batgrbproduct Analysis for Trigger=689597
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): Tue Jun 7 09:18:11 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger689597/GCN5_download_cron
======================================================================
Trigger: 00689597 Segment: 000
BAT Trigger Time: 486990857.216 [s; MET]
Trigger Stop: 486990858.24 [s; MET]
UTC: 2016-06-07T11:14:00.834700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 13.6632736804159 Dec: -4.94811943449746 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.09
Image Trigger?: NO
Rate S/N Ratio: 172.840967365958 [ if not an image trigger ]
Image S/N Ratio: 24.09
Flight Position: [ source = BAT ]
RA: 13.6632736804159 Dec: -4.94811943449746 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 13.6614962569118 Dec: -4.95223268734033 [deg; J2000]
{ 00h 54m 38.8s , -04d 57' 08.0" }
+/- 0.414117169920023 [arcmin] (estimated 90% radius based on SNR)
+/- 0.102541690032973 [arcmin] (formal 1-sigma fit error)
SNR: 107.172949664148
Angular difference between Flight and Ground position is 0.268694 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 33.3599998950958 +/- 0.451220569866101
Measured from: -1.08399987220764
to: 32.2760000228882 [s; relative to TRIGTIME]
T50: 8.37599992752075 +/- 0.231931014187959
Measured from: 5.18000012636185
to: 13.5560000538826 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.6480000019073
to: 12.6480000019073 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.8880000114441
to: 44.0799999833107 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.146917 11.331657 9.920130 2.632217
0.060782 0.070211 0.066090 0.048192 [error]
Peak 0.540379 0.960230 0.940488 0.244777
0.013065 0.016765 0.016940 0.010390 [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 2.42e-06 4.82e-06 7.45e-06 2.53e-05 2.08e-05 4.00e-05 erg/cm2
Error 7.21e-08 8.58e-08 9.59e-08 7.58e-07 2.59e-07 7.69e-07 erg/cm2
Peak flux Power-law 5.87e+00 6.95e+00 5.95e+00 8.65e+00 2.18e+01 2.74e+01 ph/cm2/s
Error 2.64e-01 1.90e-01 1.42e-01 4.40e-01 5.13e-01 6.07e-01 ph/cm2/s
Fluence Cutoff-PL 2.24e-06 4.82e-06 7.66e-06 2.03e-05 2.07e-05 3.50e-05 erg/cm2
Error 1.02e-07 8.77e-08 1.29e-07 1.89e-06 2.66e-07 1.89e-06 erg/cm2
Peak flux Cutoff-PL 5.04e+00 7.09e+00 6.35e+00 5.55e+00 2.12e+01 2.40e+01 ph/cm2/s
Error 3.44e-01 2.03e-01 1.87e-01 7.22e-01 5.38e-01 9.28e-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 1.371 0.023 - - 3.69e-02 4.99e-04 44.400 57
CPL 1.146 0.098 245.1 92.7 4.52e-02 3.88e-03 28.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.226 0.038 - - 1.85e-01 4.08e-03 65.400 57
CPL 0.693 0.168 144.9 29.5 3.15e-01 5.14e-02 32.720 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: 30.848000 sec.
T50 in the 50-300 keV band: 7.232000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 57.968 -13.888 44.080
T90 33.360 -1.084 32.276
T50 8.376 5.180 13.556
Peak 1.000 11.648 12.648
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
13.6615 -4.9522 0.0018 27.8 -4.9 23.1733 107.2 TRIG_00689597
------------------------------------------
Foreground time interval of the image:
-13.888 13.285 (delta_t = 27.173 [sec])
Background time interval of the image:
-29.915 -13.888 (delta_t = 16.027 [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 -13.888 sec. to 44.080 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37138 ( -0.0232991 0.0232234 )
Norm@50keV : 3.69347E-02 ( -0.00049911 0.000498247 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.40 using 59 PHA bins.
# Reduced chi-squared = 0.7790 for 57 degrees of freedom
# Null hypothesis probability = 8.880900e-01
Photon flux (15-150 keV) in 57.97 sec: 4.46961 ( -0.0719525 0.0722054 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08135e-05 ( -2.58629e-07 2.58622e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.888 sec. to 44.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14615 ( -0.099244 0.0973265 )
Epeak [keV] : 245.106 ( -54.5497 130.788 )
Norm@50keV : 4.51677E-02 ( -0.00368579 0.00407605 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.56 using 59 PHA bins.
