batgrbproduct Analysis for Trigger=553132
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): Tue Apr 9 15:02:25 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger553132/batgroup_hand_proc
======================================================================
Trigger: 00553132 Segment: 000
BAT Trigger Time: 387150709.248 [s; MET]
Trigger Stop: 387150713.344 [s; MET]
UTC: 2013-04-08T21:51:38.829980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 134.401018403739 Dec: -32.3606906437164 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.51
Image Trigger?: NO
Rate S/N Ratio: 69.5701085237043 [ if not an image trigger ]
Image S/N Ratio: 7.51
Flight Position: [ source = BAT ]
RA: 134.401018403739 Dec: -32.3606906437164 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 134.398091873555 Dec: -32.3627518739197 [deg; J2000]
{ 08h 57m 35.5s , -32d 21' 45.9" }
+/- 2.18589897553986 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06890188095153 [arcmin] (formal 1-sigma fit error)
SNR: 9.95250815424325
Angular difference between Flight and Ground position is 0.193117 arcmin
Partial Coding Fraction: 0.06640625 [ including projection effects ]
Duration
T90: 28.2240000367165 +/- 13.0660353517987
Measured from: 0.304000079631805
to: 28.5280001163483 [s; relative to TRIGTIME]
T50: 9.98400002717972 +/- 6.73947656791118
Measured from: 1.39200007915497
to: 11.3760001063347 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.11599999666214
to: 2.11599999666214 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.144000053405762
to: 33.5199999809265 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.548429 0.903576 1.200542 0.573367
0.147624 0.157751 0.142271 0.128175 [error]
Peak 0.093451 0.189190 0.196854 0.107795
0.028549 0.035109 0.034912 0.032034 [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 2.44e-07 5.13e-07 8.47e-07 3.16e-06 2.33e-06 4.77e-06 erg/cm2
Error 7.73e-08 9.86e-08 1.35e-07 1.15e-06 3.51e-07 1.19e-06 erg/cm2
Peak flux Power-law 1.38e+00 1.59e+00 1.31e+00 1.82e+00 4.94e+00 6.10e+00 ph/cm2/s
Error 5.18e-01 3.71e-01 2.77e-01 8.01e-01 1.01e+00 1.18e+00 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.28e+00 1.62e+00 1.37e+00 1.39e+00 4.89e+00 5.66e+00 ph/cm2/s
Error 6.15e-01 4.05e-01 3.49e-01 1.32e+00 1.03e+00 1.52e+00 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 1.277 0.262 - - 6.98e-03 1.07e-03 0.000 57
CPL 1.035 1.550 244.5 0.0 8.82e-03 1.02e-02 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.275 0.326 - - 4.16e-02 8.01e-03 0.000 57
CPL 0.980 0.305 198.4 0.0 5.67e-02 1.23e-01 0.000 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: 4.544000 sec.
T50 in the 50-300 keV band: 2.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 33.664 -0.144 33.520
T90 28.224 0.304 28.528
T50 9.984 1.392 11.376
Peak 1.000 1.116 2.116
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
134.3981 -32.3628 0.0194 58.3259 -173.4409 3.4111057 9.953 TRIG_00553132
Foreground time interval of the image:
-0.144 33.520 (delta_t = 33.664 [sec])
Background time interval of the image:
-239.248 -0.144 (delta_t = 239.104 [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 -0.144 sec. to 33.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27745 ( -0.267322 0.257192 )
Norm@50keV : 6.97920E-03 ( -0.00107865 0.00106702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.96 using 59 PHA bins.
