- GCN/BACODINE POSITION NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 10 Apr 09 16:58:10 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 348929, Seg_Num: 0
GRB_RA: 334.980d {+22h 19m 55s} (J2000),
335.093d {+22h 20m 22s} (current),
334.372d {+22h 17m 29s} (1950)
GRB_DEC: +15.471d {+15d 28' 16"} (J2000),
+15.518d {+15d 31' 04"} (current),
+15.219d {+15d 13' 10"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 4710 [cnts] Image_Peak=211 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 30490 [cnts]
BKG_TIME: 61059.35 SOD {16:57:39.35} UT
BKG_DUR: 8 [sec]
GRB_DATE: 14931 TJD; 100 DOY; 09/04/10
GRB_TIME: 61072.85 SOD {16:57:52.85} UT
GRB_PHI: -57.83 [deg]
GRB_THETA: 4.37 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 12.20 [sigma]
IMAGE_SIGNIF: 7.82 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 -2 -100 +0 -72 +0
SUN_POSTN: 19.36d {+01h 17m 26s} +8.18d {+08d 10' 37"}
SUN_DIST: 43.86 [deg] Sun_angle= 3.0 [hr] (West of Sun)
MOON_POSTN: 210.06d {+14h 00m 15s} -17.59d {-17d 35' 13"}
MOON_DIST: 127.45 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 77.57,-33.74 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 342.95, 24.01 [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 = 241.39,10.80 [deg].
- red DSS finding chart
ps-file
- GCN NOTICE
TITLE: GCN/SIMBAD_NED NOTICE
NOTICE_DATE: Fri Apr 10 16:58:16 UTC 2009
NOTICE_TYPE: Swift-BAT Position search
TRIGGER_NUM: 348929
RA: 334.9798 (J2000)
DEC: 15.4711 (J2000)
SIMBAD search for BAT_RA,Dec=334.9798,15.4711,radius=10.0arcmin
Num RA Dec Name Type Num_Pub Distance
1 335.09537500 15.54230556 2MASX J22202293+1532328 G 0 7.93
2 335.09537500 15.54230556 2MASX J22202293+1532328 G 0 7.93
NED search for BAT_RA,Dec=334.9798,15.4711,radius=10.0arcmin
Num RA Dec Name Type Distance
1 335.020167 15.413556 NVSS J222004+152448 , RadioS 4.20
2 334.879417 15.500528 NVSS J221931+153001 , RadioS 6.10
3 335.095382 15.542313 CGCG 429-002 , G 7.90
4 334.875500 15.580111 NVSS J221930+153448 , RadioS 8.90
5 335.089500 15.581333 2MASX J22202148+1534528 , IrS 9.20
6 334.896875 15.604028 NVSS J221935+153614 , RadioS 9.30
7 335.118917 15.393111 NVSS J222028+152335 , RadioS 9.30
- GCN NOTICE
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Fri 10 Apr 09 16:58:44 UT
NOTICE_TYPE: INTEGRAL SPI ACS Trigger
TRIGGER_NUM: 5500, Sub_Num: 0
GRB_INTEN: 9.58 [sigma]
GRB_TIME: 61078.82 SOD {16:57:58.82} UT
GRB_DATE: 14931 TJD; 100 DOY; 09/04/10
COMMENTS: INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2009-04-10T16-57-58.7946-24033-00007-0.lc
- GCN NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 10 Apr 09 17:01:20 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 348929, Seg_Num: 0
GRB_RA: 334.980d {+22h 19m 55s} (J2000),
335.093d {+22h 20m 22s} (current),
334.372d {+22h 17m 29s} (1950)
GRB_DEC: +15.471d {+15d 28' 16"} (J2000),
+15.518d {+15d 31' 04"} (current),
+15.219d {+15d 13' 10"} (1950)
GRB_DATE: 14931 TJD; 100 DOY; 09/04/10
GRB_TIME: 61072.85 SOD {16:57:52.85} UT
TRIGGER_INDEX: 146
GRB_PHI: -57.83 [deg]
GRB_THETA: 4.37 [deg]
DELTA_TIME: -70.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 12.20 [sigma]
IMAGE_SIGNIF: 7.82 [sigma]
LC_URL: sw00348929000msb.lc
SUN_POSTN: 19.36d {+01h 17m 27s} +8.18d {+08d 10' 40"}
SUN_DIST: 43.86 [deg] Sun_angle= 3.0 [hr] (West of Sun)
MOON_POSTN: 210.09d {+14h 00m 22s} -17.60d {-17d 35' 48"}
MOON_DIST: 127.43 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 77.57,-33.74 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 342.95, 24.01 [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 = 241.39,10.80 [deg].
