[vsnet-grb-info 4026] GRB 061121: MDM Optical Observations
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Thu Nov 23 05:06:31 JST 2006
TITLE: GCN CIRCULAR
NUMBER: 5840
SUBJECT: GRB 061121: MDM Optical Observations
DATE: 06/11/22 20:06:25 GMT
FROM: Jules Halpern at Columbia U. <jules at astro.columbia.edu>
J. P. Halpern, N. Mirabal, & E. Armstrong (Columbia U.)
report on behalf of the MDM Observatory GRB follow-up team:
"We began R-band observations of GRB 061121 (Page et al.,
GCN 5823) 20.57 hr after the burst using the MDM 2.4m.
Preliminary results from raw images are:
-----------------------------------------------------------
Date(UT) Mid-time(UT) t-t0(hr) Exp(s) R(mag)
-----------------------------------------------------------
Nov. 22 11:57 20.57 300 21.06 +/- 0.03
Nov. 22 12:49 21.44 300 21.13 +/- 0.04
-----------------------------------------------------------
These are referenced to the USNO B1.0 magnitude R=18.02 for
the star at (J2000) R.A.=09h48m54.77s, Decl.= -13d11'17.9".
Quoted errors are statistical only. Refined magnitudes and
additional results will be forthcoming.
This message may be cited."
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