batgrbproduct Analysis for Trigger=100116
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.41
Process Start Time (local time): Fri Jan 4 18:23:59 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger100116/SDC2
======================================================================
Trigger: 00100116 Segment: 000
BAT Trigger Time: 124961305.236 [s; MET]
Trigger Stop: 124961315.236 [s; MET]
UTC: 2004-12-17T07:28:25.236000 [includes UTCF correction]
WARNING: UTCFINIT is zero. This is suspicious.
Where From?: TDRSS position message
BAT
RA: 164.79 Dec: -17.95 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 0
Image Trigger?: NO
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 0
Flight Position: [ source = BAT ]
RA: 164.79 Dec: -17.95 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 164.788380701519 Dec: -17.9438676755655 [deg; J2000]
{ 10h 59m 09.2s , -17d 56' 37.9" }
+/- 1.39708086094039 [arcmin] (estimated 90% radius based on SNR)
+/- 0.61245417923867 [arcmin] (formal 1-sigma fit error)
SNR: 18.8650965673175
RA = 10h 59m 9.2s (164.788381 deg.)
Dec = -17d 56' 38" (-17.943868 deg.)
Angular difference between Flight and Ground position is 0.379372 arcmin
Partial Coding Fraction: 0.296875 [ including projection effects ]
Duration
T90: 5.88400000333786 +/- 0.708511104667832
Measured from: 1.18400000035763
to: 7.06800000369549 [s; relative to TRIGTIME]
T50: 2.72000001370907 +/- 0.265601200663987
Measured from: 2.31999999284744
to: 5.04000000655651 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.26000000536442
to: 4.26000000536442 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.824000000953674
to: 8.2039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.895757 1.570761 1.322723 0.287802
0.044828 0.048388 0.046525 0.038466 [error]
Peak 0.178898 0.280110 0.260089 0.065891
0.017039 0.018628 0.018353 0.014315 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 3.68e-07 6.95e-07 1.01e-06 3.15e-06 2.87e-06 5.17e-06 erg/cm2
Error 2.67e-08 2.98e-08 4.56e-08 3.16e-07 1.13e-07 0.00e+00 erg/cm2
Peak flux Power-law 2.11e+00 2.25e+00 1.71e+00 2.10e+00 6.86e+00 8.17e+00 ph/cm2/s
Error 2.78e-01 1.83e-01 1.45e-01 3.69e-01 5.15e-01 5.93e-01 ph/cm2/s
Fluence Cutoff-PL 3.09e-07 7.32e-07 1.09e-06 1.36e-06 2.77e-06 3.43e-06 erg/cm2
Error 3.37e-08 3.44e-08 5.56e-08 4.18e-07 1.23e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.89e+00 2.35e+00 1.81e+00 1.30e+00 6.75e+00 7.35e+00 ph/cm2/s
Error 3.38e-01 2.10e-01 1.78e-01 6.14e-01 5.26e-01 8.04e-01 ph/cm2/s
Fluence Band 3.05e-07 7.29e-07 1.09e-06 1.36e-06 2.77e-06 3.32e-06 erg/cm2
Error 3.33e-08 3.43e-08 5.55e-08 4.18e-07 1.23e-07 0.00e+00 erg/cm2
Peak flux Band 1.89e+00 2.35e+00 1.81e+00 1.30e+00 6.75e+00 7.35e+00 ph/cm2/s
Error 3.38e-01 2.10e-01 1.79e-01 6.14e-01 5.27e-01 8.05e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.455 0.066 - - 4.07e-02 1.52e-03 74.910 57
CPL 0.699 0.314 94.8 20.4 9.07e-02 3.03e-02 54.801 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.401 0.122 - - 5.64e-02 4.05e-03 52.359 57
CPL 0.897 0.503 118.0 332.9 9.82e-02 5.70e-02 49.024 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 1.728000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 7.380 0.824 8.204
T90 5.884 1.184 7.068
T50 2.720 2.320 5.040
Peak 1.000 3.260 4.260
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
164.7884 -17.9439 0.0102 42.2 155.6 2.9681 18.9 TRIG_00100116
------------------------------------------
Foreground time interval of the image:
0.824 8.204 (delta_t = 7.380 [sec])
Background time interval of the image:
-2.236 0.824 (delta_t = 3.060 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 5) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.824 sec. to 8.204 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45535 ( -6.637096E-02 6.640482E-02) )
Norm@50keV : 4.073168E-02 ( -1.522142E-03 1.522150E-03) )
------------------------------------------------------------
Chi-Squared = 74.91014 using 59 PHA bins.
