batgrbproduct Analysis for Trigger=666378
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): Mon Dec 7 20:58:47 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger666378/GCN5_download_cron
======================================================================
Trigger: 00666378 Segment: 000
BAT Trigger Time: 471044610.048 [s; MET]
Trigger Stop: 471044611.456 [s; MET]
UTC: 2015-12-05T21:43:14.535740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 41.1585655544286 Dec: -43.4806088350113 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.42
Image Trigger?: NO
Rate S/N Ratio: 11.4017542509914 [ if not an image trigger ]
Image S/N Ratio: 7.42
Flight Position: [ source = BAT ]
RA: 41.1585655544286 Dec: -43.4806088350113 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.1924399080358 Dec: -43.4629650554462 [deg; J2000]
{ 02h 44m 46.2s , -43d 27' 46.7" }
+/- 2.36624239715865 [arcmin] (estimated 90% radius based on SNR)
+/- 1.33574883291157 [arcmin] (formal 1-sigma fit error)
SNR: 8.88685407919854
Angular difference between Flight and Ground position is 1.815563 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 1.43599992990494 +/- 0.237587854202095
Measured from: -0.19599986076355
to: 1.24000006914139 [s; relative to TRIGTIME]
T50: 0.851999938488007 +/- 0.305470116322775
Measured from: 0.120000123977661
to: 0.972000062465668 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.112000048160553
to: 1.11200004816055 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.219999969005585
to: 1.31600004434586 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.047054 0.042538 0.044091 0.006090
0.007722 0.008160 0.007472 0.006784 [error]
Peak 0.037781 0.022825 0.025411 0.006257
0.006295 0.006616 0.006051 0.005477 [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 1.21e-08 2.09e-08 2.76e-08 7.44e-08 8.06e-08 1.35e-07 erg/cm2
Error 3.22e-09 3.61e-09 7.21e-09 4.07e-08 1.70e-08 4.73e-08 erg/cm2
Peak flux Power-law 2.90e-01 2.44e-01 1.39e-01 1.18e-01 7.25e-01 7.92e-01 ph/cm2/s
Error 9.43e-02 5.21e-02 5.21e-02 8.92e-02 1.55e-01 1.79e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-08 2.14e-08 2.78e-08 5.22e-08 7.91e-08 1.13e-07 erg/cm2
Error 3.54e-09 4.35e-09 7.52e-09 6.88e-08 1.85e-08 5.99e-08 erg/cm2
Peak flux Cutoff-PL 2.99e-01 2.43e-01 1.33e-01 1.07e-01 7.24e-01 7.89e-01 ph/cm2/s
Error 9.49e-02 3.94e-02 -------- 1.14e-01 1.55e-01 1.75e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.597 0.314 - - 5.61e-03 1.08e-03 50.930 57
CPL 1.397 0.877 139.7 0.0 7.20e-03 1.62e-02 50.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.807 0.449 - - 5.25e-03 1.46e-03 51.090 57
CPL 2.083 0.593 34.3 -0.0 3.71e-03 5.64e-03 50.760 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 1.536 -0.220 1.316
T90 1.436 -0.196 1.240
T50 0.852 0.120 0.972
Peak 1.000 0.112 1.112
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
41.1924 -43.4630 0.0217 21.8 -24.9 0.1346 8.9 TRIG_00666378
------------------------------------------
Foreground time interval of the image:
-0.220 1.316 (delta_t = 1.536 [sec])
Background time interval of the image:
-239.048 -0.220 (delta_t = 238.828 [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 -0.220 sec. to 1.316 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59686 ( -0.307362 0.321587 )
Norm@50keV : 5.61116E-03 ( -0.00109701 0.00106564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.93 using 59 PHA bins.
# Reduced chi-squared = 0.8936 for 57 degrees of freedom
# Null hypothesis probability = 7.007950e-01
Photon flux (15-150 keV) in 1.536 sec: 0.720359 ( -0.124227 0.124258 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.06374e-08 ( -1.67839e-08 1.73053e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.220 sec. to 1.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39651 ( -1.24131 0.512286 )
Epeak [keV] : 139.744 ( -139.738 -139.738 )
Norm@50keV : 7.20259E-03 ( -0.0072027 0.0252297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 56 degrees of freedom
# Null hypothesis probability = 6.704853e-01
Photon flux (15-150 keV) in 1.536 sec: 0.714682 ( -0.126903 0.127094 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.90972e-08 ( -1.84669e-08 1.84845e-08 ) ergs/cm2
Band function
Time interval is from -0.220 sec. to 1.316 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98629 ( -4.98629 -4.98629 )
beta : -1.70346 ( -0.418342 0.347034 )
Epeak [keV] : 22.6766 ( -22.6766 6.03356 )
Norm@50keV : 1204.42 ( -205.906 3.86808e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.64 using 59 PHA bins.
