batgrbproduct Analysis for Trigger=725036
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Dec 3 18:55:50 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger725036/GCN5_download_cron
======================================================================
Trigger: 00725036 Segment: 000
BAT Trigger Time: 502413189.952 [s; MET]
Trigger Stop: 502413190.464 [s; MET]
UTC: 2016-12-02T23:12:52.703120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 356.894953923009 Dec: 19.6396627418034 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.12
Image Trigger?: NO
Rate S/N Ratio: 21.1896201004171 [ if not an image trigger ]
Image S/N Ratio: 11.12
Flight Position: [ source = BAT ]
RA: 356.894953923009 Dec: 19.6396627418034 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 356.903754602354 Dec: 19.6517457922755 [deg; J2000]
{ 23h 47m 36.9s , +19d 39' 06.3" }
+/- 0.703227445973341 [arcmin] (estimated 90% radius based on SNR)
+/- 0.205160484435899 [arcmin] (formal 1-sigma fit error)
SNR: 50.2982567989719
Angular difference between Flight and Ground position is 0.879154 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 118.547999918461 +/- 0.70360217352223
Measured from: -62.1839998960495
to: 56.3640000224113 [s; relative to TRIGTIME]
T50: 68.5559999346733 +/- 15.4675863621211
Measured from: -40.6199998855591
to: 27.9360000491142 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.10799998044968
to: 3.10799998044968 [s; relative to TRIGTIME]
Total Fluence
Measured from: -63.4120000004768
to: 65.7919999957085 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.602008 5.291632 3.824929 0.931367
0.099942 0.111655 0.105864 0.101378 [error]
Peak 0.143017 0.261598 0.254727 0.069120
0.009273 0.010999 0.010972 0.008666 [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 1.22e-06 2.18e-06 2.99e-06 8.49e-06 8.64e-06 1.49e-05 erg/cm2
Error 6.65e-08 6.77e-08 1.10e-07 7.12e-07 2.62e-07 7.77e-07 erg/cm2
Peak flux Power-law 1.54e+00 1.86e+00 1.62e+00 2.43e+00 5.87e+00 7.45e+00 ph/cm2/s
Error 1.35e-01 9.98e-02 8.61e-02 2.71e-01 2.77e-01 3.64e-01 ph/cm2/s
Fluence Cutoff-PL 1.17e-06 2.22e-06 3.03e-06 6.26e-06 8.49e-06 1.27e-05 erg/cm2
Error 8.38e-08 7.54e-08 1.18e-07 1.90e-06 3.05e-07 1.87e-06 erg/cm2
Peak flux Cutoff-PL 1.34e+00 1.93e+00 1.73e+00 1.39e+00 5.73e+00 6.39e+00 ph/cm2/s
Error 1.70e-01 1.12e-01 1.07e-01 4.18e-01 2.88e-01 5.09e-01 ph/cm2/s
Fluence Band 1.04e-06 1.96e-06 2.34e-06 4.66e-06 6.79e-06 1.00e-05 erg/cm2
Error -------- -------- 1.20e-07 -------- 2.53e-07 -------- erg/cm2
Peak flux Band 1.35e+00 1.92e+00 1.73e+00 1.47e+00 5.74e+00 6.48e+00 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 1.546 0.054 - - 7.10e-03 2.00e-04 54.130 57
CPL 1.339 0.214 166.1 2233.8 8.92e-03 2.02e-03 51.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.195 0.079 - - 5.00e-02 2.30e-03 51.140 57
CPL 0.602 0.345 130.5 60.3 9.40e-02 3.46e-02 41.230 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: 91.136000 sec.
T50 in the 50-300 keV band: 38.336000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 129.204 -63.412 65.792
T90 118.548 -62.184 56.364
T50 68.556 -40.620 27.936
Peak 1.000 2.108 3.108
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
356.9038 +19.6517 0.0038 30.8 -13.2 4.9995 50.3 TRIG_00725036
------------------------------------------
Foreground time interval of the image:
-24.951 10.849 (delta_t = 35.800 [sec])
Background time interval of the image:
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 -63.412 sec. to 65.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54575 ( -0.0542768 0.0543932 )
Norm@50keV : 7.09658E-03 ( -0.000200023 0.000199891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.13 using 59 PHA bins.
# Reduced chi-squared = 0.9496 for 57 degrees of freedom
# Null hypothesis probability = 5.834690e-01
Photon flux (15-150 keV) in 129.2 sec: 0.897283 ( -0.0269669 0.0270354 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.63688e-06 ( -2.61869e-07 2.62602e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -63.412 sec. to 65.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33855 ( -0.22022 0.20778 )
Epeak [keV] : 166.060 ( -59.6306 4408.06 )
Norm@50keV : 8.91975E-03 ( -0.00165226 0.00238621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.27 using 59 PHA bins.
