Gamma-ray Burst 101129A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 29 Nov 10 15:39:35 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     312737973
GRB_RA:          153.467d {+10h 13m 52s} (J2000),
                 153.597d {+10h 14m 23s} (current),
                 152.869d {+10h 11m 29s} (1950)
GRB_DEC:         -18.950d {-18d 56' 59"} (J2000),
                 -19.004d {-19d 00' 15"} (current),
                 -18.702d {-18d 42' 05"} (1950)
GRB_ERROR:       5.73 [deg radius, statistical plus systematic]
GRB_INTEN:       794 [cnts/sec]
DATA_SIGNIF:     17.70 [sigma]
INTEG_TIME:      0.256 [sec]
GRB_DATE:        15529 TJD;   333 DOY;   10/11/29
GRB_TIME:        56371.66 SOD {15:39:31.66} UT
GRB_PHI:         120.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 0.2560 [sec]
HARD_RATIO:      0.21
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 1,0,1, 1,0,0, 0,0,
SUN_POSTN:       245.50d {+16h 22m 00s}  -21.53d {-21d 31' 39"}
SUN_DIST:         84.82 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:      166.79d {+11h 07m 10s}   +0.15d {+00d 08' 47"}
MOON_DIST:        23.12 [deg]
MOON_ILLUM:      41 [%]
GAL_COORDS:      258.97, 30.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.01,-27.78 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 244.38,0.85 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 29 Nov 10 15:39:52 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     312737973
GRB_RA:          153.560d {+10h 14m 14s} (J2000),
                 153.689d {+10h 14m 45s} (current),
                 152.967d {+10h 11m 52s} (1950)
GRB_DEC:         -20.990d {-20d 59' 23"} (J2000),
                 -21.044d {-21d 02' 39"} (current),
                 -20.741d {-20d 44' 28"} (1950)
GRB_ERROR:       3.48 [deg radius, statistical only]
DATA_SIGNIF:     19.90 [sigma]
DATA_INTERVAL:   0.256 [sec]
GRB_DATE:        15529 TJD;   333 DOY;   10/11/29
GRB_TIME:        56371.66 SOD {15:39:31.66} UT
GRB_PHI:         121.00 [deg]
GRB_THETA:        23.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:       245.50d {+16h 22m 00s}  -21.53d {-21d 31' 40"}
SUN_DIST:         84.01 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:      166.80d {+11h 07m 11s}   +0.15d {+00d 08' 43"}
MOON_DIST:        24.76 [deg]
MOON_ILLUM:      41 [%]
GAL_COORDS:      260.56, 28.66 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      164.05,-29.60 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN Notice

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 29 Nov 10 15:40:13 UT 
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    6095,   Sub_Num: 0
GRB_INTEN:      9.07 [sigma]
GRB_TIME:       56370.23 SOD {15:39:30.23} UT
GRB_DATE:       15529 TJD;   333 DOY;   10/11/29
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=312737973).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:
+ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2010-11/2010-11-29T15-39-30.0653-03212-00007-0.lc