# Reduced chi-squared = 0.9025 for 55 degrees of freedom
# Null hypothesis probability = 6.789587e-01
Photon flux (15-150 keV) in 1.536 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] : 13.8125 (-3.22238 4.02209)
R^2/D10^2 : 0.106135 (-0.0620151 0.1632)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.346612e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.578e-09 2.319e-09
25- 50 2.414e-08 6.479e-09
50-150 3.011e-08 1.279e-08
15-150 6.082e-08 1.871e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 171.245 (-94.0923 -170.548)
Norm : 2.94879 (-0.524304 0.666487)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.8925 for 57 degrees of freedom
# Null hypothesis probability = 7.028490e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.149e-08 6.509e-09
25- 50 2.168e-08 1.207e-08
50-150 4.508e-08 2.618e-08
15-150 7.825e-08 4.409e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.00064 (-1.61837 2.50478)
R1^2/D10^2 : 2.80724 (-2.19373 7.04677)
kT2 [keV] : 22.0080 (-6.12623 9.05576)
R2^2/D10^2 : 1.73840E-02 (-0.0137799 0.0391497)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.79 using 59 PHA bins.
# Reduced chi-squared = 0.8871 for 55 degrees of freedom
# Null hypothesis probability = 7.093757e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.288e-08 7.377e-09
25- 50 1.951e-08 1.021e-08
50-150 4.608e-08 2.784e-08
15-150 7.848e-08 4.368e-08
Peak spectrum fit
Power-law model
Time interval is from 0.112 sec. to 1.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80700 ( -0.426537 0.470537 )
Norm@50keV : 5.24910E-03 ( -0.00150828 0.00140203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.8963 for 57 degrees of freedom
# Null hypothesis probability = 6.953636e-01
Photon flux (15-150 keV) in 1 sec: 0.725287 ( -0.154918 0.154921 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83116e-08 ( -1.33337e-08 1.40779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.112 sec. to 1.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08321 ( -0.709347 0.476929 )
Epeak [keV] : 34.3475 ( -9999.35 -9999.36 )
Norm@50keV : 3.70631E-03 ( -0.000789933 0.010488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.76 using 59 PHA bins.
# Reduced chi-squared = 0.9065 for 56 degrees of freedom
# Null hypothesis probability = 6.727562e-01
Photon flux (15-150 keV) in 1 sec: 0.724198 ( -0.154746 0.154972 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83817e-08 ( -1.3414e-08 1.36684e-08 ) ergs/cm2
Band function
Time interval is from 0.112 sec. to 1.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96831 ( -4.96831 -4.96831 )
beta : -1.91215 ( -0.627007 0.477867 )
Epeak [keV] : 20.5129 ( -20.5129 66.8163 )
Norm@50keV : 2537.70 ( -538.957 6.78826e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.43 using 59 PHA bins.
# Reduced chi-squared = 0.9168 for 55 degrees of freedom
# Null hypothesis probability = 6.498118e-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] : 8.00969 (-2.63596 6.4274)
R^2/D10^2 : 0.726086 (-0.616147 2.76164)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.79 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 57 degrees of freedom
# Null hypothesis probability = 2.785246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.431e-09 4.255e-09
25- 50 1.479e-08 8.650e-09
50-150 3.898e-09 2.625e-09
15-150 2.712e-08 1.392e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8982 (-57.2367 -99.9324)
Norm : 3.17161 (-0.852795 1.33102)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.58 using 59 PHA bins.
# Reduced chi-squared = 0.9224 for 57 degrees of freedom
# Null hypothesis probability = 6.416002e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.290e-09 3.311e-09
25- 50 1.433e-08 8.050e-09
50-150 2.321e-08 1.790e-08
15-150 4.583e-08 3.060e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.91586 (-1.40687 2.05581)
R1^2/D10^2 : 4.26524 (-3.24494 12.0001)
kT2 [keV] : 30.7645 (-13.5227 117.123)
R2^2/D10^2 : 5.35662E-03 (-0.00516564 0.0292889)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.23 using 59 PHA bins.
# Reduced chi-squared = 0.8769 for 55 degrees of freedom
# Null hypothesis probability = 7.290660e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-08 6.060e-09
25- 50 1.093e-08 5.935e-09
50-150 3.243e-08 1.919e-08
15-150 5.383e-08 2.925e-08
Plot creation:
Mon Dec 7 21:04:06 EST 2015