- GCN/BACODINE POSITION NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 01 Mar 09 06:56:11 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 344582, Seg_Num: 0
GRB_RA: 338.140d {+22h 32m 34s} (J2000),
338.248d {+22h 33m 00s} (current),
337.552d {+22h 30m 13s} (1950)
GRB_DEC: +26.642d {+26d 38' 32"} (J2000),
+26.689d {+26d 41' 22"} (current),
+26.384d {+26d 23' 03"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 9699 [cnts] Image_Peak=997 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 148 E_range: 25-100 keV
BKG_INTEN: 31402 [cnts]
BKG_TIME: 24939.46 SOD {06:55:39.46} UT
BKG_DUR: 8 [sec]
GRB_DATE: 14891 TJD; 60 DOY; 09/03/01
GRB_TIME: 24955.14 SOD {06:55:55.14} UT
GRB_PHI: -61.91 [deg]
GRB_THETA: 35.30 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 95.33 [sigma]
IMAGE_SIGNIF: 21.68 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +7 -100 +0 -82 +0
SUN_POSTN: 342.30d {+22h 49m 12s} -7.51d {-07d 30' 27"}
SUN_DIST: 34.42 [deg] Sun_angle= 0.3 [hr] (West of Sun)
MOON_POSTN: 27.85d {+01h 51m 24s} +17.00d {+17d 00' 13"}
MOON_DIST: 46.76 [deg]
MOON_ILLUM: 19 [%]
GAL_COORDS: 88.19,-26.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 351.30, 32.94 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 122.13,6.01 [deg].
- red DSS finding chart
ps-file
- GCN NOTICE
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Sun 01 Mar 09 06:57:15 UT
NOTICE_TYPE: INTEGRAL SPI ACS Trigger
TRIGGER_NUM: 5475, Sub_Num: 0
GRB_INTEN: 9.32 [sigma]
GRB_TIME: 24950.34 SOD {06:55:50.34} UT
GRB_DATE: 14891 TJD; 60 DOY; 09/03/01
COMMENTS: INTEGRAL SPI_ACS GRB Trigger.
COMMENTS: ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2009-03-01T06-55-50.1647-17710-00007-0.lc
- GCN NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 01 Mar 09 06:59:31 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 344582, Seg_Num: 0
GRB_RA: 338.140d {+22h 32m 34s} (J2000),
338.248d {+22h 33m 00s} (current),
337.552d {+22h 30m 13s} (1950)
GRB_DEC: +26.642d {+26d 38' 32"} (J2000),
+26.689d {+26d 41' 22"} (current),
+26.384d {+26d 23' 03"} (1950)
GRB_DATE: 14891 TJD; 60 DOY; 09/03/01
GRB_TIME: 24955.14 SOD {06:55:55.14} UT
TRIGGER_INDEX: 148
GRB_PHI: -61.91 [deg]
GRB_THETA: 35.30 [deg]
DELTA_TIME: 32.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 95.33 [sigma]
IMAGE_SIGNIF: 21.68 [sigma]
LC_URL: sw00344582000msb.lc
SUN_POSTN: 342.30d {+22h 49m 13s} -7.51d {-07d 30' 24"}
SUN_DIST: 34.42 [deg] Sun_angle= 0.3 [hr] (West of Sun)
MOON_POSTN: 27.88d {+01h 51m 32s} +17.02d {+17d 00' 54"}
MOON_DIST: 46.78 [deg]
MOON_ILLUM: 19 [%]
GAL_COORDS: 88.19,-26.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 351.30, 32.94 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Lightcurve.
COMMENTS:
COMMENTS: The next comments were copied from the BAT_POS Notice:
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 122.13,6.01 [deg].
- GCN Circular #8920
L. Vetere (PSU), C. Gronwall (PSU), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL),
T. Sakamoto (NASA/UMBC), M. H. Siegel (PSU) and M. C. Stroh (PSU)
report on behalf of the Swift Team:
At 06:55:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 090301 (trigger=344582). Swift could not slew to the burst
due to its proximity to the Sun (34 degrees). The BAT on-board
calculated location is
RA, Dec 338.140, +26.642 which is
RA(J2000) = 22h 32m 34s
Dec(J2000) = +26d 38' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a complex multiple-peak
structure with a duration of about 50 sec. The peak count rate
was ~20,0000 counts/sec (15-350 keV), at ~23 sec after the trigger.
Due to an observing constraint, Swift cannot slew to the BAT position.
There will thus be no XRT or UVOT data for this trigger. The source
will become observable again after April 15th.
Burst Advocate for this burst is L. Vetere (vetere AT astro.psu.edu).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
- GCN Circular #8923
E. E. Fenimore (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC),
T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU),
J. Tueller (GSFC), T. N. Ukwatta (GWU), L. Vetere (PSU)
(i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 090301A (trigger #344582)
(Vetere, et al., GCN Circ. 8920). The BAT ground-calculated position is
RA, Dec = 338.142, 26.639 deg, which is
RA(J2000) = 22h 32m 34.2s
Dec(J2000) = +26d 38' 19.0"
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 35%.