- GCN Circular #9122
D. Grupe (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
N. P. M. Kuin (MSSL), K. L. Page (U Leicester), D. M. Palmer (LANL),
J. L. Racusin (PSU), M. H. Siegel (PSU), M. Stamatikos (NASA/ORAU),
M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of
the Swift Team:
At 16:57:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 090410 (trigger=348929). Swift could not slew to the GRB
due to a Sun constraint. The BAT on-board calculated location is
RA, Dec 334.980, +15.471 which is
RA(J2000) = 22h 19m 55s
Dec(J2000) = +15d 28' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a complex peak
from T-10 to T+40, followed by another broad peak from T+80 to T+140.
The peak count rate was ~6000 counts/sec (15-350 keV), at ~6
sec after the trigger.
Swift cannot slew to the BAT position. The burst is sun-constrained
until Tuesday, 2009 April 14. There will thus be no XRT or UVOT
data for this trigger.
Burst Advocate for this burst is D. Grupe (grupe 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 #9123
S.D. Barthelmy (GSFC), W.H. Baumgartner (GSFC/UMBC), J.R. Cummings (GSFC/UMBC),
E.E. Fenimore (LANL), N. Gehrels (GSFC), D. Grupe (PSU),
H.A. Krimm (GSFC/USRA), C.B. Markwardt (GSFC/UMD), D.M. Palmer (LANL),
T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU),
J. Tueller (GSFC), T. N. Ukwatta (GWU)
(i.e. the Swift-BAT team):
Using the data sets from T-240 to T+963 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 090410 (trigger #348929)
(Grupe, et al., GCN Circ. 9122). The BAT ground-calculated position is
RA, Dec = 334.956, 15.419 deg, which is
RA(J2000) = 22h 19m 49.4s
Dec(J2000) = +15d 25' 08.6"
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
The mask-weighted light curve shows two main peaks with some precursor activity.
The precursor activity starts at ~T-55 sec. And because the target location
only came into the BAT FOV at T-110 sec, there may have been even earlier activity.
The first main peak started at ~T-10 sec, peaked at ~T+7 sec, and ended
around T+45 sec. The second main peak started at ~T+80 sec, peaked at ~T+120 sec,
and returned to baseline T+170 sec. The burst location left the BAT FOV
at ~T+390 sec. T90 (15-350 keV) is 165 +- 8 sec (estimated error
including systematics).
The time-averaged spectrum from T-49.2 to T+139.4 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.19 +- 0.05. The fluence in the 15-150 keV band is 5.6 +- 0.2 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+8.90 sec in the 15-150 keV band
is 1.9 +- 0.1 ph/cm2/sec. 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/348929/BA/
- GCN Circular #9126
M. Yoshida, D. Kuroda, K. Yanagisawa, Y. Shimizu, S. Nagayama,
H. Toda (OAO, NAOJ) and N. Kawai (Tokyo Tech) report on behalf
of the MITSuME collaboration:
We observed the field of GRB 090410 (Grupe et al. GCN 9122;
Barthelmy et al. GCN 9123) with optical three color (g', Rc and
Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama
Astrophysical Observatory. We started the observation at 18:12:59
UT, 4507s after the alert. We did not detect any new point source
within the BAT error circle (Barthelmy et al. GCN 9123). 3-sigma
upper limits to our observation are listed below. We used GSC2.3
catalog for flux calibration.
Mid-UT Td EXP-T g' Rc Ic
-------------------------------------------------------------
2009-04-10 18:57:15 7163sec 72x60sec >17.9 >18.1 >18.5
-------------------------------------------------------------
- GCN Circular #9128
P. Afonso, T. Kruehler, A. Rau and J. Greiner (MPE Garching), report on
behalf of the GROND team:
GROND (Greiner et al. 2008, PASP 120, 405), the 7-channel imager mounted at
the 2.2m ESO/MPI telescope at La Silla Observatory (Chile) started
follow-up observations of GRB 090410 (Grupe et al. 2009, GCN #9122) on April
11, at 10:17 UTC (17.3 h after the burst). In addition, a second epoch of
imaging was obtained, which started on April 12, 10:10 UTC.
