Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 5731

Subject
GRB 061019: TAROT La Silla observatory optical observations
Date
2006-10-19T09:44:53Z (18 years ago)
From
Alain Klotz at CESR-CNRS <Alain.Klotz@free.fr>
Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 061019 detected by SWIFT
(trigger 234516) with the TAROT robotic telescope (D=25cm)
located at the La Silla observatory, Chile.

The observations started 43.5s after the GRB trigger
(5.3s after the notice). The elevation of the field increased from
from 1 degrees above horizon and weather conditions
were good. Unfortunately, the local horizon does not
allow to obtain sky images before 902s after the trigger
(when the source was higher than 4 deg. elevation).

No OT was detected at the position of XRT (Guidorzi & Romano,
GCNC 5729) nor at the position of REM (Covino et al. GCNC 5730).

The date of trigger : t0 = 2006-10-19T04:19:06.816

The first image is 90.0s exposure:
t0+902s to t0+992s : R > 14.8

We co-added a series of exposures:
t0+904s to t0+1382s : R > 15.8

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon=181.7352 lat= +4.2508
and the galactic extinction in R band is 3.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

N.B. Sky was cloudy at the TAROT Calern observatory.

This message may be cited.
Looking for U.S. government information and services? Visit USA.gov