Gamma-ray Burst 030519

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE


TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 19 May 03 14:05:30 UT
NOTICE_TYPE:    HETE S/C_Alert
TRIGGER_NUM:    2716,   Seq_Num: 1
GRB_DATE:       12778 TJD;   139 DOY;   03/05/19
GRB_TIME:       50693.57 SOD {14:04:53.57} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     225  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       197 [deg]
SC_-Z_DEC:       -9 [deg]
SC_LONG:        146 [deg East]
WXM_CNTR_RA:    224.576d {+14h 58m 18s} (J2000),
                224.628d {+14h 58m 31s} (current),
                223.810d {+14h 55m 14s} (1950)
WXM_CNTR_DEC:   -32.950d {-32d 56' 57"} (J2000),
                -32.963d {-32d 57' 45"} (current),
                -32.750d {-32d 44' 59"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 1.5 Y= 3.7 [sig/noise]
WXM_LC_SN:      X= 2.2 Y= 6.7 [sig/noise]
SUN_POSTN:       55.94d {+03h 43m 47s}  +19.76d {+19d 45' 27"}
SUN_DIST:       163.38 [deg]
MOON_POSTN:     287.46d {+19h 09m 51s}  -26.25d {-26d 14' 46"}
MOON_DIST:       54.25 [deg]
MOON_ILLUM:     84 [%]
GAL_COORDS:     331.52,22.79 [deg] galactic lon,lat of the burst
ECL_COORDS:     231.69,-15.35 [deg] ecliptic lon,lat of the burst
COMMENTS:       Probable GRB.
COMMENTS:       WXM error box is circular; not rectangular.
COMMENTS:       WXM S/N is less than a reasonable value.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE  
NOTICE_DATE:    Mon 19 May 03 14:07:20 UT
NOTICE_TYPE:    HETE S/C_Update
TRIGGER_NUM:    2716,   Seq_Num: 2
GRB_DATE:       12778 TJD;   139 DOY;   03/05/19
GRB_TIME:       50693.57 SOD {14:04:53.57} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     225  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       197 [deg]
SC_-Z_DEC:       -9 [deg]
SC_LONG:        146 [deg East] 
WXM_CNTR_RA:    224.576d {+14h 58m 18s} (J2000),
                224.628d {+14h 58m 31s} (current),
                223.810d {+14h 55m 14s} (1950)
WXM_CNTR_DEC:   -32.950d {-32d 56' 57"} (J2000),
                -32.963d {-32d 57' 45"} (current),
                -32.750d {-32d 44' 59"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 1.5 Y= 3.7 [sig/noise]
WXM_LC_SN:      X= 2.2 Y= 6.7 [sig/noise]
SUN_POSTN:       55.94d {+03h 43m 47s}  +19.76d {+19d 45' 27"}
SUN_DIST:       163.38 [deg]
MOON_POSTN:     287.46d {+19h 09m 51s}  -26.25d {-26d 14' 46"}
MOON_DIST:       54.25 [deg] 
MOON_ILLUM:     84 [%]
GAL_COORDS:     331.52,22.79 [deg] galactic lon,lat of the burst
ECL_COORDS:     231.69,-15.35 [deg] ecliptic lon,lat of the burst
COMMENTS:       Probable GRB.
COMMENTS:       WXM error box is circular; not rectangular.
COMMENTS:       WXM S/N is less than a reasonable value.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE  
NOTICE_DATE:    Mon 19 May 03 14:08:18 UT
NOTICE_TYPE:    HETE S/C_Last
TRIGGER_NUM:    2716,   Seq_Num: 3
GRB_DATE:       12778 TJD;   139 DOY;   03/05/19
GRB_TIME:       50693.57 SOD {14:04:53.57} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     225  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       197 [deg]
SC_-Z_DEC:       -9 [deg]
SC_LONG:        146 [deg East] 
WXM_CNTR_RA:    224.576d {+14h 58m 18s} (J2000),
                224.628d {+14h 58m 31s} (current),
                223.810d {+14h 55m 14s} (1950)
WXM_CNTR_DEC:   -32.950d {-32d 56' 57"} (J2000),
                -32.963d {-32d 57' 45"} (current),
                -32.750d {-32d 44' 59"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 1.5 Y= 3.7 [sig/noise]
WXM_LC_SN:      X= 2.2 Y= 6.7 [sig/noise]
SUN_POSTN:       55.94d {+03h 43m 47s}  +19.76d {+19d 45' 27"}
SUN_DIST:       163.38 [deg]
MOON_POSTN:     287.46d {+19h 09m 51s}  -26.25d {-26d 14' 46"}
MOON_DIST:       54.25 [deg] 
MOON_ILLUM:     84 [%]
GAL_COORDS:     331.52,22.79 [deg] galactic lon,lat of the burst
ECL_COORDS:     231.69,-15.35 [deg] ecliptic lon,lat of the burst
COMMENTS:       Probable GRB.
