batgrbproduct Analysis for Trigger=639199
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 Apr 28 17:11:54 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger639199/GCN5_download_cron
======================================================================
Trigger: 00639199 Segment: 000
BAT Trigger Time: 451837096 [s; MET]
Trigger Stop: 451837472 [s; MET]
UTC: 2015-04-27T14:18:02.496900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 250.461368094959 Dec: -45.5329329651203 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.8
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.8
Flight Position: [ source = BAT ]
RA: 250.461368094959 Dec: -45.5329329651203 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 250.472787728549 Dec: -45.4968303616101 [deg; J2000]
{ 16h 41m 53.5s , -45d 29' 48.6" }
+/- 4.1631244142296 [arcmin] (estimated 90% radius based on SNR)
+/- 2.41582866607564 [arcmin] (formal 1-sigma fit error)
SNR: 3.96491185897509
Angular difference between Flight and Ground position is 2.218727 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
T50: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 376 second)
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.699252 0.331129 0.039840 -0.033493
0.133135 0.119946 0.097769 0.080974 [error]
Peak 0.699252 0.331129 0.039840 -0.033493
0.133135 0.119946 0.097769 0.080974 [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 2.11e-07 1.42e-07 6.26e-08 3.81e-08 4.35e-07 4.55e-07 erg/cm2
Error 6.04e-08 6.13e-08 5.55e-08 7.01e-08 1.59e-07 1.91e-07 erg/cm2
Peak flux Power-law 1.88e-02 7.14e-03 1.57e-03 4.14e-04 2.78e-02 2.79e-02 ph/cm2/s
Error 5.46e-03 2.93e-03 1.35e-03 7.09e-04 7.71e-03 7.82e-03 ph/cm2/s
Fluence Cutoff-PL 2.17e-07 1.50e-07 2.74e-08 8.86e-10 3.95e-07 3.95e-07 erg/cm2
Error 6.64e-08 1.13e-07 6.02e-08 5.99e-08 1.59e-07 1.86e-07 erg/cm2
Peak flux Cutoff-PL 1.91e-02 7.64e-03 7.46e-04 1.30e-05 2.75e-02 2.75e-02 ph/cm2/s
Error 5.89e-03 3.92e-03 1.46e-03 6.13e-04 7.53e-03 7.54e-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 3.185 0.782 - - 8.80e-05 5.88e-05 51.170 57
CPL 1.468 0.000 8.4 0.0 1.62e-03 0.00e+00 50.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.185 0.782 - - 8.80e-05 5.88e-05 51.170 57
CPL 1.468 0.000 8.4 0.0 1.62e-03 0.00e+00 50.510 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 376.000 0.000 376.000
T90 376.000 0.000 376.000
T50 376.000 0.000 376.000
Peak 376.000 0.000 376.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.4728 -45.4968 0.0484 18.4 12.0 1.2701 4.0 TRIG_00639199
------------------------------------------
Foreground time interval of the image:
0.000 376.000 (delta_t = 376.000 [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 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18495 ( -0.664933 0.898605 )
Norm@50keV : 8.80004E-05 ( -5.26571e-05 6.48899e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.924882e-01
Photon flux (15-150 keV) in 376 sec: 2.77734E-02 ( -0.00769354 0.00773584 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35337e-07 ( -1.48211e-07 1.69365e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46825 ( )
Epeak [keV] : 8.35188 ( )
Norm@50keV : 1.61539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 56 degrees of freedom
# Null hypothesis probability = 6.820114e-01
Photon flux (15-150 keV) in 376 sec: 2.74719E-02 ( -0.00748 0.0075893 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94902e-07 ( -1.31965e-07 1.86049e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.04476 ( 4.40963 7.04476 )
beta : -3.18496 ( -0.899107 0.665205 )
Epeak [keV] : 29.6025 ( -29.6025 -29.6025 )
Norm@50keV : 1.19604E-02 ( -0.00715633 0.00881993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217697e-01
Photon flux (15-150 keV) in 376 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] : 4.70754 (-1.21258 1.67364)
R^2/D10^2 : 0.315570 (-0.315571 1.08477)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.11 using 59 PHA bins.
# Reduced chi-squared = 0.8967 for 57 degrees of freedom
# Null hypothesis probability = 6.944271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 1.331e-07
25- 50 1.264e-07 8.253e-08
50-150 3.807e-09 3.929e-09
15-150 3.556e-07 2.151e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1599 (-6.67614 13.0909)
Norm : 0.491094 (-0.26748 0.773479)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.155665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.172e-07 1.157e-07
25- 50 1.496e-07 8.961e-08
50-150 2.693e-08 2.621e-08
15-150 3.937e-07 2.347e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84726 (-3.85763 2.15124)
R1^2/D10^2 : 0.678647 (-0.672059 -0.672059)
kT2 [keV] : 10.0949 (-10.1132 -10.1132)
R2^2/D10^2 : 4.06083E-03 (-0.00401534 1.02788)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9123 for 55 degrees of freedom
# Null hypothesis probability = 6.591667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.234e-07 1.251e-07
25- 50 1.419e-07 7.706e-08
50-150 4.355e-08 2.859e-08
15-150 4.088e-07 2.358e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18495 ( -0.664933 0.898605 )
Norm@50keV : 8.80004E-05 ( -5.26571e-05 6.48899e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.924882e-01
Photon flux (15-150 keV) in 376 sec: 2.77734E-02 ( -0.00769354 0.00773584 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35337e-07 ( -1.48211e-07 1.69365e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46825 ( )
Epeak [keV] : 8.35188 ( )
Norm@50keV : 1.61539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 56 degrees of freedom
# Null hypothesis probability = 6.820114e-01
Photon flux (15-150 keV) in 376 sec: 2.74719E-02 ( -0.00748 0.0075893 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94902e-07 ( -1.31965e-07 1.86049e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.04476 ( 4.40963 7.04476 )
beta : -3.18496 ( -0.899107 0.665205 )
Epeak [keV] : 29.6025 ( -29.6025 -29.6025 )
Norm@50keV : 1.19604E-02 ( -0.00715633 0.00881993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217697e-01
Photon flux (15-150 keV) in 376 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] : 4.70754 (-1.21258 1.67364)
R^2/D10^2 : 0.315570 (-0.315571 1.08477)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.11 using 59 PHA bins.
# Reduced chi-squared = 0.8967 for 57 degrees of freedom
# Null hypothesis probability = 6.944271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 1.294e-07
25- 50 1.264e-07 7.979e-08
50-150 3.807e-09 3.903e-09
15-150 3.556e-07 2.134e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1599 (-6.67614 13.0909)
Norm : 0.491094 (-0.26748 0.773479)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.155665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.172e-07 1.043e-07
25- 50 1.496e-07 9.119e-08
50-150 2.693e-08 2.655e-08
15-150 3.937e-07 2.283e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84726 (-3.85763 2.15124)
R1^2/D10^2 : 0.678647 (-0.672059 -0.672059)
kT2 [keV] : 10.0949 (-10.1132 -10.1132)
R2^2/D10^2 : 4.06083E-03 (-0.00401534 1.02788)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9123 for 55 degrees of freedom
# Null hypothesis probability = 6.591667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.234e-07 1.292e-07
25- 50 1.419e-07 8.014e-08
50-150 4.355e-08 2.527e-08
15-150 4.088e-07 2.517e-07
Plot creation:
Tue Apr 28 17:16:37 EDT 2015