batgrbproduct Analysis for Trigger=533836
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 Sep 16 15:37:02 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger533836/GCN5_download_cron
======================================================================
Trigger: 00533836 Segment: 000
BAT Trigger Time: 369479776 [s; MET]
Trigger Stop: 369480728 [s; MET]
UTC: 2012-09-16T09:16:06.344500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.322413608571 Dec: -26.399810597714 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.49
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.49
Flight Position: [ source = BAT ]
RA: 266.322413608571 Dec: -26.399810597714 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.28373570199 Dec: -26.4329440835889 [deg; J2000]
{ 17h 45m 08.1s , -26d 25' 58.6" }
+/- 3.45130823234765 [arcmin] (estimated 90% radius based on SNR)
+/- 2.50823042510099 [arcmin] (formal 1-sigma fit error)
SNR: 5.18286825454387
Angular difference between Flight and Ground position is 2.876067 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 952 +/-
Measured from: 0
to: 952 [s; relative to TRIGTIME]
T50: 952 +/-
Measured from: 0
to: 952 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 952 second)
Measured from: 0
to: 952 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 952 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.216513 2.362875 1.622847 0.484794
0.288247 0.241646 0.203086 0.180304 [error]
Peak 2.216513 2.362875 1.622847 0.484794
0.288247 0.241646 0.203086 0.180304 [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 6.80e-07 1.10e-06 1.36e-06 3.29e-06 4.07e-06 6.43e-06 erg/cm2
Error 1.32e-07 1.23e-07 2.12e-07 1.15e-06 4.87e-07 1.30e-06 erg/cm2
Peak flux Power-law 2.55e-02 2.28e-02 1.40e-02 1.31e-02 6.78e-02 7.53e-02 ph/cm2/s
Error 5.05e-03 2.60e-03 2.11e-03 4.20e-03 7.61e-03 8.00e-03 ph/cm2/s
Fluence Cutoff-PL 6.84e-07 1.10e-06 1.36e-06 3.26e-06 6.40e-06 0.00e+00 erg/cm2
Error 1.32e-07 1.22e-07 2.13e-07 1.15e-06 1.32e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.55e-02 2.28e-02 1.40e-02 1.30e-02 6.78e-02 7.52e-02 ph/cm2/s
Error 5.00e-03 2.59e-03 2.11e-03 5.10e-03 3.86e-03 7.99e-03 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 1.702 0.215 - - 5.10e-04 5.77e-05 69.990 57
CPL 1.705 0.216 9999.4 0.0 5.11e-04 0.00e+00 69.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.702 0.215 - - 5.10e-04 5.77e-05 69.990 57
CPL 1.705 0.216 9999.4 0.0 5.11e-04 0.00e+00 69.990 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 952.000 0.000 952.000
T90 952.000 0.000 952.000
T50 952.000 0.000 952.000
Peak 952.000 0.000 952.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.2837 -26.4329 0.0372 28.0 55.5 6.6054 5.2 TRIG_00533836
------------------------------------------
Foreground time interval of the image:
0.000 145.450 (delta_t = 145.450 [sec])
150.000 303.066 (delta_t = 153.066 [sec])
387.000 557.120 (delta_t = 170.120 [sec])
558.000 952.000 (delta_t = 394.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 145.450000
150.000000 303.065700
387.000000 557.120000
558.000000 952.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70247 ( -0.212833 0.21726 )
Norm@50keV : 5.10119E-04 ( -5.81358e-05 5.72828e-05 )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 57 degrees of freedom
# Null hypothesis probability = 1.158818e-01
Photon flux (15-150 keV) in 862.6 sec: 6.78080E-02 ( -0.00758736 0.00762399 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07336e-06 ( -4.84277e-07 4.90282e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 145.450000
150.000000 303.065700
387.000000 557.120000
558.000000 952.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70549 ( -0.217721 0.214495 )
Epeak [keV] : 9999.35 ( )
Norm@50keV : 5.10532E-04 ( )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 56 degrees of freedom
# Null hypothesis probability = 9.893021e-02
Photon flux (15-150 keV) in 862.6 sec: 6.77831E-02 ( -0.0038599 0.00386 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40179e-06 ( -1.17478e-06 1.4653e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 145.450000
150.000000 303.065700
387.000000 557.120000
558.000000 952.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43837 ( 1.43836 1.43836 )
beta : -1.70243 ( -0.217453 0.212849 )
Epeak [keV] : 13.8203 ( -13.8147 -13.8147 )
Norm@50keV : 1.13860E-03 ( -0.000571973 0.0759792 )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.399389e-02
Photon flux (15-150 keV) in 862.6 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] : 13.2995 (-1.84189 2.26376)
R^2/D10^2 : 1.06537E-02 (-0.00464291 0.00783256)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 99.22 using 59 PHA bins.
