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TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1093
SUBJECT: HETE Trigger #1759 (GRB 010920?) optical observations 
DATE:    01/09/20 08:33:37 GMT
FROM:    Josh Bloom at CIT  <jsb@astro.caltech.edu>

HETE Trigger #1759 (GRB 010920?) optical observations

J. S. Bloom, D. W. Fox, P. D. Nicholson, C. Dumas, S. R. Kulkarni, D. E.
Reichart, P. A. Price, R. A. Simcoe report on behalf of the larger
Caltech-NRAO-CARA GRB collaboration:

"P. Nicholson and C. Dumar obtained two Sloan r' images of the entire
localization position reported for HETE trigger #1759 with the Hale
200-inch telescope at Palomar Observatory beginning 59 minutes after the
trigger.  The instrument used was the Large Format Camera (LFC) and the
observations were 3 min in duration. Visual comparison with the Digital
Palomar Observatory Sky Survey F plate reveals no obvious new source to
the depth of the DPOSS image (R ~ 20.5 mag)."

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TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1094
SUBJECT: HETE Trigger #1760 (GRB 010920B?): a new optical source
DATE:    01/09/20 09:19:04 GMT
FROM:    Josh Bloom at CIT  <jsb@astro.caltech.edu>

J. S. Bloom, D. Reichart, D. W. Fox, P. D. Nicholson, C. Dumas, S. R.
Kulkarni, P. A. Price, R. A. Simcoe report on behalf of the larger
Caltech-NRAO-CARA GRB collaboration:

"P. Nicholson and C. Dumar obtained two Sloan r' images of the entire
localization position reported for HETE trigger #1760 with the Hale
200-inch telescope at Palomar Observatory beginning 45.5 minutes after the
trigger. The instrument used was the Large Format Camera (LFC) and the
observations were 3 min in duration. Visual comparison with the DSS red
image reveals a new source at approximate location (+/- ~2 arcsec; as
compared with the DSS):

     RA:   22:13:31.2 (J2000)
     DEC: -14:59:44

Given that the source is < 4 deg off the ecliptic plane, the source may be
an asteroid."

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TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1095
SUBJECT: HETE Trigger #1760 (GRB 010920B?): new optical source = asteroid
DATE:    01/09/20 09:51:37 GMT
FROM:    Josh Bloom at CIT  <jsb@astro.caltech.edu>

HETE Trigger #1760 (GRB 010920B?): new optical source = asteroid

J. S. Bloom, D. Reichart, D. W. Fox, P. D. Nicholson, C. Dumas, S. R.
Kulkarni, P. A. Price, R. A. Simcoe report on behalf of the larger
Caltech-NRAO-CARA GRB collaboration:

"A follow-up image to those reported in GCN #1094 obtained at Palomar
shows that the 'new optical source' moved by ~29 arcsec in 66 min,
primarily westwardly.  Given the apparent magnitude, location near the
ecliptic, and high proper motion, the source is likely an unrelated Main
Belt asteroid."

This message may be cited.