GRB 000408

 

From: GCN Circulars gcncirc@lheawww.gsfc.nasa.gov 
To: OERLICON@intelos.net 
Subject: GRB000408:  Optical CCD Observations from MIRO
Date: Monday, April 10, 2000 3:15 AM
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  629
SUBJECT: GRB000408:  Optical CCD Observations from MIRO
DATE:    00/04/10 07:06:08 GMT
FROM:    Kiran S Baliyan at Physical Research Lab, Ahmedabad,India  baliyan@prl.ernet.in 
   K.S. Baliyan, U.C. Joshi, S. Mondal, S. Chandrasekhar, J.K. Jain
   and B.G. Anandrao (MIRO-PRL, Ahmedabad, India) report:
   
Optical afterglow follow up observations of the grb000408 were made covering IPN error 
box (GCN 626) on April 9, 2000, beginning 16:15 UT. The 1024*1024 CCD (FOV 6'*6') mounted 
on 1.2 M IR telescope at Mt Abu IR Observatory, operated by Physical Research Laboratory, 
Ahmedabad- India, was used to get 600 seconds exposures each in V and I filters at each 
location covering the error box. 

The data analysis is in progress and an image will be put on the laboratory web page when 
available. We also intend to continue observations of the optical counterpart tonight as well.
 
This message may be cited.
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From: GCN Circulars gcncirc@lheawww.gsfc.nasa.gov 
To: OERLICON@intelos.net 
Subject: GRB000408, lotis optical observations
Date: Monday, April 10, 2000 2:03 AM
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  628
SUBJECT: GRB000408, lotis optical observations
DATE:    00/04/10 05:53:34 GMT
FROM:    Hye-Sook Park at LLNL  hpark@llnl.gov 
H. S. Park, R. Porrata (LLNL), G. G. Williams, D. Hartmann (Clemson), K. Hurley (UCB), 
S. Barthelmy (GSFC) report on behalf of the LOTIS collaboration:
The realtime BATSE trigger came at 7:37 pm local time when the sky was too bright for 
observation. However, Lotis' wide-field-of-view sky patrol data covered the grb000408 
IPN error box (GCN 626) 1.64 hours after the burst (15241s UTC). Comparison of the images 
with the previous sky patrol images, the Digital Sky Survey, and the Guide Star Catalog 
reveal no OT within the IPN error box brighter than m = 15.0 (5-sigma). No astronomical 
filter was used during these observations. Further analysis is in progress.
This message may be cited.
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From: GCN Circulars gcncirc@lheawww.gsfc.nasa.gov 
To: OERLICON@intelos.net 
Subject: GRB000408
Date: Saturday, April 08, 2000 5:54 PM
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  626
SUBJECT: GRB000408
DATE:    00/04/08 21:43:25 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  khurley@sunspot.ssl.berkeley.edu 
K. Hurley, S. Barthelmy, R. M. Kippen, and T. Cline, on behalf of the Ulysses, BATSE, and 
NEAR GRB teams, report:
Ulysses, BATSE, and NEAR observed GRB000408 (=BATSE 8069) at 9348 s UT.  As observed by 
Ulysses, this burst had a T90 duration of 2.5 s, a 25-100 keV fluence of 7.4x10^-6 erg/cm^2,
and a peak flux over 0.5 s of 3.7x10^-6 erg/cm^2 s.  Preliminary triangulation gives a 
~200 sq. arcmin. error box with the following coordinates:
     RA(2000)           DEC(2000)
9 h 10 m 31.86 s    66 o 34 '  35.72 "  (CENTER)
9 h 14 m 57.83 s    66 o 30 '  25.93 "  (CORNER)
9 h  7 m 41.72 s    66 o 33 '  18.90 "  (CORNER)
9 h 13 m 19.82 s    66 o 35 '  43.51 "  (CORNER)
9 h  5 m 56.89 s    66 o 38 '  22.95 "  (CORNER)
It should be possible to refine this error box considerably
within 24 h, when the high time resolution data become
available.