TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  894
SUBJECT: GRB 001105, further optical observations
DATE:    00/11/30 18:33:55 GMT
FROM:    Alberto Castro-Tirado at LAEFF-INTA  <ajct@laeff.esa.es>

J. M. Castro Ceron (ROA, San Fernando),
A. J. Castro-Tirado, IAA-CSIC (Granada) and  LAEFF-INTA (Madrid),
A. Henden and F. Vrba, USNO (Flagstaff)
J. Fliri, LMU (Muenchen)
J. Greiner, AIP (Potsdam)
H. Meusinger and S. Klose, TLS (Tautenburg)
V. Mohan, Ram Sagar, S.B. Pandey (UPSO, Nainital),
on behalf of a larger collaboration,

report:

"We have obtained further imaging of 90% of the error box for GRB
001105 (Hurley et al. GCN 874), with the 1.23 and 2.2-m telescopes
at the German-Spanish Calar Alto Observatory and with the 1.0-m
telescope at the US Naval Observatory Flagstaff Station, thus
adding to the results given by Mohan et al. (CGN 875) with the 1.0-m
telescope at the U. P. State Observatory. Only the outermost eastern            and western corners of the GRB error box were not covered by our images.
The summary of the observations is detailed below:

-----------------------------------------------------------------
   Date (UT)      Telescope    filter  exposure      limiting
   (Start)                              (sec)          mag.
-----------------------------------------------------------------
  Nov. 06.99       1.0  UPSO     R       300           20.0
  Nov. 08.45       1.0  NOFS     R       720           20.5
  Nov. 09.19       1.23 CAHA     R      7 * 500        22.1
  Nov. 09.22       1.23 CAHA     B       600           21.5
  Nov. 09.45       1.0  NOFS     I      3 * 600        20.0
  Nov. 30.23       2.2  CAHA     R      2 * 300        22.0
-----------------------------------------------------------------

The photometric calibration was done based on the reference
stars provided by Henden (GCN 876). A comparison of the different
images reveals no fading object down to the limiting magnitudes
given in the table."


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