batgrbproduct Analysis for Trigger=539357
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): Sat Nov 24 04:52:24 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger539357/GCN5_download_cron
======================================================================
Trigger: 00539357 Segment: 000
BAT Trigger Time: 375356832 [s; MET]
Trigger Stop: 375357216 [s; MET]
UTC: 2012-11-23T09:47:02.094700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.027396559161 Dec: -37.8385707612661 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.09
Flight Position: [ source = BAT ]
RA: 256.027396559161 Dec: -37.8385707612661 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.010462091333 Dec: -37.8321550504174 [deg; J2000]
{ 17h 04m 02.5s , -37d 49' 55.8" }
+/- 2.2478600770987 [arcmin] (estimated 90% radius based on SNR)
+/- 1.55514422055904 [arcmin] (formal 1-sigma fit error)
SNR: 9.56292710923374
Angular difference between Flight and Ground position is 0.890019 arcmin
Partial Coding Fraction: 0.3476562 [ including projection effects ]
Duration
T90: 411.74799990654 +/- 65.078218775839
Measured from: -33.6039998531342
to: 378.144000053406 [s; relative to TRIGTIME]
T50: 225.291999995708 +/- 83.8657045351443
Measured from: 39.8440001010895
to: 265.136000096798 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 391.360000014305
to: 392.360000014305 [s; relative to TRIGTIME]
Total Fluence
Measured from: -52.3439999818802
to: 392.888000011444 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.470206 1.603385 0.456140 0.275087
0.240691 0.235183 0.211250 0.213765 [error]
Peak 0.028721 0.028760 0.024446 0.005620
0.011364 0.011021 0.009920 0.009770 [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 7.69e-07 7.09e-07 4.52e-07 4.43e-07 2.11e-06 2.37e-06 erg/cm2
Error 1.28e-07 1.24e-07 1.61e-07 2.92e-07 3.86e-07 5.49e-07 erg/cm2
Peak flux Power-law 2.43e-01 2.33e-01 1.56e-01 1.64e-01 6.99e-01 7.96e-01 ph/cm2/s
Error 1.58e-01 9.51e-02 1.18e-01 2.04e-01 2.73e-01 3.07e-01 ph/cm2/s
Fluence Cutoff-PL 7.62e-07 7.94e-07 1.88e-07 5.36e-09 1.75e-06 0.00e+00 erg/cm2
Error 1.39e-07 1.61e-07 2.54e-07 2.17e-07 4.76e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.38e-01 2.36e-01 1.58e-01 1.44e-01 6.95e-01 7.74e-01 ph/cm2/s
Error 1.79e-01 1.05e-01 8.76e-02 2.01e-01 2.81e-01 3.41e-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 2.649 0.331 - - 4.58e-04 1.21e-04 50.580 57
CPL 0.433 2.651 20.9 0.0 1.61e-02 0.00e+00 47.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.577 0.751 - - 5.48e-03 2.22e-03 39.400 57
CPL 1.501 2.255 314.7 0.0 5.98e-03 1.25e-01 39.390 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 445.232 -52.344 392.888
T90 411.748 -33.604 378.144
T50 225.292 39.844 265.136
Peak 1.000 391.360 392.360
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.0105 -37.8322 0.0200 33.7 -103.8 5.3725 9.6 TRIG_00539357
------------------------------------------
Foreground time interval of the image:
-15.599 -12.030 (delta_t = 3.569 [sec])
-11.000 290.900 (delta_t = 301.900 [sec])
294.000 392.888 (delta_t = 98.888 [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
Multiple GTIs in the spectrum
tstart tstop
-52.344000 -12.030000
-11.000000 290.900000
294.000000 392.888000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.64921 ( -0.311304 0.350116 )
Norm@50keV : 4.58491E-04 ( -0.000119414 0.000122055 )
------------------------------------------------------------
# Chi-Squared = 50.58 using 59 PHA bins.
# Reduced chi-squared = 0.8874 for 57 degrees of freedom
# Null hypothesis probability = 7.130271e-01
Photon flux (15-150 keV) in 441.1 sec: 9.89715E-02 ( -0.0139537 0.0139593 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11468e-06 ( -3.74916e-07 3.97103e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-52.344000 -12.030000
-11.000000 290.900000
294.000000 392.888000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.432980 ( -3.71206 1.59005 )
Epeak [keV] : 20.9425 ( )
Norm@50keV : 1.61246E-02 ( )
------------------------------------------------------------
# Chi-Squared = 47.88 using 59 PHA bins.
# Reduced chi-squared = 0.8551 for 56 degrees of freedom
# Null hypothesis probability = 7.714304e-01
Photon flux (15-150 keV) in 441.1 sec: 9.42598E-02 ( -0.0139514 0.0142792 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74893e-06 ( -3.15867e-07 6.3649e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-52.344000 -12.030000
-11.000000 290.900000
294.000000 392.888000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.622262 ( -1.73815 0.29332 )
beta : -3.59762 ( 3.43278 0.819581 )
Epeak [keV] : 22.4430 ( -8.66001 5.83622 )
Norm@50keV : 9.96783E-02 ( -0.0964366 144.014 )
------------------------------------------------------------
# Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 55 degrees of freedom
# Null hypothesis probability = 7.770514e-01
Photon flux (15-150 keV) in 441.1 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] : 6.22256 (-0.825552 0.947446)
R^2/D10^2 : 0.311340 (-0.143377 0.271325)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 48.85 using 59 PHA bins.
