batgrbproduct Analysis for Trigger=538696
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 Nov 18 17:38:38 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger538696/batgroup_hand_proc
======================================================================
Trigger: 00538696 Segment: 000
BAT Trigger Time: 374835061.88 [s; MET]
Trigger Stop: 374835096.88 [s; MET]
UTC: 2012-11-17T08:50:51.996980 [includes UTCF correction]
Where From?: Command line
BAT
RA: 31.6352009882339 Dec: 7.37901368067297 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.28
Image Trigger?: NO
Rate S/N Ratio: 21.8174242292714 [ if not an image trigger ]
Image S/N Ratio: 10.28
Flight Position: [ source = EXTERNAL ]
RA: 31.615 Dec: 7.4395 [deg; J2000]
Partial Coding Fraction: 1.015625 [ including projection effects ]
Angular difference between Flight and Ground position is 0.000000 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 121.591999948025 +/- 16.6997006934527
Measured from: 3.60000014305115
to: 125.192000091076 [s; relative to TRIGTIME]
T50: 77.3679999709129 +/- 24.2625967369215
Measured from: 9.00000011920929
to: 86.3680000901222 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.05599999427795
to: 8.05599999427795 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0360000133514404
to: 158.639999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.537996 0.678541 0.771187 0.078061
0.074451 0.080774 0.072115 0.074603 [error]
Peak 0.031403 0.048466 0.047907 0.017241
0.005666 0.006362 0.006054 0.005219 [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 1.31e-07 2.97e-07 5.31e-07 2.24e-06 1.45e-06 3.20e-06 erg/cm2
Error 2.56e-08 3.50e-08 6.86e-08 6.43e-07 1.75e-07 6.89e-07 erg/cm2
Peak flux Power-law 2.40e-01 3.26e-01 3.27e-01 5.91e-01 1.08e+00 1.48e+00 ph/cm2/s
Error 6.15e-02 5.05e-02 4.62e-02 1.84e-01 1.39e-01 2.14e-01 ph/cm2/s
Fluence Cutoff-PL 1.12e-07 3.18e-07 5.64e-07 8.15e-07 1.81e-06 0.00e+00 erg/cm2
Error 3.17e-08 4.20e-08 7.92e-08 8.74e-07 8.84e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.37e-01 3.27e-01 3.29e-01 5.58e-01 1.08e+00 1.45e+00 ph/cm2/s
Error 6.84e-02 5.40e-02 5.18e-02 2.52e-01 1.40e-01 3.09e-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 1.161 0.183 - - 8.90e-04 9.43e-05 72.000 57
CPL 0.369 0.838 109.0 331.0 2.13e-03 2.30e-03 68.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.997 0.225 - - 9.41e-03 1.19e-03 60.680 57
CPL 0.941 0.261 998.6 0.0 1.00e-02 0.00e+00 60.680 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: 116.288000 sec.
T50 in the 50-300 keV band: 48.896000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 158.604 0.036 158.640
T90 121.592 3.600 125.192
T50 77.368 9.000 86.368
Peak 1.000 7.056 8.056
Image
Pre-slew 15.0-200.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
31.6150 7.4395 0.0102 5.6282 131.5655 1.6173666 18.923 TRIG_00538696
Foreground time interval of the image:
0.000 35.000 (delta_t = 35.000 [sec])
Background time interval of the image:
-40.000 -5.000 (delta_t = 35.000 [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 0.036 sec. to 158.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16112 ( -0.184189 0.18143 )
Norm@50keV : 8.89928E-04 ( -9.43171e-05 9.42706e-05 )
------------------------------------------------------------
# Chi-Squared = 72.00 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 57 degrees of freedom
# Null hypothesis probability = 8.712159e-02
Photon flux (15-150 keV) in 158.6 sec: 0.103923 ( -0.0111405 0.0111531 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44815e-06 ( -1.74249e-07 1.76416e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.036 sec. to 158.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.369263 ( -0.926157 0.750064 )
Epeak [keV] : 108.993 ( -32.9278 628.99 )
Norm@50keV : 2.12588E-03 ( -0.00117522 0.00342281 )
------------------------------------------------------------
# Chi-Squared = 68.72 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 56 degrees of freedom
# Null hypothesis probability = 1.182733e-01
Photon flux (15-150 keV) in 158.6 sec: 0.100199 ( -0.0117921 0.011732 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8081e-06 ( -4.88072e-07 1.2792e-06 ) ergs/cm2
Band function
Time interval is from 0.036 sec. to 158.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.369213 ( -0.550075 1.23504 )
beta : -10.00000 ( 4.69417e+10 4.69417e+10 )
Epeak [keV] : 108.975 ( -32.9258 637.593 )
Norm@50keV : 2.12601E-03 ( -0.00117442 0.00342609 )
------------------------------------------------------------
# Chi-Squared = 68.72 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 55 degrees of freedom
# Null hypothesis probability = 1.010364e-01
Photon flux (15-150 keV) in 158.6 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] : 18.8397 (-2.29602 2.74927)
R^2/D10^2 : 5.93664E-03 (-0.0021331 0.00317778)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 76.43 using 59 PHA bins.
