batgrbproduct Analysis for Trigger=572742
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): Wed Oct 2 23:47:45 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger572742/GCN5_download_cron
======================================================================
Trigger: 00572742 Segment: 000
BAT Trigger Time: 402404079.616 [s; MET]
Trigger Stop: 402404080.64 [s; MET]
UTC: 2013-10-02T10:54:28.514160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 75.0612139371135 Dec: -75.7266590313801 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.78
Image Trigger?: NO
Rate S/N Ratio: 12.6095202129185 [ if not an image trigger ]
Image S/N Ratio: 6.78
Flight Position: [ source = BAT ]
RA: 75.0612139371135 Dec: -75.7266590313801 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 75.1348406601413 Dec: -75.7014368911575 [deg; J2000]
{ 05h 00m 32.4s , -75d 42' 05.2" }
+/- 1.16858445919277 [arcmin] (estimated 90% radius based on SNR)
+/- 0.440627728005094 [arcmin] (formal 1-sigma fit error)
SNR: 24.3478762148783
Angular difference between Flight and Ground position is 1.865065 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 39.1040000319481 +/- 8.08327853500742
Measured from: -4.41599988937378
to: 34.6880001425743 [s; relative to TRIGTIME]
T50: 13.5040000081062 +/- 3.44650545487221
Measured from: 0.512000143527985
to: 14.0160001516342 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.48400002717972
to: 6.48400002717972 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.95200002193451
to: 41.6000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.617060 0.665774 0.192995 0.034659
0.036600 0.037306 0.031649 0.028766 [error]
Peak 0.038119 0.028999 0.007169 0.009358
0.005437 0.005598 0.004643 0.004159 [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 1.87e-07 2.31e-07 2.08e-07 3.24e-07 7.37e-07 9.50e-07 erg/cm2
Error 1.80e-08 1.70e-08 2.76e-08 8.23e-08 6.40e-08 1.16e-07 erg/cm2
Peak flux Power-law 3.17e-01 2.01e-01 8.25e-02 4.59e-02 6.24e-01 6.47e-01 ph/cm2/s
Error 7.36e-02 4.31e-02 3.30e-02 3.31e-02 1.22e-01 1.30e-01 ph/cm2/s
Fluence Cutoff-PL 1.68e-07 2.76e-07 1.61e-07 2.33e-08 6.25e-07 6.28e-07 erg/cm2
Error 2.05e-08 2.47e-08 3.82e-08 3.12e-08 6.36e-08 6.87e-08 erg/cm2
Peak flux Cutoff-PL 3.10e-01 2.60e-01 2.40e-02 6.46e-05 5.94e-01 5.94e-01 ph/cm2/s
Error 8.35e-02 6.53e-02 3.81e-02 4.86e-03 1.15e-01 1.15e-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 2.153 0.137 - - 1.66e-03 1.61e-04 81.270 57
CPL 0.357 0.840 34.0 4.3 2.10e-02 3.87e-02 62.160 56
The chi2 of BB fit is 73.17 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.287 0.388 - - 3.60e-03 1.11e-03 52.710 57
CPL -2.378 4.067 27.8 5.4 6.47e+00 0.00e+00 47.990 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: 121.024000 sec.
T50 in the 50-300 keV band: 71.040000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 47.552 -5.952 41.600
T90 39.104 -4.416 34.688
T50 13.504 0.512 14.016
Peak 1.000 5.484 6.484
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
75.1348 -75.7014 0.0079 7.3 -24.9 1.0665 24.3 TRIG_00572742
------------------------------------------
Foreground time interval of the image:
-5.952 12.285 (delta_t = 18.237 [sec])
Background time interval of the image:
-239.616 -34.436 (delta_t = 205.180 [sec])
-33.616 -5.952 (delta_t = 27.664 [sec])
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 -5.952 sec. to 41.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15263 ( -0.134046 0.139495 )
Norm@50keV : 1.65971E-03 ( -0.000161679 0.000160129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.27 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 57 degrees of freedom
# Null hypothesis probability = 1.909121e-02
Photon flux (15-150 keV) in 47.55 sec: 0.268108 ( -0.0192537 0.0192583 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.37429e-07 ( -6.33822e-08 6.45753e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.952 sec. to 41.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.356981 ( -0.907493 0.772992 )
Epeak [keV] : 34.0387 ( -4.49657 4.0994 )
Norm@50keV : 2.10126E-02 ( -0.0210289 0.0563105 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.16 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 56 degrees of freedom
# Null hypothesis probability = 2.661450e-01
Photon flux (15-150 keV) in 47.55 sec: 0.252793 ( -0.019657 0.019771 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24945e-07 ( -6.02791e-08 6.68268e-08 ) ergs/cm2
Band function
Time interval is from -5.952 sec. to 41.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.164316 ( -0.690142 3.62085 )
