batgrbproduct Analysis for Trigger=701590
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): Mon Jun 27 20:35:37 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger701590/GCN5_download_cron
======================================================================
Trigger: 00701590 Segment: 000
BAT Trigger Time: 488642087.36 [s; MET]
Trigger Stop: 488642087.872 [s; MET]
UTC: 2016-06-26T13:54:30.887520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 293.730196159552 Dec: 21.8843548581057 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 26.48
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 26.48
Flight Position: [ source = BAT ]
RA: 293.730196159552 Dec: 21.8843548581057 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.73023679775 Dec: 21.8871458953252 [deg; J2000]
{ 19h 34m 55.3s , +21d 53' 13.7" }
+/- 0.407835847234721 [arcmin] (estimated 90% radius based on SNR)
+/- 0.12715357318136 [arcmin] (formal 1-sigma fit error)
SNR: 109.538758485143
Angular difference between Flight and Ground position is 0.167478 arcmin
Partial Coding Fraction: 0.8203125 [ including projection effects ]
Duration
T90: 0.679999947547913 +/- 0.00400000810623169
Measured from: -0.11599987745285
to: 0.564000070095062 [s; relative to TRIGTIME]
T50: 0.375999927520752 +/- 0.00400000810623169
Measured from: 0.0240001082420349
to: 0.400000035762787 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.273999989032745
to: 0.726000010967255 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.220000028610229
to: 0.667999982833862 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 10.741852 13.619769 3.758339 0.104673
0.048674 0.054111 0.029059 0.006669 [error]
Peak 10.743579 13.620120 3.758176 0.105700
0.048718 0.054148 0.029104 0.006861 [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 6.56e-06 4.65e-06 2.18e-06 1.43e-06 1.41e-05 1.48e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 2.18e+02 8.76e+01 2.06e+01 5.86e+00 3.30e+02 3.32e+02 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
Fluence Cutoff-PL 3.66e-06 5.87e-06 2.99e-06 3.12e-07 1.28e-05 1.28e-05 erg/cm2
Error 1.68e-07 1.05e-07 5.26e-08 2.26e-08 2.44e-07 2.45e-07 erg/cm2
Peak flux Cutoff-PL 1.17e+02 1.06e+02 2.91e+01 1.66e+00 2.54e+02 2.54e+02 ph/cm2/s
Error 5.61e+00 1.96e+00 5.09e-01 1.14e-01 6.82e+00 6.83e+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 3.096 0.000 - - 1.26e+00 0.00e+00 2024.570 57
CPL 0.171 0.144 32.5 1.0 3.42e+01 5.37e+00 60.440 56
The chi2 of BB fit is 407.73 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.090 0.000 - - 1.12e+00 0.00e+00 1991.860 57
CPL 0.173 0.145 32.4 1.0 3.03e+01 4.78e+00 59.680 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: 0.640000 sec.
T50 in the 50-300 keV band: 0.384000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.888 -0.220 0.668
T90 0.680 -0.116 0.564
T50 0.376 0.024 0.400
Peak 1.000 -0.274 0.726
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.7302 +21.8871 0.0017 25.5 23.1 29.5156 109.5 TRIG_00701590
------------------------------------------
Foreground time interval of the image:
-0.220 0.668 (delta_t = 0.888 [sec])
Background time interval of the image:
-185.159 -143.100 (delta_t = 42.059 [sec])
-142.360 -0.220 (delta_t = 142.140 [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 -0.220 sec. to 0.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.09617 ( )
Norm@50keV : 1.26054 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 2024.57 using 59 PHA bins.
# Reduced chi-squared = 35.5187 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Photon flux (15-150 keV) in 0.888 sec: 372.120 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.408e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.220 sec. to 0.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.171094 ( -0.146257 0.142603 )
Epeak [keV] : 32.4553 ( -1.07011 1.00802 )
Norm@50keV : 34.1964 ( -4.88587 5.85479 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 56 degrees of freedom
# Null hypothesis probability = 3.185512e-01
Photon flux (15-150 keV) in 0.888 sec: 286.364 ( -7.64 7.715 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2807e-05 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.220 sec. to 0.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.125366 ( -0.236355 0.235409 )
beta : -5.16722 ( -0.502269 0.28662 )
Epeak [keV] : 33.5365 ( -1.13906 0.985975 )
Norm@50keV : 49.4527 ( -11.5769 16.6583 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8839 for 55 degrees of freedom
# Null hypothesis probability = 7.155482e-01
Photon flux (15-150 keV) in 0.888 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] : 10.2689 ( )
R^2/D10^2 : 116.507 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 407.73 using 59 PHA bins.
