batgrbproduct Analysis for Trigger=652824
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): Fri Aug 21 16:04:34 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger652824/GCN5_download_cron
======================================================================
Trigger: 00652824 Segment: 000
BAT Trigger Time: 461816264 [s; MET]
Trigger Stop: 461816712 [s; MET]
UTC: 2015-08-21T02:17:28.977860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 10.2408427066456 Dec: 41.0807680221844 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.04
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.04
Flight Position: [ source = BAT ]
RA: 10.2408427066456 Dec: 41.0807680221844 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 10.2247237534408 Dec: 41.0671640166543 [deg; J2000]
{ 00h 40m 53.9s , +41d 04' 01.8" }
+/- 7.01687957153593 [arcmin] (estimated 90% radius based on SNR)
+/- 4.05974866092157 [arcmin] (formal 1-sigma fit error)
SNR: 1.88079388613277
Angular difference between Flight and Ground position is 1.094449 arcmin
Partial Coding Fraction: 0.453125 [ including projection effects ]
Duration
T90: 448 +/-
Measured from: 0
to: 448 [s; relative to TRIGTIME]
T50: 448 +/-
Measured from: 0
to: 448 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 448 second)
Measured from: 0
to: 448 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 448 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.134292 0.271865 0.008010 -0.001762
0.122661 0.126794 0.112806 0.103667 [error]
Peak 0.134292 0.271865 0.008010 -0.001762
0.122661 0.126794 0.112806 0.103667 [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 5.78e-08 6.98e-08 6.18e-08 9.04e-08 2.20e-07 2.66e-07 erg/cm2
Error 5.98e-08 6.11e-08 7.76e-08 1.14e-06 2.26e-07 1.14e-06 erg/cm2
Peak flux Power-law 1.04e-02 6.94e-03 3.02e-03 1.79e-03 2.13e-02 2.22e-02 ph/cm2/s
Error 1.09e-02 6.02e-03 3.77e-03 5.66e-03 1.98e-02 1.92e-02 ph/cm2/s
Fluence Cutoff-PL 6.31e-08 1.29e-07 3.46e-09 8.81e-15 1.96e-07 1.96e-07 erg/cm2
Error 6.32e-08 8.90e-08 3.07e-08 2.02e-09 1.18e-07 1.18e-07 erg/cm2
Peak flux Cutoff-PL 1.03e-02 1.39e-02 2.47e-04 4.42e-10 2.45e-02 2.44e-02 ph/cm2/s
Error 1.08e-02 8.78e-03 1.69e-03 6.03e-05 1.46e-02 1.46e-02 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 2.186 1.845 - - 1.29e-04 1.35e-04 78.510 57
CPL -9.961 0.033 29.5 7.7 3.26e+04 3.55e+05 74.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.186 1.845 - - 1.29e-04 1.35e-04 78.510 57
CPL -9.961 0.033 29.5 7.7 3.26e+04 3.55e+05 74.240 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 448.000 0.000 448.000
T90 448.000 0.000 448.000
T50 448.000 0.000 448.000
Peak 448.000 0.000 448.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
10.2247 +41.0672 0.1027 43.6 -173.0 0.5760 1.9 TRIG_00652824
------------------------------------------
Foreground time interval of the image:
0.000 105.790 (delta_t = 105.790 [sec])
107.000 183.036 (delta_t = 76.036 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 105.790000
107.000000 183.036000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18601 ( -1.69935 1.99066 )
Norm@50keV : 1.29002E-04 ( -0.000128415 0.000141015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.51 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 57 degrees of freedom
# Null hypothesis probability = 3.101768e-02
Photon flux (15-150 keV) in 181.8 sec: 2.12799E-02 ( -0.0212801 0.0183498 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20005e-07 ( -2.17006e-07 2.35627e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 105.790000
107.000000 183.036000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.96103 ( 9.97777 10.0436 )
Epeak [keV] : 29.4775 ( -6.88604 8.49573 )
Norm@50keV : 3.26330E+04 ( -34885.4 675951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.24 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 56 degrees of freedom
# Null hypothesis probability = 5.190089e-02
Photon flux (15-150 keV) in 181.8 sec: 2.44611E-02 2.42623E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16194e-18 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 105.790000
107.000000 183.036000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -9.37167 ( 9.37167 7.86045 )
Epeak [keV] : 29.7337 ( -8.78361 12.0346 )
Norm@50keV : 12.9980 ( -8.03419 163.059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.01 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 55 degrees of freedom
# Null hypothesis probability = 3.775426e-02
Photon flux (15-150 keV) in 181.8 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] : 7.46510 (-2.93482 5.52853)