The mask-weighted light curve shows a complex of overlapping and separated
peaks starting at ~T-20 sec and ending some time after T+86 sec
at which time the burst location went ouf out the BAT FOV when Swift slewed
to the next planned target. Given that the burst location will not come out
of the Sun observing consrtaint until after April 15, we will not have
any further data on this burst. T90 (15-350 keV) is 41.0 +- 2.2 sec
(estimated error including systematics).
The time-averaged spectrum from T-17.0 to T+72.2 sec is best fit by a power law
with an exponential cutoff. This fit gives a photon index 1.08 +- 0.12,
and Epeak of 343.3 +- 328.8 keV (chi squared 37.39 for 56 d.o.f.). For this
model the total fluence in the 15-150 keV band is 2.3 +- 0.03 x 10^-5 erg/cm2
and the 1-sec peak flux measured from T+23.07 sec in the 15-150 keV band is
18.7 +- 0.6 ph/cm2/sec. A fit to a simple power law gives a photon index
of 1.25 +- 0.03 (chi squared 43.70 for 57 d.o.f.). All the quoted errors
are at the 90% confidence level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/344582/BA/
- GCN Circular #8924
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P.
Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind
team, report:
The bright long GRB 090301A (Swift-BAT trigger #344582: Vetere et al.,
GCN 8920; Fenimore et al., GCN 8923) triggered Konus-Wind at
T0=24949.694 s UT (06:55:49.694).
The burst light curve shows a multipeaked structure with a duration of
~50 s, followed by a weak tail marginally seen up to ~T0+200 s.
As observed by Konus-Wind the burst
had a fluence of (1.13 +/- 0.08)x10^-4 erg/cm2,
and a 64-ms peak flux measured from T0+25.408 s
of (1.51 +/- 0.23)x10^-5 erg/cm2/s
(both in the 20 keV - 5 MeV energy range).
The time-integrated spectrum of the burst
(from T0 to T0+44.032 s) is well fitted (in the 20 keV - 5 MeV
range) by GRB (Band) model for which:
the low-energy photon index alpha = -0.87 +/- 0.05,
the high energy photon index beta = -2.65(-0.47, +0.25),
the peak energy Ep = 429(-32, +34) keV (chi2 = 77.5/76 dof).
All the quoted errors are at the 90% confidence level.
The Konus-Wind light curve of this GRB is available
at http://www.ioffe.ru/LEA/GRBs/GRB090301_T24949/
- GCN Report 198.1
GCN_Report 198.1 has been posted:
http://gcn.gsfc.nasa.gov/reports/report_198_1.pdf
by L.Vetere
at PSU
titled: "Final Swift Observations of GRB 090301A"
- GCN Circular #8929
T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo),
Y. Hanabata, Y. Fukazawa, T. Takahashi, T. Uehara, C. Kira (Hiroshima U.),
Y. Terada, M. Tashiro, Y. Urata, A. Endo, K. Onda, N. Kodaka,
K. Morigami, T. Sugasahara, W. Iwakiri (Saitama U.), M. Ohno,
M. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA), K. Yamaoka,
S. Sugita (Aoyama Gakuin U.), Y.E. Nakagawa, T. Tamagawa (RIKEN),
E. Sonoda, M. Yamauchi, H. Tanaka, R. Hara, N. Ohmori, K. Kono,
H. Hayashi (Univ. of Miyazaki), S. Hong (Nihon U.),
N. Vasquez (Tokyo Tech), on behalf of the Suzaku WAM team, report:
The bright long GRB 090301A (Swift/BAT trigger #344582; Fenimore et al., GCN 8923)
triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers
an energy range of 50 keV - 5 MeV at 06:55:50.862 UT (=T0).
The observed light curve shows a multi-peaked structure lasting from T0-2s
to T0+48s with a duration (T90) of about 35 seconds. The fluence in 100 -
1000 keV was 6.9(-0.5, +0.1) x 10^-5 erg/cm^2. The 1-s peak flux measured
from T0+27 was 14.8(+/-0.9) photons/cm^2/s in the same energy range.
Preliminary result shows that the time-averaged spectrum from
T0-2s to T0+48s is fitted by a GRB Band model as follows.
the low-energy photon index alpha: -0.93 (-0.16, +0.18),
the high-energy photon index beta: -2.82 (-0.74, +0.29),
the break energy E0: 536 (-101, +131) keV,
and the peak energy Epeak: 574 +/- 170 keV (chi^2/d.o.f = 68/56).
Due to the high counting rate of this GRB, a 1% systematic error
was added for low energy channels.
All the quoted errors are at the 90% confidence level.
The light curves for this burst are available at:
http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html
Previous IAU Circulars 