# Reduced chi-squared = 0.8571 for 57 degrees of freedom
# Null hypothesis probability = 7.701769e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.432e-07 1.950e-07
25- 50 8.014e-07 2.181e-07
50-150 8.501e-08 5.087e-08
15-150 1.630e-06 3.573e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.1361 (-6.56845 10.1713)
Norm : 0.974474 (-0.285528 0.435157)
------------------------------------------------------------
# Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8464 for 57 degrees of freedom
# Null hypothesis probability = 7.889124e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.691e-07 1.487e-07
25- 50 7.704e-07 1.751e-07
50-150 3.110e-07 1.817e-07
15-150 1.850e-06 3.882e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.72583 (-5.30302 1.0502)
R1^2/D10^2 : 0.419826 (-0.204274 0.718325)
kT2 [keV] : 28.7322 (-29.7991 -30.4295)
R2^2/D10^2 : 2.18637E-04 (-0.00019588 0.258796)
------------------------------------------------------------
# Chi-Squared = 46.06 using 59 PHA bins.
# Reduced chi-squared = 0.8374 for 55 degrees of freedom
# Null hypothesis probability = 7.993708e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.647e-07 2.807e-07
25- 50 7.535e-07 3.229e-07
50-150 5.096e-07 3.421e-07
15-150 2.028e-06 8.057e-07
Peak spectrum fit
Power-law model
Time interval is from 391.360 sec. to 392.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57662 ( -0.728566 0.772581 )
Norm@50keV : 5.47657E-03 ( -0.00228048 0.00216301 )
------------------------------------------------------------
# Chi-Squared = 39.40 using 59 PHA bins.
# Reduced chi-squared = 0.6912 for 57 degrees of freedom
# Null hypothesis probability = 9.635091e-01
Photon flux (15-150 keV) in 1 sec: 0.698763 ( -0.271633 0.27362 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.13696e-08 ( -2.17806e-08 2.27153e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 391.360 sec. to 392.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50126 ( -3.38458 1.12461 )
Epeak [keV] : 314.655 ( )
Norm@50keV : 5.97805E-03 ( -0.00610633 0.244295 )
------------------------------------------------------------
# Chi-Squared = 39.39 using 59 PHA bins.
# Reduced chi-squared = 0.7035 for 56 degrees of freedom
# Null hypothesis probability = 9.548071e-01
Photon flux (15-150 keV) in 1 sec: 0.695126 ( -0.285454 0.276217 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.97128e-08 ( -5.08439e-08 8.85742e-08 ) ergs/cm2
Band function
Time interval is from 391.360 sec. to 392.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.43304 ( 3.28998 3.97039 )
beta : -1.57662 ( -0.773535 0.728041 )
Epeak [keV] : 103.941 ( -103.941 -103.941 )
Norm@50keV : 0.744343 ( -0.309957 0.293993 )
------------------------------------------------------------
# Chi-Squared = 39.40 using 59 PHA bins.
# Reduced chi-squared = 0.7164 for 55 degrees of freedom
# Null hypothesis probability = 9.442958e-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] : 16.7026 (-7.76003 12.5261)
R^2/D10^2 : 5.25877E-02 (-0.052274 0.415064)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 41.47 using 59 PHA bins.
# Reduced chi-squared = 0.7275 for 57 degrees of freedom
# Null hypothesis probability = 9.393188e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.002e-09 2.017e-09
25- 50 1.310e-08 8.335e-09
50-150 2.593e-08 1.726e-08
15-150 4.203e-08 2.631e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.897 -199.897)
Norm : 2.83115 (-1.07767 1.80095)
------------------------------------------------------------
# Chi-Squared = 39.42 using 59 PHA bins.
# Reduced chi-squared = 0.6916 for 57 degrees of freedom
# Null hypothesis probability = 9.632985e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.050e-09 4.347e-09
25- 50 1.356e-08 8.320e-09
50-150 2.974e-08 1.861e-08
15-150 5.035e-08 3.142e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.59971 (-4.59971 183.202)
R1^2/D10^2 : 3.90415 (-3.90415 14.9526)
kT2 [keV] : 22.5129 (-10.2773 -22.5129)
R2^2/D10^2 : 1.64390E-02 (-0.016439 0.126629)
------------------------------------------------------------
# Chi-Squared = 38.83 using 59 PHA bins.
# Reduced chi-squared = 0.7061 for 55 degrees of freedom
# Null hypothesis probability = 9.515332e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.243e-09 5.295e-09
25- 50 1.173e-08 6.175e-09
50-150 3.106e-08 2.225e-08
15-150 5.103e-08 2.845e-08
Plot creation:
Sat Nov 24 05:06:12 EST 2012