COMMENTS:       WXM error box is circular; not rectangular.
COMMENTS:       WXM S/N is less than a reasonable value.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 19 May 03 15:44:46 UT 
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    2716,   Seq_Num: 4
GRB_DATE:       12778 TJD;   139 DOY;   03/05/19
GRB_TIME:       50693.56 SOD {14:04:53.56} UT 
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     225  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       196 [deg]
SC_-Z_DEC:       -9 [deg]
SC_LONG:        146 [deg East] 
WXM_CNTR_RA:    239.758d {+15h 59m 02s} (J2000),
                239.812d {+15h 59m 15s} (current),  
                238.959d {+15h 55m 50s} (1950)
WXM_CNTR_DEC:   -33.488d {-33d 29' 18"} (J2000),
                -33.498d {-33d 29' 52"} (current),
                -33.347d {-33d 20' 47"} (1950)
WXM_CORNER1:    242.4730 -33.2740 [deg]
WXM_CORNER2:    242.4220 -33.5610 [deg]
WXM_CORNER3:    237.1020 -33.4069 [deg]
WXM_CORNER4:    237.0340 -33.7120 [deg] 
WXM_MAX_SIZE:   273.30 [arcmin] diameter  
WXM_LOC_SN:     12 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 0.0 Y= 5.1 [sig/noise]
WXM_LC_SN:      X= 3.3 Y= 12.4 [sig/noise]
SUN_POSTN:       55.94d {+03h 43m 47s}  +19.76d {+19d 45' 27"}
SUN_DIST:       165.83 [deg]
MOON_POSTN:     287.46d {+19h 09m 51s}  -26.25d {-26d 14' 46"}
MOON_DIST:       41.59 [deg]
MOON_ILLUM:     84 [%]
GAL_COORDS:     341.97,14.81 [deg] galactic lon,lat of the burst
ECL_COORDS:     244.50,-12.69 [deg] ecliptic lon,lat of the burst
COMMENTS:       Definite GRB.
COMMENTS:       WXM S/N is less than a reasonable value.
COMMENTS:       Burst_Validity flag is true.
COMMENTS:       WXM data refined since S/C_Last Notice.

GCN notice #2235
D. Lamb, G. Ricker, J-L Atteia, N. Kawai, and S. Woosley on behalf of the HETE Science Team;
J. Doty, R. Vanderspek, G. Crew, J. Villasenor, G. Monnelly, N. Butler, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams;
Y. Shirasaki, C. Graziani, T. Donaghy, M. Matsuoka, M. Suzuki, T. Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, Y. Nakagawa, D. Takahashi, R. Satoh, and Y. Urata, on behalf of the HETE WXM Team;
M. Boer, J-F Olive, J-P Dezalay, C. Barraud and K. Hurley on behalf of the HETE FREGATE Team;
write:
At 14:04:53.56 UTC (50693.56 UT) on 3 May 2003, the HETE FREGATE and WXM instruments detected event H2716, a long, bright GRB.
The burst triggered FREGATE in the 30-400 keV energy band. The WXM flight software detected the GRB and calculated a location, which was reported in a GCN Notice at 14:05:30 UT. However, the direction of the burst source was such that it illuminated only the Y-detector. Consequently, the WXM flight localization was incorrect.
Ground analysis of the WXM data produced a localization that was reported in a GCN Notice at 15:44:46 UT, 100 minutes after the burst. The WXM ground localization SNR was 12. The localization can be expressed as a 90% confidence rectangle which is 24 arcminutes in width and 4.5 degrees in length. The coordinates of the center of the rectangle are
WXM-Ground: R.A. = +15h 59m 02s, Dec. = -33d 29' 18" (J2000),
and the corners of the rectangle lie at:
```
R.A. = 16h 09m 54s, Dec. = -33d 16' 26",
R.A. = 16h 09m 41s, Dec. = -33d 33' 40",
R.A. = 15h 48m 24s, Dec. = -33d 24' 25",
R.A. = 15h 48m 08s, Dec. = -33d 42' 43" (J2000).
```
The width of the rectangle corresponds to the localization of the burst in the Y-camera, and the length of the rectangle corresponds to the the constraints on the X location of the burst deduced from the illumination pattern on the wires of the Y-detector.
