batgrbproduct analysis for trigger=737463
batgrbproduct Analysis for Trigger=737463
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): Thu Feb 9 19:55:39 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger737463/GCN5_download_cron
======================================================================
Trigger: 00737463 Segment: 000
BAT Trigger Time: 508286037.504 [s; MET]
Trigger Stop: 508286038.528 [s; MET]
UTC: 2017-02-08T22:33:38.918640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 127.154926883595 Dec: -9.02663175947905 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.42
Image Trigger?: NO
Rate S/N Ratio: 162.104904305823 [ if not an image trigger ]
Image S/N Ratio: 24.42
Flight Position: [ source = BAT ]
RA: 127.154926883595 Dec: -9.02663175947905 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 127.144687134107 Dec: -9.02669926466688 [deg; J2000]
{ 08h 28m 34.7s , -09d 01' 36.1" }
+/- 0.499862048224484 [arcmin] (estimated 90% radius based on SNR)
+/- 0.133816096025631 [arcmin] (formal 1-sigma fit error)
SNR: 81.9091522057021
Angular difference between Flight and Ground position is 0.606790 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 128.067999958992 +/- 5.75414143681782
Measured from: -5.53599989414215
to: 122.53200006485 [s; relative to TRIGTIME]
T50: 7.69199997186661 +/- 0.474383773079266
Measured from: 1.28400009870529
to: 8.9760000705719 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.420000016689301
to: 1.4200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -18.1999999880791
to: 159.300000011921 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.152802 4.238336 2.864798 0.618573
0.077331 0.080258 0.068556 0.056825 [error]
Peak 0.176903 0.410523 0.416177 0.103838
0.008295 0.010903 0.010974 0.006714 [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 9.68e-07 1.65e-06 2.15e-06 5.67e-06 6.33e-06 1.04e-05 erg/cm2
Error 4.79e-08 4.70e-08 7.06e-08 4.21e-07 1.70e-07 4.62e-07 erg/cm2
Peak flux Power-law 1.88e+00 2.54e+00 2.52e+00 4.51e+00 8.40e+00 1.14e+01 ph/cm2/s
Error 1.13e-01 9.49e-02 8.31e-02 3.08e-01 1.98e-01 3.81e-01 ph/cm2/s
Fluence Cutoff-PL 8.78e-07 1.70e-06 2.21e-06 3.18e-06 6.11e-06 7.97e-06 erg/cm2
Error 6.12e-08 5.26e-08 7.75e-08 8.05e-07 1.97e-07 8.26e-07 erg/cm2
Peak flux Cutoff-PL 1.52e+00 2.66e+00 2.79e+00 2.27e+00 8.21e+00 9.23e+00 ph/cm2/s
Error 1.39e-01 1.07e-01 1.11e-01 3.87e-01 2.67e-01 4.61e-01 ph/cm2/s
Fluence Band 8.39e-07 1.72e-06 2.15e-06 4.60e-06 6.11e-06 9.33e-06 erg/cm2
Error 7.29e-08 6.39e-08 9.40e-08 -------- 1.91e-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 1.620 0.049 - - 3.82e-03 9.76e-05 71.670 57
CPL 1.178 0.209 97.8 27.4 6.18e-03 1.40e-03 57.410 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.010 0.050 - - 7.29e-02 2.24e-03 112.240 57
CPL 0.188 0.231 127.8 21.4 1.69e-01 3.91e-02 68.650 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: 16.768000 sec.
T50 in the 50-300 keV band: 4.224000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 177.500 -18.200 159.300
T90 128.068 -5.536 122.532
T50 7.692 1.284 8.976
Peak 1.000 0.420 1.420
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
127.1447 -9.0267 0.0024 5.2 -88.6 8.8718 81.9 TRIG_00737463
------------------------------------------
Foreground time interval of the image:
-18.200 11.197 (delta_t = 29.397 [sec])
Background time interval of the image:
-239.504 -18.200 (delta_t = 221.304 [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 -18.200 sec. to 159.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61952 ( -0.0485444 0.0486506 )
Norm@50keV : 3.81972E-03 ( -9.76399e-05 9.75997e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.67 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.132269e-02
Photon flux (15-150 keV) in 177.5 sec: 0.493866 ( -0.0138698 0.0139137 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.32622e-06 ( -1.69495e-07 1.69781e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -18.200 sec. to 159.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17828 ( -0.214056 0.20428 )
Epeak [keV] : 97.7697 ( -16.0629 38.6788 )
Norm@50keV : 6.17972E-03 ( -0.00120662 0.00158581 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 56 degrees of freedom
# Null hypothesis probability = 4.226658e-01
Photon flux (15-150 keV) in 177.5 sec: 0.477103 ( -0.015567 0.015639 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.11024e-06 ( -1.96812e-07 1.96563e-07 ) ergs/cm2
Band function
Time interval is from -18.200 sec. to 159.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.836033 ( -0.483876 0.886564 )
beta : -1.83001 ( 1.83066 0.128268 )
Epeak [keV] : 66.2988 ( -22.7026 53.7458 )
Norm@50keV : 9.83911E-03 ( -0.00453046 0.0281242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.10 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.335414e-01
Photon flux (15-150 keV) in 177.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.11484e-06 ( -6.1136e-06 -1.92002e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0577 ( )
R^2/D10^2 : 5.17015E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 311.19 using 59 PHA bins.
