batgrbproduct Analysis for Trigger=512035
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): Fri Jan 20 10:51:29 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger512035/batgroup_hand_proc
======================================================================
Trigger: 00512035 Segment: 000
BAT Trigger Time: 348638678.016 [s; MET]
Trigger Stop: 348638679.04 [s; MET]
UTC: 2012-01-19T04:04:30.217780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 120.027125198109 Dec: -9.07399060735125 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.49
Image Trigger?: NO
Rate S/N Ratio: 45.4642716866772 [ if not an image trigger ]
Image S/N Ratio: 15.49
Flight Position: [ source = BAT ]
RA: 120.027125198109 Dec: -9.07399060735125 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 120.028703910441 Dec: -9.07646802953659 [deg; J2000]
{ 08h 00m 06.9s , -09d 04' 35.3" }
+/- 0.443131100452015 [arcmin] (estimated 90% radius based on SNR)
+/- 0.107002707902137 [arcmin] (formal 1-sigma fit error)
SNR: 97.2909255997564
Angular difference between Flight and Ground position is 0.175626 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 253.843999922276 +/- 24.4826720940004
Measured from: 0.132000148296356
to: 253.976000070572 [s; relative to TRIGTIME]
T50: 25.2719999551773 +/- 1.08595396114645
Measured from: 9.24400013685226
to: 34.5160000920296 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.21200001239777
to: 10.2120000123978 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.2159999608994
to: 361.888000011444 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.826048 10.206457 8.174685 1.796496
0.126224 0.140081 0.128755 0.132186 [error]
Peak 0.283816 0.474759 0.456772 0.134452
0.009575 0.011629 0.011840 0.008732 [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 2.02e-06 4.01e-06 6.17e-06 2.08e-05 1.72e-05 3.30e-05 erg/cm2
Error 8.56e-08 9.59e-08 1.43e-07 1.16e-06 3.54e-07 1.22e-06 erg/cm2
Peak flux Power-law 2.53e+00 3.19e+00 2.94e+00 4.73e+00 1.03e+01 1.34e+01 ph/cm2/s
Error 1.50e-01 1.13e-01 9.62e-02 3.42e-01 3.04e-01 4.17e-01 ph/cm2/s
Fluence Cutoff-PL 1.94e-06 4.04e-06 6.25e-06 1.66e-05 1.70e-05 2.89e-05 erg/cm2
Error 1.15e-07 1.01e-07 1.62e-07 3.39e-06 4.04e-07 3.34e-06 erg/cm2
Peak flux Cutoff-PL 2.36e+00 3.23e+00 3.02e+00 3.62e+00 1.01e+01 1.22e+01 ph/cm2/s
Error 1.97e-01 1.19e-01 1.18e-01 7.78e-01 3.23e-01 8.54e-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 1.377 0.039 - - 4.74e-03 9.22e-05 51.180 57
CPL 1.210 0.155 266.0 949.1 5.62e-03 7.04e-04 47.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.119 0.053 - - 8.83e-02 2.54e-03 52.290 57
CPL 0.859 0.215 249.6 391.5 1.15e-01 2.52e-02 47.780 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: 282.112000 sec.
T50 in the 50-300 keV band: 33.088000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 375.104 -13.216 361.888
T90 253.844 0.132 253.976
T50 25.272 9.244 34.516
Peak 1.000 9.212 10.212
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
120.0287 -9.0765 0.0020 5.1 -12.5 10.6721 97.3 TRIG_00512035
------------------------------------------
Foreground time interval of the image:
-13.216 11.785 (delta_t = 25.001 [sec])
Background time interval of the image:
-239.016 -13.216 (delta_t = 225.800 [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 -13.216 sec. to 361.888 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37723 ( -0.0385813 0.0385179 )
Norm@50keV : 4.73656E-03 ( -9.22474e-05 9.22345e-05 )
------------------------------------------------------------
# Chi-Squared = 51.18 using 59 PHA bins.
# Reduced chi-squared = 0.8979 for 57 degrees of freedom
# Null hypothesis probability = 6.920639e-01
Photon flux (15-150 keV) in 375.1 sec: 0.573914 ( -0.0125031 0.0125415 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72493e-05 ( -3.53548e-07 3.53988e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.216 sec. to 361.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21030 ( -0.159941 0.149296 )
Epeak [keV] : 266.004 ( -102.094 1796.13 )
Norm@50keV : 5.61725E-03 ( -0.000438127 0.000969224 )
------------------------------------------------------------
# Chi-Squared = 47.79 using 59 PHA bins.
# Reduced chi-squared = 0.8533 for 56 degrees of freedom
# Null hypothesis probability = 7.744916e-01
Photon flux (15-150 keV) in 375.1 sec: 0.565999 ( -0.014285 0.014348 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70459e-05 ( -4.04808e-07 4.0312e-07 ) ergs/cm2
Band function
Time interval is from -13.216 sec. to 361.888 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.644899 ( -0.569743 3.48771 )
beta : -1.43948 ( -0.111167 0.0607259 )
Epeak [keV] : 70.5204 ( -39.2113 113.772 )
Norm@50keV : 1.24712E-02 ( -0.00712884 5.33279 )
------------------------------------------------------------
# Chi-Squared = 44.71 using 59 PHA bins.
# Reduced chi-squared = 0.8129 for 55 degrees of freedom
# Null hypothesis probability = 8.377593e-01
Photon flux (15-150 keV) in 375.1 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] : 18.0705 ( )
R^2/D10^2 : 3.37700E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 495.09 using 59 PHA bins.
