batgrbproduct Analysis for Trigger=665268
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 Nov 28 04:03:36 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger665268/GCN5_download_cron
======================================================================
Trigger: 00665268 Segment: 000
BAT Trigger Time: 470308145.28 [s; MET]
Trigger Stop: 470308145.536 [s; MET]
UTC: 2015-11-27T09:08:49.807240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 19.7778363516866 Dec: -82.773849221241 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.86
Image Trigger?: NO
Rate S/N Ratio: 12.5299640861417 [ if not an image trigger ]
Image S/N Ratio: 6.86
Flight Position: [ source = BAT ]
RA: 19.7778363516866 Dec: -82.773849221241 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 19.6618507665897 Dec: -82.7612211712065 [deg; J2000]
{ 01h 18m 38.8s , -82d 45' 40.4" }
+/- 2.79524268928748 [arcmin] (estimated 90% radius based on SNR)
+/- 1.34911191178279 [arcmin] (formal 1-sigma fit error)
SNR: 7.00448497674242
Angular difference between Flight and Ground position is 1.158306 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 0.187999904155731 +/- 0.042520585314364
Measured from: 0.0240001678466797
to: 0.212000072002411 [s; relative to TRIGTIME]
T50: 0.0959999561309814 +/- 0.042520585314364
Measured from: 0.0760001540184021
to: 0.172000110149384 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.379999995231628
to: 0.620000004768372 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0160000324249268
to: 0.220000028610229 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.006516 0.014940 0.016307 0.002626
0.002753 0.003118 0.003043 0.002395 [error]
Peak 0.006884 0.025712 0.015422 0.001150
0.005878 0.006076 0.005503 0.004808 [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 2.37e-09 5.05e-09 8.43e-09 3.20e-08 2.32e-08 4.79e-08 erg/cm2
Error 9.28e-10 1.32e-09 2.16e-09 1.63e-08 5.63e-09 1.79e-08 erg/cm2
Peak flux Power-law 8.80e-02 1.18e-01 1.16e-01 2.04e-01 3.88e-01 5.26e-01 ph/cm2/s
Error 6.12e-02 5.12e-02 4.27e-02 1.75e-01 1.37e-01 1.97e-01 ph/cm2/s
Fluence Cutoff-PL 1.78e-09 5.88e-09 1.02e-08 8.57e-09 2.31e-08 2.64e-08 erg/cm2
Error 1.06e-09 1.68e-09 2.93e-09 1.46e-08 5.73e-09 1.39e-08 erg/cm2
Peak flux Cutoff-PL 8.65e-02 1.20e-01 1.17e-01 1.56e-01 3.87e-01 4.70e-01 ph/cm2/s
Error 6.27e-02 5.04e-02 4.68e-02 1.72e-01 1.38e-01 2.30e-01 ph/cm2/s
Fluence Band 1.79e-09 5.84e-09 1.01e-08 8.89e-09 2.32e-08 2.73e-08 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 1.261 0.333 - - 1.14e-02 2.66e-03 47.180 57
CPL -0.194 1.628 84.0 149.0 5.52e-02 1.66e-01 43.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.025 0.634 - - 3.37e-03 1.17e-03 54.240 57
CPL 0.926 2.822 535.3 0.0 3.78e-03 5.78e+01 54.230 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 0.204 0.016 0.220
T90 0.188 0.024 0.212
T50 0.096 0.076 0.172
Peak 1.000 -0.380 0.620
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
19.6619 -82.7612 0.0274 20.0 -2.3 0.0405 7.0 TRIG_00665268
------------------------------------------
Foreground time interval of the image:
0.016 0.220 (delta_t = 0.204 [sec])
Background time interval of the image:
-203.879 0.016 (delta_t = 203.895 [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 0.016 sec. to 0.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26071 ( -0.339192 0.327437 )
Norm@50keV : 1.13927E-02 ( -0.00265839 0.00265574 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.18 using 59 PHA bins.
# Reduced chi-squared = 0.8278 for 57 degrees of freedom
# Null hypothesis probability = 8.198050e-01
Photon flux (15-150 keV) in 0.204 sec: 1.34995 ( -0.326859 0.328197 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31934e-08 ( -5.61916e-09 5.64237e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 0.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.194323 ( -1.89453 1.36217 )
Epeak [keV] : 84.0179 ( -23.3448 274.661 )
Norm@50keV : 5.52161E-02 ( -0.0552266 0.275807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7825 for 56 degrees of freedom
# Null hypothesis probability = 8.815409e-01
Photon flux (15-150 keV) in 0.204 sec: 1.34563 ( -0.32749 0.32923 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3114e-08 ( -5.71918e-09 5.73689e-09 ) ergs/cm2
Band function
Time interval is from 0.016 sec. to 0.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.200848 ( -1.51835 1.71444 )
beta : -10.0000 ( 10 8.88178e-15 )
Epeak [keV] : 83.8696 ( -21.904 159.627 )
Norm@50keV : 5.56025E-02 ( -0.0556016 0.274924 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7967 for 55 degrees of freedom
# Null hypothesis probability = 8.607209e-01
Photon flux (15-150 keV) in 0.204 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3165e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.2469 (-4.17691 5.13631)
R^2/D10^2 : 7.84794E-02 (-0.0445172 0.10038)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.13 using 59 PHA bins.