# Reduced chi-squared = 7.1531 for 57 degrees of freedom
# Null hypothesis probability = 1.880482e-54
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.241e-06 6.172e-08
25- 50 5.782e-06 1.150e-07
50-150 3.257e-06 5.861e-08
15-150 1.128e-05 1.909e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.4502 ( )
Norm : 2719.14 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 290.10 using 59 PHA bins.
# Reduced chi-squared = 5.0895 for 57 degrees of freedom
# Null hypothesis probability = 6.009499e-33
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.952e-06 1.083e-07
25- 50 5.704e-06 9.946e-08
50-150 3.185e-06 5.506e-08
15-150 1.384e-05 2.264e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.59201 (-0.430038 0.403849)
R1^2/D10^2 : 309.243 (-43.282 57.1769)
kT2 [keV] : 14.2373 (-0.790781 0.985929)
R2^2/D10^2 : 11.7488 (-4.52179 6.11535)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.50 using 59 PHA bins.
# Reduced chi-squared = 0.7364 for 55 degrees of freedom
# Null hypothesis probability = 9.280602e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.191e-06 1.696e-07
25- 50 6.065e-06 1.736e-07
50-150 3.235e-06 1.661e-07
15-150 1.249e-05 4.085e-07
Peak spectrum fit
Power-law model
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.08950 ( )
Norm@50keV : 1.12377 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1991.86 using 59 PHA bins.
# Reduced chi-squared = 34.9448 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Photon flux (15-150 keV) in 1 sec: 330.102 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40892e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.172957 ( -0.146835 0.143165 )
Epeak [keV] : 32.4472 ( -1.07318 1.01044 )
Norm@50keV : 30.2977 ( -4.34939 5.21607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.68 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.433840e-01
Photon flux (15-150 keV) in 1 sec: 254.332 ( -6.789 6.857 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28086e-05 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 7.18520E-02 ( -0.225159 0.261152 )
beta : -5.20230 ( -0.467052 0.292834 )
Epeak [keV] : 33.3183 ( -1.0883 1.01934 )
Norm@50keV : 41.2177 ( -10.1454 15.5215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.15 using 59 PHA bins.
# Reduced chi-squared = 0.8572 for 55 degrees of freedom
# Null hypothesis probability = 7.653048e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27123e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2637 ( )
R^2/D10^2 : 103.704 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 405.10 using 59 PHA bins.
# Reduced chi-squared = 7.1071 for 57 degrees of freedom
# Null hypothesis probability = 5.849247e-54
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.244e-06 6.300e-08
25- 50 5.785e-06 1.100e-07
50-150 3.254e-06 6.100e-08
15-150 1.128e-05 1.850e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.4966 ( )
Norm : 2409.96 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 286.49 using 59 PHA bins.
# Reduced chi-squared = 5.0261 for 57 degrees of freedom
# Null hypothesis probability = 2.601527e-32
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.946e-06 1.190e-07
25- 50 5.703e-06 9.900e-08
50-150 3.191e-06 5.600e-08
15-150 1.384e-05 2.200e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.59992 (-0.431418 0.404823)
R1^2/D10^2 : 274.149 (-38.385 50.7176)
kT2 [keV] : 14.2695 (-0.803923 1.00549)
R2^2/D10^2 : 10.2833 (-4.00043 5.43628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.57 using 59 PHA bins.
# Reduced chi-squared = 0.7195 for 55 degrees of freedom
# Null hypothesis probability = 9.419201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.190e-06 1.435e-07
25- 50 6.065e-06 1.660e-07
50-150 3.236e-06 1.845e-07
15-150 1.249e-05 3.950e-07
Plot creation:
Mon Jun 27 20:40:01 EDT 2016