batgrbproduct Analysis for Trigger=582374
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): Sun Dec 29 21:33:11 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger582374/GCN5_download_cron
======================================================================
Trigger: 00582374 Segment: 000
BAT Trigger Time: 409991975.616 [s; MET]
Trigger Stop: 409991976.064 [s; MET]
UTC: 2013-12-29T06:39:24.163760 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms
BAT
RA: 85.2356212466857 Dec: -4.43148525974796 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.86
Image Trigger?: NO
Rate S/N Ratio: 20.174241001832 [ if not an image trigger ]
Image S/N Ratio: 7.86
Flight Position: [ source = BAT ]
RA: 85.2356212466857 Dec: -4.43148525974796 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 85.2359981451475 Dec: -4.40119036933186 [deg; J2000]
{ 05h 40m 56.6s , -04d 24' 04.3" }
+/- 0.573868946671734 [arcmin] (estimated 90% radius based on SNR)
+/- 0.155634833053716 [arcmin] (formal 1-sigma fit error)
SNR: 67.2468011596004
Angular difference between Flight and Ground position is 1.817833 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 13.8679999709129 +/- 0.428018690735031
Measured from: 2.20400011539459
to: 16.0720000863075 [s; relative to TRIGTIME]
T50: 8.25199991464615 +/- 0.141364796385792
Measured from: 5.97600013017654
to: 14.2280000448227 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.5479999780655
to: 14.5479999780655 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0799999833106995
to: 27.0360000133514 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.702567 3.005354 3.245847 1.059316
0.036005 0.040698 0.039508 0.030291 [error]
Peak 0.175221 0.399045 0.592267 0.262430
0.008999 0.011916 0.014401 0.011904 [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 4.99e-07 1.24e-06 2.45e-06 1.20e-05 6.61e-06 1.62e-05 erg/cm2
Error 2.03e-08 2.95e-08 4.37e-08 5.26e-07 1.16e-07 5.35e-07 erg/cm2
Peak flux Power-law 1.50e+00 2.69e+00 3.71e+00 1.06e+01 1.07e+01 1.85e+01 ph/cm2/s
Error 1.06e-01 1.15e-01 1.11e-01 7.34e-01 3.17e-01 7.43e-01 ph/cm2/s
Fluence Cutoff-PL 4.87e-07 1.24e-06 2.47e-06 1.11e-05 6.60e-06 1.52e-05 erg/cm2
Error 2.14e-08 2.98e-08 5.64e-08 1.36e-06 1.18e-07 1.35e-06 erg/cm2
Peak flux Cutoff-PL 1.46e+00 2.69e+00 3.75e+00 9.87e+00 1.07e+01 1.78e+01 ph/cm2/s
Error 1.08e-01 1.16e-01 1.16e-01 1.44e+00 3.20e-01 1.61e+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 1.015 0.033 - - 2.28e-02 4.16e-04 41.950 57
CPL 0.941 0.119 910.2 0.0 2.44e-02 1.80e-03 40.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.536 0.055 - - 9.08e-02 2.91e-03 44.650 57
CPL 0.440 0.157 999.5 0.0 9.96e-02 1.09e-02 44.330 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: 13.056000 sec.
T50 in the 50-300 keV band: 7.424000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.956 0.080 27.036
T90 13.868 2.204 16.072
T50 8.252 5.976 14.228
Peak 1.000 13.548 14.548
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
85.2360 -4.4012 0.0029 18.1 178.5 3.0379 67.2 TRIG_00582374
------------------------------------------
Foreground time interval of the image:
0.080 7.185 (delta_t = 7.105 [sec])
Background time interval of the image:
-103.415 -56.536 (delta_t = 46.879 [sec])
-55.616 0.080 (delta_t = 55.696 [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 0.080 sec. to 27.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01546 ( -0.0326791 0.03252 )
Norm@50keV : 2.27893E-02 ( -0.00041628 0.000414776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.95 using 59 PHA bins.
# Reduced chi-squared = 0.7359 for 57 degrees of freedom
# Null hypothesis probability = 9.323451e-01
Photon flux (15-150 keV) in 26.96 sec: 2.62594 ( -0.0748923 0.0500699 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.60779e-06 ( -1.15783e-07 1.16097e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.080 sec. to 27.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.941392 ( -0.131943 0.105353 )
Epeak [keV] : 910.189 ( -910.189 -910.189 )
Norm@50keV : 2.43772E-02 ( -0.000580741 0.00302464 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.99 using 59 PHA bins.
