batgrbproduct Analysis for Trigger=359938
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): Fri Aug 14 07:19:10 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger359938/GCN5_download_cron
======================================================================
Trigger: 00359938 Segment: 000
BAT Trigger Time: 271890609.088 [s; MET]
Trigger Stop: 271890609.152 [s; MET]
UTC: 2009-08-13T21:10:04.092900 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 5.55814452210364 Dec: -2.73388198175141 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.69
Image Trigger?: NO
Rate S/N Ratio: 6.6332495807108 [ if not an image trigger ]
Image S/N Ratio: 5.69
Flight Position: [ source = BAT ]
RA: 5.55814452210364 Dec: -2.73388198175141 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 5.51026767889766 Dec: -2.7109691051047 [deg; J2000]
{ 00h 22m 02.5s , -02d 42' 39.5" }
+/- 3.35999969959202 [arcmin] (estimated 90% radius based on SNR)
+/- 2.01742478403736 [arcmin] (formal 1-sigma fit error)
SNR: 5.3852414768001
Angular difference between Flight and Ground position is 3.181709 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001092 0.003724 0.006996 0.002344
0.001340 0.001577 0.001498 0.001229 [error]
Peak 0.001092 0.003724 0.006996 0.002344
0.001340 0.001577 0.001498 0.001229 [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 5.08e-10 1.45e-09 3.34e-09 2.09e-08 9.02e-09 2.62e-08 erg/cm2
Error 3.55e-10 6.35e-10 1.12e-09 1.60e-08 3.05e-09 1.64e-08 erg/cm2
Peak flux Power-law 2.52e-01 3.88e-01 4.48e-01 9.94e-01 1.38e+00 2.08e+00 ph/cm2/s
Error 1.79e-01 1.75e-01 1.48e-01 6.88e-01 4.79e-01 7.61e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 8.27e-02 3.78e-01 5.99e-01 1.26e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 9.93e-02 1.90e-01 1.91e-01 5.60e-01 0.00e+00 0.00e+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 0.792 0.560 - - 1.20e-02 4.29e-03 40.880 57
CPL -4.420 0.000 76.8 18.3 1.15e+00 0.00e+00 37.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.792 0.560 - - 1.20e-02 4.29e-03 40.880 57
CPL -4.420 0.000 76.8 18.3 1.15e+00 0.00e+00 37.330 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.5103 -2.7110 0.0358 14.5 -95.3 0.0146 5.4 TRIG_00359938
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.088 -1.088 (delta_t = 59.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.791643 ( -0.596871 0.523071 )
Norm@50keV : 1.20124E-02 ( -0.00435597 0.0042241 )
------------------------------------------------------------
# Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7172 for 57 degrees of freedom
# Null hypothesis probability = 9.470642e-01
Photon flux (15-150 keV) in 0.064 sec: 1.38087 ( -0.473727 0.483886 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0167e-09 ( -3.03066e-09 3.06032e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.41953 ( )
Epeak [keV] : 76.8009 ( -14.4257 22.1394 )
Norm@50keV : 1.14995 ( )
------------------------------------------------------------
# Chi-Squared = 37.33 using 59 PHA bins.
# Reduced chi-squared = 0.6667 for 56 degrees of freedom
# Null hypothesis probability = 9.741074e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.75796 ( -3.63507 -3.43024 )
beta : -9.37167 ( 10 19.9999 )
Epeak [keV] : 79.0338 ( -16.0298 148.766 )
Norm@50keV : 0.657872 ( -0.29982 5.93959 )
------------------------------------------------------------
# Chi-Squared = 37.33 using 59 PHA bins.
# Reduced chi-squared = 0.6787 for 55 degrees of freedom
# Null hypothesis probability = 9.673981e-01
Photon flux (15-150 keV) in 0.064 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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.791643 ( -0.596871 0.523071 )
Norm@50keV : 1.20124E-02 ( -0.00435597 0.0042241 )
------------------------------------------------------------
# Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7172 for 57 degrees of freedom
# Null hypothesis probability = 9.470642e-01
Photon flux (15-150 keV) in 0.064 sec: 1.38087 ( -0.473727 0.483886 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0167e-09 ( -3.03066e-09 3.06032e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.41953 ( )
Epeak [keV] : 76.8009 ( -14.4257 22.1394 )
Norm@50keV : 1.14995 ( )
------------------------------------------------------------
# Chi-Squared = 37.33 using 59 PHA bins.
# Reduced chi-squared = 0.6667 for 56 degrees of freedom
# Null hypothesis probability = 9.741074e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.75796 ( -3.63507 -3.43024 )
beta : -9.37167 ( 10 19.9999 )
Epeak [keV] : 79.0338 ( -16.0298 148.766 )
Norm@50keV : 0.657872 ( -0.29982 5.93959 )
------------------------------------------------------------
# Chi-Squared = 37.33 using 59 PHA bins.
# Reduced chi-squared = 0.6787 for 55 degrees of freedom
# Null hypothesis probability = 9.673981e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Aug 14 07:26:25 EDT 2009