Gamma-ray Burst 010109

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE


TITLE:             GCN/IPN POSITION NOTICE
NOTICE_DATE:       Wed 10 Jan 01 18:53:13 UT
NOTICE_TYPE:       IPN Double Box
IPN_NUMBER:        79
GRB_DATE:          11917 TJD;     9 DOY;   01/01/09
GRB_TIME:          9485.00 SOD {02:38:05.00} UT
GRB_IPN_RA:        331.3723d {+22h 05m 29s} (J2000),
                   331.3887d {+22h 05m 33s} (current),
                   330.5670d {+22h 02m 16s} (1950)
GRB_IPN_DEC:       -50.5321d {-50d 31' 55"} (J2000),
                   -50.5271d {-50d 31' 37"} (current),
                   -50.7755d {-50d 46' 31"} (1950)
GRB_ERROR1_RA1:    331.7057d {+22h 06m 49s} (J2000)
GRB_ERROR1_DEC1:   -50.5304d {-50d 31' 48"} (J2000)
GRB_ERROR1_RA2:    332.7416d {+22h 10m 58s} (J2000)
GRB_ERROR1_DEC2:   -50.6923d {-50d 41' 31"} (J2000)
GRB_ERROR1_RA3:    329.2185d {+21h 56m 52s} (J2000)
GRB_ERROR1_DEC3:   -50.2741d {-50d 16' 26"} (J2000)
GRB_ERROR1_RA4:    331.0121d {+22h 04m 03s} (J2000)
GRB_ERROR1_DEC4:   -50.5304d {-50d 31' 48"} (J2000)
GRB_IPN2_RA:       323.2804d {+21h 33m 07s} (J2000)
GRB_IPN2_DEC:      -49.5206d {-49d 31' 13"} (J2000)
GRB_ERROR2_RA1:    322.9615d {+21h 31m 51s} (J2000)
GRB_ERROR2_DEC1:   -49.4448d {-49d 26' 40"} (J2000)
GRB_ERROR2_RA2:    321.9313d {+21h 27m 44s} (J2000)
GRB_ERROR2_DEC2:   -49.3509d {-49d 21' 02"} (J2000)
GRB_ERROR2_RA3:    325.3800d {+21h 41m 31s} (J2000)
GRB_ERROR2_DEC3:   -49.7971d {-49d 47' 49"} (J2000)
GRB_ERROR2_RA4:    323.5920d {+21h 34m 22s} (J2000)
GRB_ERROR2_DEC4:   -49.6089d {-49d 36' 31"} (J2000)
GRB_ERROR:         48.17 [arcmin radius of circumscribing circle, 3 sigma]
GRB_BOX_AREA:      410 [sq.arcmin]
GRB_PEAK_FLUX:     3.5e-06 [erg/cm2/sec in 25-100 keV] in a 0.25 sec interval
GRB_FLUENCE:       1.4e-05 [erg/cm2 in 25-100 keV]
GRB_DURATION:      8.0 [sec]
SUN_POSTN:         289.38d {+19h 17m 30s}  -22.24d {-22d 14' 37"}
SUN_DIST:           43.16 [deg]
MOON_POSTN:         83.09d {+05h 32m 21s}  +21.37d {+21d 22' 27"}
MOON_DIST:         120.01 [deg]
COMMENTS:          IPN triangulation localization.  
COMMENTS:          These are preliminary, 3 sigma error boxes.  
COMMENTS:          GCN message is being issued.

GCN notice #912
K. Hurley, on behalf of the Ulysses GRB team, T. Cline, on behalf of the Konus-Wind and NEAR GRB teams, and E. Mazets, and S. Golenetskii, on behalf of the KONUS-WIND and KONUS-A GRB teams, report:
Ulysses, NEAR, KONUS-A and KONUS-WIND observed this GRB at 09485 seconds. As observed by Ulysses and KONUS-A, it had a duration of approximately 8. seconds, a 25-100 keV fluence of approximately 1.4E-05 erg/cm2, and a peak flux of approximately 3.5E-06 erg/cm2 s over 0.25 seconds. Emission was observed up to 5 MeV.
We have triangulated it to two alternate, preliminary, 3 sigma error boxes each with approximate area 410. sq. arcmin. whose coordinates are:
```
 ERROR BOX CENTER:   22 h  5 m 29.37 s    -50 o 31 '  55.57 " 
 ERROR BOX CORNER 1: 22 h  6 m 49.37 s    -50 o 31 '  49.45 " 
 ERROR BOX CORNER 2: 22 h 10 m 57.99 s    -50 o 41 '  32.36 " 
 ERROR BOX CORNER 3: 21 h 56 m 52.46 s    -50 o 16 '  26.78 " 
 ERROR BOX CORNER 4: 22 h  4 m  2.91 s    -50 o 31 '  49.57 " 

 ERROR BOX CENTER:   21 h 33 m  3.22 s    -49 o 31 '  30.75 " 
 ERROR BOX CORNER 1: 21 h 31 m 50.78 s    -49 o 26 '  41.41 " 
 ERROR BOX CORNER 2: 21 h 27 m 43.53 s    -49 o 21 '   3.49 " 
 ERROR BOX CORNER 3: 21 h 41 m 31.20 s    -49 o 47 '  49.65 " 
 ERROR BOX CORNER 4: 21 h 34 m 22.10 s    -49 o 36 '  32.11 "
```
There is a chance that the ambiguity can be resolved by further processing. These error boxes may be improved.

GCN notice #913
S. Golenetskii reports that a comparison of Konus-Wind and Konus-A data on this burst indicates that the arrival direction is only consistent with the second position given in GCN 912, namely

 ERROR BOX CENTER:   21 h 33 m  3.22 s    -49 o 31 '  30.75 " 
 ERROR BOX CORNER 1: 21 h 31 m 50.78 s    -49 o 26 '  41.41 " 
 ERROR BOX CORNER 2: 21 h 27 m 43.53 s    -49 o 21 '   3.49 " 
 ERROR BOX CORNER 3: 21 h 41 m 31.20 s    -49 o 47 '  49.65 " 
 ERROR BOX CORNER 4: 21 h 34 m 22.10 s    -49 o 36 '  32.11 "

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Jochen Greiner, last update: 15-Jan-2001 [Disclaimer]