(Kyoto points plotted on S. Holland's original light curve)
TITLE: GCN GRB OBSERVATION REPORT NUMBER: 959 SUBJECT: ALERT: GRB020223: the brightest GRB observed by BeppoSAX DATE: 01/02/22 10:36:47 GMT FROM: Luigi Piro at IAS/CNR FrascatiOn Feb. 22, 07:23:30 U.T. a very bright GRB, possibly the brightest ever observed by BeppoSAX has been detected simultaneously by the GRBM and WFC1 aboard BeppoSAX.
Preliminary coordinates from WFC are:
R.A.(2000)= 223.069 DEC.(2000)= 43.035 The error radius at this stage of analysis is 5'. We are planning a BeppoSAX-NFI observation. Luigi Piro BeppoSAX Mission Scientist(vsnet-grb 67)
Re: GRB 010222
(What is the correct name of the burst?) Close to center of the error circle of the giant burst, detected by BeppoSAX on Feb. 22, there is a white dwarf, which may serve as a good local photometric calibration standard.
GSC3049.579 145214.68 +430141.7 (2000.0) 14.53 1 GSC3049.579 145214.75 +430141.1 (2000.0) 14.64 1 USNO1275.08641199 145214.724 +430140.90 (2000.0) 14.7 13.9 145213.3 +430139 (2000.0) FBS1450+432 14.5pg B1 DA 1 145213.3 +430140 (2000.0) PG1450+432 14.56 DA 1 145217.9 +430059 (2000.0) DA1(Buscombe) V=14.50 B-V=-.22 U-B=-.89(vsnet-grb 70)
TITLE: GCN GRB OBSERVATION REPORT NUMBER: 960 SUBJECT: GRB010222: BeppoSAX refined position DATE: 01/02/22 11:39:13 GMT FROM: Luigi Piro at IAS/CNR Frascati
GRB010222: BeppoSAX refined position Refined coordinates of GRB010222 from BeppoSAX WFC are: R.A.(2000)= 223.051 DEC.(2000)= 43.012 The error radius at this stage of analysis is 2.5'. Please note that in GCN 959 the burst has been named GRB020223 instead of GRB010222 due to a trivial typo. G. Gandolfi on behalf of BeppoSAX Mission Scientist
TITLE: GCN GRB OBSERVATION REPORT NUMBER: 961 SUBJECT: GRB010222 DATE: 01/02/22 11:48:59 GMT FROM: Arne A. Henden at USNO/USRA(vsnet-grb 75)
A. Henden, on behalf of the USNO GRB team, reports: A possible optical transient has been detected in the SAX error box (GCN 960). It is about 18th magnitude in V. The coordinates are: 223.05238 43.01844 14:52:12.0 +43:01:06 J2000 (corrected position in GCN 962) Observations continue.
We are observing GRB 010222 OT at Nyrola Observatory.
Our first summed image is posted to :
Image is taken February 22, 2001 17.40 UT. It is a sum of first nine five minute R-exposures. GRB magnitude is approximately 19 mag.
We will continue observing all night with BVR filters.
On behalf of Nyrola Observatory GRB team
Harry T. Hyvonen
M. Uemura, R. Ishioka, H. Iwamatsu, T. Kato, Kyoto Univ., and H. Yamaoka, Kyushu Univ., on behalf of VSNET-GRB collaboration report:
We observed the field of GRB 010222 starting at Feb. 22, 12:16 UT, with 0.30-m Schmidt-Cassegren telescope (+ unfiltered CCD) at Kyoto University. The GRB was detected on the images. The following photometry has been obtained:
mid UT total exp. delta mag detection level Feb. 22.534 (22.511-22.554) 2160s 3.09 (1.7 sigma) 22.852 (22.842-22.861) 1350s 4.61 (6.2 sigma)The magnitudes are relative to PG 1450+432 (V=14.50). By assuming Rc = 14.70 for this star (Henden et al.), the observed magnitudes are 17.8 and 19.3 respectively. The low detection level of the first run was a result of low-alititude haze.
This message may be cited.
Astronomy Picture of the Day (APOD)
For more reading (in Japanese)
GRB 021004 (in Japanese)
Return to HomePage
Return to Daisaku Nogami's page