GCN Circular 20736
Subject
LIGO/Virgo G274296: GRAWITA-Campo Imperatore observation
Date
2017-02-25T17:06:09Z (8 years ago)
From
Enzo Brocato at INAF-OA Roma <enzo.brocato@oa-roma.inaf.it>
A. Giunta, A. Di Paola, M. Centrone, N. Napoleone, P. Tedesco (INAF-OAR), G. Greco, M. Branchesi (Urbino University/INFN Firenze), S. Covino (INAF-OAB), L. Amati (INAF-IASF Bo), L. A. Antonelli, S. Ascenzi (INAF-OAR), M.T. Botticella (INAF-OAC), S. Campana (INAF-OAB), E. Cappellaro (INAF OAPd), P. D'Avanzo (INAF-OAB), V. D'Elia (INAF-ASDC), F. Getman, A. Grado, L. Limatola (INAF-OAC), M. Lisi (INAF-OAR), A. Melandri (INAF-OAB), L. Nicastro, E. Palazzi (INAF-IASF Bo), E. Pian (SNS-Pisa), S. Piranomonte, L. Pulone (INAF-OAR), A. Rossi (INAF-IASF Bo), G. Stratta (Urbino University/INFN Firenze), G. Tagliaferri (INAF-OAB), V. Testa (INAF-OAR), L. Tomasella, S. Yang (INAF-OAPD), E. Brocato (INAF-OAR) on behalf of GRavitational Wave Inaf TeAm (GRAWITA) report:
We carried out observations of LIGO/Virgo G274296 (LVC, GCN 20689) with the 0.9m Schmidt Telesope located at the Campo Imperatore Observatory (Italy). The observations were taken in the r-sloan band on 2017-02-19 starting at 01:21:55 UT relatively good sky conditions.
The covered area captured a containment probability of ~5% and was chosen to maximize the number of local (< 30 Mpc) galaxies to be observed.
The area is divided in 4 blocks of 3x3 pointing each of them of covering 1.15x1.15 square degrees of the sky and 5x90 sec exptime each. The pointing sequence was generated using the GWsky script (https://github.com/ggreco77/GWsky) starting from the high probability region of the bayestar skymap and taking into account the airmass and relative density of nearby galaxies.
The pointings are centered on the following UT times, coordinates RA, Dec (J2000) and observed area:
2017-02-19T21:22:04 137.106 5.926 1.15x1.15 square degrees
2017-02-19T04:16:28 166.43 28.33 1.15x1.15 square degrees
2017-02-19T04:10:14 162.47 28.01 1.15x1.15 square degrees
3x3 pointing blocks
2017-02-19T02:54:33 157.481 28.318 ~3x~3 square degrees
2017-02-19T01:21:55 157.34 23.988 ~3x~3 square degrees
2017-02-19T23:35:11 157.22 20.9 ~3x~3 square degrees
2017-02-19T21:33:26 153.709 21.68 ~3x~3 square degrees
The limiting magnitude is r ~ 20.5. Analysis of images is ongoing.
--
Enzo Brocato
INAF - Osservatorio Astronomico di Roma
Via di Frascati 33,
I-00040 Monteporzio Catone, Italy
Phone: +39 0694286438 Fax: +39 06 9447243
skype: enzo.brocato
URL: SpoT Group Homepage: www.oa-teramo.inaf.it/SPoT