batgrbproduct Analysis for Trigger=575754
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): Thu Oct 24 22:03:30 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger575754/GCN5_download_cron
======================================================================
Trigger: 00575754 Segment: 000
BAT Trigger Time: 404343342.592 [s; MET]
Trigger Stop: 404343346.688 [s; MET]
UTC: 2013-10-24T21:35:31.401340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 144.402931552422 Dec: 44.2397294748877 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.93
Image Trigger?: NO
Rate S/N Ratio: 10.770329614269 [ if not an image trigger ]
Image S/N Ratio: 6.93
Flight Position: [ source = BAT ]
RA: 144.402931552422 Dec: 44.2397294748877 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 144.463555016745 Dec: 44.2839103905195 [deg; J2000]
{ 09h 37m 51.3s , +44d 17' 02.1" }
+/- 2.11163239931885 [arcmin] (estimated 90% radius based on SNR)
+/- 0.841245613917659 [arcmin] (formal 1-sigma fit error)
SNR: 10.4562974066937
Angular difference between Flight and Ground position is 3.716563 arcmin
Partial Coding Fraction: 0.40625 [ including projection effects ]
Duration
T90: 64 +/- 22.6274169979695
Measured from: -12.5919998884201
to: 51.4080001115799 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: 3.4080001115799
to: 35.4080001115799 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.9079999923706
to: 11.9079999923706 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.5920000076294
to: 51.4079999923706 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.284387 0.371759 0.687883 0.198164
0.065547 0.069065 0.062951 0.058589 [error]
Peak 0.003697 -0.002551 0.006159 0.002525
0.008427 0.008457 0.007764 0.007420 [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 7.18e-08 1.97e-07 4.38e-07 2.58e-06 1.18e-06 3.28e-06 erg/cm2
Error 2.06e-08 3.40e-08 5.77e-08 8.07e-07 1.57e-07 8.25e-07 erg/cm2
Peak flux Power-law 1.47e-03 7.36e-03 3.17e-02 5.35e-01 9.61e-02 5.76e-01 ph/cm2/s
Error 3.47e-02 3.67e-02 4.80e-02 7.17e-01 1.32e-01 7.45e-01 ph/cm2/s
Fluence Cutoff-PL 5.29e-08 2.01e-07 4.84e-07 9.76e-07 1.14e-06 1.71e-06 erg/cm2
Error 2.71e-08 3.89e-08 7.68e-08 1.17e-06 1.68e-07 1.08e-06 erg/cm2
Peak flux Cutoff-PL 7.04e-04 5.54e-03 3.26e-02 3.71e-01 9.87e-02 3.57e-01 ph/cm2/s
Error 3.45e-02 3.66e-02 6.57e-02 9.58e-01 1.31e-01 2.05e+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 0.848 0.229 - - 1.61e-03 2.18e-04 50.600 57
CPL -0.122 1.216 135.3 -45.2 3.97e-03 5.73e-03 48.030 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.141 0.000 - - 3.89e-04 1.12e-03 35.530 57
CPL -1.833 0.000 587.9 0.0 4.97e-04 2.63e-01 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: 56.000000 sec.
T50 in the 50-300 keV band: 26.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -12.592 51.408
T90 64.000 -12.592 51.408
T50 32.000 3.408 35.408
Peak 1.000 10.908 11.908
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
144.4636 +44.2839 0.0183 28.3 82.7 1.9750 10.5 TRIG_00575754
------------------------------------------
Foreground time interval of the image:
-12.592 47.609 (delta_t = 60.201 [sec])
Background time interval of the image:
-60.592 -12.592 (delta_t = 48.000 [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 -12.592 sec. to 51.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.848099 ( -0.235642 0.222159 )
Norm@50keV : 1.61180E-03 ( -0.000219671 0.000216335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.60 using 59 PHA bins.
# Reduced chi-squared = 0.8878 for 57 degrees of freedom
# Null hypothesis probability = 7.122639e-01
Photon flux (15-150 keV) in 64 sec: 0.185024 ( -0.0246789 0.0248531 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18173e-06 ( -1.56218e-07 1.56933e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.592 sec. to 51.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.121774 ( -1.41231 1.01997 )
Epeak [keV] : 135.346 ( -44.9246 -135.345 )
Norm@50keV : 3.96567E-03 ( -0.00241985 0.00904497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.03 using 59 PHA bins.
# Reduced chi-squared = 0.8577 for 56 degrees of freedom
# Null hypothesis probability = 7.668009e-01
Photon flux (15-150 keV) in 64 sec: 0.176530 ( -0.026581 0.02653 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13789e-06 ( -1.69075e-07 1.67034e-07 ) ergs/cm2
Band function
Time interval is from -12.592 sec. to 51.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.120473 ( -0.941217 1.20748 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 135.423 ( -75.8228 337.549 )
Norm@50keV : 3.96152E-03 ( -0.00239225 0.00904785 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.03 using 59 PHA bins.