# Reduced chi-squared = 0.9156 for 56 degrees of freedom
# Null hypothesis probability = 6.540605e-01
Photon flux (15-150 keV) in 129.2 sec: 0.883365 ( -0.030098 0.030182 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.48654e-06 ( -3.05558e-07 3.0384e-07 ) ergs/cm2
Band function
Time interval is from -63.412 sec. to 65.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.53387E-02 ( -1.16436 4.24607 )
beta : -1.62392 ( -0.11755 0.0798551 )
Epeak [keV] : 41.7191 ( -14.706 52.809 )
Norm@50keV : 6.46501E-02 ( -0.0645644 297.853 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.29 using 59 PHA bins.
# Reduced chi-squared = 0.8599 for 55 degrees of freedom
# Null hypothesis probability = 7.605144e-01
Photon flux (15-150 keV) in 129.2 sec: 0.751673 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.79129e-06 ( -6.79039e-06 -2.52909e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.2111 ( )
R^2/D10^2 : 9.16409E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 301.02 using 59 PHA bins.
# Reduced chi-squared = 5.2811 for 57 degrees of freedom
# Null hypothesis probability = 7.002113e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.722e-07 3.120e-08
25- 50 2.303e-06 8.721e-08
50-150 3.648e-06 2.061e-07
15-150 6.523e-06 2.196e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-19.8863 -200)
Norm : 3.63096 (-0.10113 0.10113)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.31 using 59 PHA bins.
# Reduced chi-squared = 0.9177 for 57 degrees of freedom
# Null hypothesis probability = 6.513752e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-06 3.463e-08
25- 50 2.248e-06 6.977e-08
50-150 4.930e-06 1.512e-07
15-150 8.346e-06 2.558e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.88351 (-0.743083 0.776812)
R1^2/D10^2 : 0.632358 (-0.165419 0.247206)
kT2 [keV] : 29.7839 (-3.48639 4.80383)
R2^2/D10^2 : 6.82615E-03 (-0.00269751 0.003801)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.27 using 59 PHA bins.
# Reduced chi-squared = 0.8958 for 55 degrees of freedom
# Null hypothesis probability = 6.923548e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.031e-06 1.089e-07
25- 50 2.305e-06 1.492e-07
50-150 5.139e-06 5.698e-07
15-150 8.475e-06 7.048e-07
Peak spectrum fit
Power-law model
Time interval is from 2.108 sec. to 3.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19521 ( -0.0787371 0.0785705 )
Norm@50keV : 5.00429E-02 ( -0.00229991 0.00229991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.8972 for 57 degrees of freedom
# Null hypothesis probability = 6.934088e-01
Photon flux (15-150 keV) in 1 sec: 5.87008 ( -0.277158 0.277398 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08395e-07 ( -2.59248e-08 2.60071e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.108 sec. to 3.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.602076 ( -0.358186 0.330909 )
Epeak [keV] : 130.483 ( -29.5802 91.0378 )
Norm@50keV : 9.40404E-02 ( -0.0272761 0.0419164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.23 using 59 PHA bins.
# Reduced chi-squared = 0.7363 for 56 degrees of freedom
# Null hypothesis probability = 9.301349e-01
Photon flux (15-150 keV) in 1 sec: 5.72747 ( -0.28796 0.28789 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.9364e-07 ( -2.7797e-08 2.7696e-08 ) ergs/cm2
Band function
Time interval is from 2.108 sec. to 3.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.602038 ( -0.276823 0.366099 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 130.461 ( -17.4822 90.8489 )
Norm@50keV : 9.40417E-02 ( -0.0272826 0.0419055 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.23 using 59 PHA bins.
# Reduced chi-squared = 0.7497 for 55 degrees of freedom
# Null hypothesis probability = 9.156938e-01
Photon flux (15-150 keV) in 1 sec: 5.74391 ( ) 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] : 19.0735 (-1.08479 1.1691)
R^2/D10^2 : 0.322551 (-0.0573234 0.0686315)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.13 using 59 PHA bins.
# Reduced chi-squared = 1.7566 for 57 degrees of freedom
# Null hypothesis probability = 3.650577e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.303e-08 2.015e-09
25- 50 1.111e-07 7.100e-09
50-150 2.972e-07 2.345e-08
15-150 4.313e-07 2.540e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.02639 -200)
Norm : 24.2399 (-1.13667 1.13667)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.16 using 59 PHA bins.
# Reduced chi-squared = 1.7748 for 57 degrees of freedom
# Null hypothesis probability = 2.857510e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.037e-08 3.145e-09
25- 50 1.161e-07 6.000e-09
50-150 2.547e-07 1.455e-08
15-150 4.312e-07 2.370e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.50939 (-1.88799 2.3939)
R1^2/D10^2 : 3.18566 (-1.72448 5.14858)
kT2 [keV] : 26.8415 (-3.56731 6.51196)
R2^2/D10^2 : 8.83545E-02 (-0.04868 0.0614006)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.94 using 59 PHA bins.
# Reduced chi-squared = 0.7807 for 55 degrees of freedom
# Null hypothesis probability = 8.814002e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.150e-08 1.092e-08
25- 50 1.107e-07 1.973e-08
50-150 3.395e-07 5.795e-08
15-150 4.917e-07 8.245e-08
Plot creation:
Sat Dec 3 19:05:22 EST 2016