batgrbproduct Analysis for Trigger=580267
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 Dec 6 07:59:04 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger580267/GCN5_download_cron
======================================================================
Trigger: 00580267 Segment: 000
BAT Trigger Time: 407927930.304 [s; MET]
Trigger Stop: 407927932.352 [s; MET]
UTC: 2013-12-05T09:18:38.948060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 131.608992800002 Dec: -60.1740032566644 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.19
Image Trigger?: NO
Rate S/N Ratio: 11.13552872566 [ if not an image trigger ]
Image S/N Ratio: 8.19
Flight Position: [ source = BAT ]
RA: 131.608992800002 Dec: -60.1740032566644 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 131.573516999652 Dec: -60.1810367160261 [deg; J2000]
{ 08h 46m 17.6s , -60d 10' 51.7" }
+/- 2.76282710202926 [arcmin] (estimated 90% radius based on SNR)
+/- 1.72842323399839 [arcmin] (formal 1-sigma fit error)
SNR: 7.12218226270011
Angular difference between Flight and Ground position is 1.139576 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 37.5040000081062 +/- 9.56687614261378
Measured from: -17.3519998788834
to: 20.1520001292229 [s; relative to TRIGTIME]
T50: 26.2400000095367 +/- 18.3577392683422
Measured from: -7.23999989032745
to: 19.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 19.2999999523163
to: 20.2999999523163 [s; relative to TRIGTIME]
Total Fluence
Measured from: -18.5040000081062
to: 20.4079999923706 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.160206 0.138514 0.164951 0.028366
0.033894 0.034657 0.030380 0.026175 [error]
Peak 0.014789 0.028814 0.027225 0.015902
0.005780 0.006098 0.005563 0.004504 [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 4.19e-08 7.37e-08 9.93e-08 2.75e-07 2.88e-07 4.90e-07 erg/cm2
Error 1.39e-08 1.53e-08 3.01e-08 1.80e-07 7.12e-08 2.06e-07 erg/cm2
Peak flux Power-law 1.57e-01 1.98e-01 1.83e-01 2.95e-01 6.38e-01 8.32e-01 ph/cm2/s
Error 6.97e-02 5.21e-02 4.49e-02 1.67e-01 1.39e-01 1.95e-01 ph/cm2/s
Fluence Cutoff-PL 4.17e-08 7.42e-08 9.97e-08 2.56e-07 2.87e-07 4.71e-07 erg/cm2
Error 1.45e-08 1.72e-08 1.60e-08 1.99e-07 7.35e-08 1.96e-07 erg/cm2
Peak flux Cutoff-PL 1.60e-01 2.00e-01 1.82e-01 2.88e-01 6.39e-01 8.25e-01 ph/cm2/s
Error 6.91e-02 5.19e-02 4.55e-02 2.51e-01 1.39e-01 2.12e-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 1.570 0.385 - - 7.89e-04 1.77e-04 54.380 57
CPL 1.568 0.946 9971.6 0.0 7.91e-04 1.81e-03 54.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.118 0.412 - - 5.49e-03 1.16e-03 35.510 57
CPL 1.126 0.441 9999.4 0.0 5.52e-03 4.57e-03 35.520 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: 1.088000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 38.912 -18.504 20.408
T90 37.504 -17.352 20.152
T50 26.240 -7.240 19.000
Peak 1.000 19.300 20.300
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
131.5735 -60.1810 0.0271 19.7 -33.2 0.6653 7.1 TRIG_00580267
------------------------------------------
Foreground time interval of the image:
-18.504 20.408 (delta_t = 38.912 [sec])
Background time interval of the image:
-51.003 -18.504 (delta_t = 32.499 [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 -18.504 sec. to 20.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57021 ( -0.37434 0.39546 )
Norm@50keV : 7.88933E-04 ( -0.000180078 0.000174035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9540 for 57 degrees of freedom
# Null hypothesis probability = 5.740532e-01
Photon flux (15-150 keV) in 38.91 sec: 0.100468 ( -0.0207064 0.0207228 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88182e-07 ( -7.0224e-08 7.22672e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -18.504 sec. to 20.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56794 ( -1.35233 0.538775 )
Epeak [keV] : 9971.56 ( )
Norm@50keV : 7.91018E-04 ( -0.000181653 0.00344033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9710 for 56 degrees of freedom
# Null hypothesis probability = 5.364903e-01
Photon flux (15-150 keV) in 38.91 sec: 0.100245 ( -0.0212529 0.020877 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86911e-07 ( -7.3645e-08 7.32901e-08 ) ergs/cm2
Band function
Time interval is from -18.504 sec. to 20.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.53089 ( -5.74836 0.808459 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 592.989 ( -190.86 -240.282 )
Norm@50keV : 8.26354E-04 ( -0.000217156 0.00339938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9886 for 55 degrees of freedom
# Null hypothesis probability = 4.984584e-01
Photon flux (15-150 keV) in 38.91 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] : 15.9456 (-4.31105 5.59035)
R^2/D10^2 : 8.98216E-03 (-0.00570677 0.0175839)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.37 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 57 degrees of freedom
# Null hypothesis probability = 2.911214e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.839e-08 9.372e-09
25- 50 7.715e-08 2.881e-08
50-150 1.369e-07 6.136e-08
15-150 2.325e-07 9.755e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.337 (-122.758 -199.343)
Norm : 0.407912 (-0.0835539 0.103168)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9567 for 57 degrees of freedom
# Null hypothesis probability = 5.681341e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.952e-08 2.335e-08
25- 50 7.603e-08 4.428e-08
50-150 1.667e-07 9.681e-08
15-150 2.823e-07 1.656e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.46102 (-1.93954 3.81248)
R1^2/D10^2 : 0.634407 (-0.546718 11.1152)
kT2 [keV] : 22.7260 (-6.57382 13.1696)
R2^2/D10^2 : 2.33259E-03 (-0.00181643 0.0052896)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.28 using 59 PHA bins.
