batgrbproduct analysis for trigger=739517
batgrbproduct Analysis for Trigger=739517
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 23 00:22:27 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger739517/GCN5_download_cron
======================================================================
Trigger: 00739517 Segment: 000
BAT Trigger Time: 509423089.728 [s; MET]
Trigger Stop: 509423090.752 [s; MET]
UTC: 2017-02-22T02:24:31.077200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 230.669606804857 Dec: -55.7392105197555 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.52
Image Trigger?: NO
Rate S/N Ratio: 23.7276210354093 [ if not an image trigger ]
Image S/N Ratio: 6.52
Flight Position: [ source = BAT ]
RA: 230.669606804857 Dec: -55.7392105197555 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 230.610354211367 Dec: -55.7334248790827 [deg; J2000]
{ 15h 22m 26.5s , -55d 44' 00.3" }
+/- 5.58438186852973 [arcmin] (estimated 90% radius based on SNR)
+/- 5.12974220253542 [arcmin] (formal 1-sigma fit error)
SNR: 2.60622005479362
Angular difference between Flight and Ground position is 2.031440 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -28.7279998660088
to: 19.2720001339912 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -12.7279998660088
to: 19.2720001339912 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 26.772000014782
to: 27.772000014782 [s; relative to TRIGTIME]
Total Fluence
Measured from: -28.727999985218
to: 19.272000014782 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.372795 0.822952 0.382715 0.431671
0.063610 0.074119 0.071957 0.087488 [error]
Peak 0.003607 0.010960 0.024538 -0.002731
0.010560 0.012583 0.012485 0.015732 [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 1.37e-07 2.54e-07 3.63e-07 1.10e-06 1.04e-06 1.85e-06 erg/cm2
Error 2.70e-08 3.29e-08 6.98e-08 4.38e-07 1.68e-07 5.03e-07 erg/cm2
Peak flux Power-law 5.69e-02 9.64e-02 1.24e-01 3.23e-01 3.66e-01 6.00e-01 ph/cm2/s
Error 9.45e-02 9.99e-02 1.11e-01 1.25e+00 3.28e-01 1.29e+00 ph/cm2/s
Fluence Cutoff-PL 1.26e-07 2.99e-07 3.16e-07 1.25e-07 8.32e-07 8.79e-07 erg/cm2
Error 4.41e-08 9.14e-08 1.67e-07 5.78e-07 3.05e-07 7.36e-07 erg/cm2
Peak flux Cutoff-PL 5.52e-02 9.67e-02 1.26e-01 2.88e-01 3.65e-01 5.66e-01 ph/cm2/s
Error 9.41e-02 1.24e-01 1.26e-01 -------- 2.91e-01 1.47e+00 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 1.483 0.227 - - 2.27e-03 3.23e-04 74.720 57
CPL -2.357 4.092 41.6 411.2 5.11e-01 9.28e+01 73.090 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.634 1.112 - - 3.15e-03 2.86e-03 57.550 57
CPL 0.410 0.000 417.5 0.0 3.93e-03 0.00e+00 57.550 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: 67.904000 sec.
T50 in the 50-300 keV band: 32.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 48.000 -28.728 19.272
T90 48.000 -28.728 19.272
T50 32.000 -12.728 19.272
Peak 1.000 26.772 27.772
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
230.6104 -55.7334 0.0738 25.9 174.1 0.9144 2.6 TRIG_00739517
------------------------------------------
Foreground time interval of the image:
-28.728 19.272 (delta_t = 48.000 [sec])
Background time interval of the image:
-60.728 -54.977 (delta_t = 5.751 [sec])
-53.728 -28.728 (delta_t = 25.000 [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 -28.728 sec. to 19.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48252 ( -0.224269 0.229256 )
Norm@50keV : 2.26762E-03 ( -0.000326045 0.000320674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.72 using 59 PHA bins.
# Reduced chi-squared = 1.311 for 57 degrees of freedom
# Null hypothesis probability = 5.769738e-02
Photon flux (15-150 keV) in 48 sec: 0.281778 ( -0.0363421 0.0363425 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03558e-06 ( -1.6542e-07 1.70645e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -28.728 sec. to 19.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.35691 ( -4.04955 4.13418 )
Epeak [keV] : 41.6416 ( -4.74991 817.637 )
Norm@50keV : 0.510817 ( -0.492619 185.191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.09 using 59 PHA bins.
