batgrbproduct Analysis for Trigger=378559
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 v2.45
Process Start Time (local time): Tue Dec 8 16:01:14 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger378559/GCN5_download_cron
======================================================================
Trigger: 00378559 Segment: 000
BAT Trigger Time: 281958603.328 [s; MET]
Trigger Stop: 281958604.352 [s; MET]
UTC: 2009-12-08T09:49:57.998900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 29.4105366032275 Dec: 16.8826915846662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.31
Image Trigger?: NO
Rate S/N Ratio: 24.576411454889 [ if not an image trigger ]
Image S/N Ratio: 9.31
Flight Position: [ source = BAT ]
RA: 29.4105366032275 Dec: 16.8826915846662 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 29.4092899496577 Dec: 16.8792896796881 [deg; J2000]
{ 01h 57m 38.2s , +16d 52' 45.4" }
+/- 1.20808896813934 [arcmin] (estimated 90% radius based on SNR)
+/- 0.632489914362435 [arcmin] (formal 1-sigma fit error)
SNR: 23.2185027470593
Angular difference between Flight and Ground position is 0.216300 arcmin
Partial Coding Fraction: 0.1054688 [ including projection effects ]
Duration
T90: 14.0160000324249 +/- 2.89772326829494
Measured from: 0.288000106811523
to: 14.3040001392365 [s; relative to TRIGTIME]
T50: 5.69599997997284 +/- 3.08264818286744
Measured from: 3.68000012636185
to: 9.37600010633469 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.07599997520447
to: 9.07599997520447 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.160000026226044
to: 17.9519999623299 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.424726 1.949797 1.283268 0.296116
0.088539 0.094984 0.085930 0.068536 [error]
Peak 0.389382 0.580567 0.502280 0.171379
0.030061 0.036802 0.033071 0.025683 [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 5.80e-07 9.05e-07 1.06e-06 2.41e-06 3.25e-06 4.96e-06 erg/cm2
Error 5.62e-08 5.35e-08 8.58e-08 4.12e-07 2.03e-07 4.81e-07 erg/cm2
Peak flux Power-law 4.86e+00 5.01e+00 3.64e+00 4.25e+00 1.52e+01 1.78e+01 ph/cm2/s
Error 5.81e-01 3.69e-01 2.87e-01 6.89e-01 1.04e+00 1.17e+00 ph/cm2/s
Fluence Cutoff-PL 5.63e-07 9.21e-07 1.08e-06 1.86e-06 3.22e-06 4.42e-06 erg/cm2
Error 5.01e-08 6.37e-08 9.14e-08 8.51e-07 2.11e-07 6.69e-07 erg/cm2
Peak flux Cutoff-PL 4.71e+00 5.07e+00 3.71e+00 3.65e+00 1.51e+01 1.71e+01 ph/cm2/s
Error 7.00e-01 4.08e-01 3.34e-01 1.29e+00 1.06e+00 1.32e+00 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.768 0.104 - - 1.95e-02 1.18e-03 45.770 57
CPL 1.595 0.338 116.9 0.0 2.38e-02 0.00e+00 45.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.459 0.112 - - 1.23e-01 8.08e-03 49.960 57
CPL 1.315 0.351 255.5 0.0 1.44e-01 6.04e-02 49.630 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: 11.072000 sec.
T50 in the 50-300 keV band: 3.712000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.112 -0.160 17.952
T90 14.016 0.288 14.304
T50 5.696 3.680 9.376
Peak 1.000 8.076 9.076
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
29.4093 +16.8793 0.0083 47.3 146.7 4.9799 23.2 TRIG_00378559
------------------------------------------
Foreground time interval of the image:
-0.160 13.973 (delta_t = 14.133 [sec])
Background time interval of the image:
-239.328 -0.160 (delta_t = 239.168 [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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.160 sec. to 17.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76843 ( -0.103532 0.105318 )
Norm@50keV : 1.94783E-02 ( -0.00118301 0.00117582 )
------------------------------------------------------------
# Chi-Squared = 45.77 using 59 PHA bins.
# Reduced chi-squared = 0.8030 for 57 degrees of freedom
# Null hypothesis probability = 8.568209e-01
Photon flux (15-150 keV) in 18.11 sec: 2.65192 ( -0.159571 0.159951 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2518e-06 ( -2.02535e-07 2.03343e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.160 sec. to 17.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59454 ( -0.412736 0.262306 )
Epeak [keV] : 116.884 ( )
Norm@50keV : 2.38455E-02 ( )
------------------------------------------------------------
# Chi-Squared = 45.18 using 59 PHA bins.
# Reduced chi-squared = 0.8067 for 56 degrees of freedom
# Null hypothesis probability = 8.492354e-01
Photon flux (15-150 keV) in 18.11 sec: 2.62722 ( -0.24151 0.08386 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21672e-06 ( -2.19403e-07 2.0247e-07 ) ergs/cm2
Band function
Time interval is from -0.160 sec. to 17.952 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32018 ( 1.31737 5.74104 )
beta : -1.85998 ( 1.86035 0.17566 )
Epeak [keV] : 59.2100 ( -58.8709 557.682 )
Norm@50keV : 3.55052E-02 ( -0.017273 91.8684 )
------------------------------------------------------------
# Chi-Squared = 44.84 using 59 PHA bins.
# Reduced chi-squared = 0.8152 for 55 degrees of freedom
# Null hypothesis probability = 8.343862e-01
Photon flux (15-150 keV) in 18.11 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 8.096 sec. to 9.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45921 ( -0.111991 0.112354 )
Norm@50keV : 0.122773 ( -0.00808289 0.00807173 )
------------------------------------------------------------
# Chi-Squared = 49.96 using 59 PHA bins.
# Reduced chi-squared = 0.8765 for 57 degrees of freedom
# Null hypothesis probability = 7.340951e-01
Photon flux (15-150 keV) in 0.96 sec: 15.1650 ( -1.04197 1.04363 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12596e-06 ( -7.9611e-08 7.98067e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.096 sec. to 9.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31480 ( -0.459555 0.242722 )
Epeak [keV] : 255.546 ( -255.546 -255.546 )
Norm@50keV : 0.144079 ( -0.0284179 0.0923156 )
------------------------------------------------------------
# Chi-Squared = 49.63 using 59 PHA bins.
# Reduced chi-squared = 0.8863 for 56 degrees of freedom
# Null hypothesis probability = 7.131394e-01
Photon flux (15-150 keV) in 0.96 sec: 15.0802 ( -1.067 1.0583 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11972e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 8.096 sec. to 9.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17074 ( 1.18022 2.83949 )
beta : -1.55314 ( 1.55165 0.196391 )
Epeak [keV] : 131.048 ( -139.922 -139.922 )
Norm@50keV : 0.174610 ( -0.0524685 69664.3 )
------------------------------------------------------------
# Chi-Squared = 49.59 using 59 PHA bins.
# Reduced chi-squared = 0.9017 for 55 degrees of freedom
# Null hypothesis probability = 6.806029e-01
Photon flux (15-150 keV) in 0.96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Dec 8 16:29:23 EST 2009