# Reduced chi-squared = 0.8733 for 55 degrees of freedom
# Null hypothesis probability = 7.358664e-01
Photon flux (15-150 keV) in 64 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] : 24.8977 (-3.70017 4.87587)
R^2/D10^2 : 4.74769E-03 (-0.00198765 0.00309421)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.07 using 59 PHA bins.
# Reduced chi-squared = 0.8783 for 57 degrees of freedom
# Null hypothesis probability = 7.306282e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.279e-08 8.787e-09
25- 50 1.856e-07 4.275e-08
50-150 8.538e-07 1.946e-07
15-150 1.072e-06 2.128e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.761756 (-0.104042 0.104031)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.96 using 59 PHA bins.
# Reduced chi-squared = 1.350 for 57 degrees of freedom
# Null hypothesis probability = 4.020823e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.213e-07 6.858e-08
25- 50 2.334e-07 1.310e-07
50-150 5.119e-07 2.868e-07
15-150 8.666e-07 4.854e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.05945 (-5.05945 -5.05945)
R1^2/D10^2 : 0.217308 (-0.217308 2.75357)
kT2 [keV] : 27.2409 (-4.86958 170.334)
R2^2/D10^2 : 3.48155E-03 (-0.00348155 0.00280154)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.41 using 59 PHA bins.
# Reduced chi-squared = 0.8619 for 55 degrees of freedom
# Null hypothesis probability = 7.567665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.285e-08 3.244e-08
25- 50 1.859e-07 6.496e-08
50-150 8.774e-07 2.925e-07
15-150 1.126e-06 3.726e-07
Peak spectrum fit
Power-law model
Time interval is from 10.908 sec. to 11.908 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.14106 ( 1.07839 1.07839 )
Norm@50keV : 3.89289E-04 ( -0.000397094 0.00183929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.53 using 59 PHA bins.
# Reduced chi-squared = 0.6234 for 57 degrees of freedom
# Null hypothesis probability = 9.885183e-01
Photon flux (15-150 keV) in 1 sec: 9.60746E-02 ( -0.0960581 0.167362 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57617e-08 ( -1.57617e-08 1.99717e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.908 sec. to 11.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.83269 ( 1.87925 1.87925 )
Epeak [keV] : 587.899 ( -531.502 -531.502 )
Norm@50keV : 4.97150E-04 ( -0.000522882 0.525715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.52 using 59 PHA bins.
# Reduced chi-squared = 0.6343 for 56 degrees of freedom
# Null hypothesis probability = 9.851566e-01
Photon flux (15-150 keV) in 1 sec: 9.86939E-02 ( -0.0986939 0.16387 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62082e-08 ( -1.62082e-08 2.12847e-08 ) ergs/cm2
Band function
Time interval is from 10.908 sec. to 11.908 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.191460 ( -0.159905 -0.159905 )
beta : 1.12298 ( -1.11873 -1.11873 )
Epeak [keV] : 14.3916 ( -14.5674 -14.5674 )
Norm@50keV : 8.37513E-04 ( -0.000840528 208.404 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.53 using 59 PHA bins.
# Reduced chi-squared = 0.6461 for 55 degrees of freedom
# Null hypothesis probability = 9.807625e-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] : 2.32506 (-5 -5)
R^2/D10^2 : 6.44310 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.47 using 59 PHA bins.
# Reduced chi-squared = 0.6574 for 57 degrees of freedom
# Null hypothesis probability = 9.787510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.311 ( )
Norm : 0.185047 (-0.266737 0.820699)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.23 using 59 PHA bins.
# Reduced chi-squared = 0.6532 for 57 degrees of freedom
# Null hypothesis probability = 9.802410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.482e-10 0.000e+00
25- 50 1.663e-11 0.000e+00
50-150 2.016e-14 0.000e+00
15-150 2.648e-10 0.000e+00
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.20328 (-2.20302 -2.20302)
R1^2/D10^2 : 11.3766 (-11.3777 -11.3777)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 5.96944E-05 (-5.98585e-05 -5.98585e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.54 using 59 PHA bins.
# Reduced chi-squared = 0.6461 for 55 degrees of freedom
# Null hypothesis probability = 9.807377e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.131e-10 3.127e-11
25- 50 6.593e-10 1.481e-10
50-150 1.581e-08 3.221e-09
15-150 1.678e-08 4.571e-09
Plot creation:
Thu Oct 24 22:16:39 EDT 2013