batgrbproduct analysis for trigger=763539
batgrbproduct Analysis for Trigger=763539
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): Fri Jul 21 05:07:40 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger763539/GCN5_download_cron
======================================================================
Trigger: 00763539 Segment: 000
BAT Trigger Time: 522218488 [s; MET]
Trigger Stop: 522218552 [s; MET]
UTC: 2017-07-20T04:41:08.603420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 185.366742233104 Dec: 5.02952326900781 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.98
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.98
Flight Position: [ source = BAT ]
RA: 185.366742233104 Dec: 5.02952326900781 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 185.366616408998 Dec: 5.06525575864507 [deg; J2000]
{ 12h 21m 28.0s , +05d 03' 54.9" }
+/- 3.41257373372572 [arcmin] (estimated 90% radius based on SNR)
+/- 1.68625424265941 [arcmin] (formal 1-sigma fit error)
SNR: 5.26711260553143
Angular difference between Flight and Ground position is 2.143963 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.121727 0.231999 0.053783 -0.000001
0.045287 0.046966 0.041118 0.036572 [error]
Peak 0.121727 0.231999 0.053783 -0.000001
0.045287 0.046966 0.041118 0.036572 [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 4.39e-08 6.10e-08 6.26e-08 1.18e-07 2.05e-07 2.87e-07 erg/cm2
Error 1.80e-08 2.09e-08 3.39e-08 1.42e-07 8.36e-08 1.68e-07 erg/cm2
Peak flux Power-law 2.23e-02 1.71e-02 8.80e-03 6.51e-03 5.13e-02 5.48e-02 ph/cm2/s
Error 9.33e-03 5.81e-03 4.62e-03 7.40e-03 1.72e-02 1.89e-02 ph/cm2/s
Fluence Cutoff-PL 4.83e-08 8.65e-08 1.85e-09 2.81e-15 1.37e-07 1.37e-07 erg/cm2
Error 1.74e-08 3.16e-08 7.06e-09 9.84e-12 3.97e-08 3.97e-08 erg/cm2
Peak flux Cutoff-PL 2.25e-02 2.69e-02 3.69e-04 3.65e-10 4.98e-02 4.97e-02 ph/cm2/s
Error 8.73e-03 8.55e-03 1.20e-03 8.91e-07 1.40e-02 1.40e-02 ph/cm2/s
Fluence Band 4.94e-08 8.65e-08 2.56e-08 7.64e-09 1.67e-07 1.70e-07 erg/cm2
Error 1.94e-08 2.99e-08 -------- -------- -------- -------- 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 1.966 0.548 - - 3.47e-04 1.46e-04 55.140 57
CPL -10.000 0.000 28.5 0.0 1.05e+05 0.00e+00 44.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.966 0.548 - - 3.47e-04 1.46e-04 55.140 57
CPL -10.000 0.000 28.5 0.0 1.05e+05 0.00e+00 44.480 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
185.3666 +5.0653 0.0368 22.7 40.3 0.5021 5.3 TRIG_00763539
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96611 ( -0.509706 0.586334 )
Norm@50keV : 3.46998E-04 ( -0.000145406 0.000145896 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 0.9674 for 57 degrees of freedom
# Null hypothesis probability = 5.451684e-01
Photon flux (15-150 keV) in 64 sec: 5.12639E-02 ( -0.0171946 0.0172229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04934e-07 ( -7.98938e-08 8.72141e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 28.4802 ( )
Norm@50keV : 1.05085E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.48 using 59 PHA bins.
# Reduced chi-squared = 0.7943 for 56 degrees of freedom
# Null hypothesis probability = 8.663826e-01
Photon flux (15-150 keV) in 64 sec: 4.97745E-02 4.95321E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57961e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.74267 -5 )
beta : -3.96052 ( 3.96621 1.62217 )
Epeak [keV] : 29.3676 ( -4.69852 5.25273 )
Norm@50keV : 28.2880 ( -8.07186 58.7577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.92 using 59 PHA bins.
