batgrbproduct analysis for trigger=736407
batgrbproduct Analysis for Trigger=736407
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): Fri Feb 3 18:24:49 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger736407/GCN5_download_cron
======================================================================
Trigger: 00736407 Segment: 000
BAT Trigger Time: 507752900.928 [s; MET]
Trigger Stop: 507752901.952 [s; MET]
UTC: 2017-02-02T18:28:02.373380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 152.528682988566 Dec: 5.0016939758479 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.32
Image Trigger?: NO
Rate S/N Ratio: 12.2065556157337 [ if not an image trigger ]
Image S/N Ratio: 7.32
Flight Position: [ source = BAT ]
RA: 152.528682988566 Dec: 5.0016939758479 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 152.526374563796 Dec: 5.02103220370847 [deg; J2000]
{ 10h 10m 06.3s , +05d 01' 15.7" }
+/- 1.01115024489999 [arcmin] (estimated 90% radius based on SNR)
+/- 0.296853353633215 [arcmin] (formal 1-sigma fit error)
SNR: 29.9391055153589
Angular difference between Flight and Ground position is 1.168469 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 46.2279999256134 +/- 11.4483053739976
Measured from: 1.58000016212463
to: 47.808000087738 [s; relative to TRIGTIME]
T50: 14.9439999461174 +/- 1.14131152001114
Measured from: 7.64000016450882
to: 22.5840001106262 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 16.0440000295639
to: 17.0440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.252000033855438
to: 76.4560000300407 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.615548 2.237767 1.371787 0.365367
0.060704 0.063859 0.054866 0.044870 [error]
Peak 0.105199 0.244933 0.192910 0.061181
0.010111 0.012305 0.011516 0.008271 [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 5.45e-07 8.97e-07 1.12e-06 2.77e-06 3.34e-06 5.33e-06 erg/cm2
Error 3.52e-08 3.43e-08 5.53e-08 2.97e-07 1.31e-07 3.37e-07 erg/cm2
Peak flux Power-law 1.26e+00 1.51e+00 1.30e+00 1.91e+00 4.74e+00 5.98e+00 ph/cm2/s
Error 1.35e-01 1.01e-01 8.99e-02 2.69e-01 2.87e-01 3.78e-01 ph/cm2/s
Fluence Cutoff-PL 5.20e-07 9.20e-07 1.13e-06 1.83e-06 3.26e-06 4.40e-06 erg/cm2
Error 4.19e-08 4.09e-08 5.83e-08 7.31e-07 1.51e-07 5.76e-07 erg/cm2
Peak flux Cutoff-PL 1.09e+00 1.61e+00 1.40e+00 9.35e-01 4.64e+00 5.04e+00 ph/cm2/s
Error 1.61e-01 1.21e-01 1.09e-01 3.72e-01 2.94e-01 4.61e-01 ph/cm2/s
Fluence Band 4.83e-07 9.44e-07 1.10e-06 2.45e-06 3.25e-06 4.98e-06 erg/cm2
Error 4.88e-08 4.56e-08 5.75e-08 3.31e-07 1.38e-07 3.72e-07 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 1.680 0.067 - - 4.73e-03 1.76e-04 67.100 57
CPL 1.409 0.268 106.8 348.7 6.49e-03 2.04e-03 63.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.214 0.097 - - 4.03e-02 2.40e-03 79.690 57
CPL 0.486 0.437 109.7 48.9 9.12e-02 4.66e-02 69.910 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: 42.112000 sec.
T50 in the 50-300 keV band: 14.336000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 76.204 0.252 76.456
T90 46.228 1.580 47.808
T50 14.944 7.640 22.584
Peak 1.000 16.044 17.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
152.5264 +5.0210 0.0065 26.5 80.1 1.8122 29.9 TRIG_00736407
------------------------------------------
Foreground time interval of the image:
0.252 12.973 (delta_t = 12.721 [sec])
Background time interval of the image:
-233.727 -42.958 (delta_t = 190.769 [sec])
-41.928 0.252 (delta_t = 42.180 [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 0.252 sec. to 76.456 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68045 ( -0.0669764 0.0672666 )
Norm@50keV : 4.72588E-03 ( -0.000176632 0.000176229 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.10 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.693416e-01
Photon flux (15-150 keV) in 76.2 sec: 0.623423 ( -0.0239422 0.023994 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.33963e-06 ( -1.3086e-07 1.31267e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.252 sec. to 76.456 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40893 ( -0.276746 0.25881 )
Epeak [keV] : 106.840 ( -31.2589 666.124 )
Norm@50keV : 6.49375E-03 ( -0.00165686 0.00242241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.88 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 56 degrees of freedom
# Null hypothesis probability = 2.193287e-01
Photon flux (15-150 keV) in 76.2 sec: 0.613116 ( -0.025744 0.025773 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26264e-06 ( -1.51463e-07 1.50564e-07 ) ergs/cm2
Band function
Time interval is from 0.252 sec. to 76.456 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.37702 ( -3.79937 -3.09273 )
beta : -1.78683 ( -0.0965721 0.0884958 )
Epeak [keV] : 28.7543 ( -3.56628 20.8626 )
Norm@50keV : 3.82019 ( -3.82017 158.046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.600338e-01
Photon flux (15-150 keV) in 76.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25417e-06 ( -3.25363e-06 -1.38143e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3861 ( )
R^2/D10^2 : 9.88379E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 225.49 using 59 PHA bins.