# Reduced chi-squared = 1.305 for 56 degrees of freedom
# Null hypothesis probability = 6.224921e-02
Photon flux (15-150 keV) in 48 sec: 0.263245 0.248755 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3959e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from -28.728 sec. to 19.272 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.53418 ( -4.34766 -4.53418 )
beta : -2.48184 ( -1.02368 0.584753 )
Epeak [keV] : 37.1437 ( -3.69236 4.15613 )
Norm@50keV : 13.8380 ( -1.73644 69.8511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.57 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 55 degrees of freedom
# Null hypothesis probability = 1.557934e-01
Photon flux (15-150 keV) in 48 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] : 11.1204 (-1.34061 1.61978)
R^2/D10^2 : 9.40866E-02 (-0.0366601 0.0552555)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.41 using 59 PHA bins.
# Reduced chi-squared = 1.288 for 57 degrees of freedom
# Null hypothesis probability = 7.057805e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-07 2.407e-08
25- 50 3.353e-07 5.969e-08
50-150 2.362e-07 7.243e-08
15-150 6.884e-07 1.238e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-98.293 -199.363)
Norm : 1.14906 (-0.147899 0.147907)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.99 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 57 degrees of freedom
# Null hypothesis probability = 6.467364e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.373e-07 7.735e-08
25- 50 2.642e-07 1.474e-07
50-150 5.794e-07 3.230e-07
15-150 9.810e-07 5.462e-07
Double BB
R1^2/D10^2 : 3.91380E-05 (-1.54293e-05 1.54378e-05)
kT2 [keV] : 9.57288 (-0.964044 1.37927)
R2^2/D10^2 : 0.142412 (-0.0550456 0.0749236)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.41 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.25 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.63 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 55 degrees of freedom
# Reduced chi-squared = 1.095 for 55 degrees of freedom
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 4.918001e-02
# Null hypothesis probability = 2.916149e-01
# Null hypothesis probability = 3.109455e-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
Peak spectrum fit
Power-law model
Time interval is from 26.772 sec. to 27.772 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.633926 ( -0.633926 1.58941 )
Norm@50keV : 3.14809E-03 ( -0.00314809 0.00256536 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.545707e-01
Photon flux (15-150 keV) in 1 sec: 0.366121 ( -0.366121 0.289845 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.96143e-08 ( -3.14618e-08 3.37423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.772 sec. to 27.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.410088 ( -0.426077 -0.426077 )
Epeak [keV] : 417.530 ( -475.288 -475.288 )
Norm@50keV : 3.93464E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.174820e-01
Photon flux (15-150 keV) in 1 sec: 0.364686 ( -0.290991 0.290859 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94303e-08 ( -3.94303e-08 3.39121e-08 ) ergs/cm2
Band function
Time interval is from 26.772 sec. to 27.772 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.33470 ( -8.48885 4.76004 )
beta : -0.961772 ( 9.37078 9.37078 )
Epeak [keV] : 34.4198 ( -340.094 -367.714 )
Norm@50keV : 13.1198 ( -13.0797 35.1067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.28 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.907369e-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] : 32.6700 (-32.6825 -32.6825)
R^2/D10^2 : 4.43462E-03 (-0.00442957 0.760418)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.81 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.450119e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.016e-10 4.872e-10
25- 50 4.475e-09 3.159e-09
50-150 3.247e-08 2.476e-08
15-150 3.765e-08 2.934e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.363 -199.363)
Norm : 1.35823 (-1.18586 1.18691)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.64 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.151196e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.382e-09 2.912e-09
25- 50 6.506e-09 5.375e-09
50-150 1.427e-08 1.205e-08
15-150 2.416e-08 2.018e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 67.9491 (-65.4661 -65.4661)
R1^2/D10^2 : 6.87345E-04 (-0.000796153 0.34)
kT2 [keV] : 7.69508 (-7.5782 -7.5782)
R2^2/D10^2 : 0.226201 (-0.234059 -0.234059)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.23 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.923066e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.620e-09 1.806e-09
25- 50 5.911e-09 4.295e-09
50-150 3.354e-08 1.826e-08
15-150 4.207e-08 2.107e-08
Plot creation:
Thu Feb 23 00:27:11 EST 2017