batgrbproduct Analysis for Trigger=559132
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 Jun 28 14:25:22 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger559132/batgroup_hand_proc
======================================================================
Trigger: 00559132 Segment: 000
BAT Trigger Time: 394016114.176 [s; MET]
Trigger Stop: 394016118.272 [s; MET]
UTC: 2013-06-27T08:55:03.453140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 184.445459834887 Dec: -37.0861049218717 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.41
Image Trigger?: NO
Rate S/N Ratio: 10.6770782520313 [ if not an image trigger ]
Image S/N Ratio: 7.41
Flight Position: [ source = BAT ]
RA: 184.445459834887 Dec: -37.0861049218717 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 184.415484273371 Dec: -37.1144018346037 [deg; J2000]
{ 12h 17m 39.7s , -37d 06' 51.8" }
+/- 2.82062946847177 [arcmin] (estimated 90% radius based on SNR)
+/- 1.41571929250444 [arcmin] (formal 1-sigma fit error)
SNR: 6.91459735758531
Angular difference between Flight and Ground position is 2.222678 arcmin
Partial Coding Fraction: 0.2011719 [ including projection effects ]
Duration
T90: 30.8480000495911 +/- 12.321238872777
Measured from: -4.28799998760223
to: 26.5600000619888 [s; relative to TRIGTIME]
T50: 10.6240000724792 +/- 8.0351229087008
Measured from: 0.575999975204468
to: 11.2000000476837 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.8759999871254
to: 2.8759999871254 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.18400001525879
to: 33.5680000185966 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.256892 0.681455 0.382411 0.009625
0.100952 0.095460 0.083602 0.070666 [error]
Peak 0.022043 0.073106 0.092386 -0.004928
0.016599 0.016236 0.015891 0.012065 [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 1.75e-07 2.61e-07 2.91e-07 6.12e-07 9.12e-07 1.34e-06 erg/cm2
Error 5.10e-08 5.14e-08 7.89e-08 3.33e-07 1.94e-07 4.13e-07 erg/cm2
Peak flux Power-law 5.68e-01 5.94e-01 4.39e-01 5.25e-01 1.80e+00 2.13e+00 ph/cm2/s
Error 2.32e-01 1.60e-01 1.20e-01 2.78e-01 4.55e-01 5.13e-01 ph/cm2/s
Fluence Cutoff-PL 1.35e-07 3.19e-07 2.97e-07 7.81e-08 8.16e-07 8.29e-07 erg/cm2
Error 5.86e-08 7.17e-08 1.05e-07 1.98e-07 2.62e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.71e-01 6.56e-01 5.75e-01 1.22e-01 1.61e+00 1.63e+00 ph/cm2/s
Error 2.48e-01 2.12e-01 1.70e-01 1.64e-01 4.57e-01 4.79e-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 1.844 0.320 - - 2.56e-03 5.40e-04 55.270 57
CPL -0.116 1.944 49.3 18.3 2.88e-02 2.73e-01 50.360 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 1.434 0.368 - - 1.47e-02 3.54e-03 61.260 57
CPL -1.307 2.644 68.1 23.5 2.41e-01 2.49e+00 54.630 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 38.752 -5.184 33.568
T90 30.848 -4.288 26.560
T50 10.624 0.576 11.200
Peak 1.000 1.876 2.876
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.4155 -37.1144 0.0278 48.3867 -144.0761 1.5975913 6.915 TRIG_00559132
Foreground time interval of the image:
-5.184 33.568 (delta_t = 38.752 [sec])
Background time interval of the image:
-60.176 -5.184 (delta_t = 54.992 [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 -5.184 sec. to 33.568 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84427 ( -0.311021 0.32881 )
Norm@50keV : 2.56009E-03 ( -0.000544232 0.00053545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 57 degrees of freedom
# Null hypothesis probability = 5.404164e-01
Photon flux (15-150 keV) in 38.75 sec: 0.359017 ( -0.0718409 0.0722072 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.1219e-07 ( -1.91943e-07 1.95164e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.184 sec. to 33.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.115940 ( -2.32503 1.56394 )
Epeak [keV] : 49.3158 ( -11.0822 25.474 )
Norm@50keV : 2.87710E-02 ( -0.028785 0.516512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.36 using 59 PHA bins.