GCN Circular #11436
J. R. Cummings (GSFC/UMBC/CRESST), D. M. Palmer (LANL), S. D. Barthelmy (GSFC), and T. Sakamoto (GSFC/UMBC/CRESST) on behalf of the BAT team,
Valentin Pal'shin (Ioffe Inst) and K. Hurley (UCB) on behalf of the IPN,
V. Connaughton, M.S. Briggs, and C.A. Meegan on behalf of the Fermi GBM team,
A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team,
A. P. Beardmore (U Leicester) and J. A. Kennea (PSU) on behalf of the Swift-XRT team,
K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima, on behalf of the Suzaku WAM team,
J. Goldsten, on behalf of the MESSENGER NS GRB team:
At 15:39:31 UTC, Swift-BAT detected a rate increase due to GRB 101129A (BAT trigger #439471. Only a sub-threshold image source was found onboard. This event corresponds to Fermi GBM trigger #312737973. The IPN was alerted. In ground analysis, the source was detected with slightly greater confidence at RA, Dec 155.921, -17.645 which is:
```
RA (J2000)       10h 23m 41s
Dec (J2000)    -17d 38m 42s
```
with an estimated uncertainty radius of 3 arcmin (90% containment). Correlation of Swift-BAT counting rates and SPI-ACS counting rates, and SPI-ACS with Messenger yielded intersecting annuli consistent with this position. The burst was also detected by Suzaku-WAM.
As seen in BAT, the burst consisted of a single pulse with a T90 of about 0.35 +- 0.05 sec.
The burst was faint and short. The low-number statistics in BAT make a fit to the spectrum very uncertain. The photon index was approximately 0.8 +- 0.5. The fluence was approximately (9 +- 5) x 10^-08 ergs/cm^2.
A Swift TOO observation was executed at 11 hours after the burst. The location of the burst was observed by the Swift-XRT and Swift-UVOT for a total of about 1400 seconds. No afterglow was detected. No further observations are planned.
GCN Circular #11438
S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report:
The short hard GRB 101129A (localized by BAT and IPN: Cummings et al. GCN 11436) triggered Konus-Wind at T0=56370.759s UT (15:39:30.759)
The burst light curve consists of a single pulse with a total duration of ~0.4 s. The emission is seen up to 5 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB101129_T56370/
As observed by Konus-Wind the burst had a fluence of 3.5(+1.4/-1.1)x10-6 erg/cm2, and a 16-ms peak flux measured from T0-0.096s of 1.7(+0.7/-0.5)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+0.128 s) is best fit in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -0.4 (-0.4, +0.5), and Ep = 1210(-400, +680) keV (chi2 = 8.1/12 dof).
All the quoted results are preliminary. All the quoted errors are at the 90% confidence level
GCN Circular #11439
The short hard GRB 101129A (localized by BAT and IPN: Cummings et al. GCN 11436) triggered Konus-Wind at T0=56370.759s UT (15:39:30.759)
The burst light curve consists of a single pulse with a total duration of ~0.4 s. The emission is seen up to 5 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB101129_T56370/
As observed by Konus-Wind the burst had a fluence of 3.5(+1.4/-1.1)x10-6 erg/cm2, and a 16-ms peak flux measured from T0-0.096s of 1.7(+0.7/-0.5)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+0.128 s) is best fit in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -0.4 (-0.4, +0.5), and Ep = 1210(-400, +680) keV (chi2 = 8.1/12 dof).
All the quoted results are preliminary. All the quoted errors are at the 90% confidence level
GCN Circular #11443
N. Ohmori, A. Daikyuji, Y. Nishioka, M. Yamauchi (Univ. of Miyazaki), M. Ohno, M. Kokubun, T. Takahashi (ISAS/JAXA), K. Yamaoka (Aoyama Gakuin U.), S. Sugita (Nagoya U.), Y. Terada, M. Tashiro, W. Iwakiri, K. Takahara, T. Yasuda (Saitama U.),P. Tsai, Y. Urata, H.M. Lin (NCU), T. Uehara, Y. Hanabata, T. Takahashi, Y. Fukazawa (Hiroshima U.), N. Vasquez (Tokyo Tech.), Y. E. Nakagawa, M. Serino, T. Tamagawa (RIKEN), K. Nakazawa, K. Makishima (Univ. of Tokyo), S. Hong (Nihon U.), on behalf of the Suzaku WAM team, report:
The short GRB 101129A (localized by Swift/BAT and IPN; Cummings et al., GCN11436) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2010-11-29 15:39:31.92 UT (=T0).
The observed light curve shows a multi-peaked structure starting at T0+0.2s, ending at T0+0.6s, with a duration (T90) of about 0.31 seconds. The fluence in 100 - 1000 keV was 1.54 (-0.47, +0.12) x 10^-6 erg/cm^2. The 1-s peak flux measured from T0s was 2.50 (-0.89, +0.30) photons/cm^2/s in the same energy range.
Preliminary result shows that the time-averaged spectrum from T0 to T0+1s is well fitted by a power-law with exponential cutoff model: dN/dE = E^{-alpha} * exp(-(2-alpha)*E/Epeak) with alpha 0.43 (-0.62, +0.46), and Epeak 1027 (-215, +292) keV (chi^2/d.o.f. = 40.2/54).
All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included.
The light curves for this burst will be available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html

Back to JG's homepage

Jochen Greiner, last update: 03-Dec-2010 [Disclaimer]