batgrbproduct Analysis for Trigger=512003
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): Thu Jan 19 16:30:30 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger512003/batgroup_hand_proc
======================================================================
Trigger: 00512003 Segment: 000
BAT Trigger Time: 348598828.992 [s; MET]
Trigger Stop: 348598830.016 [s; MET]
UTC: 2012-01-18T17:00:21.195400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 124.86615353153 Dec: -7.18171893580232 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: NO
Rate S/N Ratio: 9.32737905308882 [ if not an image trigger ]
Image S/N Ratio: 7.09
Flight Position: [ source = BAT ]
RA: 124.86615353153 Dec: -7.18171893580232 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 124.863541434441 Dec: -7.17888299963453 [deg; J2000]
{ 08h 19m 27.2s , -07d 10' 44.0" }
+/- 1.20082050512762 [arcmin] (estimated 90% radius based on SNR)
+/- 0.365314076812443 [arcmin] (formal 1-sigma fit error)
SNR: 23.4195337090864
Angular difference between Flight and Ground position is 0.230505 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 54.7199999094009 +/- 19.6469605838771
Measured from: 0.552000164985657
to: 55.2720000743866 [s; relative to TRIGTIME]
T50: 12.5159999132156 +/- 2.13266402939563
Measured from: 6.25600016117096
to: 18.7720000743866 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.68800002336502
to: 7.68800002336502 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.4559999704361
to: 80.4679999947548 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.267532 1.416095 0.708142 0.185683
0.068861 0.071052 0.062248 0.054382 [error]
Peak 0.084907 0.100181 0.046156 0.017431
0.010752 0.011453 0.009655 0.007657 [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 4.59e-07 6.09e-07 5.93e-07 1.03e-06 2.00e-06 2.70e-06 erg/cm2
Error 4.23e-08 3.71e-08 6.14e-08 2.15e-07 1.40e-07 2.78e-07 erg/cm2
Peak flux Power-law 9.10e-01 7.24e-01 3.88e-01 3.03e-01 2.16e+00 2.33e+00 ph/cm2/s
Error 1.74e-01 9.61e-02 8.01e-02 1.19e-01 2.88e-01 3.12e-01 ph/cm2/s
Fluence Cutoff-PL 4.38e-07 6.39e-07 5.84e-07 4.89e-07 1.91e-06 2.15e-06 erg/cm2
Error 4.80e-08 4.93e-08 6.79e-08 4.31e-07 1.67e-07 4.49e-07 erg/cm2
Peak flux Cutoff-PL 8.78e-01 7.69e-01 3.87e-01 1.58e-01 2.13e+00 2.19e+00 ph/cm2/s
Error 1.45e-01 1.41e-01 9.22e-02 2.09e-01 2.95e-01 3.72e-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 2.037 0.118 - - 2.64e-03 1.97e-04 60.870 57
CPL 1.599 0.506 39.0 0.0 4.68e-03 0.00e+00 58.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.900 0.235 - - 1.51e-02 2.39e-03 65.650 57
CPL 1.434 1.085 50.7 0.0 2.82e-02 0.00e+00 65.130 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: 16.448000 sec.
T50 in the 50-300 keV band: 6.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 81.924 -1.456 80.468
T90 54.720 0.552 55.272
T50 12.516 6.256 18.772
Peak 1.000 6.688 7.688
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
124.8635 -7.1789 0.0082 35.5768 31.7925 1.6845328 23.420 TRIG_00512003
Foreground time interval of the image:
-1.456 10.209 (delta_t = 11.665 [sec])
Background time interval of the image:
-239.992 -188.772 (delta_t = 51.220 [sec])
-187.992 -1.456 (delta_t = 186.536 [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 -1.456 sec. to 80.468 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03740 ( -0.116745 0.120141 )
Norm@50keV : 2.64267E-03 ( -0.00019856 0.000195922 )
------------------------------------------------------------
# Chi-Squared = 60.87 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 57 degrees of freedom
# Null hypothesis probability = 3.385188e-01
Photon flux (15-150 keV) in 81.92 sec: 0.403374 ( -0.0251072 0.0251354 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00097e-06 ( -1.39767e-07 1.41165e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.456 sec. to 80.468 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59877 ( -0.536087 0.476232 )
Epeak [keV] : 39.0316 ( )
Norm@50keV : 4.67728E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.883725e-01
Photon flux (15-150 keV) in 81.92 sec: 0.394722 ( -0.026724 0.0267 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91363e-06 ( -1.65585e-07 1.68542e-07 ) ergs/cm2
Band function
Time interval is from -1.456 sec. to 80.468 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.59883 ( -4.83265 0.622864 )
beta : -10.00000 ( 1.85698e+11 1.85698e+11 )
Epeak [keV] : 39.0235 ( -37.0839 28.1291 )
Norm@50keV : 4.67601E-03 ( -0.00200026 0.00467282 )
------------------------------------------------------------
# Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 3.526657e-01
Photon flux (15-150 keV) in 81.92 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] : 10.0426 (-0.750581 0.810711)
R^2/D10^2 : 0.177916 (-0.0464661 0.0630595)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 111.50 using 59 PHA bins.