# Reduced chi-squared = 3.9559 for 57 degrees of freedom
# Null hypothesis probability = 6.754892e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.860e-07 1.996e-08
25- 50 1.016e-06 4.572e-08
50-150 1.170e-06 8.763e-08
15-150 2.472e-06 9.830e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 141.301 (-21.7674 32.0477)
Norm : 2.57489 (-0.12295 0.126747)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.15 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 57 degrees of freedom
# Null hypothesis probability = 2.403109e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.954e-07 3.040e-08
25- 50 9.176e-07 6.248e-08
50-150 1.807e-06 4.972e-07
15-150 3.221e-06 5.098e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.86988 (-0.847406 0.875377)
R1^2/D10^2 : 0.499944 (-0.144713 0.228563)
kT2 [keV] : 30.2246 (-4.97296 7.86587)
R2^2/D10^2 : 3.85712E-03 (-0.00205571 0.00351645)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.00 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 55 degrees of freedom
# Null hypothesis probability = 3.313576e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.632e-07 4.542e-08
25- 50 9.754e-07 8.839e-08
50-150 1.843e-06 3.330e-07
15-150 3.281e-06 4.321e-07
Peak spectrum fit
Power-law model
Time interval is from 16.044 sec. to 17.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21375 ( -0.0969161 0.0966805 )
Norm@50keV : 4.03189E-02 ( -0.00240183 0.00240149 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.69 using 59 PHA bins.
# Reduced chi-squared = 1.398 for 57 degrees of freedom
# Null hypothesis probability = 2.527196e-02
Photon flux (15-150 keV) in 1 sec: 4.74197 ( -0.287243 0.287424 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07465e-07 ( -2.69916e-08 2.71264e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 16.044 sec. to 17.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.485834 ( -0.461389 0.412653 )
Epeak [keV] : 109.708 ( -24.4469 73.4348 )
Norm@50keV : 9.11502E-02 ( -0.0331092 0.0600581 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.91 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 56 degrees of freedom
# Null hypothesis probability = 1.000818e-01
Photon flux (15-150 keV) in 1 sec: 4.63871 ( -0.29394 0.29369 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.91232e-07 ( -2.9668e-08 2.9392e-08 ) ergs/cm2
Band function
Time interval is from 16.044 sec. to 17.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.31464 ( -1.1739 -0.789325 )
beta : -1.53060 ( -0.34771 0.208946 )
Epeak [keV] : 49.2266 ( -18.2118 39.676 )
Norm@50keV : 1.26202 ( -1.24255 239.762 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.15 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.643442e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.86399e-07 ( -3.86392e-07 -2.8191e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.3619 (-1.2645 1.40055)
R^2/D10^2 : 0.357427 (-0.0817762 0.103131)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.78 using 59 PHA bins.
# Reduced chi-squared = 1.8206 for 57 degrees of freedom
# Null hypothesis probability = 1.520250e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.181e-08 2.370e-09
25- 50 9.813e-08 8.205e-09
50-150 2.126e-07 2.290e-08
15-150 3.325e-07 2.470e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-11.3731 -200)
Norm : 19.4936 (-1.18024 1.18024)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 105.48 using 59 PHA bins.
# Reduced chi-squared = 1.8506 for 57 degrees of freedom
# Null hypothesis probability = 9.984934e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.853e-08 3.435e-09
25- 50 9.336e-08 8.175e-09
50-150 2.048e-07 3.915e-08
15-150 3.466e-07 5.320e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.8364 (-2.14696 2.20173)
R1^2/D10^2 : 1.13857 (-0.417617 0.820066)
kT2 [keV] : 39.0870 (-11.6342 42.5741)
R2^2/D10^2 : 1.67531E-02 (-0.0139341 0.0382327)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.88 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.701908e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.121e-08 7.480e-09
25- 50 9.997e-08 2.235e-08
50-150 2.619e-07 1.049e-07
15-150 3.931e-07 1.317e-07
Plot creation:
Fri Feb 3 18:40:25 EST 2017