batgrbproduct Analysis for Trigger=629206
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): Sun Feb 1 19:41:04 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger629206/GCN5_download_cron
======================================================================
Trigger: 00629206 Segment: 000
BAT Trigger Time: 444431672 [s; MET]
Trigger Stop: 444432872 [s; MET]
UTC: 2015-01-31T21:14:18.874120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.03275566555 Dec: -34.3120529473439 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.24
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.24
Flight Position: [ source = BAT ]
RA: 271.03275566555 Dec: -34.3120529473439 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 271.007626341441 Dec: -34.3706039185975 [deg; J2000]
{ 18h 04m 01.8s , -34d 22' 14.2" }
+/- 5.11387044004034 [arcmin] (estimated 90% radius based on SNR)
+/- 3.95122144438551 [arcmin] (formal 1-sigma fit error)
SNR: 2.95541707808583
Angular difference between Flight and Ground position is 3.727125 arcmin
Partial Coding Fraction: 0.859375 [ including projection effects ]
Duration
T90: 1200 +/-
Measured from: 0
to: 1200 [s; relative to TRIGTIME]
T50: 1200 +/-
Measured from: 0
to: 1200 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1200 second)
Measured from: 0
to: 1200 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1200 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.549997 0.339655 0.018702 0.105477
0.105043 0.094137 0.078814 0.069231 [error]
Peak 0.549997 0.339655 0.018702 0.105477
0.105043 0.094137 0.078814 0.069231 [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 1.48e-07 1.31e-07 7.91e-08 7.24e-08 3.89e-07 4.30e-07 erg/cm2
Error 4.65e-08 4.67e-08 5.65e-08 1.10e-07 1.41e-07 1.98e-07 erg/cm2
Peak flux Power-law 1.83e-02 9.05e-03 2.74e-03 1.05e-03 3.07e-02 3.12e-02 ph/cm2/s
Error 5.87e-03 3.10e-03 1.89e-03 1.49e-03 8.52e-03 8.75e-03 ph/cm2/s
Fluence Cutoff-PL 1.45e-07 1.57e-07 2.23e-08 1.29e-10 3.25e-07 3.25e-07 erg/cm2
Error 5.29e-08 6.42e-08 5.65e-08 6.90e-08 1.00e-07 1.57e-07 erg/cm2
Peak flux Cutoff-PL 1.74e-02 1.12e-02 8.85e-04 2.90e-06 2.95e-02 2.95e-02 ph/cm2/s
Error 6.71e-03 4.34e-03 1.94e-03 9.66e-04 8.16e-03 8.15e-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 2.724 0.676 - - 1.35e-04 7.20e-05 56.910 57
CPL 1.000 0.000 50.0 0.0 5.92e-04 0.00e+00 63.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.724 0.676 - - 1.35e-04 7.20e-05 56.910 57
CPL 1.000 0.000 50.0 0.0 5.92e-04 0.00e+00 63.930 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 1200.000 0.000 1200.000
T90 1200.000 0.000 1200.000
T50 1200.000 0.000 1200.000
Peak 1200.000 0.000 1200.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
271.0076 -34.3706 0.0648 18.2 -122.8 0.7879 3.0 TRIG_00629206
------------------------------------------
Foreground time interval of the image:
231.000 483.054 (delta_t = 252.054 [sec])
489.000 489.200 (delta_t = 0.200 [sec])
541.000 546.813 (delta_t = 5.813 [sec])
601.000 605.531 (delta_t = 4.531 [sec])
661.000 665.974 (delta_t = 4.974 [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
231.000000 483.054300
489.000000 489.200000
541.000000 546.812700
601.000000 605.531100
661.000000 665.973900
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72429 ( -0.591466 0.760772 )
Norm@50keV : 1.35474E-04 ( -6.93292e-05 7.46728e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 0.9984 for 57 degrees of freedom
# Null hypothesis probability = 4.785370e-01
Photon flux (15-150 keV) in 267.6 sec: 3.07282E-02 ( -0.00850695 0.00852529 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88994e-07 ( -1.32714e-07 1.49222e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
231.000000 483.054300
489.000000 489.200000
541.000000 546.812700
601.000000 605.531100
661.000000 665.973900
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.92406E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 56 degrees of freedom
# Null hypothesis probability = 2.179792e-01
Photon flux (15-150 keV) in 267.6 sec: 2.94904E-02 ( -0.0081105 0.0082 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24888e-07 ( -9.48265e-08 1.05983e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
231.000000 483.054300
489.000000 489.200000
541.000000 546.812700
601.000000 605.531100
661.000000 665.973900
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.64953 ( 1.52395 1.52395 )
beta : -10.0000 ( 9.46702 19.4634 )
Epeak [keV] : 24.5716 ( -6.30958 8.59524 )
Norm@50keV : 0.151935 ( -0.0406773 35.7685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.722632e-01
Photon flux (15-150 keV) in 267.6 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] : 6.35508 (-1.4708 1.74422)
R^2/D10^2 : 9.16601E-02 (-0.0916275 0.197065)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.03 using 59 PHA bins.
