batgrbproduct Analysis for Trigger=578175
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 Nov 20 11:38:05 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger578175/GCN5_download_cron
======================================================================
Trigger: 00578175 Segment: 000
BAT Trigger Time: 406585632 [s; MET]
Trigger Stop: 406585696 [s; MET]
UTC: 2013-11-19T20:27:00.706100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.6970866904 Dec: -40.3915219264061 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.3
Flight Position: [ source = BAT ]
RA: 135.6970866904 Dec: -40.3915219264061 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.654206298085 Dec: -40.4134031838084 [deg; J2000]
{ 09h 02m 37.0s , -40d 24' 48.3" }
+/- 2.69489136464638 [arcmin] (estimated 90% radius based on SNR)
+/- 1.12894518186055 [arcmin] (formal 1-sigma fit error)
SNR: 7.38005219174493
Angular difference between Flight and Ground position is 2.358438 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 128 +/- 144.886162210199
Measured from: 36.0000001192093
to: 164.000000119209 [s; relative to TRIGTIME]
T50: 128 +/- 144.886162210199
Measured from: 36.0000001192093
to: 164.000000119209 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 43.5
to: 44.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 36
to: 164 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.079247 0.686638 -0.000001 -0.026840
0.061841 0.062085 0.053359 0.047893 [error]
Peak 0.017883 0.005131 0.005670 -0.002675
0.005426 0.005577 0.004904 0.004292 [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 3.53e-07 2.38e-07 1.04e-07 6.31e-08 7.26e-07 7.58e-07 erg/cm2
Error 3.76e-08 3.20e-08 2.95e-08 3.16e-08 8.31e-08 9.67e-08 erg/cm2
Peak flux Power-law 1.30e-01 6.99e-02 2.34e-02 1.01e-02 2.29e-01 2.34e-01 ph/cm2/s
Error 7.51e-02 4.59e-02 2.90e-02 2.66e-02 1.24e-01 1.28e-01 ph/cm2/s
Fluence Cutoff-PL 3.35e-07 2.73e-07 1.49e-08 7.54e-12 6.23e-07 6.23e-07 erg/cm2
Error 4.30e-08 4.25e-08 1.82e-08 1.38e-10 6.61e-08 6.61e-08 erg/cm2
Peak flux Cutoff-PL 1.33e-01 8.43e-02 1.52e-03 3.09e-08 2.18e-01 2.19e-01 ph/cm2/s
Error 6.53e-02 6.76e-02 2.65e-02 2.09e-02 1.19e-01 1.19e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.189 0.249 - - 4.33e-04 9.29e-05 86.450 57
CPL 1.000 0.000 50.0 0.0 2.23e-03 0.00e+00 190.160 56
The chi2 of BB fit is 62.45 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.579 1.350 - - 1.11e-03 1.12e-03 56.860 57
CPL -6.443 0.000 25.0 35.8 4.39e+03 0.00e+00 56.090 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 128.000 36.000 164.000
T90 128.000 36.000 164.000
T50 128.000 36.000 164.000
Peak 1.000 43.500 44.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.6542 -40.4134 0.0260 18.3 -141.9 0.5160 7.4 TRIG_00578175
------------------------------------------
Foreground time interval of the image:
36.000 72.501 (delta_t = 36.501 [sec])
Background time interval of the image:
-60.000 36.000 (delta_t = 96.000 [sec])
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
36.000000 142.240000
143.000000 164.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18874 ( -0.238022 0.259381 )
Norm@50keV : 4.33164E-04 ( -9.01538e-05 9.56726e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.45 using 59 PHA bins.
# Reduced chi-squared = 1.517 for 57 degrees of freedom
# Null hypothesis probability = 7.155020e-03
Photon flux (15-150 keV) in 127.2 sec: 0.137105 ( -0.0130356 0.0130388 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26357e-07 ( -8.15194e-08 8.46618e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
36.000000 142.240000
143.000000 164.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.23383E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 190.16 using 59 PHA bins.