# Reduced chi-squared = 0.9466 for 57 degrees of freedom
# Null hypothesis probability = 5.900322e-01
Photon flux (15-150 keV) in 33.66 sec: 0.829282 ( -0.14062 0.142613 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.33447e-06 ( -3.51e-07 3.51276e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.144 sec. to 33.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03492 ( -1.21628 1.88377 )
Epeak [keV] : 244.534 ( -244.285 -244.285 )
Norm@50keV : 8.81706E-03 ( -0.00280861 0.0176355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9606 for 56 degrees of freedom
# Null hypothesis probability = 5.588978e-01
Photon flux (15-150 keV) in 33.66 sec: 0.818199 ( -0.147408 0.14763 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.144 sec. to 33.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.970285 ( 0.793887 0.793887 )
beta : -2.83779 ( 8.72077 16.981 )
Epeak [keV] : 211.813 ( -106.409 -213.493 )
Norm@50keV : 9.33935E-03 ( -0.0036283 0.00700455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.81 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 55 degrees of freedom
# Null hypothesis probability = 5.203140e-01
Photon flux (15-150 keV) in 33.66 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] : 21.7011 (-3.57737 4.70553)
R^2/D10^2 : 2.85822E-02 (-0.0139829 0.0246709)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.93 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.045373e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.437e-08 2.652e-08
25- 50 4.425e-07 1.108e-07
50-150 1.556e-06 3.935e-07
15-150 2.083e-06 4.778e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.61288 (-0.545329 0.545081)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.08 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.351828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.031e-07 1.739e-07
25- 50 5.830e-07 3.255e-07
50-150 1.279e-06 7.276e-07
15-150 2.165e-06 1.204e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.19994 (-2.49941 4.68385)
R1^2/D10^2 : 1.13662 (-0.981643 9.34547)
kT2 [keV] : 28.3701 (-6.52712 15.9015)
R2^2/D10^2 : 1.03441E-02 (-0.00798922 0.0175119)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9588 for 55 degrees of freedom
# Null hypothesis probability = 5.616555e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.499e-07 1.354e-07
25- 50 4.920e-07 2.447e-07
50-150 1.607e-06 8.755e-07
15-150 2.349e-06 1.072e-06
Peak spectrum fit
Power-law model
Time interval is from 1.116 sec. to 2.116 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27531 ( -0.329572 0.323028 )
Norm@50keV : 4.16122E-02 ( -0.00801658 0.00799917 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.42 using 59 PHA bins.
# Reduced chi-squared = 0.9371 for 57 degrees of freedom
# Null hypothesis probability = 6.102891e-01
Photon flux (15-150 keV) in 1 sec: 4.94254 ( -1.01104 1.01826 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13735e-07 ( -8.30838e-08 8.33752e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.116 sec. to 2.116 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.979836 ( -1.5895 -0.979838 )
Epeak [keV] : 198.421 ( -198.421 -198.421 )
Norm@50keV : 5.66596E-02 ( -0.0224204 0.223521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.27 using 59 PHA bins.
# Reduced chi-squared = 0.9512 for 56 degrees of freedom
# Null hypothesis probability = 5.790371e-01
Photon flux (15-150 keV) in 1 sec: 4.89416 ( -1.02878 1.03205 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11195e-07 ( -8.5469e-08 8.4597e-08 ) ergs/cm2
Band function
Time interval is from 1.116 sec. to 2.116 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.66081E-02 ( 0.393853 0.393853 )
beta : -1.40312 ( 1.39592 0.428264 )
Epeak [keV] : 62.3765 ( -62.4231 241.561 )
Norm@50keV : 0.199725 ( -0.210143 504.299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.05 using 59 PHA bins.
# Reduced chi-squared = 0.9646 for 55 degrees of freedom
# Null hypothesis probability = 5.493328e-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] : 19.1474 (-4.09794 5.71608)
R^2/D10^2 : 0.264359 (-0.155977 0.335389)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.163047e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.900e-08 8.003e-09
25- 50 9.187e-08 3.476e-08
50-150 2.479e-07 9.295e-08
15-150 3.588e-07 1.086e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 20.9723 (-4.08004 4.07939)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.68 using 59 PHA bins.
# Reduced chi-squared = 0.9768 for 57 degrees of freedom
# Null hypothesis probability = 5.248959e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.223e-08 3.072e-08
25- 50 1.005e-07 5.790e-08
50-150 2.203e-07 1.278e-07
15-150 3.730e-07 2.151e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.41235 (-5.51424 6.96339)
R1^2/D10^2 : 1.76642 (-1.43554 35.3283)
kT2 [keV] : 36.5244 (-32.6318 -36.5244)
R2^2/D10^2 : 2.38865E-02 (-0.0220181 0.181859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.09 using 59 PHA bins.
# Reduced chi-squared = 0.9653 for 55 degrees of freedom
# Null hypothesis probability = 5.478915e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.551e-08 2.189e-08
25- 50 9.993e-08 5.610e-08
50-150 2.781e-07 1.461e-07
15-150 4.135e-07 2.172e-07
Plot creation:
Tue Apr 9 15:32:15 EDT 2013