batgrbproduct Analysis for Trigger=702473
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 Jul 2 16:01:40 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger702473/GCN5_download_cron
======================================================================
Trigger: 00702473 Segment: 000
BAT Trigger Time: 489097800 [s; MET]
Trigger Stop: 489097912 [s; MET]
UTC: 2016-07-01T20:29:43.502300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.803607932221 Dec: 35.3416226175907 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.04
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.04
Flight Position: [ source = BAT ]
RA: 299.803607932221 Dec: 35.3416226175907 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.682784669694 Dec: 35.2359151379525 [deg; J2000]
{ 19h 58m 43.9s , +35d 14' 09.3" }
+/- 0.951687347743552 [arcmin] (estimated 90% radius based on SNR)
+/- 0.291938672185896 [arcmin] (formal 1-sigma fit error)
SNR: 32.6468147464362
Angular difference between Flight and Ground position is 8.674178 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 714.51599997282 +/- 44.4827377326248
Measured from: -102.895999908447
to: 611.620000064373 [s; relative to TRIGTIME]
T50: 394.763999938965 +/- 36.7601900147343
Measured from: 33.4640001058578
to: 428.228000044823 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 132.10799998045
to: 133.10799998045 [s; relative to TRIGTIME]
Total Fluence
Measured from: -174.796000003815
to: 654.139999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.139081 4.788349 3.038431 0.605627
0.156850 0.161101 0.140528 0.123764 [error]
Peak 0.026096 0.019156 0.013188 0.011077
0.005576 0.005634 0.005024 0.004367 [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 1.17e-06 1.93e-06 2.40e-06 5.93e-06 7.17e-06 1.14e-05 erg/cm2
Error 8.72e-08 8.23e-08 1.42e-07 7.76e-07 3.28e-07 8.76e-07 erg/cm2
Peak flux Power-law 1.56e-01 1.54e-01 1.07e-01 1.16e-01 4.64e-01 5.33e-01 ph/cm2/s
Error 7.42e-02 4.38e-02 4.29e-02 1.03e-01 1.27e-01 1.54e-01 ph/cm2/s
Fluence Cutoff-PL 1.16e-06 1.94e-06 2.41e-06 5.45e-06 7.14e-06 1.09e-05 erg/cm2
Error 9.87e-08 9.07e-08 1.45e-07 1.60e-06 3.65e-07 1.66e-06 erg/cm2
Peak flux Cutoff-PL 1.57e-01 1.55e-01 1.06e-01 1.14e-01 4.64e-01 5.32e-01 ph/cm2/s
Error 7.25e-02 4.38e-02 5.34e-02 9.95e-02 1.26e-01 1.20e-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 1.684 0.081 - - 9.34e-04 4.02e-05 50.390 57
CPL 1.659 0.207 689.6 0.0 9.61e-04 0.00e+00 50.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.533 0.568 - - 3.68e-03 1.12e-03 45.860 57
CPL 2.708 1.686 222.1 0.0 9.06e-04 0.00e+00 45.220 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 828.936 -174.796 654.140
T90 714.516 -102.896 611.620
T50 394.764 33.464 428.228
Peak 1.000 132.108 133.108
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.6828 +35.2359 0.0059 14.0 121.4 8.2540 32.6 TRIG_00702473
------------------------------------------
Foreground time interval of the image:
-139.799 121.501 (delta_t = 261.300 [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
Multiple GTIs in the spectrum
tstart tstop
-174.796000 282.550000
284.000000 654.140000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68378 ( -0.080745 0.0814102 )
Norm@50keV : 9.34469E-04 ( -4.02799e-05 4.01022e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.39 using 59 PHA bins.
# Reduced chi-squared = 0.8840 for 57 degrees of freedom
# Null hypothesis probability = 7.196212e-01
Photon flux (15-150 keV) in 827.5 sec: 0.123413 ( -0.00528643 0.00530553 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16915e-06 ( -3.27032e-07 3.2892e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-174.796000 282.550000
284.000000 654.140000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65950 ( -0.310155 0.104329 )
Epeak [keV] : 689.629 ( )
Norm@50keV : 9.61288E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.37 using 59 PHA bins.
# Reduced chi-squared = 0.8995 for 56 degrees of freedom
# Null hypothesis probability = 6.869910e-01
Photon flux (15-150 keV) in 827.5 sec: 0.122940 ( -0.005646 0.005717 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.13834e-06 ( -3.73194e-07 3.57761e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-174.796000 282.550000
284.000000 654.140000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39824 ( 1.26106 1.26106 )
beta : -1.72189 ( 1.71207 0.10472 )
Epeak [keV] : 75.4094 ( -57.1333 -57.1333 )
Norm@50keV : 1.39269E-03 ( -0.00045157 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.06 using 59 PHA bins.
