batgrbproduct Analysis for Trigger=646603
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): Sat Jun 27 10:09:54 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger646603/GCN5_download_cron
======================================================================
Trigger: 00646603 Segment: 000
BAT Trigger Time: 456977583.296 [s; MET]
Trigger Stop: 456977584.32 [s; MET]
UTC: 2015-06-26T02:12:49.527100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 111.341156726315 Dec: -37.7641175175662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.71
Image Trigger?: NO
Rate S/N Ratio: 11.8743420870379 [ if not an image trigger ]
Image S/N Ratio: 8.71
Flight Position: [ source = BAT ]
RA: 111.341156726315 Dec: -37.7641175175662 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 111.353336583123 Dec: -37.8030088424704 [deg; J2000]
{ 07h 25m 24.8s , -37d 48' 10.8" }
+/- 1.87541796041825 [arcmin] (estimated 90% radius based on SNR)
+/- 0.644924943507137 [arcmin] (formal 1-sigma fit error)
SNR: 12.3873462980649
Angular difference between Flight and Ground position is 2.403895 arcmin
Partial Coding Fraction: 0.3789062 [ including projection effects ]
Duration
T90: 144 +/- 65.9696900098826
Measured from: -47.2959998846054
to: 96.7040001153946 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -15.2959998846054
to: 16.7040001153946 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.2039999961853
to: 9.2039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -47.2960000038147
to: 144.703999996185 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.148527 1.084697 0.700532 0.088038
0.093193 0.096268 0.083646 0.073431 [error]
Peak 0.021707 0.008860 0.009746 0.008544
0.008849 0.009100 0.007826 0.006820 [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 4.29e-07 5.44e-07 5.02e-07 8.13e-07 1.75e-06 2.29e-06 erg/cm2
Error 5.81e-08 5.07e-08 8.41e-08 2.70e-07 1.91e-07 3.62e-07 erg/cm2
Peak flux Power-law 2.49e-01 1.26e-01 3.92e-02 1.55e-02 4.23e-01 4.31e-01 ph/cm2/s
Error 2.12e-01 1.08e-01 6.26e-02 1.03e-01 3.34e-01 3.44e-01 ph/cm2/s
Fluence Cutoff-PL 4.30e-07 5.44e-07 5.02e-07 8.03e-07 1.75e-06 2.28e-06 erg/cm2
Error 5.81e-08 5.63e-08 8.41e-08 1.56e-07 2.01e-07 4.88e-07 erg/cm2
Peak flux Cutoff-PL 2.61e-01 1.17e-01 3.12e-02 1.04e-02 4.16e-01 4.19e-01 ph/cm2/s
Error 2.12e-01 9.80e-02 6.28e-02 1.03e-01 2.42e-01 2.46e-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 2.114 0.186 - - 9.80e-04 1.18e-04 51.790 57
CPL 2.144 0.000 195.8 0.0 9.43e-04 6.45e-04 51.780 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.673 2.408 - - 1.93e-03 2.20e-03 52.830 57
CPL 2.041 0.136 21.6 0.0 2.54e-03 0.00e+00 53.170 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: 60.992000 sec.
T50 in the 50-300 keV band: 19.584000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 192.000 -47.296 144.704
T90 144.000 -47.296 96.704
T50 32.000 -15.296 16.704
Peak 1.000 8.204 9.204
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
111.3533 -37.8030 0.0155 43.8 -28.5 1.9861 12.4 TRIG_00646603
------------------------------------------
Foreground time interval of the image:
-47.296 15.205 (delta_t = 62.501 [sec])
Background time interval of the image:
-239.296 -47.296 (delta_t = 192.000 [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 -47.296 sec. to 144.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11420 ( -0.180687 0.190637 )
Norm@50keV : 9.80228E-04 ( -0.000119334 0.000116237 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9086 for 57 degrees of freedom
# Null hypothesis probability = 6.703349e-01
Photon flux (15-150 keV) in 192 sec: 0.155305 ( -0.0145485 0.014565 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7511e-06 ( -1.89191e-07 1.91989e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -47.296 sec. to 144.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14385 ( )
Epeak [keV] : 195.826 ( )
Norm@50keV : 9.42778E-04 ( -0.000482178 0.000808384 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.78 using 59 PHA bins.
# Reduced chi-squared = 0.9247 for 56 degrees of freedom
# Null hypothesis probability = 6.351031e-01
Photon flux (15-150 keV) in 192 sec: 0.155331 ( -0.014621 0.01448 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75036e-06 ( -2.11062e-07 1.91336e-07 ) ergs/cm2
Band function
Time interval is from -47.296 sec. to 144.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.79399 ( -4.79399 -4.79399 )
beta : -2.17317 ( -0.220915 0.200263 )
Epeak [keV] : 19.7679 ( -19.7679 3.85355 )
Norm@50keV : 559.185 ( -51.6369 1.65333e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.22 using 59 PHA bins.
