batgrbproduct Analysis for Trigger=519211
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 3 16:09:28 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger519211/GCN5_download_cron
======================================================================
Trigger: 00519211 Segment: 000
BAT Trigger Time: 355107931.648 [s; MET]
Trigger Stop: 355107932.672 [s; MET]
UTC: 2012-04-03T01:05:23.587920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 42.4589551294051 Dec: 40.4659032923946 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.42
Image Trigger?: NO
Rate S/N Ratio: 9.38083151964686 [ if not an image trigger ]
Image S/N Ratio: 7.42
Flight Position: [ source = BAT ]
RA: 42.4589551294051 Dec: 40.4659032923946 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 42.4576566057769 Dec: 40.4893835624465 [deg; J2000]
{ 02h 49m 49.8s , +40d 29' 21.8" }
+/- 2.28691872305166 [arcmin] (estimated 90% radius based on SNR)
+/- 0.814899327751189 [arcmin] (formal 1-sigma fit error)
SNR: 9.33045991230224
Angular difference between Flight and Ground position is 1.410062 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 1.24799996614456 +/- 0.191708124385204
Measured from: 0.052000105381012
to: 1.30000007152557 [s; relative to TRIGTIME]
T50: 0.74399995803833 +/- 0.281822648654789
Measured from: 0.236000120639801
to: 0.980000078678131 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0400000214576721
to: 1.04000002145767 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.40399998426437 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.052622 0.055156 0.050694 0.006334
0.009736 0.009899 0.008902 0.007319 [error]
Peak 0.037962 0.049237 0.038085 0.003421
0.008209 0.008457 0.007750 0.006201 [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 1.55e-08 2.63e-08 3.38e-08 8.74e-08 9.96e-08 1.63e-07 erg/cm2
Error 4.22e-09 4.69e-09 8.30e-09 4.40e-08 2.00e-08 5.17e-08 erg/cm2
Peak flux Power-law 4.07e-01 3.68e-01 2.29e-01 2.18e-01 1.10e+00 1.22e+00 ph/cm2/s
Error 1.17e-01 7.16e-02 6.05e-02 1.10e-01 2.12e-01 2.38e-01 ph/cm2/s
Fluence Cutoff-PL 1.40e-08 2.87e-08 3.52e-08 3.11e-08 1.09e-07 0.00e+00 erg/cm2
Error 4.85e-09 5.95e-09 9.47e-09 5.90e-08 6.11e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.49e-01 4.11e-01 2.46e-01 8.04e-02 1.06e+00 1.09e+00 ph/cm2/s
Error 1.34e-01 8.87e-02 7.21e-02 1.25e-01 2.13e-01 2.36e-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 1.10e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.35e-01 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 1.638 0.297 - - 7.62e-03 1.44e-03 48.470 57
CPL 0.865 1.166 70.8 -26.3 1.94e-02 4.87e-02 46.950 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.682 0.316 - - 8.30e-03 1.74e-03 57.300 57
CPL 0.655 1.275 62.5 -21.4 2.89e-02 8.20e-02 54.770 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 1.404 0.000 1.404
T90 1.248 0.052 1.300
T50 0.744 0.236 0.980
Peak 1.000 0.040 1.040
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
42.4577 +40.4894 0.0206 33.3 -48.7 0.1695 9.3 TRIG_00519211
------------------------------------------
Foreground time interval of the image:
0.000 1.404 (delta_t = 1.404 [sec])
Background time interval of the image:
-162.247 -57.498 (delta_t = 104.750 [sec])
-56.648 0.000 (delta_t = 56.648 [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
Time interval is from 0.000 sec. to 1.404 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63762 ( -0.2907 0.302491 )
Norm@50keV : 7.62175E-03 ( -0.00144975 0.00142537 )
------------------------------------------------------------
# Chi-Squared = 48.47 using 59 PHA bins.
# Reduced chi-squared = 0.8503 for 57 degrees of freedom
# Null hypothesis probability = 7.821866e-01
Photon flux (15-150 keV) in 1.404 sec: 0.991191 ( -0.176427 0.176663 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.965e-08 ( -1.98408e-08 2.02232e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.865008 ( -1.36896 0.962796 )
Epeak [keV] : 70.7573 ( -18.1102 -70.7596 )
Norm@50keV : 1.93589E-02 ( -0.0193575 0.0780407 )
------------------------------------------------------------
# Chi-Squared = 46.95 using 59 PHA bins.
# Reduced chi-squared = 0.8384 for 56 degrees of freedom
# Null hypothesis probability = 8.002169e-01
Photon flux (15-150 keV) in 1.404 sec: 0.966403 ( -0.179989 0.179997 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08994e-07 ( -3.23657e-08 8.9914e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.404 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.864786 ( 0.989218 1.50507 )
beta : -10.00000 ( 1.98054e+11 1.98054e+11 )
Epeak [keV] : 70.7356 ( -24.4241 -70.7475 )
Norm@50keV : 1.93636E-02 ( -0.0193567 0.0781209 )