# Reduced chi-squared = 5.4594 for 57 degrees of freedom
# Null hypothesis probability = 1.075698e-36
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.354e-07 2.281e-08
25- 50 1.736e-06 5.831e-08
50-150 2.683e-06 1.322e-07
15-150 4.855e-06 1.456e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 175.283 (-22.9304 -175.068)
Norm : 1.99449 (-0.0601216 0.0641691)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.77 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.466505e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.955e-07 4.500e-08
25- 50 1.696e-06 1.076e-07
50-150 3.556e-06 7.952e-07
15-150 6.147e-06 9.328e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.87987 (-0.807321 0.834871)
R1^2/D10^2 : 0.334344 (-0.0902346 0.141294)
kT2 [keV] : 26.4475 (-2.78486 3.79816)
R2^2/D10^2 : 5.18139E-03 (-0.00204284 0.00280414)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.24 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.341521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.671e-07 6.781e-08
25- 50 1.755e-06 1.062e-07
50-150 3.526e-06 3.275e-07
15-150 6.048e-06 3.976e-07
Peak spectrum fit
Power-law model
Time interval is from 0.420 sec. to 1.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00993 ( -0.0499634 0.049744 )
Norm@50keV : 7.29493E-02 ( -0.00224446 0.00224328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 112.24 using 59 PHA bins.
# Reduced chi-squared = 1.9691 for 57 degrees of freedom
# Null hypothesis probability = 1.776031e-05
Photon flux (15-150 keV) in 1 sec: 8.40271 ( -0.133239 0.262372 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.862e-07 ( -2.60762e-08 2.58721e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.420 sec. to 1.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.187558 ( -0.236329 0.225179 )
Epeak [keV] : 127.763 ( -16.2962 26.4375 )
Norm@50keV : 0.169044 ( -0.0337934 0.0443703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.65 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 56 degrees of freedom
# Null hypothesis probability = 1.195692e-01
Photon flux (15-150 keV) in 1 sec: 8.20727 ( -0.26723 0.26744 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.66045e-07 ( -2.7467e-08 2.7312e-08 ) ergs/cm2
Band function
Time interval is from 0.420 sec. to 1.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.50510 ( -1.77555 2.03203 )
beta : -1.28206 ( 1.28131 0.0984047 )
Epeak [keV] : 55.6955 ( -10.5717 77.5917 )
Norm@50keV : 1.88977 ( -2.06169 40.9085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.06 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 55 degrees of freedom
# Null hypothesis probability = 1.459349e-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] : 21.5395 ( )
R^2/D10^2 : 0.333996 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.50 using 59 PHA bins.
# Reduced chi-squared = 2.8334 for 57 degrees of freedom
# Null hypothesis probability = 6.238733e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.895e-08 1.715e-09
25- 50 1.512e-07 6.350e-09
50-150 5.236e-07 2.645e-08
15-150 7.037e-07 2.620e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 33.8854 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 402.30 using 59 PHA bins.
# Reduced chi-squared = 7.0579 for 57 degrees of freedom
# Null hypothesis probability = 1.963097e-53
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.438e-08 2.885e-09
25- 50 1.623e-07 5.300e-09
50-150 3.560e-07 1.135e-08
15-150 6.027e-07 2.040e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.5819 (-1.6447 1.88252)
R1^2/D10^2 : 1.49096 (-0.451098 0.750227)
kT2 [keV] : 33.2045 (-4.18082 7.45707)
R2^2/D10^2 : 6.56854E-02 (-0.0333554 0.0416629)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.37 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 55 degrees of freedom
# Null hypothesis probability = 2.050578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.520e-08 5.890e-09
25- 50 1.611e-07 1.810e-08
50-150 5.636e-07 1.034e-07
15-150 7.699e-07 1.079e-07
Plot creation:
Thu Feb 9 20:15:03 EST 2017