batgrbproduct Analysis for Trigger=535733
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): Fri Oct 12 00:56:28 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger535733/GCN5_download_cron
======================================================================
Trigger: 00535733 Segment: 000
BAT Trigger Time: 371606272 [s; MET]
Trigger Stop: 371606336 [s; MET]
UTC: 2012-10-10T23:57:42.254480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 277.193008572468 Dec: -10.4787267319539 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.12
Flight Position: [ source = BAT ]
RA: 277.193008572468 Dec: -10.4787267319539 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 277.21022552766 Dec: -10.4814295938366 [deg; J2000]
{ 18h 28m 50.5s , -10d 28' 53.1" }
+/- 3.55144984767714 [arcmin] (estimated 90% radius based on SNR)
+/- 1.96154356456243 [arcmin] (formal 1-sigma fit error)
SNR: 4.97536037146653
Angular difference between Flight and Ground position is 1.028649 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.237293 0.159006 0.006685 0.008292
0.050457 0.046271 0.037386 0.030710 [error]
Peak 0.237293 0.159006 0.006685 0.008292
0.050457 0.046271 0.037386 0.030710 [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 6.85e-08 5.42e-08 2.89e-08 2.24e-08 1.62e-07 1.74e-07 erg/cm2
Error 2.09e-08 2.16e-08 2.27e-08 3.66e-08 6.12e-08 7.94e-08 erg/cm2
Peak flux Power-law 3.56e-02 1.58e-02 4.21e-03 1.39e-03 5.64e-02 5.70e-02 ph/cm2/s
Error 1.10e-02 6.03e-03 3.20e-03 2.12e-03 1.64e-02 1.67e-02 ph/cm2/s
Fluence Cutoff-PL 7.36e-08 5.70e-08 1.27e-09 3.06e-14 1.32e-07 0.00e+00 erg/cm2
Error 2.45e-08 2.97e-08 1.47e-08 3.80e-09 4.33e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.67e-02 1.79e-02 2.26e-04 2.85e-09 5.48e-02 5.48e-02 ph/cm2/s
Error 1.30e-02 8.48e-03 2.21e-03 2.83e-04 1.55e-02 1.55e-02 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 2.909 0.703 - - 2.19e-04 1.30e-04 41.830 57
CPL -1.643 0.000 21.3 0.0 4.98e-01 0.00e+00 38.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.909 0.703 - - 2.19e-04 1.30e-04 41.830 57
CPL -1.643 0.000 21.3 0.0 4.98e-01 0.00e+00 38.720 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
277.2102 -10.4814 0.0387 6.2 46.8 0.4640 5.0 TRIG_00535733
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.90890 ( -0.611526 0.795431 )
Norm@50keV : 2.19043E-04 ( -0.000120498 0.000139486 )
------------------------------------------------------------
# Chi-Squared = 41.83 using 59 PHA bins.
# Reduced chi-squared = 0.7338 for 57 degrees of freedom
# Null hypothesis probability = 9.341384e-01
Photon flux (15-150 keV) in 64 sec: 5.64212E-02 ( -0.0163305 0.016433 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61754e-07 ( -5.71572e-08 6.53011e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.64252 ( )
Epeak [keV] : 21.3484 ( )
Norm@50keV : 0.497780 ( )
------------------------------------------------------------
# Chi-Squared = 38.72 using 59 PHA bins.
# Reduced chi-squared = 0.6914 for 56 degrees of freedom
# Null hypothesis probability = 9.620333e-01
Photon flux (15-150 keV) in 64 sec: 5.48218E-02 ( -0.0152684 0.0156406 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3186e-07 ( -3.88858e-08 4.77754e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.28474 ( 1.70076 1.70076 )
beta : -10.00000 ( 2.66445e+06 2.66446e+06 )
Epeak [keV] : 22.7250 ( -17.0484 5.87421 )
Norm@50keV : 48.5348 ( -53.1414 19.8954 )
------------------------------------------------------------
# Chi-Squared = 38.43 using 59 PHA bins.
# Reduced chi-squared = 0.6986 for 55 degrees of freedom
# Null hypothesis probability = 9.562909e-01
Photon flux (15-150 keV) in 64 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] : 5.46455 (-1.22995 1.57458)
R^2/D10^2 : 0.335246 (-0.335244 0.742204)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 38.69 using 59 PHA bins.
