TITLE: GCN CIRCULAR NUMBER: 18338 SUBJECT: LIGO/Virgo G184098: Observations from the TOROS collaboration DATE: 15/09/20 01:42:09 GMT FROM: Mario Diaz at U of Texas Carlos Colazo, Diego Garcia Lambas, Bruno Sanchez, Mariano Dominguez (Astronomical Observatory of Cordoba), and Martin Beroiz, Tania Peñuela and Mario C. Diaz (U of Texas, Rio Grande Valley) on behalf of the TOROS team reports: The TOROS collaboration observed for a few hours Wednesday Sep 16 and Thursday Sep 17 at the Bosque Alegre Astrophysical Station (located in Cordoba province). Two instruments were used the 1.5 m reflector with a FOV 22â<80><99>X14â<80><99> with a limiting magnitude of ~20 and a 0.40 cm reflector with a 0.5x0.5 deg FOV. Due to the limited FOV instead of performing systematic surveys of regions within a given error a few objects were followed for some time. For Sept 16: These are for the 1.5 m: Object RAJ2000[h] DecJ2000[deg] AppMag IC1933 3.42774 -52.78547 12.5 NGC1529 4.12222 -62.89993 14.52 IC2038 4.14835 -55.99074 14.3 IC2039 4.15066 -56.01172 14.93 With the 0.40 cm (Toritos) the following was followed: PGC383392 3.98036 -57.98515 16.96 For Sep 17 Toritos Telescope 0.4m Number Object RAJ2000 DecJ2000 Lim Mag. FoV Filter 1 ESO057-080 6.38592 -68.7328 18.5 30â<80><99>x30â<80><99> Clear 2 ESO085-030 5.02499 -63.29273 18.5 30â<80><99>x30â<80><99> Clear 3 IC2049 4.20121 -58.5573 18.5 30â<80><99>x30â<80><99> Clear 4 IC2056 4.27348 -60.20683 18.5 30â<80><99>x30â<80><99> Clear 5 NGC1809 5.03488 -69.56724 18.5 30â<80><99>x30â<80><99> Clear 6 NGC1892 5.28585 -64.95983 18.5 30â<80><99>x30â<80><99> Clear 7 NGC2187 6.06456 -69.57743 18.5 30â<80><99>x30â<80><99> Clear EABA 1.54m Number Object RAJ2000 DecJ2000 FoV Filter 1 ESO058-018 6.83959 -71.03123 12â<80><99>x8â<80><99> Clear 2 ESO084-015 4.37003 -63.61097 12â<80><99>x8â<80><99> Clear 3 ESO119-005 4.80483 -60.29376 12â<80><99>x8â<80><99> Clear 4 NGC1559 4.29326 -62.78358 12â<80><99>x8â<80><99> Clear 5 PGC128075 4.32400 -60.53844 12â<80><99>x8â<80><99> Clear 6 PGC381152 4.23897 -58.20726 12â<80><99>x8â<80><99> Clear 7 PGC075108 4.24469 -58.13199 12â<80><99>x8â<80><99> Clear 8 PGC016318 4.91526 -61.56747 12â<80><99>x8â<80><99> Clear 9 PGC269445 6.68061 -71.33026 12â<80><99>x8â<80><99> Clear 10 PGC280995 6.4255 -69.15257 12â<80><99>x8â<80><99> Clear A crew from OAC has started preparation to start the follow-up campaign for O1 at the Macon site (Atacama region), but it was not ready for G184098. The analysis has not been completed yet. [GCN OPS NOTE(19sep15): This Circular was originally published on 03:29 18-Sep-2015 UT.] [GCN OPS NOTE(19sep15): The Sept 17 results were added to the original posting about ? day later.] `