122.531 -67.068)
2015-09-17T08:22:09 120 C 124.920 -68.013 (127.507 -68.919) (122.341 -68.923) (127.297 -67.065) (122.529 -67.069)
2015-09-17T08:24:19 120 B 124.931 -68.015 (127.522 -68.922) (122.350 -68.926) (127.310 -67.065) (122.537 -67.069)
2015-09-17T08:30:00 120 C 109.383 -69.713 (112.186 -70.617) (106.589 -70.621) (111.940 -68.763) (106.812 -68.767)
2015-09-17T08:32:11 120 C 109.382 -69.713 (112.185 -70.618) (106.588 -70.622) (111.939 -68.764) (106.811 -68.767)
2015-09-17T08:34:21 120 B 109.394 -69.715 (112.201 -70.620) (106.597 -70.624) (111.954 -68.764) (106.820 -68.768)
[GCN OPS NOTE(19sep15): This Circular was originally published on 09:20 17-Sep-2015 UT.]