beta : -4.36898 ( 4.26443 1.70405 )
Epeak [keV] : 34.2228 ( -6.5743 3.99848 )
Norm@50keV : 2.75600E-02 ( -0.00832416 7.88715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.06 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 55 degrees of freedom
# Null hypothesis probability = 2.390381e-01
Photon flux (15-150 keV) in 47.55 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] : 8.87256 (-0.645104 0.697776)
R^2/D10^2 : 0.200043 (-0.0522513 0.0705961)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.17 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 57 degrees of freedom
# Null hypothesis probability = 7.321405e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.447e-07 1.574e-08
25- 50 3.007e-07 2.423e-08
50-150 1.098e-07 2.427e-08
15-150 5.552e-07 4.636e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.2974 (-8.03797 10.8653)
Norm : 1.57884 (-0.184092 0.226124)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.823104e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.811e-07 1.700e-08
25- 50 2.549e-07 2.083e-08
50-150 2.346e-07 5.059e-08
15-150 6.706e-07 6.300e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.50367 (-1.85417 1.95779)
R1^2/D10^2 : 0.700974 (-0.393703 2.04674)
kT2 [keV] : 12.6789 (-2.63248 7.70496)
R2^2/D10^2 : 3.23849E-02 (-0.0294618 0.0623546)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.41 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.571632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.697e-07 8.050e-08
25- 50 2.722e-07 1.217e-07
50-150 1.823e-07 1.045e-07
15-150 6.242e-07 2.839e-07
Peak spectrum fit
Power-law model
Time interval is from 5.484 sec. to 6.484 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28680 ( -0.36102 0.415141 )
Norm@50keV : 3.59676E-03 ( -0.00110774 0.00110476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.71 using 59 PHA bins.
# Reduced chi-squared = 0.9247 for 57 degrees of freedom
# Null hypothesis probability = 6.366441e-01
Photon flux (15-150 keV) in 1 sec: 0.623988 ( -0.122076 0.122275 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42901e-08 ( -8.5787e-09 9.20392e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.484 sec. to 6.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.37848 ( -5.37358 2.76019 )
Epeak [keV] : 27.8077 ( -5.19582 5.67936 )
Norm@50keV : 6.47372 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8570 for 56 degrees of freedom
# Null hypothesis probability = 7.680257e-01
Photon flux (15-150 keV) in 1 sec: 0.594197 ( -0.114535 0.115622 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59272e-08 ( -5.7075e-09 7.2507e-09 ) ergs/cm2
Band function
Time interval is from 5.484 sec. to 6.484 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.84289 ( -2.46082 -1.37377 )
beta : -3.94780 ( 3.86957 1.52083 )
Epeak [keV] : 27.4752 ( -7.29877 5.67417 )
Norm@50keV : 2.79056 ( -3.14549 349.369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8627 for 55 degrees of freedom
# Null hypothesis probability = 7.554284e-01
Photon flux (15-150 keV) in 1 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] : 7.11986 (-1.16122 1.37643)
R^2/D10^2 : 1.18058 (-0.609317 1.25087)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.00 using 59 PHA bins.
# Reduced chi-squared = 0.8422 for 57 degrees of freedom
# Null hypothesis probability = 7.961723e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.782e-09 3.537e-09
25- 50 1.384e-08 5.224e-09
50-150 2.438e-09 1.643e-09
15-150 2.606e-08 7.910e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.1107 (-12.4228 25.0138)
Norm : 4.59554 (-1.4599 2.25535)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.53 using 59 PHA bins.
# Reduced chi-squared = 0.8864 for 57 degrees of freedom
# Null hypothesis probability = 7.149470e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.932e-09 2.399e-09
25- 50 1.214e-08 4.226e-09
50-150 7.816e-09 4.953e-09
15-150 2.989e-08 1.001e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 198.841 ( )
R1^2/D10^2 : 3.88982E-05 (-3.8851e-05 1.53565)
kT2 [keV] : 6.86563 (-6.86084 1.28946)
R2^2/D10^2 : 1.32867 (-0.649406 1.52171)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.66 using 59 PHA bins.
# Reduced chi-squared = 0.8726 for 55 degrees of freedom
# Reduced chi-squared = 0.8302 for 55 degrees of freedom
# Null hypothesis probability = 7.371939e-01
# Null hypothesis probability = 8.111697e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.799e-09 9.585e-07
25- 50 1.369e-08 5.825e-06
50-150 2.786e-09 5.665e-05
15-150 2.627e-08 3.896e-05
Plot creation:
Thu Oct 3 00:10:24 EDT 2013