batgrbproduct Analysis for Trigger=689353
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 09:06:24 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger689353/batgroup_hand_proc
======================================================================
Trigger: 00689353 Segment: 000
BAT Trigger Time: 486909480 [s; MET]
Trigger Stop: 486909824 [s; MET]
UTC: 2016-06-06T12:37:43.623220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.41131583894 Dec: -29.0071154363649 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.46
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.46
Flight Position: [ source = BAT ]
RA: 266.41131583894 Dec: -29.0071154363649 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.506623190176 Dec: -29.0631422148877 [deg; J2000]
{ 17h 46m 01.6s , -29d 03' 47.3" }
+/- 3.66962132716753 [arcmin] (estimated 90% radius based on SNR)
+/- 2.06421994498229 [arcmin] (formal 1-sigma fit error)
SNR: 4.7480643098846
Angular difference between Flight and Ground position is 6.024782 arcmin
Partial Coding Fraction: 0.9375 [ including projection effects ]
Duration
T90: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
T50: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 344 second)
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.438836 0.544435 0.177119 0.182039
0.120348 0.108485 0.090913 0.076876 [error]
Peak 0.438836 0.544435 0.177119 0.182039
0.120348 0.108485 0.090913 0.076876 [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 1.42e-07 1.93e-07 1.93e-07 3.49e-07 6.41e-07 8.77e-07 erg/cm2
Error 4.91e-08 4.79e-08 8.50e-08 3.18e-07 1.95e-07 4.11e-07 erg/cm2
Peak flux Power-law 1.35e-02 1.01e-02 5.05e-03 3.61e-03 3.03e-02 3.22e-02 ph/cm2/s
Error 4.75e-03 2.48e-03 2.15e-03 3.03e-03 7.41e-03 7.99e-03 ph/cm2/s
Fluence Cutoff-PL 1.43e-07 1.93e-07 1.92e-07 2.95e-07 6.39e-07 8.12e-07 erg/cm2
Error 4.99e-08 7.76e-08 -------- 3.79e-07 2.32e-07 4.79e-07 erg/cm2
Peak flux Cutoff-PL 1.35e-02 1.01e-02 5.03e-03 3.54e-03 3.03e-02 3.22e-02 ph/cm2/s
Error 4.88e-03 3.61e-03 3.02e-03 3.70e-03 7.40e-03 9.11e-03 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 2.001 0.495 - - 2.02e-04 6.49e-05 54.330 57
CPL 2.072 3.096 36.7 0.0 1.83e-04 0.00e+00 54.310 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 2.001 0.495 - - 2.02e-04 6.49e-05 54.330 57
CPL 2.072 3.096 36.7 0.0 1.83e-04 0.00e+00 54.310 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 344.000 0.000 344.000
T90 344.000 0.000 344.000
T50 344.000 0.000 344.000
Peak 344.000 0.000 344.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.5066 -29.0631 0.0407 13.4311 40.8327 1.4318084 4.748 TRIG_00689353
Foreground time interval of the image:
0.000 344.000 (delta_t = 344.000 [sec])
Background time interval of the image:
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 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00050 ( -0.466882 0.523956 )
Norm@50keV : 2.02051E-04 ( -6.66948e-05 6.31712e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9531 for 57 degrees of freedom
# Null hypothesis probability = 5.759566e-01
Photon flux (15-150 keV) in 344 sec: 3.03146E-02 ( -0.00740847 0.00741043 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40986e-07 ( -1.88594e-07 2.0051e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07246 ( -5.35182 0.840782 )
Epeak [keV] : 36.6634 ( )
Norm@50keV : 1.82809E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9699 for 56 degrees of freedom
# Null hypothesis probability = 5.388933e-01
Photon flux (15-150 keV) in 344 sec: 3.03126E-02 ( -0.0074082 0.0073962 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.39186e-07 ( -2.63212e-07 1.9983e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00301 ( 1.20412 1.20412 )
beta : -2.33481 ( 2.28712 0.722281 )
Epeak [keV] : 35.1933 ( -35.6449 73.4232 )
Norm@50keV : 8.62002E-04 ( -0.000562403 107.588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.95 using 59 PHA bins.
