batgrbproduct Analysis for Trigger=533938
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 Sep 18 01:36:09 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger533938/GCN5_download_cron
======================================================================
Trigger: 00533938 Segment: 000
BAT Trigger Time: 369590952 [s; MET]
Trigger Stop: 369591016 [s; MET]
UTC: 2012-09-17T16:09:02.339820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.301362111394 Dec: -26.404728366895 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 16.54
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.54
Flight Position: [ source = BAT ]
RA: 266.301362111394 Dec: -26.404728366895 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.294547804275 Dec: -26.4110899748865 [deg; J2000]
{ 17h 45m 10.7s , -26d 24' 39.9" }
+/- 1.55653833545798 [arcmin] (estimated 90% radius based on SNR)
+/- 0.619915150744231 [arcmin] (formal 1-sigma fit error)
SNR: 16.1660660786147
Angular difference between Flight and Ground position is 0.528952 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.822864 0.858035 0.353734 -0.024861
0.060721 0.060849 0.056731 0.061357 [error]
Peak 0.822864 0.858035 0.353734 -0.024861
0.060721 0.060849 0.056731 0.061357 [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 2.75e-07 3.54e-07 3.33e-07 5.52e-07 1.15e-06 1.51e-06 erg/cm2
Error 3.22e-08 3.06e-08 5.26e-08 1.70e-07 1.20e-07 2.31e-07 erg/cm2
Peak flux Power-law 1.40e-01 1.00e-01 4.70e-02 3.10e-02 3.02e-01 3.18e-01 ph/cm2/s
Error 1.68e-02 8.53e-03 7.17e-03 8.92e-03 2.56e-02 2.72e-02 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.29e-01 1.12e-01 4.22e-02 2.89e-01 2.90e-01 0.00e+00 ph/cm2/s
Error 1.89e-02 1.20e-02 9.42e-03 2.69e-02 2.82e-02 0.00e+00 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 2.97e-01 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 2.089 0.167 - - 1.93e-03 2.21e-04 43.240 57
CPL 0.996 0.889 35.0 10.4 8.88e-03 1.80e-02 37.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.089 0.167 - - 1.93e-03 2.21e-04 43.240 57
CPL 0.996 0.889 35.0 10.4 8.88e-03 1.80e-02 37.270 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.2945 -26.4111 0.0118 28.9 -140.3 2.0450 16.2 TRIG_00533938
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08910 ( -0.163064 0.170607 )
Norm@50keV : 1.93181E-03 ( -0.000222343 0.000219263 )
------------------------------------------------------------
# Chi-Squared = 43.24 using 59 PHA bins.
# Reduced chi-squared = 0.7587 for 57 degrees of freedom
# Null hypothesis probability = 9.108140e-01
Photon flux (15-150 keV) in 64 sec: 0.302299 ( -0.0255532 0.0255575 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14753e-06 ( -1.18482e-07 1.21482e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.996449 ( -0.987911 0.790915 )
Epeak [keV] : 34.9990 ( -12.4337 8.42458 )
Norm@50keV : 8.87935E-03 ( -0.00887965 0.0272117 )
------------------------------------------------------------
# Chi-Squared = 37.27 using 59 PHA bins.
# Reduced chi-squared = 0.6655 for 56 degrees of freedom
# Null hypothesis probability = 9.745760e-01
Photon flux (15-150 keV) in 64 sec: 0.288779 ( -0.026813 0.026981 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.721307 ( -1.08044 0.639446 )
beta : -2.75032 ( 2.74415 0.569949 )
Epeak [keV] : 33.3818 ( -9.86886 9.07379 )
Norm@50keV : 1.38789E-02 ( -0.0174915 197.636 )
------------------------------------------------------------
# Chi-Squared = 36.80 using 59 PHA bins.
# Reduced chi-squared = 0.6691 for 55 degrees of freedom
# Null hypothesis probability = 9.719132e-01
Photon flux (15-150 keV) in 64 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] : 9.01139 (-0.819078 0.910218)
R^2/D10^2 : 0.207581 (-0.0655364 0.0951072)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 51.00 using 59 PHA bins.
