batgrbproduct Analysis for Trigger=539563
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): Mon Nov 26 01:18:31 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger539563/GCN5_download_cron
======================================================================
Trigger: 00539563 Segment: 000
BAT Trigger Time: 375525157.184 [s; MET]
Trigger Stop: 375525157.696 [s; MET]
UTC: 2012-11-25T08:32:27.271500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 228.520506554365 Dec: 55.3218658361602 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.04
Image Trigger?: NO
Rate S/N Ratio: 10.4880884817015 [ if not an image trigger ]
Image S/N Ratio: 7.04
Flight Position: [ source = BAT ]
RA: 228.520506554365 Dec: 55.3218658361602 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 228.527013173271 Dec: 55.3188792800906 [deg; J2000]
{ 15h 14m 06.5s , +55d 19' 08.0" }
+/- 1.1549217848885 [arcmin] (estimated 90% radius based on SNR)
+/- 0.42418579086644 [arcmin] (formal 1-sigma fit error)
SNR: 24.7603945569611
Angular difference between Flight and Ground position is 0.285399 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 52.3679999709129 +/- 5.16336944429175
Measured from: 0.392000079154968
to: 52.7600000500679 [s; relative to TRIGTIME]
T50: 24.5839999318123 +/- 1.26370251135492
Measured from: 13.052000105381
to: 37.6360000371933 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 36.555999994278
to: 37.555999994278 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.87999999523163
to: 80.1599999666214 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.194006 2.726304 2.127423 0.448008
0.059340 0.062614 0.057013 0.053140 [error]
Peak 0.095145 0.114378 0.113227 0.035406
0.007048 0.007853 0.007621 0.006215 [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 6.57e-07 1.19e-06 1.64e-06 4.74e-06 4.72e-06 8.22e-06 erg/cm2
Error 3.79e-08 3.82e-08 6.12e-08 4.11e-07 1.45e-07 4.44e-07 erg/cm2
Peak flux Power-law 8.57e-01 9.34e-01 7.25e-01 9.23e-01 2.86e+00 3.44e+00 ph/cm2/s
Error 1.09e-01 6.96e-02 6.42e-02 1.76e-01 1.97e-01 2.47e-01 ph/cm2/s
Fluence Cutoff-PL 6.49e-07 1.19e-06 1.65e-06 4.38e-06 7.87e-06 0.00e+00 erg/cm2
Error 4.51e-08 4.07e-08 6.48e-08 8.76e-07 8.94e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.55e-01 9.34e-01 7.25e-01 9.18e-01 2.86e+00 3.42e+00 ph/cm2/s
Error 9.47e-02 6.96e-02 6.43e-02 1.73e-01 1.96e-01 2.47e-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 1.530 0.057 - - 5.75e-03 1.64e-04 46.940 57
CPL 1.492 0.146 662.8 0.0 5.99e-03 8.75e-04 47.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.366 0.128 - - 2.37e-02 1.64e-03 59.930 57
CPL 1.363 0.129 9999.4 0.0 2.38e-02 6.63e-03 59.960 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: 48.256000 sec.
T50 in the 50-300 keV band: 22.400000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 87.040 -6.880 80.160
T90 52.368 0.392 52.760
T50 24.584 13.052 37.636
Peak 1.000 36.556 37.556
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
228.5270 +55.3189 0.0077 23.0 -50.1 1.6116 24.8 TRIG_00539563
------------------------------------------
Foreground time interval of the image:
-6.880 10.617 (delta_t = 17.497 [sec])
Background time interval of the image:
-239.184 -6.880 (delta_t = 232.304 [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 -6.880 sec. to 80.160 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52954 ( -0.0570408 0.0571523 )
Norm@50keV : 5.74818E-03 ( -0.000164126 0.000164014 )
------------------------------------------------------------
# Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8236 for 57 degrees of freedom
# Null hypothesis probability = 8.264818e-01
Photon flux (15-150 keV) in 87.04 sec: 0.723451 ( -0.0224462 0.0225562 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.72428e-06 ( -1.45095e-07 1.4569e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.880 sec. to 80.160 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49159 ( -0.213274 0.07868 )
Epeak [keV] : 662.803 ( -993.789 -993.789 )
Norm@50keV : 5.98640E-03 ( -0.000309761 0.00143975 )
------------------------------------------------------------
# Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8393 for 56 degrees of freedom
# Null hypothesis probability = 7.987184e-01
Photon flux (15-150 keV) in 87.04 sec: 0.720137 ( -0.023753 0.025664 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86711e-06 ( -1.01597e-06 7.72228e-07 ) ergs/cm2
Band function
Time interval is from -6.880 sec. to 80.160 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.685289 ( 1.07827 1.07827 )
beta : -1.53838 ( -0.0696097 0.059635 )
Epeak [keV] : 38.1541 ( -37.2724 470.684 )
Norm@50keV : 2.46203E-02 ( -0.0250361 60.3837 )