# Reduced chi-squared = 0.9312 for 55 degrees of freedom
# Null hypothesis probability = 6.199166e-01
Photon flux (15-150 keV) in 192 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] : 9.17002 (-1.23898 1.45892)
R^2/D10^2 : 9.49819E-02 (-0.0412943 0.0737585)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.14 using 59 PHA bins.
# Reduced chi-squared = 1.599 for 57 degrees of freedom
# Null hypothesis probability = 2.737299e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.014e-07 5.030e-08
25- 50 6.594e-07 8.506e-08
50-150 2.663e-07 7.607e-08
15-150 1.227e-06 1.592e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.4065 (-14.9867 22.7749)
Norm : 0.803989 (-0.128689 0.151907)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 0.9732 for 57 degrees of freedom
# Null hypothesis probability = 5.325245e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.873e-07 5.587e-08
25- 50 5.877e-07 6.106e-08
50-150 6.632e-07 1.601e-07
15-150 1.638e-06 1.837e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.08250 (-0.944762 1.0805)
R1^2/D10^2 : 0.779145 (-0.421392 1.10464)
kT2 [keV] : 19.8924 (-4.2282 7.10759)
R2^2/D10^2 : 3.51015E-03 (-0.00240137 0.00558055)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.79 using 59 PHA bins.
# Reduced chi-squared = 0.9053 for 55 degrees of freedom
# Null hypothesis probability = 6.733237e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.398e-07 1.685e-07
25- 50 5.197e-07 1.447e-07
50-150 7.612e-07 4.137e-07
15-150 1.721e-06 5.813e-07
Peak spectrum fit
Power-law model
Time interval is from 8.204 sec. to 9.204 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67296 ( -1.87131 2.94374 )
Norm@50keV : 1.93270E-03 ( -0.00191828 0.00248412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9269 for 57 degrees of freedom
# Null hypothesis probability = 6.320607e-01
Photon flux (15-150 keV) in 1 sec: 0.423397 ( -0.423379 0.243915 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.02762e-08 ( -1.43112e-08 2.05222e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.204 sec. to 9.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04128 ( -0.24431 0.0275741 )
Epeak [keV] : 21.5933 ( )
Norm@50keV : 2.53806E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9495 for 56 degrees of freedom
# Null hypothesis probability = 5.826442e-01
Photon flux (15-150 keV) in 1 sec: 0.415856 ( -0.240954 0.243968 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10414e-08 ( -1.62843e-08 1.97101e-08 ) ergs/cm2
Band function
Time interval is from 8.204 sec. to 9.204 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.37187 ( 1.6287 1.6287 )
beta : -3.14803 ( 2.67069 1.84132 )
Epeak [keV] : 17.0033 ( -8.22193 -8.22193 )
Norm@50keV : 2562.39 ( -2562.26 3.87001e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.65 using 59 PHA bins.
# Reduced chi-squared = 0.9574 for 55 degrees of freedom
# Null hypothesis probability = 5.647599e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08598e-07 ( -1.08591e-07 -2.04736e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.88319 (-1.8099 5.77273)
R^2/D10^2 : 11.3129 (-11.3603 464.69)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9381 for 57 degrees of freedom
# Null hypothesis probability = 6.081939e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.897e-09 5.730e-09
25- 50 2.949e-09 1.894e-09
50-150 2.989e-11 3.729e-11
15-150 1.188e-08 7.825e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5797 (-13.5799 -13.5799)
Norm : 7.74542 (-4.51537 4.88689)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.37 using 59 PHA bins.
# Reduced chi-squared = 0.9363 for 57 degrees of freedom
# Null hypothesis probability = 6.119856e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.259e-09 1.714e-08
25- 50 5.120e-09 2.101e-08
50-150 7.386e-10 1.357e-08
15-150 1.412e-08 5.690e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.73278 (-1.67177 3.13449)
R1^2/D10^2 : 13.4620 (-13.3072 655.163)
kT2 [keV] : 199.363 (-174.726 -199.363)
R2^2/D10^2 : 7.54194E-05 (-6.14112e-05 0.000648082)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.12 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 55 degrees of freedom
# Null hypothesis probability = 6.975426e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.767e-09 5.675e-09
25- 50 3.378e-09 2.069e-09
50-150 1.999e-08 8.285e-09
15-150 3.213e-08 9.735e-09
Plot creation:
Sat Jun 27 10:14:05 EDT 2015