Reduced chi-squared = 1.314213 for 57 degrees of freedom
Null hypothesis probability = 5.600E-02
Photon flux (15-150 keV) in 7.380 sec: 5.02635 ( -0.20402 0.20456 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.87364e-06 ( -1.13224e-07 1.13534e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.824 sec. to 8.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.699137 ( -0.325542 0.302355 )
Epeak [keV] : 94.8476 ( -13.5112 27.3063 )
Norm@50keV : 9.072696E-02 ( -2.436211E-02 3.619529E-02) )
------------------------------------------------------------
Chi-Squared = 54.80144 using 59 PHA bins.
Reduced chi-squared = 0.9785971 for 56 degrees of freedom
Null hypothesis probability = 0.520
Photon flux (15-150 keV) in 7.380 sec: 4.81925 ( -0.21702 0.21822 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77194e-06 ( -1.23799e-07 1.22707e-07 ) ergs/cm2
Band function
Time interval is from 0.824 sec. to 8.204 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.699172 ( -0.302175 0.326044 )
beta : -9.24244 ( -0.757555 7.50824 )
Epeak [keV] : 94.8363 ( -13.4935 27.2706 )
Norm@50keV : 9.072014E-02 ( -2.435904E-02 3.622278E-02) )
------------------------------------------------------------
Chi-Squared = 54.80147 using 59 PHA bins.
Reduced chi-squared = 0.9963904 for 55 degrees of freedom
Null hypothesis probability = 0.482
Photon flux (15-150 keV) in 7.380 sec: 4.81935 ( -0.21719 0.2182 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76987e-06 ( -1.23482e-07 1.22737e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 3.260 sec. to 4.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40083 ( -0.121888 0.121915 )
Norm@50keV : 5.635518E-02 ( -4.056081E-03 4.052810E-03) )
------------------------------------------------------------
Chi-Squared = 52.35944 using 59 PHA bins.
Reduced chi-squared = 0.9185867 for 57 degrees of freedom
Null hypothesis probability = 0.650
Photon flux (15-150 keV) in 1.000 sec: 6.86429 ( -0.51424 0.5152 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.44449e-07 ( -4.2336e-08 4.2494e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.260 sec. to 4.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.897178 ( -0.533592 0.472529 )
Epeak [keV] : 118.026 ( -35.8137 629.981 )
Norm@50keV : 9.820595E-02 ( -3.912016E-02 7.483838E-02) )
------------------------------------------------------------
Chi-Squared = 49.02384 using 59 PHA bins.
Reduced chi-squared = 0.8754257 for 56 degrees of freedom
Null hypothesis probability = 0.734
Photon flux (15-150 keV) in 1.000 sec: 6.74562 ( -0.52706 0.52517 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.33681e-07 ( -4.4738e-08 4.4374e-08 ) ergs/cm2
Band function
Time interval is from 3.260 sec. to 4.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.897161 ( -0.472937 0.533661 )
beta : -8.73571 ( -1.26429 7.37713 )
Epeak [keV] : 118.078 ( -35.8538 632.056 )
Norm@50keV : 9.817588E-02 ( -3.908235E-02 7.489092E-02) )
------------------------------------------------------------
Chi-Squared = 49.02382 using 59 PHA bins.
Reduced chi-squared = 0.8913422 for 55 degrees of freedom
Null hypothesis probability = 0.701
Photon flux (15-150 keV) in 1.000 sec: 6.74558 ( -0.52706 0.5272 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.33384e-07 ( -4.4756e-08 4.4278e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 18:29:10 EST 2008