R^2/D10^2 : 4.05983E-02 (-0.0407767 0.270399)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.09 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.640429e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.030e-08 4.829e-08
25- 50 1.087e-07 8.290e-08
50-150 2.261e-08 2.311e-08
15-150 2.016e-07 1.424e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.3013 (-32.6564 -32.6564)
Norm : 0.174944 (-0.175399 0.528065)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.76 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 57 degrees of freedom
# Null hypothesis probability = 3.518288e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.710e-08 4.522e-08
25- 50 7.976e-08 5.515e-08
50-150 4.802e-08 5.449e-08
15-150 1.949e-07 1.587e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.23723 (-7.43928 192.559)
R1^2/D10^2 : 4.56134E-02 (-0.0222539 -0.0222539)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 4.83102E-07 (-4.89123e-07 -4.89123e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 76.07 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 55 degrees of freedom
# Reduced chi-squared = 1.383 for 55 degrees of freedom
# Null hypothesis probability = 3.137353e-02
# Null hypothesis probability = 3.147240e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.061e-08 5.649e+01
25- 50 1.085e-07 4.474e+02
50-150 2.229e-08 1.102e+04
15-150 2.014e-07 1.122e+04
Peak spectrum fit
Power-law model
Time interval is from 107.000 sec. to 183.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18601 ( -1.69935 1.99066 )
Norm@50keV : 1.29002E-04 ( -0.000128415 0.000141015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.51 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 57 degrees of freedom
# Null hypothesis probability = 3.101768e-02
Photon flux (15-150 keV) in 181.8 sec: 2.12799E-02 ( -0.0212801 0.0183498 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20005e-07 ( -2.17006e-07 2.35627e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 107.000 sec. to 183.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.96103 ( 9.97777 10.0436 )
Epeak [keV] : 29.4775 ( -6.88604 8.49573 )
Norm@50keV : 3.26330E+04 ( -34885.4 675951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.24 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 56 degrees of freedom
# Null hypothesis probability = 5.190089e-02
Photon flux (15-150 keV) in 181.8 sec: 2.44611E-02 2.42623E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16194e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 107.000 sec. to 183.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -9.37167 ( 9.37167 7.86045 )
Epeak [keV] : 29.7337 ( -8.78361 12.0346 )
Norm@50keV : 12.9980 ( -8.03419 163.059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.01 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 55 degrees of freedom
# Null hypothesis probability = 3.775426e-02
Photon flux (15-150 keV) in 181.8 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] : 7.46510 (-2.93482 5.52853)
R^2/D10^2 : 4.05983E-02 (-0.0407767 0.270399)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.09 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.640429e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.030e-08 4.683e-08
25- 50 1.087e-07 8.394e-08
50-150 2.261e-08 2.232e-08
15-150 2.016e-07 1.628e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.3013 (-32.6564 -32.6564)
Norm : 0.174944 (-0.175399 0.528065)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.76 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 57 degrees of freedom
# Null hypothesis probability = 3.518288e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.710e-08 4.661e-08
25- 50 7.976e-08 6.582e-08
50-150 4.802e-08 6.071e-08
15-150 1.949e-07 1.419e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.23723 (-7.43928 192.559)
R1^2/D10^2 : 4.56134E-02 (-0.0222539 -0.0222539)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 4.83102E-07 (-4.89123e-07 -4.89123e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 76.07 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 55 degrees of freedom
# Reduced chi-squared = 1.383 for 55 degrees of freedom
# Null hypothesis probability = 3.137353e-02
# Null hypothesis probability = 3.147240e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.061e-08 5.188e+01
25- 50 1.085e-07 4.248e+02
50-150 2.229e-08 1.139e+04
15-150 2.014e-07 1.193e+04
Plot creation:
Fri Aug 21 16:08:13 EDT 2015