------------------------------------------------------------
# Chi-Squared = 46.95 using 59 PHA bins.
# Reduced chi-squared = 0.8536 for 55 degrees of freedom
# Null hypothesis probability = 7.716633e-01
Photon flux (15-150 keV) in 1.404 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] : 13.8840 (-2.98504 3.66444)
R^2/D10^2 : 0.146769 (-0.083166 0.201334)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9381 for 57 degrees of freedom
# Null hypothesis probability = 6.082879e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.397e-09 2.861e-09
25- 50 3.097e-08 9.316e-09
50-150 3.914e-08 1.493e-08
15-150 7.851e-08 2.346e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 145.879 (-27.2608 -100.878)
Norm : 4.15549 (-0.790645 1.02364)
------------------------------------------------------------
# Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8302 for 57 degrees of freedom
# Null hypothesis probability = 8.160219e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.502e-08 3.384e-09
25- 50 2.772e-08 5.707e-09
50-150 5.409e-08 1.160e-08
15-150 9.684e-08 1.798e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.02994 (-2.7559 3.93747)
R1^2/D10^2 : 1.69895 (-1.36619 17.3567)
kT2 [keV] : 21.0338 (-6.29633 16.6972)
R2^2/D10^2 : 2.63551E-02 (-0.0233413 0.077929)
------------------------------------------------------------
# Chi-Squared = 46.03 using 59 PHA bins.
# Reduced chi-squared = 0.8369 for 55 degrees of freedom
# Null hypothesis probability = 8.001064e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.470e-08 8.094e-09
25- 50 2.760e-08 1.457e-08
50-150 5.354e-08 3.372e-08
15-150 9.584e-08 5.098e-08
Peak spectrum fit
Power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68216 ( -0.30723 0.324396 )
Norm@50keV : 8.30118E-03 ( -0.00175559 0.00172128 )
------------------------------------------------------------
# Chi-Squared = 57.30 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.638028e-01
Photon flux (15-150 keV) in 1 sec: 1.09570 ( -0.211495 0.211713 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.69759e-08 ( -1.6779e-08 1.71863e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.654938 ( -1.44474 1.10564 )
Epeak [keV] : 62.5102 ( -19.8083 -62.5391 )
Norm@50keV : 2.89203E-02 ( -0.0288627 0.135207 )
------------------------------------------------------------
# Chi-Squared = 54.77 using 59 PHA bins.
# Reduced chi-squared = 0.9781 for 56 degrees of freedom
# Null hypothesis probability = 5.214261e-01
Photon flux (15-150 keV) in 1 sec: 1.06453 ( -0.212878 0.21374 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.93228e-08 ( -2.26331e-08 5.37972e-08 ) ergs/cm2
Band function
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.654995 ( -7.09987 1.77095 )
beta : -10.00000 ( 2.71035e+11 2.71035e+11 )
Epeak [keV] : 62.5006 ( -19.8265 -62.527 )
Norm@50keV : 2.89182E-02 ( -0.0288767 0.135365 )
------------------------------------------------------------
# Chi-Squared = 54.77 using 59 PHA bins.
# Reduced chi-squared = 0.9959 for 55 degrees of freedom
# Null hypothesis probability = 4.832976e-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] : 13.5301 (-3.28272 3.97672)
R^2/D10^2 : 0.178900 (-0.106326 0.302392)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 60.07 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.651463e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.936e-09 2.761e-09
25- 50 2.492e-08 9.538e-09
50-150 2.950e-08 1.217e-08
15-150 6.135e-08 1.760e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.527 (-36.1847 -100.403)
Norm : 4.75206 (-1.00687 1.31301)
------------------------------------------------------------
# Chi-Squared = 55.58 using 59 PHA bins.
# Reduced chi-squared = 0.9750 for 57 degrees of freedom
# Null hypothesis probability = 5.286083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.237e-08 2.887e-09
25- 50 2.220e-08 4.665e-09
50-150 4.003e-08 9.615e-09
15-150 7.460e-08 1.553e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.14198 (-2.39387 3.384)
R1^2/D10^2 : 1.81596 (-1.43557 9.93035)
kT2 [keV] : 20.6635 (-6.01147 12.2667)
R2^2/D10^2 : 3.03043E-02 (-0.025544 0.0866676)
------------------------------------------------------------
# Chi-Squared = 53.09 using 59 PHA bins.
# Reduced chi-squared = 0.9654 for 55 degrees of freedom
# Null hypothesis probability = 5.477604e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.187e-08 6.820e-09
25- 50 2.239e-08 1.199e-08
50-150 4.079e-08 2.426e-08
15-150 7.505e-08 4.005e-08
Plot creation:
Tue Apr 3 16:24:37 EDT 2012