# Reduced chi-squared = 0.6787 for 57 degrees of freedom
# Null hypothesis probability = 9.698847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.349e-08 4.397e-08
25- 50 5.938e-08 3.670e-08
50-150 3.647e-09 3.331e-09
15-150 1.365e-07 8.310e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.2320 (-7.62533 15.3607)
Norm : 0.785022 (-0.391836 0.873759)
------------------------------------------------------------
# Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7023 for 57 degrees of freedom
# Null hypothesis probability = 9.570400e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.173e-08 4.095e-08
25- 50 5.832e-08 3.581e-08
50-150 1.488e-08 1.455e-08
15-150 1.449e-07 8.436e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 198.902 ( )
R1^2/D10^2 : 1.14756E-06 (-1.15258e-06 0.000118691)
kT2 [keV] : 5.43322 (-1.24168 1.55363)
R2^2/D10^2 : 0.341892 (-0.341996 0.785547)
------------------------------------------------------------
# Chi-Squared = 38.69 using 59 PHA bins.
# Chi-Squared = 38.54 using 59 PHA bins.
# Reduced chi-squared = 0.7034 for 55 degrees of freedom
# Reduced chi-squared = 0.7007 for 55 degrees of freedom
# Null hypothesis probability = 9.532694e-01
# Null hypothesis probability = 9.550026e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.331e-08 1.889e+00
25- 50 5.966e-08 1.390e+01
50-150 3.715e-09 3.606e+02
15-150 1.367e-07 4.195e+02
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.90890 ( -0.611526 0.795431 )
Norm@50keV : 2.19043E-04 ( -0.000120498 0.000139486 )
------------------------------------------------------------
# Chi-Squared = 41.83 using 59 PHA bins.
# Reduced chi-squared = 0.7338 for 57 degrees of freedom
# Null hypothesis probability = 9.341384e-01
Photon flux (15-150 keV) in 64 sec: 5.64212E-02 ( -0.0163305 0.016433 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61754e-07 ( -5.71572e-08 6.53011e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.64252 ( )
Epeak [keV] : 21.3484 ( )
Norm@50keV : 0.497780 ( )
------------------------------------------------------------
# Chi-Squared = 38.72 using 59 PHA bins.
# Reduced chi-squared = 0.6914 for 56 degrees of freedom
# Null hypothesis probability = 9.620333e-01
Photon flux (15-150 keV) in 64 sec: 5.48218E-02 ( -0.0152684 0.0156406 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3186e-07 ( -3.88858e-08 4.78976e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.28474 ( 1.70076 1.70076 )
beta : -10.00000 ( 2.66445e+06 2.66446e+06 )
Epeak [keV] : 22.7250 ( -17.125 5.87421 )
Norm@50keV : 48.5348 ( -53.1414 19.8954 )
------------------------------------------------------------
# Chi-Squared = 38.43 using 59 PHA bins.
# Reduced chi-squared = 0.6986 for 55 degrees of freedom
# Null hypothesis probability = 9.562909e-01
Photon flux (15-150 keV) in 64 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] : 5.46455 (-1.22995 1.57458)
R^2/D10^2 : 0.335246 (-0.335244 0.742204)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 38.69 using 59 PHA bins.
# Reduced chi-squared = 0.6787 for 57 degrees of freedom
# Null hypothesis probability = 9.698847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.349e-08 4.451e-08
25- 50 5.938e-08 3.798e-08
50-150 3.647e-09 3.421e-09
15-150 1.365e-07 8.387e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.2320 (-7.62533 15.3607)
Norm : 0.785022 (-0.391836 0.873759)
------------------------------------------------------------
# Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7023 for 57 degrees of freedom
# Null hypothesis probability = 9.570400e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.173e-08 4.115e-08
25- 50 5.832e-08 3.536e-08
50-150 1.488e-08 1.353e-08
15-150 1.449e-07 8.159e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 198.902 ( )
R1^2/D10^2 : 1.14756E-06 (-1.15258e-06 0.000118691)
kT2 [keV] : 5.43322 (-1.24168 1.55363)
R2^2/D10^2 : 0.341892 (-0.341996 0.785547)
------------------------------------------------------------
# Chi-Squared = 38.69 using 59 PHA bins.
# Chi-Squared = 38.54 using 59 PHA bins.
# Reduced chi-squared = 0.7034 for 55 degrees of freedom
# Reduced chi-squared = 0.7007 for 55 degrees of freedom
# Null hypothesis probability = 9.532694e-01
# Null hypothesis probability = 9.550026e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.331e-08 1.767e+00
25- 50 5.966e-08 1.576e+01
50-150 3.715e-09 3.405e+02
15-150 1.367e-07 3.667e+02
Plot creation:
Fri Oct 12 01:20:19 EDT 2012