# Reduced chi-squared = 0.9506 for 55 degrees of freedom
# Null hypothesis probability = 5.790479e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.572e-08 2.617e-08
25- 50 6.417e-08 3.305e-08
50-150 1.781e-07 1.112e-07
15-150 2.880e-07 1.579e-07
Peak spectrum fit
Power-law model
Time interval is from 19.300 sec. to 20.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11806 ( -0.423075 0.401511 )
Norm@50keV : 5.48892E-03 ( -0.00116481 0.00116364 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.51 using 59 PHA bins.
# Reduced chi-squared = 0.6230 for 57 degrees of freedom
# Null hypothesis probability = 9.886163e-01
Photon flux (15-150 keV) in 1 sec: 0.637840 ( -0.139337 0.139661 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70602e-08 ( -1.35564e-08 1.3759e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 19.300 sec. to 20.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12593 ( -0.48846 0.393327 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 5.51852E-03 ( -0.001168 0.00797114 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.52 using 59 PHA bins.
# Reduced chi-squared = 0.6343 for 56 degrees of freedom
# Null hypothesis probability = 9.851445e-01
Photon flux (15-150 keV) in 1 sec: 0.639426 ( -0.140579 0.138099 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.63492e-08 ( -1.28967e-08 1.42745e-08 ) ergs/cm2
Band function
Time interval is from 19.300 sec. to 20.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.916193 ( 0.916216 0.916216 )
beta : -1.11805 ( 1.11804 0.423077 )
Epeak [keV] : 52.5610 ( -52.5311 -52.5311 )
Norm@50keV : 9.33495E-03 ( -0.00500475 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.51 using 59 PHA bins.
# Reduced chi-squared = 0.6456 for 55 degrees of freedom
# Null hypothesis probability = 9.809131e-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] : 20.8080 (-6.18947 10.6724)
R^2/D10^2 : 2.54351E-02 (-0.0181378 0.0542346)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.04 using 59 PHA bins.
# Reduced chi-squared = 0.7551 for 57 degrees of freedom
# Null hypothesis probability = 9.144765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.089e-09 1.133e-09
25- 50 1.067e-08 4.504e-09
50-150 3.442e-08 1.788e-08
15-150 4.718e-08 1.902e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.61151 (-0.571045 0.571015)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.25 using 59 PHA bins.
# Reduced chi-squared = 0.6886 for 57 degrees of freedom
# Null hypothesis probability = 9.649439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.506e-09 3.903e-09
25- 50 1.251e-08 7.260e-09
50-150 2.745e-08 1.611e-08
15-150 4.647e-08 2.719e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.67396 (-5.97987 7.33446)
R1^2/D10^2 : 0.308148 (-0.245027 0.592956)
kT2 [keV] : 56.4524 (-36.1975 -60.2622)
R2^2/D10^2 : 1.24495E-03 (-0.000977939 0.0181489)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.61 using 59 PHA bins.
# Reduced chi-squared = 0.6474 for 55 degrees of freedom
# Null hypothesis probability = 9.803254e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.816e-09 2.907e-09
25- 50 1.178e-08 6.390e-09
50-150 4.287e-08 2.360e-08
15-150 5.947e-08 3.065e-08
Plot creation:
Fri Dec 6 08:18:28 EST 2013