# Reduced chi-squared = 0.8947 for 57 degrees of freedom
# Null hypothesis probability = 6.985727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.102e-07 3.178e-08
25- 50 4.476e-07 4.672e-08
50-150 1.714e-07 4.397e-08
15-150 8.292e-07 9.024e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.7155 (-11.3978 17.0188)
Norm : 1.66510 (-0.229908 0.288454)
------------------------------------------------------------
# Chi-Squared = 37.63 using 59 PHA bins.
# Reduced chi-squared = 0.6601 for 57 degrees of freedom
# Null hypothesis probability = 9.777416e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.636e-07 3.091e-08
25- 50 3.856e-07 3.530e-08
50-150 3.932e-07 1.032e-07
15-150 1.042e-06 1.373e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.92318 (-2.30828 1.95918)
R1^2/D10^2 : 0.716341 (-0.412846 3.17255)
kT2 [keV] : 16.0994 (-5.33271 18.1127)
R2^2/D10^2 : 1.31276E-02 (-0.0121327 0.0713899)
------------------------------------------------------------
# Chi-Squared = 37.39 using 59 PHA bins.
# Reduced chi-squared = 0.6798 for 55 degrees of freedom
# Null hypothesis probability = 9.668168e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.547e-07 1.208e-07
25- 50 3.936e-07 1.634e-07
50-150 3.631e-07 1.984e-07
15-150 1.011e-06 4.500e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08910 ( -0.163064 0.170607 )
Norm@50keV : 1.93181E-03 ( -0.000222343 0.000219263 )
------------------------------------------------------------
# Chi-Squared = 43.24 using 59 PHA bins.
# Reduced chi-squared = 0.7587 for 57 degrees of freedom
# Null hypothesis probability = 9.108140e-01
Photon flux (15-150 keV) in 64 sec: 0.302299 ( -0.0255532 0.0255575 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14753e-06 ( -1.18482e-07 1.21482e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.996449 ( -0.987911 0.790915 )
Epeak [keV] : 34.9990 ( -12.4337 8.42458 )
Norm@50keV : 8.87935E-03 ( -0.00887965 0.0272117 )
------------------------------------------------------------
# Chi-Squared = 37.27 using 59 PHA bins.
# Reduced chi-squared = 0.6655 for 56 degrees of freedom
# Null hypothesis probability = 9.745760e-01
Photon flux (15-150 keV) in 64 sec: 0.288779 ( -0.026813 0.026981 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.721307 ( -1.08044 0.639446 )
beta : -2.75032 ( 2.74415 0.569949 )
Epeak [keV] : 33.3818 ( -9.86886 9.07379 )
Norm@50keV : 1.38789E-02 ( -0.0174915 197.632 )
------------------------------------------------------------
# Chi-Squared = 36.80 using 59 PHA bins.
# Reduced chi-squared = 0.6691 for 55 degrees of freedom
# Null hypothesis probability = 9.719132e-01
Photon flux (15-150 keV) in 64 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] : 9.01139 (-0.819078 0.910218)
R^2/D10^2 : 0.207581 (-0.0655364 0.0951072)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 51.00 using 59 PHA bins.
# Reduced chi-squared = 0.8947 for 57 degrees of freedom
# Null hypothesis probability = 6.985727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.102e-07 2.982e-08
25- 50 4.476e-07 4.573e-08
50-150 1.714e-07 4.253e-08
15-150 8.292e-07 9.664e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.7155 (-11.3978 17.0188)
Norm : 1.66510 (-0.229908 0.288454)
------------------------------------------------------------
# Chi-Squared = 37.63 using 59 PHA bins.
# Reduced chi-squared = 0.6601 for 57 degrees of freedom
# Null hypothesis probability = 9.777416e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.636e-07 3.011e-08
25- 50 3.856e-07 3.562e-08
50-150 3.932e-07 9.264e-08
15-150 1.042e-06 1.120e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.92318 (-2.30828 1.95918)
R1^2/D10^2 : 0.716341 (-0.412846 3.17255)
kT2 [keV] : 16.0994 (-5.33271 18.1127)
R2^2/D10^2 : 1.31276E-02 (-0.0121327 0.0713899)
------------------------------------------------------------
# Chi-Squared = 37.39 using 59 PHA bins.
# Reduced chi-squared = 0.6798 for 55 degrees of freedom
# Null hypothesis probability = 9.668168e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.547e-07 1.285e-07
25- 50 3.936e-07 1.731e-07
50-150 3.631e-07 2.061e-07
15-150 1.011e-06 5.060e-07
Plot creation:
Tue Sep 18 01:56:10 EDT 2012