Observations were performed at high airmass (~2.5) and limited to a total
of 4 min exposures in each J, H and K in both epochs because of Sun
constraints.
We do not detect any new object with respect to 2MASS inside the enhanced
BAT error circle (Barthelmy et al. 2009, GCN #9123), and image subtraction
between the two epochs does not reveal any obvious variable source. Upper
limits from the first observation are as follows (all in the AB system):
J > 19.1 mag
H > 19.0 mag
K > 18.1 mag
The upper limits have been obtained using 2MASS field stars as reference.
The given magnitudes are not corrected for the expected Galactic foreground
extinction of E(B-V) of 0.05 mag.
- GCN Report 205.1
GCN_Report 205.1 has been posted:
http://gcn.gsfc.nasa.gov/reports/report_205_1.pdf
by D. Grupe
at PSU
titled: "Final results on Swift GRB 090410"
- GCN Circular #9129
W. Iwakiri, M. Tashiro, Y. Terada, A. Endo, K. Onda,
T. Sugasahara (Saitama U.), Y. Urata (NCU),
M. Ohno, M. Suzuki, M. Kokubun, T. Takahashi (ISAS/JAXA),
T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo),
K. Yamaoka, S. Sugita (Aoyama Gakuin U.), Y. E. Nakagawa, T. Tamagawa
(RIKEN),
T. Uehara, T. Takahashi, Y. Fukazawa, Y. Hanabata (Hiroshima U.),
E. Sonoda, M. Yamauchi, 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 long GRB 090410 (Swift/BATtrigger #348929 ; Grupe et al.,
GCN 9122) triggered the Suzaku Wide-band All-sky Monitor (WAM)
which covers an energy range of 50 keV - 5 MeV at 16:57:53.392 UT
(=T0).
The observed light curve shows main peaks starting at T0-5s, ending
at T0+25s, followed by a long weak tail seen up to T0+150s. And the
precursor activity reported by Swift/BAT (Barthelmy et al., GCN 9123)
is also seen at T0-55s. The total T90 duration including this precursor
is about 166 seconds. The fluence in 100 - 1000 keV was 1.2 +/- 0.3 x
10^-5 erg/cm^2. The 1-s scaled peak flux measured from T0+5s was 3.0
(-0.3, +0.2)
photons/cm^2/s in the same energy range.
Preliminary result shows that the time-averaged spectrum from T0-60s to
T0+150s is well fitted by a single power-law with a photon index
of 2.3 (-0.3, +0.3) (chi^2/d.o.f = 4.9/8), and the spectrum of the main
bright peak from T0-5s to T0+25s is well fitted by a power-law with
exponential cutoff model:
dN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with
alpha 1.3 +/-0.5, and
Epeak 304 (-79, +60) keV (chi^2/d.o.f. = 7.9/7).
All the quoted errors are at statistical 90% confidence level,
in which the systematic uncertainties are not included.
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
- GCN Circular #9189
K. Kinugasa, S. Honda, O. Hashimoto, H. Takahashi, H. Taguchi
(Gunma Astronomical Observatory) report:
The field of GRB 090410 (Grupe et al. GCN 9122) was observed
with the 150 cm telescope of the Gunma Astronomical Observatory.
Starting at 18:33 UT (1.60 hours after the trigger), Rc and Ic frames
were acquired for 3 x 3-min and 5 x 3-min exposures under a high airmass
(sec z ~3) condition.
We did not detect any new point source within the ground-calculated
BAT error circle (Barthelmy et al. GCN 9123) to limiting magnitudes
of Rc=19.0 and Ic=19.0 relative to USNO-B1.0 R2 and I magnitudes at the
meantime of 18:41 UT and 18:56 UT, respectively.
- GCN Circular #9193
K.Kinugasa et al. (Gunma Astronomical Observatory);
I also made a typo in GCN 9189. We observed "GRB 090410 (Grupe et al.
GCN 9122)" instead of "GRB 080410" in subject.
I apologize for my carelessness.
Previous IAU Circulars 