batgrbproduct Analysis for Trigger=642300
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): Wed Jun 3 12:02:18 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger642300/GCN5_download_cron
======================================================================
Trigger: 00642300 Segment: 000
BAT Trigger Time: 454935520 [s; MET]
Trigger Stop: 454935624 [s; MET]
UTC: 2015-06-02T10:58:26.337080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.509624926011 Dec: 36.1900100197011 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 16.57
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.57
Flight Position: [ source = BAT ]
RA: 296.509624926011 Dec: 36.1900100197011 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 296.517273195929 Dec: 36.1895392253338 [deg; J2000]
{ 19h 46m 04.1s , +36d 11' 22.3" }
+/- 1.41437335903873 [arcmin] (estimated 90% radius based on SNR)
+/- 0.62201443791517 [arcmin] (formal 1-sigma fit error)
SNR: 18.5364624217258
Angular difference between Flight and Ground position is 0.371435 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 104 +/-
Measured from: 0
to: 104 [s; relative to TRIGTIME]
T50: 104 +/-
Measured from: 0
to: 104 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 104 second)
Measured from: 0
to: 104 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 104 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.058907 0.871731 0.548456 0.001524
0.062926 0.063265 0.053640 0.044770 [error]
Peak 1.058907 0.871731 0.548456 0.001524
0.062926 0.063265 0.053640 0.044770 [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 2.91e-07 3.84e-07 3.72e-07 6.44e-07 1.26e-06 1.69e-06 erg/cm2
Error 3.16e-08 2.90e-08 4.97e-08 1.70e-07 1.13e-07 2.24e-07 erg/cm2
Peak flux Power-law 9.13e-02 6.67e-02 3.23e-02 2.22e-02 2.01e-01 2.12e-01 ph/cm2/s
Error 1.01e-02 4.99e-03 4.15e-03 5.45e-03 1.51e-02 1.59e-02 ph/cm2/s
Fluence Cutoff-PL 2.78e-07 4.05e-07 3.66e-07 2.90e-07 1.20e-06 1.34e-06 erg/cm2
Error 3.55e-08 3.76e-08 5.43e-08 -------- 1.27e-07 3.28e-07 erg/cm2
Peak flux Cutoff-PL 8.66e-02 7.01e-02 3.21e-02 1.18e-02 1.96e-01 2.01e-01 ph/cm2/s
Error 1.15e-02 6.34e-03 4.49e-03 8.19e-03 1.58e-02 1.86e-02 ph/cm2/s
Fluence Band 2.76e-07 4.01e-07 3.70e-07 3.38e-07 1.22e-06 1.39e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 8.71e-02 6.96e-02 3.23e-02 1.30e-02 1.97e-01 2.02e-01 ph/cm2/s
Error -------- -------- -------- -------- -------- 1.80e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.045 0.147 - - 1.31e-03 1.26e-04 49.090 57
CPL 1.573 0.573 38.5 0.0 2.43e-03 0.00e+00 46.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.045 0.147 - - 1.31e-03 1.26e-04 49.090 57
CPL 1.573 0.573 38.5 0.0 2.43e-03 0.00e+00 46.850 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 104.000 0.000 104.000
T90 104.000 0.000 104.000
T50 104.000 0.000 104.000
Peak 104.000 0.000 104.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.5173 +36.1895 0.0104 0.0 160.8 2.3881 18.5 TRIG_00642300
------------------------------------------
Foreground time interval of the image:
0.000 104.000 (delta_t = 104.000 [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 104.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04524 ( -0.143735 0.149583 )
Norm@50keV : 1.31052E-03 ( -0.000126855 0.000124698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.09 using 59 PHA bins.
# Reduced chi-squared = 0.8612 for 57 degrees of freedom
# Null hypothesis probability = 7.626748e-01
Photon flux (15-150 keV) in 104 sec: 0.200781 ( -0.0151185 0.0151254 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26046e-06 ( -1.12088e-07 1.13862e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57268 ( -0.608238 0.537004 )
Epeak [keV] : 38.4516 ( )
Norm@50keV : 2.43079E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.85 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.032402e-01
Photon flux (15-150 keV) in 104 sec: 0.196466 ( -0.015835 0.015842 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20322e-06 ( -1.24426e-07 1.29594e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.56958 ( 1.75107 0.809704 )
beta : -10.0000 ( 10 4.26326e-14 )
Epeak [keV] : 38.4254 ( -13.7495 -38.4405 )
Norm@50keV : 2.44165E-03 ( -0.0011158 0.00287658 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.85 using 59 PHA bins.
