GCN Circular 4587
Subject
GRB060124: optical observations at Asiago
Date
2006-01-25T02:48:39Z (19 years ago)
From
Nicola Masetti at INAF-IASF,Bologna <masetti@iasfbo.inaf.it>
N. Masetti, E. Palazzi, E. Maiorano (INAF-IASF, Bologna),
E. Pian (INAF - Astron. Obs. of Trieste), E. Giro
(INAF - Astron. Obs. of Asiago), C. Bonoli (INAF - Astron.
Obs. of Padova) and D. Malesani (SISSA, Trieste),
on behalf of a larger Italian collaboration, report:
"We have obtained R-band imaging and an optical spectrum of
the OT (Kann, GCN 4577) of GRB060124 (Holland et al. GCN 4570;
Mangano et al., GCN 4578) with the 1.82-m "Copernico" telescope
(plus AFOSC) of the Astronomical Observatory of Asiago (Italy).
The seeing was ~2.5 arcsec during the observations.
The R-band observation started on January 24.970 UT,
i.e. 0.31 days after the GRB, and lasted 600 s.
The OT was well detected; we measure for it a magnitude
R = 18.5 +- 0.1 with respect to USNO-A2.0 star U1575_02242799,
which has coordinates (J2000) RA = 05 08 31.05,
Dec = +69 44 27.9 and magnitude R = 17.3.
The 1-hour spectrum, acquired starting on January 24.917 UT,
is characterized by a smooth and basically featureless
continuum. No emission lines are detected; absorption
features are possibly present, but their low S/N prevents
us to confirm their reality.
This message is citeable."