GCN Circular 21653
Subject
LIGO/Virgo G298048: ESO/VLT optical observations
Date
2017-08-23T07:52:38Z (7 years ago)
From
Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>
P. D'Avanzo, A. Melandri, S. Covino (INAF-OAB), M. G. Bernardini (LUPM/INAF-OAB), M. Branchesi (GSSI),
S. Campana (INAF-OAB), V. D'Elia (INAF-ASDC), M. Della Valle (INAF-OAC), Y. Z. Fan (PMO, Nanjing),
G. Ghirlanda, G. Ghisellini (INAF-OAB), L. Nava (INAF-OATs/INAF-OAB), E. Palazzi (INAF-IAFS Bo),
A. Pescalli (Univ. Insubria/INAF-OAB), T. Piran (HUJI), S. Piranomonte (INAF-OAR),
O. S. Salafia (Univ. Bicocca/INAF-OAB), R. Salvaterra (INAF-IASF Mi), G. Stratta (Urbino University/INFN Firenze),
G. Tagliaferri (INAF-OAB), E. Troja (NASA-GSFC), S. D. Vergani (Obs. Paris/CNRS/INAF-OAB), Z. P. Zhin (PMO, Nanjing),
and
G. Greco (Urbino University/INFN Firenze), D. Fugazza (INAF-OAB), L. Amati (INAF-IASF Bo), L. A. Antonelli, (INAF-OAR),
S. Ascenzi (INAF-OAR), S. Benetti (INAF-OAPD), M.T. Botticella (INAF-OAC), E. Cappellaro (INAF-OAPD),
F. Getman (INAF-OAC), A. Grado (INAF-OAC), L. Limatola (INAF-OAC), M. Lisi (INAF-OAR), L. Nicastro (INAF-IASF Bo),
E. Pian (SNS-Pisa), L. Pulone (INAF-OAR), A. Rossi (INAF-IASF Bo), V. Testa (INAF-OAR), L . Tomasella (INAF-OAPD),
S. Yang (INAF-OAPD), E. Brocato (INAF-OAR) on behalf of GRavitational Wave Inaf TeAm report:
We observed the transient SSS17a in NGC 4993 reported by Coulter et al. (LVC GCN 21529) with the ESO/VLT UT1
equipped with the FORS2 camera. Imaging observations were carried out on 2017 Aug 21 starting at 23:23:10 UT
during twilight (about 4.5 days after the LIGO/Virgo event; LVC GCNs 21509) with the B, V, R, I and z filters.
The source is detected in all bands, showing a red color. From preliminary photometry (likely contaminated by the host
galaxy light) we measure the following AB magnitudes:
R = 19.4 +/- 0.2
z = 18.5 +/- 0.2
calibrated against the USNOB1 and PAN-STARRS catalogues.
We acknowledge excellent support from the from the ESO observing staff in Paranal, in particular Jesus M. Corral-Santana
and Stephane Brillant.