batgrbproduct Analysis for Trigger=528432
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jul 24 17:44:00 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528432/batgroup_hand_proc
======================================================================
Trigger: 00528432 Segment: 000
BAT Trigger Time: 364798376 [s; MET]
Trigger Stop: 364798696 [s; MET]
UTC: 2012-07-24T04:52:46.540400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.607513837354 Dec: -26.3238447152092 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.14
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.14
Flight Position: [ source = BAT ]
RA: 268.607513837354 Dec: -26.3238447152092 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.606570916971 Dec: -26.3127561051105 [deg; J2000]
{ 17h 54m 25.6s , -26d 18' 45.9" }
+/- 3.69465131611948 [arcmin] (estimated 90% radius based on SNR)
+/- 2.40499155712923 [arcmin] (formal 1-sigma fit error)
SNR: 4.70217896428539
Angular difference between Flight and Ground position is 0.667246 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.344313 0.327774 0.078809 0.019144
0.101795 0.087570 0.075662 0.067424 [error]
Peak 0.344313 0.327774 0.078809 0.019144
0.101795 0.087570 0.075662 0.067424 [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-07 9.75e-08 5.98e-08 5.56e-08 2.90e-07 3.22e-07 erg/cm2
Error 4.20e-08 4.26e-08 5.15e-08 1.04e-07 1.29e-07 1.86e-07 erg/cm2
Peak flux Power-law 1.13e-02 5.64e-03 1.73e-03 6.74e-04 1.91e-02 1.94e-02 ph/cm2/s
Error 4.43e-03 2.37e-03 1.44e-03 1.16e-03 6.46e-03 6.65e-03 ph/cm2/s
Fluence Cutoff-PL 1.09e-07 1.11e-07 2.20e-08 4.04e-10 2.42e-07 0.00e+00 erg/cm2
Error 4.78e-08 5.69e-08 5.63e-08 8.96e-08 1.83e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.10e-02 6.52e-03 7.04e-04 6.78e-06 1.82e-02 1.83e-02 ph/cm2/s
Error 5.10e-03 3.21e-03 1.60e-03 1.00e-03 6.05e-03 6.71e-03 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 1.11e-02 1.88e-02 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 6.53e-03 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 2.706 0.846 - - 8.51e-05 5.46e-05 52.760 57
CPL 0.841 0.000 18.8 0.0 1.65e-03 0.00e+00 52.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.706 0.846 - - 8.51e-05 5.46e-05 52.760 57
CPL 0.841 0.000 18.8 0.0 1.65e-03 0.00e+00 52.190 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.6066 -26.3128 0.0409 7.8 56.7 1.0560 4.7 TRIG_00528432
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70647 ( -0.710716 0.981261 )
Norm@50keV : 8.50965E-05 ( -5.20368e-05 5.7085e-05 )
------------------------------------------------------------
# Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.345950e-01
Photon flux (15-150 keV) in 320 sec: 1.90740E-02 ( -0.0064527 0.00647292 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90343e-07 ( -1.19624e-07 1.38603e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.840555 ( )
Epeak [keV] : 18.7821 ( )
Norm@50keV : 1.64850E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196800e-01
Photon flux (15-150 keV) in 320 sec: 1.82406E-02 ( -0.0060461 0.0060461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41601e-07 ( -9.2473e-08 2.72572e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620803 ( 1.78984 1.78984 )
beta : -10.00000 ( 4.34018e+08 4.34018e+08 )
Epeak [keV] : 19.7731 ( -18.3212 16.9269 )
Norm@50keV : 2.38457E-03 ( -0.00422722 12.4864 )
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 55 degrees of freedom
# Null hypothesis probability = 5.829959e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.14522 (-1.77425 2.46172)
R^2/D10^2 : 6.40901E-02 (-0.06409 0.22877)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9163 for 57 degrees of freedom
# Null hypothesis probability = 6.542503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-07 6.422e-08
25- 50 1.117e-07 7.314e-08
50-150 1.128e-08 9.974e-09
15-150 2.294e-07 1.435e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4619 (-12.3408 36.4759)
Norm : 0.194586 (-0.10815 0.304539)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9164 for 57 degrees of freedom
# Null hypothesis probability = 6.541498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.093e-07 6.637e-08
25- 50 1.074e-07 6.834e-08
50-150 4.153e-08 3.672e-08
15-150 2.582e-07 1.710e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 22.7204 ( )
R1^2/D10^2 : 8.36464E-05 (-0.000101915 -0.000101915)
kT2 [keV] : 5.72498 (-5.70923 2.70413)
R2^2/D10^2 : 8.25134E-02 (-0.0820042 -0.0820042)
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Chi-Squared = 51.93 using 59 PHA bins.
# Reduced chi-squared = 0.9486 for 55 degrees of freedom
# Reduced chi-squared = 0.9442 for 55 degrees of freedom
# Null hypothesis probability = 5.832311e-01
# Null hypothesis probability = 5.927012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 1.699e-07
25- 50 1.100e-07 2.037e-07
50-150 2.434e-08 8.210e-08
15-150 2.426e-07 4.237e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70647 ( -0.710716 0.981261 )
Norm@50keV : 8.50965E-05 ( -5.20368e-05 5.7085e-05 )
------------------------------------------------------------
# Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.345950e-01
Photon flux (15-150 keV) in 320 sec: 1.90740E-02 ( -0.0064527 0.00647292 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90343e-07 ( -1.19624e-07 1.38603e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.840555 ( )
Epeak [keV] : 18.7821 ( )
Norm@50keV : 1.64850E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196800e-01
Photon flux (15-150 keV) in 320 sec: 1.82406E-02 ( -0.0060461 0.0060461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41601e-07 ( -9.2473e-08 2.72572e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620803 ( 1.78984 1.78984 )
beta : -10.00000 ( 4.34018e+08 4.34018e+08 )
Epeak [keV] : 19.7731 ( -18.3297 16.927 )
Norm@50keV : 2.38457E-03 ( -0.00422722 12.4844 )
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 55 degrees of freedom
# Null hypothesis probability = 5.829959e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.14522 (-1.77425 2.46172)
R^2/D10^2 : 6.40901E-02 (-0.06409 0.22877)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9163 for 57 degrees of freedom
# Null hypothesis probability = 6.542503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-07 6.370e-08
25- 50 1.117e-07 7.072e-08
50-150 1.128e-08 9.947e-09
15-150 2.294e-07 1.403e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4619 (-12.3408 36.4759)
Norm : 0.194586 (-0.10815 0.304539)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9164 for 57 degrees of freedom
# Null hypothesis probability = 6.541498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.093e-07 6.594e-08
25- 50 1.074e-07 6.779e-08
50-150 4.153e-08 3.867e-08
15-150 2.582e-07 1.611e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 22.7204 ( )
R1^2/D10^2 : 8.36464E-05 (-0.000101915 -0.000101915)
kT2 [keV] : 5.72498 (-5.70923 2.70413)
R2^2/D10^2 : 8.25134E-02 (-0.0820042 -0.0820042)
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Chi-Squared = 51.93 using 59 PHA bins.
# Reduced chi-squared = 0.9486 for 55 degrees of freedom
# Reduced chi-squared = 0.9442 for 55 degrees of freedom
# Null hypothesis probability = 5.832311e-01
# Null hypothesis probability = 5.927012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 1.458e-07
25- 50 1.100e-07 2.672e-07
50-150 2.434e-08 8.224e-08
15-150 2.426e-07 4.946e-07
Plot creation:
Tue Jul 24 21:47:56 EDT 2012