# Reduced chi-squared = 1.741 for 57 degrees of freedom
# Null hypothesis probability = 4.515330e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.445e-07 7.121e-08
25- 50 1.216e-06 1.824e-07
50-150 1.377e-06 3.299e-07
15-150 2.938e-06 4.227e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.627 (-10.8813 -100.958)
Norm : 0.274706 (-0.0351804 0.04424)
------------------------------------------------------------
# Chi-Squared = 72.55 using 59 PHA bins.
# Reduced chi-squared = 1.273 for 57 degrees of freedom
# Null hypothesis probability = 8.028260e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.091e-07 1.004e-07
25- 50 1.127e-06 1.397e-07
50-150 2.217e-06 3.481e-07
15-150 3.953e-06 4.365e-07
Double BB
R1^2/D10^2 : 5.73786E-02 (-0.699203 12.4008)
kT2 [keV] : 38.4789 ( )
R2^2/D10^2 : 2.16645E-04 ( )
------------------------------------------------------------
# Chi-Squared = 75.27 using 59 PHA bins.
# Chi-Squared = 75.13 using 59 PHA bins.
# Chi-Squared = 75.11 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Reduced chi-squared = 1.366 for 55 degrees of freedom
# Reduced chi-squared = 1.366 for 55 degrees of freedom
# Null hypothesis probability = 3.612125e-02
# Null hypothesis probability = 3.699214e-02
# Null hypothesis probability = 3.708130e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.653e-07 3.714e-07
25- 50 9.569e-07 3.173e-07
50-150 2.098e-06 7.246e-07
15-150 3.821e-06 1.184e-06
Peak spectrum fit
Power-law model
Time interval is from 558.000 sec. to 952.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70247 ( -0.212833 0.21726 )
Norm@50keV : 5.10119E-04 ( -5.81358e-05 5.72828e-05 )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 57 degrees of freedom
# Null hypothesis probability = 1.158818e-01
Photon flux (15-150 keV) in 862.6 sec: 6.78080E-02 ( -0.00758736 0.00762399 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07336e-06 ( -4.84277e-07 4.90282e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 558.000 sec. to 952.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70549 ( -0.217721 0.214495 )
Epeak [keV] : 9999.35 ( )
Norm@50keV : 5.10532E-04 ( )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 56 degrees of freedom
# Null hypothesis probability = 9.893021e-02
Photon flux (15-150 keV) in 862.6 sec: 6.77831E-02 ( -0.0038599 0.00386 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40179e-06 ( -1.17478e-06 1.4653e-06 ) ergs/cm2
Band function
Time interval is from 558.000 sec. to 952.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43837 ( 1.43836 1.43836 )
beta : -1.70243 ( -0.217453 0.212849 )
Epeak [keV] : 13.8203 ( -13.8147 -13.8147 )
Norm@50keV : 1.13860E-03 ( -0.000571973 0.0759792 )
------------------------------------------------------------
# Chi-Squared = 69.99 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.399389e-02
Photon flux (15-150 keV) in 862.6 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] : 13.2995 (-1.84189 2.26376)
R^2/D10^2 : 1.06537E-02 (-0.00464291 0.00783256)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 99.22 using 59 PHA bins.
# Reduced chi-squared = 1.741 for 57 degrees of freedom
# Null hypothesis probability = 4.515330e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.445e-07 7.246e-08
25- 50 1.216e-06 1.915e-07
50-150 1.377e-06 3.248e-07
15-150 2.938e-06 4.425e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.627 (-10.8813 -100.958)
Norm : 0.274706 (-0.0351804 0.04424)
------------------------------------------------------------
# Chi-Squared = 72.55 using 59 PHA bins.
# Reduced chi-squared = 1.273 for 57 degrees of freedom
# Null hypothesis probability = 8.028260e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.091e-07 9.640e-08
25- 50 1.127e-06 1.428e-07
50-150 2.217e-06 3.442e-07
15-150 3.953e-06 4.744e-07
Double BB
R1^2/D10^2 : 5.73786E-02 (-0.699203 12.4008)
kT2 [keV] : 38.4789 ( )
R2^2/D10^2 : 2.16645E-04 ( )
------------------------------------------------------------
# Chi-Squared = 75.27 using 59 PHA bins.
# Chi-Squared = 75.13 using 59 PHA bins.
# Chi-Squared = 75.11 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Reduced chi-squared = 1.366 for 55 degrees of freedom
# Reduced chi-squared = 1.366 for 55 degrees of freedom
# Null hypothesis probability = 3.612125e-02
# Null hypothesis probability = 3.699214e-02
# Null hypothesis probability = 3.708130e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.653e-07 3.783e-07
25- 50 9.569e-07 3.161e-07
50-150 2.098e-06 7.108e-07
15-150 3.821e-06 1.277e-06
Plot creation:
Sun Sep 16 15:53:23 EDT 2012