# Reduced chi-squared = 0.9655 for 57 degrees of freedom
# Null hypothesis probability = 5.492357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-07 8.328e-08
25- 50 1.604e-07 9.955e-08
50-150 1.849e-08 1.586e-08
15-150 3.212e-07 1.939e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.0644 (-9.39687 20.518)
Norm : 0.336348 (-0.160591 0.32891)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
# Reduced chi-squared = 0.9787 for 57 degrees of freedom
# Null hypothesis probability = 5.206534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.510e-07 8.177e-08
25- 50 1.422e-07 8.279e-08
50-150 5.001e-08 4.459e-08
15-150 3.433e-07 1.876e-07
Double BB
R1^2/D10^2 : 1.27420E-06 ( )
kT2 [keV] : 6.21613 (-6.21295 1.68552)
R2^2/D10^2 : 9.90362E-02 (-0.062002 0.177628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.49 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 55 degrees of freedom
# Reduced chi-squared = 0.9906 for 55 degrees of freedom
# Reduced chi-squared = 0.9873 for 55 degrees of freedom
# Null hypothesis probability = 4.828332e-01
# Null hypothesis probability = 4.942485e-01
# Null hypothesis probability = 5.013239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.446e-07 8.266e-08
25- 50 1.588e-07 9.543e-08
50-150 2.333e-08 1.495e-08
15-150 3.267e-07 1.951e-07
Peak spectrum fit
Power-law model
Time interval is from 661.000 sec. to 665.974 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72429 ( -0.591466 0.760772 )
Norm@50keV : 1.35474E-04 ( -6.93292e-05 7.46728e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 0.9984 for 57 degrees of freedom
# Null hypothesis probability = 4.785370e-01
Photon flux (15-150 keV) in 267.6 sec: 3.07282E-02 ( -0.00850695 0.00852529 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88994e-07 ( -1.32714e-07 1.49222e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 661.000 sec. to 665.974 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.92406E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 56 degrees of freedom
# Null hypothesis probability = 2.179792e-01
Photon flux (15-150 keV) in 267.6 sec: 2.94904E-02 ( -0.0081105 0.0082 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24888e-07 ( -9.48265e-08 1.05983e-07 ) ergs/cm2
Band function
Time interval is from 661.000 sec. to 665.974 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.64953 ( 1.52395 1.52395 )
beta : -10.0000 ( 9.46702 19.4634 )
Epeak [keV] : 24.5716 ( -6.30958 8.59524 )
Norm@50keV : 0.151935 ( -0.0406773 35.7685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.722632e-01
Photon flux (15-150 keV) in 267.6 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] : 6.35508 (-1.4708 1.74422)
R^2/D10^2 : 9.16601E-02 (-0.0916275 0.197065)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.03 using 59 PHA bins.
# Reduced chi-squared = 0.9655 for 57 degrees of freedom
# Null hypothesis probability = 5.492357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-07 8.471e-08
25- 50 1.604e-07 9.805e-08
50-150 1.849e-08 1.524e-08
15-150 3.212e-07 1.945e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.0644 (-9.39687 20.518)
Norm : 0.336348 (-0.160591 0.32891)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
# Reduced chi-squared = 0.9787 for 57 degrees of freedom
# Null hypothesis probability = 5.206534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.510e-07 7.176e-08
25- 50 1.422e-07 7.358e-08
50-150 5.001e-08 4.402e-08
15-150 3.433e-07 1.802e-07
Double BB
R1^2/D10^2 : 1.27420E-06 ( )
kT2 [keV] : 6.21613 (-6.21295 1.68552)
R2^2/D10^2 : 9.90362E-02 (-0.062002 0.177628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.49 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 55 degrees of freedom
# Reduced chi-squared = 0.9906 for 55 degrees of freedom
# Reduced chi-squared = 0.9873 for 55 degrees of freedom
# Null hypothesis probability = 4.828332e-01
# Null hypothesis probability = 4.942485e-01
# Null hypothesis probability = 5.013239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.446e-07 8.862e-08
25- 50 1.588e-07 9.786e-08
50-150 2.333e-08 1.687e-08
15-150 3.267e-07 1.875e-07
Plot creation:
Sun Feb 1 19:43:13 EST 2015