# Reduced chi-squared = 3.3957 for 56 degrees of freedom
# Null hypothesis probability = 1.664407e-16
Photon flux (15-150 keV) in 127.2 sec: 0.128348 ( -0.01316 0.013108 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.22703e-07 ( -6.48275e-08 6.74592e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
36.000000 142.240000
143.000000 164.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.90416 ( -2.05295 -1.83593 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 21.5282 ( -2.08155 2.39108 )
Norm@50keV : 1.82624 ( -1.82594 132.809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.242763e-01
Photon flux (15-150 keV) in 127.2 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] : 5.46642 (-0.449156 0.480787)
R^2/D10^2 : 0.773898 (-0.252187 0.386607)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.45 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.886383e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.376e-07 4.935e-08
25- 50 2.730e-07 4.516e-08
50-150 1.679e-08 7.652e-09
15-150 6.274e-07 8.173e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.0441 (-2.61552 3.12843)
Norm : 2.22895 (-0.504869 0.686013)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.49 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.080967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.555e-07 4.764e-08
25- 50 2.583e-07 3.733e-08
50-150 5.200e-08 2.300e-08
15-150 6.658e-07 7.956e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.07357 (-5.4712 194.471)
R1^2/D10^2 : 1.48770E+04 ( )
kT2 [keV] : 5.59889 (-0.502712 0.477509)
R2^2/D10^2 : 0.678695 (-0.679501 0.19543)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.45 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.39 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 55 degrees of freedom
# Reduced chi-squared = 1.116 for 55 degrees of freedom
# Null hypothesis probability = 2.284771e-01
# Null hypothesis probability = 2.576831e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.376e-07 3.849e+00
25- 50 2.733e-07 3.666e+01
50-150 1.685e-08 8.503e+02
15-150 6.277e-07 8.910e+02
Peak spectrum fit
Power-law model
Time interval is from 43.500 sec. to 44.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57893 ( -0.99067 1.71027 )
Norm@50keV : 1.11145E-03 ( -0.00111105 0.00112063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.86 using 59 PHA bins.
# Reduced chi-squared = 0.9976 for 57 degrees of freedom
# Null hypothesis probability = 4.801304e-01
Photon flux (15-150 keV) in 1 sec: 0.229324 ( -0.122352 0.124688 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13639e-08 ( -7.17518e-09 9.18962e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 43.500 sec. to 44.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.44257 ( )
Epeak [keV] : 24.9874 ( -7.30461 64.3909 )
Norm@50keV : 4385.22 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.09 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 56 degrees of freedom
# Null hypothesis probability = 4.714521e-01
Photon flux (15-150 keV) in 1 sec: 0.218426 ( -0.112687 0.12489 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.61293e-09 ( -4.60844e-09 1.03536e-08 ) ergs/cm2
Band function
Time interval is from 43.500 sec. to 44.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.49884 ( -6.67477 0.582792 )
beta : -4.37644 ( 8.72486 18.7247 )
Epeak [keV] : 24.6632 ( -13.0943 -21.9836 )
Norm@50keV : 5.08011 ( -5.09304 194.988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.94 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Null hypothesis probability = 4.394642e-01
Photon flux (15-150 keV) in 1 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] : 6.18349 (-2.5671 4.56917)
R^2/D10^2 : 0.787893 (-0.787893 7.30353)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.15 using 59 PHA bins.
# Reduced chi-squared = 0.9851 for 57 degrees of freedom
# Null hypothesis probability = 5.069627e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.175e-09 2.893e-09
25- 50 4.442e-09 3.068e-09
50-150 4.595e-10 4.521e-10
15-150 9.076e-09 6.370e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.0666 (-26.0624 107.01)
Norm : 2.15834 (-2.15858 7.36787)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.39 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 57 degrees of freedom
# Null hypothesis probability = 4.980952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.059e-09 2.571e-09
25- 50 4.271e-09 2.966e-09
50-150 1.929e-09 2.128e-09
15-150 1.026e-08 7.370e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.62944 (-5.62636 4.97527)
R1^2/D10^2 : 1.02076 (-1.02812 -1.02812)
kT2 [keV] : 13.9738 (-14.3926 -14.3926)
R2^2/D10^2 : 6.74976E-03 (-0.00602339 -0.00602339)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.05 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.352549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.178e-09 3.350e-09
25- 50 4.407e-09 3.721e-09
50-150 1.564e-09 1.824e-09
15-150 1.015e-08 1.037e-08
Plot creation:
Wed Nov 20 11:46:41 EST 2013