# Reduced chi-squared = 0.8517 for 55 degrees of freedom
# Null hypothesis probability = 7.749145e-01
Photon flux (15-150 keV) in 104 sec: 0.197226 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21893e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3965 (-0.993803 1.08385)
R^2/D10^2 : 7.75079E-02 (-0.024369 0.0364276)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.95 using 59 PHA bins.
# Reduced chi-squared = 1.578 for 57 degrees of freedom
# Null hypothesis probability = 3.513904e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.796e-07 2.439e-08
25- 50 4.713e-07 4.004e-08
50-150 2.750e-07 5.460e-08
15-150 9.259e-07 8.627e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.6579 (-13.3251 18.7598)
Norm : 1.01598 (-0.124828 0.137408)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8326 for 57 degrees of freedom
# Null hypothesis probability = 8.121235e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.679e-07 2.694e-08
25- 50 4.151e-07 3.416e-08
50-150 4.956e-07 1.000e-07
15-150 1.179e-06 1.076e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.30798 (-0.778933 0.92411)
R1^2/D10^2 : 1.67524 (-0.946058 2.56616)
kT2 [keV] : 15.8207 (-2.16531 2.86273)
R2^2/D10^2 : 1.25614E-02 (-0.00619455 0.0103288)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.29 using 59 PHA bins.
# Reduced chi-squared = 0.7507 for 55 degrees of freedom
# Null hypothesis probability = 9.146868e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.922e-07 1.235e-07
25- 50 3.821e-07 1.007e-07
50-150 4.938e-07 1.655e-07
15-150 1.168e-06 3.322e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04524 ( -0.143735 0.149583 )
Norm@50keV : 1.31052E-03 ( -0.000126855 0.000124698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.09 using 59 PHA bins.
# Reduced chi-squared = 0.8612 for 57 degrees of freedom
# Null hypothesis probability = 7.626748e-01
Photon flux (15-150 keV) in 104 sec: 0.200781 ( -0.0151185 0.0151254 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26046e-06 ( -1.12088e-07 1.13862e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57268 ( -0.608238 0.537004 )
Epeak [keV] : 38.4516 ( )
Norm@50keV : 2.43079E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.85 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.032402e-01
Photon flux (15-150 keV) in 104 sec: 0.196466 ( -0.015835 0.015842 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20322e-06 ( -1.24426e-07 1.29594e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.56958 ( 1.75107 0.809704 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 38.4254 ( -13.4085 -38.4405 )
Norm@50keV : 2.44165E-03 ( -0.0011158 0.00287658 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.85 using 59 PHA bins.
# Reduced chi-squared = 0.8517 for 55 degrees of freedom
# Null hypothesis probability = 7.749145e-01
Photon flux (15-150 keV) in 104 sec: 0.197226 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21893e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3965 (-0.993803 1.08385)
R^2/D10^2 : 7.75079E-02 (-0.024369 0.0364276)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.95 using 59 PHA bins.
# Reduced chi-squared = 1.578 for 57 degrees of freedom
# Null hypothesis probability = 3.513904e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.796e-07 2.350e-08
25- 50 4.713e-07 4.706e-08
50-150 2.750e-07 5.210e-08
15-150 9.259e-07 8.606e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.6579 (-13.3251 18.7598)
Norm : 1.01598 (-0.124828 0.137408)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8326 for 57 degrees of freedom
# Null hypothesis probability = 8.121235e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.679e-07 2.798e-08
25- 50 4.151e-07 3.567e-08
50-150 4.956e-07 9.407e-08
15-150 1.179e-06 1.167e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.30798 (-0.778933 0.92411)
R1^2/D10^2 : 1.67524 (-0.946058 2.56616)
kT2 [keV] : 15.8207 (-2.16531 2.86273)
R2^2/D10^2 : 1.25614E-02 (-0.00619455 0.0103288)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.29 using 59 PHA bins.
# Reduced chi-squared = 0.7507 for 55 degrees of freedom
# Null hypothesis probability = 9.146868e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.922e-07 1.260e-07
25- 50 3.821e-07 1.020e-07
50-150 4.938e-07 1.605e-07
15-150 1.168e-06 3.060e-07
Plot creation:
Wed Jun 3 12:05:50 EDT 2015