# Reduced chi-squared = 0.8349 for 55 degrees of freedom
# Null hypothesis probability = 8.035065e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67343e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.03725 (-1.78964 2.61862)
R^2/D10^2 : 6.38090E-02 (-0.0638085 0.107741)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8662 for 57 degrees of freedom
# Null hypothesis probability = 7.535235e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.787e-08 2.836e-08
25- 50 8.445e-08 5.251e-08
50-150 2.252e-08 1.813e-08
15-150 1.548e-07 9.862e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.8667 (-27.7816 121.014)
Norm : 0.293585 (-0.120824 0.2038)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.20 using 59 PHA bins.
# Reduced chi-squared = 0.9333 for 57 degrees of freedom
# Null hypothesis probability = 6.184782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.650e-08 2.827e-08
25- 50 6.810e-08 4.186e-08
50-150 6.962e-08 5.498e-08
15-150 1.842e-07 1.235e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.90652 (-7.94014 -7.94014)
R1^2/D10^2 : 3.65042E-02 (-0.0366056 -0.0366056)
kT2 [keV] : 8.21582 (-8.10456 -8.10456)
R2^2/D10^2 : 2.71638E-02 (-0.0272299 -0.0272299)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.38 using 59 PHA bins.
# Reduced chi-squared = 0.8978 for 55 degrees of freedom
# Null hypothesis probability = 6.884522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.780e-08 1.428e-02
25- 50 8.451e-08 1.201e-01
50-150 2.268e-08 2.846e+00
15-150 1.550e-07 3.020e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96611 ( -0.509706 0.586334 )
Norm@50keV : 3.46998E-04 ( -0.000145406 0.000145896 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 0.9674 for 57 degrees of freedom
# Null hypothesis probability = 5.451684e-01
Photon flux (15-150 keV) in 64 sec: 5.12639E-02 ( -0.0171946 0.0172229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04934e-07 ( -7.98938e-08 8.72141e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 28.4802 ( )
Norm@50keV : 1.05085E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.48 using 59 PHA bins.
# Reduced chi-squared = 0.7943 for 56 degrees of freedom
# Null hypothesis probability = 8.663826e-01
Photon flux (15-150 keV) in 64 sec: 4.97745E-02 4.95321E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57961e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.74267 -5 )
beta : -3.96052 ( 3.96621 1.62217 )
Epeak [keV] : 29.3676 ( -4.69852 5.25273 )
Norm@50keV : 28.2880 ( -8.07186 58.7577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.92 using 59 PHA bins.
# Reduced chi-squared = 0.8349 for 55 degrees of freedom
# Null hypothesis probability = 8.035065e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67343e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.03725 (-1.78964 2.61862)
R^2/D10^2 : 6.38090E-02 (-0.0638085 0.107741)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8662 for 57 degrees of freedom
# Null hypothesis probability = 7.535235e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.787e-08 2.852e-08
25- 50 8.445e-08 5.213e-08
50-150 2.252e-08 1.752e-08
15-150 1.548e-07 9.718e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.8667 (-27.7816 121.014)
Norm : 0.293585 (-0.120824 0.2038)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.20 using 59 PHA bins.
# Reduced chi-squared = 0.9333 for 57 degrees of freedom
# Null hypothesis probability = 6.184782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.650e-08 2.820e-08
25- 50 6.810e-08 4.221e-08
50-150 6.962e-08 5.558e-08
15-150 1.842e-07 1.180e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.90652 (-7.94014 -7.94014)
R1^2/D10^2 : 3.65042E-02 (-0.0366056 -0.0366056)
kT2 [keV] : 8.21582 (-8.10456 -8.10456)
R2^2/D10^2 : 2.71638E-02 (-0.0272299 -0.0272299)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.38 using 59 PHA bins.
# Reduced chi-squared = 0.8978 for 55 degrees of freedom
# Null hypothesis probability = 6.884522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.780e-08 1.370e-02
25- 50 8.451e-08 1.259e-01
50-150 2.268e-08 3.299e+00
15-150 1.550e-07 3.293e+00
Plot creation:
Fri Jul 21 05:14:37 EDT 2017