# Reduced chi-squared = 1.9561 for 57 degrees of freedom
# Null hypothesis probability = 2.155500e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.998e-07 3.002e-08
25- 50 7.499e-07 5.206e-08
50-150 3.962e-07 6.513e-08
15-150 1.446e-06 1.098e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.2849 (-11.3942 15.0509)
Norm : 2.02797 (-0.2121 0.242551)
------------------------------------------------------------
# Chi-Squared = 59.10 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.986680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.218e-07 3.772e-08
25- 50 6.554e-07 4.477e-08
50-150 7.886e-07 1.222e-07
15-150 1.866e-06 1.421e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.70045 (-1.02809 1.1786)
R1^2/D10^2 : 1.12653 (-0.540191 1.25455)
kT2 [keV] : 18.6705 (-3.55493 6.39119)
R2^2/D10^2 : 1.13691E-02 (-0.00783258 0.0163207)
------------------------------------------------------------
# Chi-Squared = 58.54 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 55 degrees of freedom
# Null hypothesis probability = 3.469415e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.330e-07 1.074e-07
25- 50 6.333e-07 1.438e-07
50-150 8.029e-07 3.498e-07
15-150 1.869e-06 5.177e-07
Peak spectrum fit
Power-law model
Time interval is from 6.688 sec. to 7.688 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89967 ( -0.227853 0.241312 )
Norm@50keV : 1.50517E-02 ( -0.00241964 0.00235621 )
------------------------------------------------------------
# Chi-Squared = 65.65 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.020013e-01
Photon flux (15-150 keV) in 1 sec: 2.15977 ( -0.287823 0.287888 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3838e-07 ( -2.15617e-08 2.19442e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.688 sec. to 7.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43374 ( -1.42706 0.743769 )
Epeak [keV] : 50.7083 ( )
Norm@50keV : 2.82043E-02 ( )
------------------------------------------------------------
# Chi-Squared = 65.13 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 56 degrees of freedom
# Null hypothesis probability = 1.889396e-01
Photon flux (15-150 keV) in 1 sec: 2.13484 ( -0.29621 0.29408 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32224e-07 ( -2.6039e-08 2.5822e-08 ) ergs/cm2
Band function
Time interval is from 6.688 sec. to 7.688 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.82949 ( -13.1711 -13.1711 )
beta : -2.04752 ( -0.323264 0.276847 )
Epeak [keV] : 22.8013 ( -22.8013 6.03049 )
Norm@50keV : 3101.81 ( -3101.71 494.868 )
------------------------------------------------------------
# Chi-Squared = 63.63 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Null hypothesis probability = 1.988227e-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] : 10.1650 (-1.41917 1.64702)
R^2/D10^2 : 0.977612 (-0.427623 0.753686)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.76 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 57 degrees of freedom
# Null hypothesis probability = 6.693042e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.068e-08 4.765e-09
25- 50 5.262e-08 9.435e-09
50-150 2.879e-08 1.007e-08
15-150 1.021e-07 1.904e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 77.0175 (-26.7485 54.4867)
Norm : 10.3596 (-1.95609 2.42346)
------------------------------------------------------------
# Chi-Squared = 65.10 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.155189e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.681e-08 4.930e-09
25- 50 4.373e-08 6.670e-09
50-150 6.014e-08 3.132e-08
15-150 1.307e-07 3.320e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.87160 (-1.56054 1.72519)
R1^2/D10^2 : 1.51976 (-0.779963 1.48107)
kT2 [keV] : 199.801 ( )
R2^2/D10^2 : 1.73023E-04 (-7.85965e-05 0.0206204)
------------------------------------------------------------
# Chi-Squared = 63.04 using 59 PHA bins.
# Chi-Squared = 62.85 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 55 degrees of freedom
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Null hypothesis probability = 2.133431e-01
# Null hypothesis probability = 2.180912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.372e-08 7.535e-09
25- 50 4.946e-08 1.478e-08
50-150 6.478e-08 4.853e-08
15-150 1.380e-07 5.120e-08
Plot creation:
Thu Jan 19 17:04:14 EST 2012