# Reduced chi-squared = 0.8993 for 56 degrees of freedom
# Null hypothesis probability = 6.873377e-01
Photon flux (15-150 keV) in 38.75 sec: 0.335240 ( -0.072418 0.073872 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.15552e-07 ( -1.9029e-07 2.05115e-07 ) ergs/cm2
Band function
Time interval is from -5.184 sec. to 33.568 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.33551 -5 )
beta : -2.33101 ( -1.04103 0.481383 )
Epeak [keV] : 31.7789 ( -6.85009 7.37265 )
Norm@50keV : 85.0524 ( -15.9734 306.833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.95 using 59 PHA bins.
# Reduced chi-squared = 0.9082 for 55 degrees of freedom
# Null hypothesis probability = 6.675104e-01
Photon flux (15-150 keV) in 38.75 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] : 12.0715 (-2.21735 2.68029)
R^2/D10^2 : 8.90927E-02 (-0.0477375 0.101543)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.73 using 59 PHA bins.
# Reduced chi-squared = 0.9075 for 57 degrees of freedom
# Null hypothesis probability = 6.726225e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.065e-07 3.555e-08
25- 50 3.374e-07 1.060e-07
50-150 2.968e-07 1.213e-07
15-150 7.406e-07 2.439e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.3786 (-35.8257 96.7655)
Norm : 1.68377 (-0.419686 0.558751)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9212 for 57 degrees of freedom
# Null hypothesis probability = 6.440440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.700e-07 4.857e-08
25- 50 2.849e-07 8.194e-08
50-150 4.228e-07 2.895e-07
15-150 8.777e-07 3.687e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.70768 (-7.75084 -7.75084)
R1^2/D10^2 : 0.253485 (-0.243743 -0.243743)
kT2 [keV] : 17.4658 (-17.7559 -17.7559)
R2^2/D10^2 : 1.40344E-02 (-0.0126653 0.126968)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.97 using 59 PHA bins.
# Reduced chi-squared = 0.9086 for 55 degrees of freedom
# Null hypothesis probability = 6.666062e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 8.723e-08
25- 50 3.195e-07 1.967e-07
50-150 3.717e-07 2.339e-07
15-150 8.273e-07 4.495e-07
Peak spectrum fit
Power-law model
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43404 ( -0.366077 0.370555 )
Norm@50keV : 1.46813E-02 ( -0.00354382 0.00354163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.26 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.259181e-01
Photon flux (15-150 keV) in 1 sec: 1.80247 ( -0.45216 0.457485 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40888e-07 ( -3.55371e-08 3.59557e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.30693 ( -3.32238 1.96477 )
Epeak [keV] : 68.0895 ( -13.7799 33.3035 )
Norm@50keV : 0.240981 ( -0.243623 4.72646 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.63 using 59 PHA bins.
# Reduced chi-squared = 0.9756 for 56 degrees of freedom
# Null hypothesis probability = 5.266895e-01
Photon flux (15-150 keV) in 1 sec: 1.60782 ( -0.44664 0.4679 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30945e-07 ( -3.44302e-08 3.6222e-08 ) ergs/cm2
Band function
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.32104 ( -1.33833 -0.550427 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 67.7564 ( -13.5744 33.561 )
Norm@50keV : 0.247195 ( -0.246774 2.40997 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.64 using 59 PHA bins.
# Reduced chi-squared = 0.9934 for 55 degrees of freedom
# Null hypothesis probability = 4.885129e-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] : 17.3899 (-3.39282 4.32841)
R^2/D10^2 : 0.138817 (-0.0762538 0.157048)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.52 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 57 degrees of freedom
# Null hypothesis probability = 5.687080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.495e-09 4.362e-09
25- 50 3.826e-08 1.710e-08
50-150 8.320e-08 3.933e-08
15-150 1.300e-07 5.322e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-108.05 -199.363)
Norm : 7.62327 (-1.81282 1.95122)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.95 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 57 degrees of freedom
# Null hypothesis probability = 3.692009e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.898e-08 1.121e-08
25- 50 3.652e-08 2.154e-08
50-150 8.009e-08 4.704e-08
15-150 1.356e-07 8.185e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.51593 (-5.63276 180.495)
R1^2/D10^2 : 0.876633 (-0.851036 -0.851036)
kT2 [keV] : 18.0649 (-4.02524 181.831)
R2^2/D10^2 : 0.117230 (-0.115783 0.172607)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9882 for 55 degrees of freedom
# Null hypothesis probability = 4.994643e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.076e-08 5.660e-09
25- 50 3.805e-08 2.248e-08
50-150 8.429e-08 5.385e-08
15-150 1.331e-07 7.565e-08
Plot creation:
Fri Jun 28 14:46:26 EDT 2013