# Reduced chi-squared = 0.5101 for 56 degrees of freedom
# Null hypothesis probability = 9.991481e-01
Photon flux (15-150 keV) in 57.97 sec: 4.37728 ( -0.08034 0.08088 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06798e-05 ( -2.65966e-07 2.6585e-07 ) ergs/cm2
Band function
Time interval is from -13.888 sec. to 44.080 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13907 ( -0.098301 0.069236 )
beta : -1.60826 ( 1.60915 0.201361 )
Epeak [keV] : 237.212 ( -159.584 136.048 )
Norm@50keV : 4.55185E-02 ( -0.00402466 0.241037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.52 using 59 PHA bins.
# Reduced chi-squared = 0.5186 for 55 degrees of freedom
# Null hypothesis probability = 9.988097e-01
Photon flux (15-150 keV) in 57.97 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] : 21.6975 ( )
R^2/D10^2 : 0.144425 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1164.06 using 59 PHA bins.
# Reduced chi-squared = 20.4221 for 57 degrees of freedom
# Null hypothesis probability = 3.358347e-206
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.340e-07 2.087e-08
25- 50 3.850e-06 8.290e-08
50-150 1.353e-05 2.174e-07
15-150 1.812e-05 2.377e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 19.6065 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 371.24 using 59 PHA bins.
# Reduced chi-squared = 6.5130 for 57 degrees of freedom
# Null hypothesis probability = 1.211531e-47
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.830e-06 4.348e-08
25- 50 5.444e-06 8.522e-08
50-150 1.194e-05 1.710e-07
15-150 2.021e-05 3.217e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.59831 (-0.462426 0.48633)
R1^2/D10^2 : 1.99119 (-0.333794 0.416618)
kT2 [keV] : 32.4489 (-1.38724 1.60319)
R2^2/D10^2 : 3.04351E-02 (-0.00481315 0.00521111)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.48 using 59 PHA bins.
# Reduced chi-squared = 0.7179 for 55 degrees of freedom
# Null hypothesis probability = 9.431826e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.896e-06 1.093e-07
25- 50 4.960e-06 1.307e-07
50-150 1.370e-05 2.812e-07
15-150 2.056e-05 3.536e-07
Peak spectrum fit
Power-law model
Time interval is from 11.648 sec. to 12.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22594 ( -0.0380327 0.0379555 )
Norm@50keV : 0.185359 ( -0.00407804 0.00407612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.40 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.081421e-01
Photon flux (15-150 keV) in 1 sec: 21.8401 ( -0.513025 0.513754 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86706e-06 ( -4.28654e-08 4.28935e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.648 sec. to 12.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.693160 ( -0.170704 0.164759 )
Epeak [keV] : 144.882 ( -21.2591 37.8023 )
Norm@50keV : 0.314853 ( -0.0464208 0.056355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.72 using 59 PHA bins.
# Reduced chi-squared = 0.5844 for 56 degrees of freedom
# Null hypothesis probability = 9.945197e-01
Photon flux (15-150 keV) in 1 sec: 21.2447 ( -0.537 0.539 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83427e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 11.648 sec. to 12.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.623308 ( -0.213483 0.377619 )
beta : -1.65958 ( 1.6632 0.23575 )
Epeak [keV] : 130.280 ( -42.5826 46.5157 )
Norm@50keV : 0.342401 ( -0.0687027 0.211509 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.18 using 59 PHA bins.
# Reduced chi-squared = 0.5851 for 55 degrees of freedom
# Null hypothesis probability = 9.940434e-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] : 20.1586 ( )
R^2/D10^2 : 0.989323 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 312.51 using 59 PHA bins.
# Reduced chi-squared = 5.4825 for 57 degrees of freedom
# Null hypothesis probability = 6.242681e-37
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.726e-08 3.555e-09
25- 50 3.868e-07 1.265e-08
50-150 1.167e-06 4.050e-08
15-150 1.631e-06 4.500e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 92.9118 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 275.98 using 59 PHA bins.
# Reduced chi-squared = 4.8418 for 57 degrees of freedom
# Null hypothesis probability = 1.796754e-30
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.314e-07 5.450e-09
25- 50 4.450e-07 1.020e-08
50-150 9.761e-07 2.325e-08
15-150 1.653e-06 4.050e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.78344 (-1.00226 1.10752)
R1^2/D10^2 : 7.75569 (-2.1937 3.42636)
kT2 [keV] : 30.3972 (-2.4663 3.40265)
R2^2/D10^2 : 0.205696 (-0.0659082 0.075677)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.21 using 59 PHA bins.
# Reduced chi-squared = 0.6948 for 55 degrees of freedom
# Null hypothesis probability = 9.586473e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.445e-07 1.260e-08
25- 50 4.181e-07 2.130e-08
50-150 1.271e-06 7.400e-08
15-150 1.833e-06 8.400e-08
Plot creation:
Tue Jun 7 09:21:57 EDT 2016