[vsnet-grb-info 1835] GRB 050624: spectroscopy of object in the XRT error circle

GCN Circulars gcncirc at capella.gsfc.nasa.gov
Tue Jul 26 03:07:55 JST 2005


TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3675
SUBJECT: GRB 050624: spectroscopy of object in the XRT error circle 
DATE:    05/07/25 18:05:48 GMT
FROM:    Silvia Piranomonte at OAR  <piranomonte at mporzio.astro.it>

S. Piranomonte (INAF/OAR), D. Fugazza (INAF/OABr), F. Fiore (INAF/OAR), S. Covino (INAF/OABr), P. D'Avanzo (INAF/OABr), D. Malesani (SISSA), G. Tagliaferri (INAF/OABr), G. Chincarini (Univ. 
Milano-Bicocca) and L. Stella (INAF/OAR), on behalf of the MISTICI collaboration, report:

Using the FORS1 instrument at the ESO VLT, we obtained a spectrum of the 
object indicated by Antonelli et al. (GCN 3666), also named as object B 
by Bloom et al. (GCN 3672). This object is liying close to the XRT 
errorbox center (Covino et al., GCN 3665; Romano et al., GCN 3669). 
Observations were obtained on 2005, July 24, starting at 23:16:00 
UT, under good seeing conditions. We used the grism 300V with a slit of 
1.0 arcsec. The integration time was 900 s.


The object is identified with a star trough Ca, CN, G-band, Hbeta, Na 
and Halpha faint absorption lines. It has therefore no likely 
association with GRB 050724.

We thank the excellent work by the ESO staff in performing these 
observations.

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