[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]

[vsnet-grb-info 1064] GRB030329, SPM optical observations



TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2171
SUBJECT: GRB030329, SPM optical observations
DATE:    03/04/25 11:53:46 GMT
FROM:    Sergej Zharikov at OAN IA UNAM  <zhar@astrosen.unam.mx>

S. Zharikov, G. Tovmassian, M. Richer (OAN SPM IA UNAM, Ensenada, Mexico)
report:

We have observed the OT GRB030329 found by B.Peterson and P.Price (GCN 
1985) using 1.5m telescope of OAN-SPM Observatory, BC, Mexico. 
A set of exposures in UBVRI Bessel filters was obtained 
24 April and 25 April under photometric and good seeing conditions. 
Standard stars RU 149  from Landolt's  catalogue
were used for photometric calibrations in the each night.

The results of photometry of summed images are following:
24 April
<Tobs>      Texp.   Filter  Mag.

UT 5:50    5400sec   U    21.76(12)
UT 6:56    4800sec   B    21.51(6)
UT 5:54    2400sec   V    20.73(4)
UT 6:30    3300sec   R    20.17(5)
UT 6:10    2400sec   I    19.90(5)
Corresponding color indexes are
 
U-B = 0.25(14) B-V = 0.78(7)
V-R = 0.56(6)  R-I = 0.27(6) 


25 April   
<Tobs>      Texp    Filter   Mag.
UT 5:10   5400sec   B      21.63(5) 
UT 7:30   3600sec   V      21.72(4)
UT 6:17   2400sec   R      20.16(5)
UT 8:00   3600sec   I      20.01(5)

The magnitudes no changed during those nights.
The OT source looks like a point-like object.
Two faint extended objects detected nearly OT position.
O1: 10:44:50.03 J2000  +21:31:10  R~22.5  distance from OT is about 7"
O2: 10:44:49.4  J2000  +21:31:14  R~22.9  distance from OT is about 9"

This message may be cited


Return to Home Page

Return to the Powerful Daisaku Nogami

vsnet-adm@kusastro.kyoto-u.ac.jp

Powered by ooruri technology