The T_90 duration of the burst in the 30-400 keV band was > 10 s.
A light curve and skymap for GRB030519B will soon be provided at the following URL: http://space.mit.edu/HETE/Bursts/GRB030519B
GCN notice #2237
K. Hurley and T. Cline, on behalf of the Ulysses and HETE GRB teams,
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R. Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB team, and
D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wiggger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, report:
Ulysses and RHESSI also observed this burst (GCN 2235), As observed by Ulysses, it had a duration of approximately 12 seconds, a 25-100 keV fluence of approximately 2.9E-05 erg/cm2, and a peak flux of approximately 4.3E-06 erg/cm2 s over 0.50 seconds.
We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 331.653, -35.097 degrees, whose radius is 71.871 +/- 0.018 degrees (3 sigma). This annulus intersects the HETE WXM error box and reduces its area to ~35 square arcminutes. The coordinates of the IPN/WXM error box are:
```
ERROR BOX CENTER  : 241.152     -33.473
ERROR BOX CORNER 1: 241.020     -33.623
ERROR BOX CORNER 2: 241.073     -33.621
ERROR BOX CORNER 3: 241.231     -33.325
ERROR BOX CORNER 4: 241.284     -33.323
```
This error box may be improved.
GCN notice #2238
D. Lamb, G. Ricker, J-L Atteia, N. Kawai, and S. Woosley on behalf of the HETE Science Team;
C. Barraud, M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE FREGATE Team;
J. Doty, R. Vanderspek, G. Crew, J. Villasenor, G. Monnelly, N. Butler, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams;
Y. Shirasaki, C. Graziani, T. Donaghy, M. Matsuoka, M. Suzuki, T. Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, Y. Nakagawa, D. Takahashi, R. Satoh, and Y. Urata, on behalf of the HETE WXM Team;
write:
From an analysis of the HETE FREGATE data for GRB030519B (=H2716), we find that the peak flux over 5 s is ~ 8 x 10^-7 erg cm-2 s-1 in the 7-30 keV energy band and ~ 7 x 10^-6 erg cm-2 s-1 in the 30-400 keV energy band. Similarly, we find that the fluence of the burst is 7 x 10^-6 erg cm^-2 in the 7-30 keV energy band and ~ 6 x 10^-5 erg cm-2 in the 30-400 keV energy band. Thus this burst is bright and its fluence is large (the latter is in the top 1% of those for all BATSE bursts). In addition, a preliminary spectral analysis of the FREGATE data indicates that the spectral slope of the burst at high (> 100 keV) energies is > -2, and thus E_peak > 400 keV.
In GCN Circular 2235 (Lamb et al. 2003), the date of the burst was reported as 3 May 2003 and the width of the WXM localization rectangle was reported as 24 arcminutes. These are incorrect; the date of the burst is 19 May 2003 and the width of the localization rectangle is 17.4 arcminutes. Neither affect the WXM or the HETE/IPN error boxes reported in GCNs 2235 (Lamb et al. 2003) and 2237 (Hurley et al. 2003); the size of the latter is ~35 square arcminutes.
Follow-up observations of this burst are strongly encouraged.
GCN notice #2263
J. Gorosabel (IAA-CSIC/STScI), A. Levan (U. Leicester/STScI), A. de Ugarte Postigo (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), A. Fruchter (STScI), S. Guziy (IAA-CSIC), J.M. Castro Cer=F3n (STScI), A. Guijarro (CAHA), A. Aguirre (CAHA), M. Alises (CAHA) report:
"We have carried out observations of the central part (coverage ~75%) of the GRB 030519B (GCN 2235) error box, in four optical bands, with the 2.2m (+BUSCA) telescope at the=20 Observatorio de Calar Alto. Three of these four bands are non standard and calibration is still pending. The fourth one=20 corresponds to Ic, with photometry as follows:
```
 ---------------------------------------------
      Date               Texp   Seeing  Lim. Mag.
      (May 2003 UT)      (s)     (")    (3 sigma)
 ---------------------------------------------
     21.03872--21.06376  3x600   2.0      23.3
     21.99519--22.07959  7x600   2.2      23.5
     22.98905--23.07625  5x900   3.1      23.3
     24.00387--24.03936  3x900   2.3      23.3
 ---------------------------------------------
```
PSF matched subtraction did not reveal any reliable afterglow candidate brighter than Ic ~ 23, implying that this burst likely belongs to the dark GRB class."
This message may be cited.

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Jochen Greiner, last update: 02-Jun-2003 [Disclaimer]