------------------------------------------------------------
# Chi-Squared = 46.60 using 59 PHA bins.
# Reduced chi-squared = 0.8473 for 55 degrees of freedom
# Null hypothesis probability = 7.826636e-01
Photon flux (15-150 keV) in 87.04 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] : 16.2328 ( )
R^2/D10^2 : 5.84191E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 325.08 using 59 PHA bins.
# Reduced chi-squared = 5.7032 for 57 degrees of freedom
# Null hypothesis probability = 3.402270e-39
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.761e-07 1.623e-08
25- 50 1.176e-06 4.613e-08
50-150 2.178e-06 1.197e-07
15-150 3.631e-06 1.197e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.989 ( )
Norm : 2.93206 (-0.0832075 0.0832075)
------------------------------------------------------------
# Chi-Squared = 54.36 using 59 PHA bins.
# Reduced chi-squared = 0.9536 for 57 degrees of freedom
# Null hypothesis probability = 5.749067e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.356e-07 3.224e-07
25- 50 1.223e-06 6.215e-07
50-150 2.682e-06 1.363e-06
15-150 4.540e-06 2.309e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.54113 (-0.663321 0.732302)
R1^2/D10^2 : 0.959595 (-0.308591 0.490759)
kT2 [keV] : 26.5377 (-2.30572 2.9438)
R2^2/D10^2 : 8.94805E-03 (-0.00275438 0.00344084)
------------------------------------------------------------
# Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022515e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.244e-07 8.112e-08
25- 50 1.176e-06 7.398e-08
50-150 2.866e-06 1.945e-07
15-150 4.665e-06 2.550e-07
Peak spectrum fit
Power-law model
Time interval is from 36.556 sec. to 37.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36573 ( -0.127911 0.128989 )
Norm@50keV : 2.36754E-02 ( -0.00164213 0.00163596 )
------------------------------------------------------------
# Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.698978e-01
Photon flux (15-150 keV) in 1 sec: 2.86160 ( -0.196487 0.196768 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3043e-07 ( -1.83506e-08 1.85058e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 36.556 sec. to 37.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36266 ( -0.128744 0.129416 )
Epeak [keV] : 9999.36 ( -9998.07 -9998.07 )
Norm@50keV : 2.37641E-02 ( -0.00587055 0.0073799 )
------------------------------------------------------------
# Chi-Squared = 59.96 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 56 degrees of freedom
# Null hypothesis probability = 3.342500e-01
Photon flux (15-150 keV) in 1 sec: 2.86120 ( -0.19718 0.19561 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.42199e-07 ( -6.7583e-08 6.565e-08 ) ergs/cm2
Band function
Time interval is from 36.556 sec. to 37.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09253 ( 1.09339 1.09339 )
beta : -1.36571 ( 1.36572 0.127923 )
Epeak [keV] : 41.3538 ( -40.6774 -40.6774 )
Norm@50keV : 4.54875E-02 ( -0.0178429 3.39464 )
------------------------------------------------------------
# Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Null hypothesis probability = 3.015646e-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] : 17.0286 ( )
R^2/D10^2 : 0.208571 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 131.82 using 59 PHA bins.
# Reduced chi-squared = 2.3126 for 57 degrees of freedom
# Null hypothesis probability = 7.331343e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.231e-08 1.820e-09
25- 50 5.455e-08 5.790e-09
50-150 1.130e-07 1.625e-08
15-150 1.799e-07 1.565e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 11.6959 (-11.6959 -11.6959)
------------------------------------------------------------
# Chi-Squared = 69.23 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.283647e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.912e-08 1.524e-08
25- 50 5.602e-08 2.925e-08
50-150 1.228e-07 6.410e-08
15-150 2.080e-07 1.088e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.17853 (-1.18891 1.3955)
R1^2/D10^2 : 4.60441 (-2.38906 5.96141)
kT2 [keV] : 30.2742 (-5.30217 8.63111)
R2^2/D10^2 : 2.73018E-02 (-0.0146502 0.0239337)
------------------------------------------------------------
# Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.492005e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.822e-08 8.020e-09
25- 50 4.995e-08 1.003e-08
50-150 1.581e-07 4.291e-08
15-150 2.363e-07 5.070e-08
Plot creation:
Mon Nov 26 01:44:16 EST 2012