Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 229

GRB990123: NIR Observation
1999-01-26T19:56:17Z (25 years ago)
Angelo Antonelli at Obs. Astro. di Roma <>
L.A. Antonelli, A. Di Paola, Osservatorio Astronomico di Roma, 
G. Gandolfi (BeppoSAX Scientific Operation Center) report on 
behalf of SWIRT Team and BeppoSAX Team:

"On 25.16 (UT) January 1999, we imaged the Optical Transient field 
in the K band using the 1.1m AZT-24 telescope and the near-infrared 
camera/spectrometer SWIRCAM at the Campo Imperatore Astronomical 
Observatory ( operated 
by the Astronomical Observatory of Rome (O.A.R.). 

The 4'X4' field of view was exposed for 3300 s reaching the limiting
magnitude in the K band of 17.9 +/- 0.2 mag. No source has been found
within the errorbox of the O.T. (IAUC 7094). This observation provides
a more compelling upper limit in K band with respect to the previous
observation in the same band (GCN #214). The behaviour of the 
source between the two observation, at this wavelenght, is unknown. 

Further near infrared observations are in progress.

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