# Reduced chi-squared = 8.6858 for 57 degrees of freedom
# Null hypothesis probability = 4.080840e-71
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.271e-07 3.395e-08
25- 50 3.837e-06 9.734e-08
50-150 9.103e-06 3.207e-07
15-150 1.377e-05 3.095e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.40891 ( )
------------------------------------------------------------
# Chi-Squared = 128.04 using 59 PHA bins.
# Reduced chi-squared = 2.2463 for 57 degrees of freedom
# Null hypothesis probability = 2.223618e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.250e-06 1.138e-06
25- 50 4.328e-06 2.194e-06
50-150 9.493e-06 4.794e-06
15-150 1.607e-05 8.128e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.32793 (-0.691518 0.733739)
R1^2/D10^2 : 0.294765 (-0.068349 0.0961696)
kT2 [keV] : 31.5172 (-2.73979 3.61099)
R2^2/D10^2 : 4.21145E-03 (-0.0012833 0.00156424)
------------------------------------------------------------
# Chi-Squared = 54.73 using 59 PHA bins.
# Reduced chi-squared = 0.9950 for 55 degrees of freedom
# Null hypothesis probability = 4.850565e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.664e-06 1.213e-07
25- 50 4.171e-06 1.594e-07
50-150 1.109e-05 6.883e-07
15-150 1.693e-05 7.183e-07
Peak spectrum fit
Power-law model
Time interval is from 9.212 sec. to 10.212 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11950 ( -0.0526064 0.0525072 )
Norm@50keV : 8.83159E-02 ( -0.00253768 0.00253727 )
------------------------------------------------------------
# Chi-Squared = 52.29 using 59 PHA bins.
# Reduced chi-squared = 0.9174 for 57 degrees of freedom
# Null hypothesis probability = 6.521160e-01
Photon flux (15-150 keV) in 1 sec: 10.2643 ( -0.304193 0.304511 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.17703e-07 ( -2.93577e-08 2.94201e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.212 sec. to 10.212 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.859046 ( -0.220518 0.210156 )
Epeak [keV] : 249.616 ( -88.2598 694.826 )
Norm@50keV : 0.115418 ( -0.0219254 0.0284517 )
------------------------------------------------------------
# Chi-Squared = 47.78 using 59 PHA bins.
# Reduced chi-squared = 0.8533 for 56 degrees of freedom
# Null hypothesis probability = 7.746233e-01
Photon flux (15-150 keV) in 1 sec: 10.1232 ( -0.32289 0.3234 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.04818e-07 ( -3.1661e-08 3.151e-08 ) ergs/cm2
Band function
Time interval is from 9.212 sec. to 10.212 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.608717 ( -0.428805 1.515 )
beta : -1.22975 ( 1.22964 0.10493 )
Epeak [keV] : 123.591 ( -81.4472 589.013 )
Norm@50keV : 0.162449 ( -0.0707394 0.461464 )
------------------------------------------------------------
# Chi-Squared = 47.49 using 59 PHA bins.
# Reduced chi-squared = 0.8635 for 55 degrees of freedom
# Null hypothesis probability = 7.539329e-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] : 20.2573 ( )
R^2/D10^2 : 0.460609 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 231.21 using 59 PHA bins.
# Reduced chi-squared = 4.0564 for 57 degrees of freedom
# Null hypothesis probability = 7.631762e-23
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.625e-08 2.000e-09
25- 50 1.821e-07 7.750e-09
50-150 5.549e-07 2.670e-08
15-150 7.732e-07 2.870e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 42.3405 ( )
------------------------------------------------------------
# Chi-Squared = 235.93 using 59 PHA bins.
# Reduced chi-squared = 4.1391 for 57 degrees of freedom
# Null hypothesis probability = 1.251413e-23
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.054e-07 5.390e-08
25- 50 2.028e-07 1.035e-07
50-150 4.448e-07 2.264e-07
15-150 7.531e-07 3.840e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.70001 (-1.22825 1.35974)
R1^2/D10^2 : 3.78710 (-1.26305 2.21568)
kT2 [keV] : 33.5037 (-3.97359 6.11037)
R2^2/D10^2 : 7.68069E-02 (-0.0321499 0.0408953)
------------------------------------------------------------
# Chi-Squared = 52.84 using 59 PHA bins.
# Reduced chi-squared = 0.9608 for 55 degrees of freedom
# Null hypothesis probability = 5.574623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.735e-08 7.190e-09
25- 50 1.913e-07 1.490e-08
50-150 6.474e-07 5.445e-08
15-150 9.060e-07 8.040e-08
Plot creation:
Fri Jan 20 17:30:04 EST 2012