# Reduced chi-squared = 0.9809 for 55 degrees of freedom
# Null hypothesis probability = 5.147752e-01
Photon flux (15-150 keV) in 344 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] : 8.99229 (-2.0236 2.73104)
R^2/D10^2 : 2.13170E-02 (-0.0138549 0.036705)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 0.9811 for 57 degrees of freedom
# Null hypothesis probability = 5.154828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.154e-07 6.926e-08
25- 50 2.449e-07 1.308e-07
50-150 9.320e-08 6.422e-08
15-150 4.535e-07 2.127e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.2823 (-31.3541 -60.2784)
Norm : 0.157940 (-0.0561095 0.0969868)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9562 for 57 degrees of freedom
# Null hypothesis probability = 5.692083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-07 4.947e-08
25- 50 2.083e-07 9.859e-08
50-150 2.379e-07 1.738e-07
15-150 5.828e-07 3.160e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.08 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9967 for 55 degrees of freedom
# Reduced chi-squared = 0.9470 for 55 degrees of freedom
# Reduced chi-squared = 0.9465 for 55 degrees of freedom
# Reduced chi-squared = 0.9463 for 55 degrees of freedom
# Null hypothesis probability = 4.814301e-01
# Null hypothesis probability = 5.868050e-01
# Null hypothesis probability = 5.877353e-01
# Null hypothesis probability = 5.881564e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-07 6.414e-08
25- 50 2.274e-07 1.361e-07
50-150 1.222e-07 8.227e-08
15-150 4.824e-07 2.690e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00050 ( -0.466882 0.523956 )
Norm@50keV : 2.02051E-04 ( -6.66948e-05 6.31712e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9531 for 57 degrees of freedom
# Null hypothesis probability = 5.759566e-01
Photon flux (15-150 keV) in 344 sec: 3.03146E-02 ( -0.00740847 0.00741043 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40986e-07 ( -1.88594e-07 2.0051e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07246 ( -5.35182 0.840782 )
Epeak [keV] : 36.6634 ( )
Norm@50keV : 1.82809E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9699 for 56 degrees of freedom
# Null hypothesis probability = 5.388933e-01
Photon flux (15-150 keV) in 344 sec: 3.03126E-02 ( -0.0074082 0.0073962 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.39186e-07 ( -2.63212e-07 1.9983e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00301 ( 1.20412 1.20412 )
beta : -2.33481 ( 2.28712 0.722281 )
Epeak [keV] : 35.1933 ( -35.6449 73.4232 )
Norm@50keV : 8.62002E-04 ( -0.000562403 102.995 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.95 using 59 PHA bins.
# Reduced chi-squared = 0.9809 for 55 degrees of freedom
# Null hypothesis probability = 5.147752e-01
Photon flux (15-150 keV) in 344 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] : 8.99229 (-2.0236 2.73104)
R^2/D10^2 : 2.13170E-02 (-0.0138549 0.036705)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 0.9811 for 57 degrees of freedom
# Null hypothesis probability = 5.154828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.154e-07 5.334e-08
25- 50 2.449e-07 1.432e-07
50-150 9.320e-08 5.987e-08
15-150 4.535e-07 2.177e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.2823 (-31.3541 -60.2784)
Norm : 0.157940 (-0.0561095 0.0969868)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9562 for 57 degrees of freedom
# Null hypothesis probability = 5.692083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-07 5.399e-08
25- 50 2.083e-07 9.954e-08
50-150 2.379e-07 1.601e-07
15-150 5.828e-07 3.072e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.08 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9967 for 55 degrees of freedom
# Reduced chi-squared = 0.9470 for 55 degrees of freedom
# Reduced chi-squared = 0.9465 for 55 degrees of freedom
# Reduced chi-squared = 0.9463 for 55 degrees of freedom
# Null hypothesis probability = 4.814301e-01
# Null hypothesis probability = 5.868050e-01
# Null hypothesis probability = 5.877353e-01
# Null hypothesis probability = 5.881564e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-07 6.741e-08
25- 50 2.274e-07 1.354e-07
50-150 1.222e-07 8.421e-08
15-150 4.824e-07 2.618e-07
Plot creation:
Tue Jun 7 10:01:29 EDT 2016