GCN Circular 21772
Subject
LIGO/Virgo G299232: GRAWITA Asiago optical observations
Date
2017-08-31T10:39:34Z (8 years ago)
From
Lina Tomasella at INAF/OAPd <lina.tomasella@oapd.inaf.it>
L. Tomasella, S. Benetti, E. Cappellaro (INAF-OAPD), G. Greco (Urbino University/INFN Firenze), L. Amati (INAF-IASF Bo), L. A. Antonelli, S. Ascenzi (INAF-OAR), M.T. Botticella (INAF-OAC), M. Branchesi (GSSI), S. Campana, S. Covino, P. D'Avanzo (INAF-OAB), V. D'Elia (INAF-ASDC), D. Fugazza, F. Getman, A. Grado (INAF-OAC), L. Limatola (INAF-OAC), M. Lisi (INAF-OAR), A. Melandri (INAF-OAB), L. Nicastro, E. Palazzi, E. Pian (INAF-IASF Bo), S. Piranomonte, L. Pulone (INAF-OAR), A. Rossi (INAF-IASF Bo), P. Schipani (INAF-OAC), G. Stratta (Urbino University/INFN Firenze), G. Tagliaferri (INAF-OAB), V. Testa (INAF-OAR), S. Yang (INAF-OAPD), E. Brocato (INAF-OAR) on behalf of GRavitational Wave Inaf TeAm report:
We carried out follow up observations of LIGO/Virgo G299232 (LVC, GCN 21693) with the Schmidt 67/92 telescope located at Cima Ekar (Asiago, Italy).
Sloan gr-bands images were taken on 2017-08-26 starting from UT 00:10:21.
The pointing sequence was generated using the GWskyscript (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.
Each pointing covers 1x1 square degrees of the sky with 3x180 sec exposure time per band.
The pointing blocks are centered on the following coordinates RA, Dec (J2000) and UT starting times of exposures:
a. 36.76037 +61.84232 2017-08-26T00:06:58
b. 41.81579 +63.26814 2017-08-26T00:47:35
c. 28.76182 +34.24004 2017-08-26T01:15:13
d. 29.34192 +32.22710 2017-08-26T01:41:33
e. 25.77839 +32.19475 2017-08-26T02:06:24
f. 28.89056 +30.76806 2017-08-26T02:30:09
The single exposure is characterised by an AB limiting magnitude of r > 22.
We also observed with the Copernico 1.82m telescope (Cima Ekar, Asiago, Italy) and equipped with AFOSC instrument.
Sloan g and r-bands images (FOV = 8.8 X 8.8 arcmin)
were taken on 2017-08-26 starting from UT 00:18:10 either of seven nearby galaxies whose location on the sky and distance falls in the 90% volume reported by the
BAYESTAR probability sky map (Singer et al. 2016) and listed by Cook et al. 2017 in GCN n. 21707 (pointing 1-7),
and generated using the GWskyscript (https://github.com/ggreco77/GWsky; pointing 8-11):
1. IC 1695 2017-08-26T01:44:39
2. UGC01400 2017-08-26T01:53:39
3. UGC00774 2017-08-26T01:59:13
4. IC0260 2017-08-26T02:07:20
5. NGC0326 2017-08-26T02:13:02
6. SDSS J014929.88+123032.4 2017-08-26T02:18:27
7. MRK 0567 2017-08-26T02:30:00
8. 27.83787 +33.058979 2017-08-26T00:15:07
9. 30.54151 +52.365807 2017-08-26T00:29:12
10. 24.86730 +18.979811 2017-08-26T01:04:49
11. 28.69988 +31.314634 2017-08-26T01:29:22
Preliminary analysis do not show new transients in these fields.