# Reduced chi-squared = 0.7917 for 57 degrees of freedom
# Null hypothesis probability = 8.721005e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.160e-09 5.247e-10
25- 50 5.631e-09 2.285e-09
50-150 1.537e-08 6.162e-09
15-150 2.216e-08 8.820e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-78.4203 -200)
Norm : 5.75038 (-1.35348 1.35348)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.24 using 59 PHA bins.
# Reduced chi-squared = 0.8463 for 57 degrees of freedom
# Null hypothesis probability = 7.890662e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.921e-09 1.777e-09
25- 50 5.619e-09 3.302e-09
50-150 1.232e-08 7.374e-09
15-150 2.087e-08 1.228e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 23.3852 (-10.6906 -23.2965)
R1^2/D10^2 : 3.37056E-02 (-0.0339817 0.0861086)
kT2 [keV] : 7.74163 (-7.61211 -7.61211)
R2^2/D10^2 : 0.596626 (-0.621889 -0.621889)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.17 using 59 PHA bins.
# Reduced chi-squared = 0.7848 for 55 degrees of freedom
# Null hypothesis probability = 8.762482e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.962e-09 1.183e-09
25- 50 5.825e-09 2.966e-09
50-150 1.561e-08 9.003e-09
15-150 2.340e-08 1.300e-08
Peak spectrum fit
Power-law model
Time interval is from -0.380 sec. to 0.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02478 ( -0.690706 0.576801 )
Norm@50keV : 3.36948E-03 ( -0.00117933 0.00115783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.24 using 59 PHA bins.
# Reduced chi-squared = 0.9516 for 57 degrees of freedom
# Null hypothesis probability = 5.793350e-01
Photon flux (15-150 keV) in 1 sec: 0.388379 ( -0.136349 0.137909 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61245e-08 ( -1.30961e-08 1.34438e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.380 sec. to 0.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926027 ( -6.27418 -0.629982 )
Epeak [keV] : 535.332 ( -468.214 -468.214 )
Norm@50keV : 3.78363E-03 ( -0.00160809 115.66 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.23 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 56 degrees of freedom
# Null hypothesis probability = 5.421384e-01
Photon flux (15-150 keV) in 1 sec: 0.386583 ( -0.136902 0.139301 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.52559e-08 ( -1.95082e-08 1.42551e-08 ) ergs/cm2
Band function
Time interval is from -0.380 sec. to 0.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95614 ( -4.95614 -4.95614 )
beta : -1.53464 ( -1.87874 0.87288 )
Epeak [keV] : 35.5077 ( -35.5077 17.657 )
Norm@50keV : 37.0814 ( -12.0171 796558 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9450 for 55 degrees of freedom
# Null hypothesis probability = 5.909453e-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] : 15.1611 (-5.33667 17.8973)
R^2/D10^2 : 4.52152E-02 (-0.0446623 0.158849)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
# Reduced chi-squared = 0.9788 for 57 degrees of freedom
# Null hypothesis probability = 5.204402e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.172e-09 1.403e-09
25- 50 8.715e-09 5.400e-09
50-150 1.370e-08 9.695e-09
15-150 2.459e-08 1.580e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-113.195 -199.363)
Norm : 1.60471 (-0.5687 0.568721)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.20 using 59 PHA bins.
# Reduced chi-squared = 0.9859 for 57 degrees of freedom
# Null hypothesis probability = 5.052410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.996e-09 2.509e-09
25- 50 7.687e-09 4.926e-09
50-150 1.686e-08 1.068e-08
15-150 2.854e-08 1.747e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6002 (-3.80744 6.04744)
R1^2/D10^2 : 0.124891 (-0.104426 0.387037)
kT2 [keV] : 199.198 (-199.29 -199.29)
R2^2/D10^2 : 7.26055E-05 (-5.13527e-05 0.0076244)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Reduced chi-squared = 0.9372 for 55 degrees of freedom
# Null hypothesis probability = 4.448184e-01
# Null hypothesis probability = 6.074357e-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
Plot creation:
Sat Nov 28 04:08:45 EST 2015