# Reduced chi-squared = 0.7320 for 56 degrees of freedom
# Null hypothesis probability = 9.337901e-01
Photon flux (15-150 keV) in 26.96 sec: 2.61340 ( -0.05397 0.05132 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.59628e-06 ( -1.19082e-07 1.17653e-07 ) ergs/cm2
Band function
Time interval is from 0.080 sec. to 27.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.99993 -4.99993 )
beta : -1.02000 ( -0.0331337 0.0331296 )
Epeak [keV] : 23.0591 ( -23.0591 4.33323 )
Norm@50keV : 2459.44 ( -41.6013 3.4087e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.45 using 59 PHA bins.
# Reduced chi-squared = 0.7537 for 55 degrees of freedom
# Null hypothesis probability = 9.116595e-01
Photon flux (15-150 keV) in 26.96 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] : 24.5457 ( )
R^2/D10^2 : 6.56227E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 564.70 using 59 PHA bins.
# Reduced chi-squared = 9.9070 for 57 degrees of freedom
# Null hypothesis probability = 1.147584e-84
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.870e-07 7.279e-09
25- 50 1.051e-06 2.952e-08
50-150 4.705e-06 1.105e-07
15-150 5.943e-06 1.227e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 11.4630 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 892.45 using 59 PHA bins.
# Reduced chi-squared = 15.657 for 57 degrees of freedom
# Null hypothesis probability = 2.179897e-150
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.695e-07 1.564e-08
25- 50 1.480e-06 2.912e-08
50-150 3.247e-06 5.662e-08
15-150 5.497e-06 1.078e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.07891 (-0.77045 0.834263)
R1^2/D10^2 : 0.815308 (-0.189805 0.263828)
kT2 [keV] : 38.5764 (-2.75338 3.53004)
R2^2/D10^2 : 1.41352E-02 (-0.00332919 0.00371614)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.89 using 59 PHA bins.
# Reduced chi-squared = 0.8889 for 55 degrees of freedom
# Null hypothesis probability = 7.059212e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.294e-07 3.073e-08
25- 50 1.270e-06 5.203e-08
50-150 4.927e-06 1.685e-07
15-150 6.626e-06 2.265e-07
Peak spectrum fit
Power-law model
Time interval is from 13.548 sec. to 14.548 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.536178 ( -0.0553009 0.0546322 )
Norm@50keV : 9.07654E-02 ( -0.00291637 0.00290139 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.65 using 59 PHA bins.
# Reduced chi-squared = 0.7834 for 57 degrees of freedom
# Null hypothesis probability = 8.827325e-01
Photon flux (15-150 keV) in 1 sec: 10.6891 ( -0.316598 0.316708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19747e-06 ( -3.87933e-08 3.88409e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.548 sec. to 14.548 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.440431 ( -0.200689 0.113574 )
Epeak [keV] : 999.461 ( -999.657 -999.657 )
Norm@50keV : 9.95744E-02 ( -0.00290867 0.0188017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.33 using 59 PHA bins.
# Reduced chi-squared = 0.7916 for 56 degrees of freedom
# Null hypothesis probability = 8.699720e-01
Photon flux (15-150 keV) in 1 sec: 10.6678 ( -0.3216 0.318 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19627e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 13.548 sec. to 14.548 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.728497 ( 0.728475 0.728475 )
beta : -0.536178 ( -0.0546191 0.0553187 )
Epeak [keV] : 24.6494 ( -24.6501 -24.6501 )
Norm@50keV : 0.116940 ( -0.025634 1.06157e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.65 using 59 PHA bins.
# Reduced chi-squared = 0.8119 for 55 degrees of freedom
# Null hypothesis probability = 8.393191e-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] : 31.3293 ( )
R^2/D10^2 : 0.152099 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 163.14 using 59 PHA bins.
# Reduced chi-squared = 2.8622 for 57 degrees of freedom
# Null hypothesis probability = 3.607450e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.273e-08 1.360e-09
25- 50 1.427e-07 7.100e-09
50-150 9.714e-07 3.900e-08
15-150 1.137e-06 4.150e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 36.9019 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 890.17 using 59 PHA bins.
# Reduced chi-squared = 15.617 for 57 degrees of freedom
# Null hypothesis probability = 6.343912e-150
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.189e-08 3.185e-09
25- 50 1.768e-07 6.250e-09
50-150 3.877e-07 1.540e-08
15-150 6.563e-07 2.380e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6588 (-1.91265 2.30387)
R1^2/D10^2 : 1.38524 (-0.51626 0.962906)
kT2 [keV] : 51.7583 (-7.90789 15.155)
R2^2/D10^2 : 3.62111E-02 (-0.0169607 0.0200672)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.22 using 59 PHA bins.
# Reduced chi-squared = 0.8040 for 55 degrees of freedom
# Null hypothesis probability = 8.506355e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.296e-08 6.345e-09
25- 50 1.637e-07 1.865e-08
50-150 1.004e-06 1.283e-07
15-150 1.211e-06 1.633e-07
Plot creation:
Sun Dec 29 21:57:16 EST 2013