batgrbproduct Analysis for Trigger=354299
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 v2.44
Process Start Time (local time): Sun Jun 7 18:28:27 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354299/GCN5_download_cron
======================================================================
Trigger: 00354299 Segment: 000
BAT Trigger Time: 266045422.208 [s; MET]
Trigger Stop: 266045422.72 [s; MET]
UTC: 2009-06-07T05:30:17.401940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 191.208949448038 Dec: 44.1296441879312 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.44
Image Trigger?: NO
Rate S/N Ratio: 18.8679622641132 [ if not an image trigger ]
Image S/N Ratio: 6.44
Flight Position: [ source = BAT ]
RA: 191.208949448038 Dec: 44.1296441879312 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 191.194209179039 Dec: 44.1076890590433 [deg; J2000]
{ 12h 44m 46.6s , +44d 06' 27.7" }
+/- 1.89941838122806 [arcmin] (estimated 90% radius based on SNR)
+/- 1.03266898455223 [arcmin] (formal 1-sigma fit error)
SNR: 12.1643497720712
Angular difference between Flight and Ground position is 1.462336 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 2.28800001740456 +/- 0.13078227252082
Measured from: 0.0840000808238983
to: 2.37200009822845 [s; relative to TRIGTIME]
T50: 1.86399999260902 +/- 0.282899258735255
Measured from: 0.264000087976456
to: 2.12800008058548 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.00800001621246338
to: 0.991999983787537 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0600000023841858
to: 2.48800000548363 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.046180 0.054707 0.052070 0.014115
0.007932 0.008036 0.007443 0.006572 [error]
Peak 0.027888 0.017706 0.032851 0.008026
0.004867 0.004901 0.004695 0.004149 [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 1.09e-08 2.35e-08 3.99e-08 1.55e-07 1.10e-07 2.30e-07 erg/cm2
Error 3.28e-09 3.94e-09 7.54e-09 7.17e-08 1.86e-08 7.57e-08 erg/cm2
Peak flux Power-law 1.54e-01 2.17e-01 2.26e-01 4.34e-01 7.33e-01 1.03e+00 ph/cm2/s
Error 7.01e-02 5.53e-02 4.40e-02 2.22e-01 1.36e-01 2.17e-01 ph/cm2/s
Fluence Cutoff-PL 1.09e-08 2.35e-08 4.00e-08 1.54e-07 1.10e-07 2.29e-07 erg/cm2
Error 3.28e-09 3.94e-09 7.55e-09 7.12e-08 1.86e-08 7.52e-08 erg/cm2
Peak flux Cutoff-PL 1.53e-01 2.17e-01 2.26e-01 4.32e-01 7.33e-01 1.03e+00 ph/cm2/s
Error 7.00e-02 5.54e-02 4.40e-02 2.21e-01 1.35e-01 2.16e-01 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 1.238 0.300 - - 4.49e-03 6.51e-04 71.490 57
CPL 1.234 0.303 10000.0 0.0 4.51e-03 6.55e-04 71.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.938 0.400 - - 6.38e-03 1.17e-03 61.870 57
CPL 2.160 0.000 55.9 0.0 1.36e-03 0.00e+00 60.370 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: 0.576000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 2.428 0.060 2.488
T90 2.288 0.084 2.372
T50 1.864 0.264 2.128
Peak 1.000 -0.008 0.992
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
191.1942 +44.1077 0.0158 19.9 -6.8 0.1783 12.2 TRIG_00354299
------------------------------------------
Foreground time interval of the image:
0.060 2.488 (delta_t = 2.428 [sec])
Background time interval of the image:
-60.208 0.060 (delta_t = 60.268 [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 0.060 sec. to 2.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23751 ( -0.300595 0.298541 )
Norm@50keV : 4.49375E-03 ( -0.000651874 0.000650617 )
------------------------------------------------------------
# Chi-Squared = 71.49 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 57 degrees of freedom
# Null hypothesis probability = 9.373449e-02
Photon flux (15-150 keV) in 2.428 sec: 0.530416 ( -0.0788808 0.0791142 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0956e-07 ( -1.85004e-08 1.87016e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.060 sec. to 2.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23384 ( -0.334596 0.272294 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 4.51368E-03 ( -0.000656123 0.00065408 )
------------------------------------------------------------
# Chi-Squared = 71.52 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 56 degrees of freedom
# Null hypothesis probability = 7.908434e-02
Photon flux (15-150 keV) in 2.428 sec: 0.530148 ( -0.078853 0.079089 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09568e-07 ( -1.85096e-08 1.87131e-08 ) ergs/cm2
Band function
Time interval is from 0.060 sec. to 2.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00502 ( 1.00503 1.00503 )
beta : -1.23734 ( 1.23735 0.300317 )
Epeak [keV] : 46.8911 ( -46.8852 -46.8852 )
Norm@50keV : 8.06782E-03 ( -0.00806782 2480.44 )
------------------------------------------------------------
# Chi-Squared = 71.49 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 55 degrees of freedom
# Null hypothesis probability = 6.676841e-02
Photon flux (15-150 keV) in 2.428 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 0.060 sec. to 0.924 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.938465 ( -0.408979 0.390922 )
Norm@50keV : 6.38496E-03 ( -0.00118995 0.00114909 )
------------------------------------------------------------
# Chi-Squared = 61.87 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.064097e-01
Photon flux (15-150 keV) in 0.864 sec: 0.733320 ( -0.135248 0.135752 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10169e-08 ( -1.20638e-08 1.21001e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.060 sec. to 0.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15953 ( )
Epeak [keV] : 55.9011 ( )
Norm@50keV : 1.36218E-03 ( )
------------------------------------------------------------
# Chi-Squared = 60.37 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 56 degrees of freedom
# Null hypothesis probability = 3.208245e-01
Photon flux (15-150 keV) in 0.864 sec: 0.732815 ( -0.135196 0.135717 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10353e-08 ( -1.20758e-08 1.21074e-08 ) ergs/cm2
Band function
Time interval is from 0.060 sec. to 0.924 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.880208 ( 0.879864 0.879864 )
beta : -0.939565 ( -0.390527 0.410194 )
Epeak [keV] : 13.8683 ( -13.8647 -13.8647 )
Norm@50keV : 9.49494E-03 ( -0.00426362 458425 )
------------------------------------------------------------
# Chi-Squared = 61.87 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.442092e-01
Photon flux (15-150 keV) in 0.864 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jun 7 18:47:48 EDT 2009