# Reduced chi-squared = 1.341 for 57 degrees of freedom
# Null hypothesis probability = 4.390960e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.589e-08 1.302e-08
25- 50 3.150e-07 5.115e-08
50-150 8.203e-07 1.589e-07
15-150 1.201e-06 1.903e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 0.422990 (-0.42299 -0.42299)
------------------------------------------------------------
# Chi-Squared = 82.10 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 57 degrees of freedom
# Null hypothesis probability = 1.639507e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.670e-07 8.993e-08
25- 50 3.212e-07 1.741e-07
50-150 7.045e-07 3.795e-07
15-150 1.193e-06 6.470e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.21333 (-1.7647 2.99277)
R1^2/D10^2 : 0.176700 (-0.144403 1.00539)
kT2 [keV] : 22.7862 (-3.49005 5.7176)
R2^2/D10^2 : 2.91888E-03 (-0.00156715 0.0019431)
------------------------------------------------------------
# Chi-Squared = 65.98 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 55 degrees of freedom
# Null hypothesis probability = 1.476443e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.241e-07 6.206e-08
25- 50 2.942e-07 9.663e-08
50-150 9.190e-07 3.607e-07
15-150 1.337e-06 4.255e-07
Peak spectrum fit
Power-law model
Time interval is from 7.056 sec. to 8.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.996609 ( -0.228395 0.221096 )
Norm@50keV : 9.41383E-03 ( -0.00119317 0.00119126 )
------------------------------------------------------------
# Chi-Squared = 60.68 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.448371e-01
Photon flux (15-150 keV) in 1 sec: 1.08371 ( -0.138827 0.138818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01901e-07 ( -1.43899e-08 1.45699e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.056 sec. to 8.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.940786 ( -0.248611 0.27347 )
Epeak [keV] : 998.594 ( )
Norm@50keV : 1.00250E-02 ( )
------------------------------------------------------------
# Chi-Squared = 60.68 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.111150e-01
Photon flux (15-150 keV) in 1 sec: 1.08184 ( -0.139838 0.14054 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41621e-07 ( -1.22583e-07 8.3303e-08 ) ergs/cm2
Band function
Time interval is from 7.056 sec. to 8.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -59883.2 -59883.2 )
beta : -1.06718 ( -0.295387 0.264332 )
Epeak [keV] : 27.7963 ( -27.7963 9.73954 )
Norm@50keV : 349.533 ( -349.534 1.92435e+06 )
------------------------------------------------------------
# Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.957522e-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] : 20.3443 (-3.5352 4.75287)
R^2/D10^2 : 4.88936E-02 (-0.0233993 0.040954)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.11 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.392611e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-09 1.043e-09
25- 50 1.952e-08 4.090e-09
50-150 6.001e-08 1.388e-08
15-150 8.340e-08 1.560e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 4.30997 (-4.30997 -4.30997)
------------------------------------------------------------
# Chi-Squared = 76.68 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 57 degrees of freedom
# Null hypothesis probability = 4.211665e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.073e-08 5.875e-09
25- 50 2.064e-08 1.141e-08
50-150 4.527e-08 2.452e-08
15-150 7.665e-08 4.211e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.9420 (-3.86556 3.6922)
R1^2/D10^2 : 0.195296 (-0.108344 0.204132)
kT2 [keV] : 94.1461 (-61.0621 -94.1343)
R2^2/D10^2 : 6.70972E-04 (-0.000523855 0.00817015)
------------------------------------------------------------
# Chi-Squared = 58.89 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Null hypothesis probability = 3.350174e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.270e-09 3.299e-09
25- 50 2.149e-08 1.143e-08
50-150 7.412e-08 6.201e-08
15-150 1.019e-07 5.453e-08
Plot creation:
Sun Nov 18 17:56:00 EST 2012