# Reduced chi-squared = 0.9101 for 55 degrees of freedom
# Null hypothesis probability = 6.635549e-01
Photon flux (15-150 keV) in 827.5 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] : 13.3493 ( )
R^2/D10^2 : 1.93444E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 196.69 using 59 PHA bins.
# Reduced chi-squared = 3.4507 for 57 degrees of freedom
# Null hypothesis probability = 2.959979e-17
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.046e-07 5.193e-08
25- 50 2.142e-06 1.134e-07
50-150 2.450e-06 2.292e-07
15-150 5.196e-06 2.445e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 142.604 (-25.6234 43.6678)
Norm : 0.507157 (-0.0272457 0.0274775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9548 for 57 degrees of freedom
# Null hypothesis probability = 5.722997e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.055e-06 7.572e-08
25- 50 1.961e-06 1.576e-07
50-150 3.899e-06 1.120e-06
15-150 6.916e-06 1.263e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.91833 (-0.895282 0.941985)
R1^2/D10^2 : 0.149969 (-0.0534262 0.0972083)
kT2 [keV] : 27.1333 (-4.09834 6.15127)
R2^2/D10^2 : 1.19896E-03 (-0.000602347 0.000976767)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.80 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 55 degrees of freedom
# Null hypothesis probability = 5.203722e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-06 1.461e-07
25- 50 1.978e-06 2.135e-07
50-150 4.047e-06 6.856e-07
15-150 7.088e-06 9.268e-07
Peak spectrum fit
Power-law model
Time interval is from 132.108 sec. to 133.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53293 ( -0.56107 0.575717 )
Norm@50keV : 3.67985E-03 ( -0.00115385 0.00107891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.86 using 59 PHA bins.
# Reduced chi-squared = 0.8046 for 57 degrees of freedom
# Null hypothesis probability = 8.546400e-01
Photon flux (15-150 keV) in 1 sec: 0.463582 ( -0.126454 0.126552 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47291e-08 ( -1.15e-08 1.2093e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 132.108 sec. to 133.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70821 ( -2.0311 1.34096 )
Epeak [keV] : 222.098 ( )
Norm@50keV : 9.05875E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.22 using 59 PHA bins.
# Reduced chi-squared = 0.8075 for 56 degrees of freedom
# Null hypothesis probability = 8.480412e-01
Photon flux (15-150 keV) in 1 sec: 0.463598 ( -0.125996 0.126296 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44181e-08 ( -1.11898e-08 1.18461e-08 ) ergs/cm2
Band function
Time interval is from 132.108 sec. to 133.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99121 ( -4.99121 -4.99121 )
beta : -1.63833 ( -0.818393 0.616385 )
Epeak [keV] : 22.3244 ( -22.3244 60.3062 )
Norm@50keV : 833.887 ( -225.068 3.50757e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.42 using 59 PHA bins.
# Reduced chi-squared = 0.8258 for 55 degrees of freedom
# Null hypothesis probability = 8.180574e-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] : 9.31439 (-3.21341 12.8638)
R^2/D10^2 : 0.263049 (-0.257889 1.05277)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.40 using 59 PHA bins.
# Reduced chi-squared = 0.9368 for 57 degrees of freedom
# Null hypothesis probability = 6.109048e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.518e-09 2.811e-09
25- 50 1.012e-08 6.015e-09
50-150 4.286e-09 3.277e-09
15-150 1.893e-08 1.176e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.87016 (-0.512656 0.512714)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.55 using 59 PHA bins.
# Reduced chi-squared = 0.8167 for 57 degrees of freedom
# Null hypothesis probability = 8.370645e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.657e-09 2.813e-09
25- 50 8.958e-09 5.520e-09
50-150 1.965e-08 1.180e-08
15-150 3.326e-08 1.976e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23282 (-2.22351 2.76341)
R1^2/D10^2 : 1.02086 (-0.820801 5.26903)
kT2 [keV] : 57.4174 (-34.5173 -57.4172)
R2^2/D10^2 : 7.89067E-04 (-0.000736395 0.00857894)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.99 using 59 PHA bins.
# Reduced chi-squared = 0.7817 for 55 degrees of freedom
# Null hypothesis probability = 8.801857e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.809e-09 3.446e-09
25- 50 7.905e-09 4.418e-09
50-150 2.688e-08 1.513e-08
15-150 4.059e-08 2.005e-08
Plot creation:
Sat Jul 2 16:12:34 EDT 2016