batgrbproduct Analysis for Trigger=526351
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 Jul 13 16:32:42 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526351/GCN5_download_cron
======================================================================
Trigger: 00526351 Segment: 000
BAT Trigger Time: 363793356.8 [s; MET]
Trigger Stop: 363793357.824 [s; MET]
UTC: 2012-07-12T13:42:27.382260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 169.60548368771 Dec: -20.0607384702281 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.6
Image Trigger?: NO
Rate S/N Ratio: 20.4694894904587 [ if not an image trigger ]
Image S/N Ratio: 11.6
Flight Position: [ source = BAT ]
RA: 169.60548368771 Dec: -20.0607384702281 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 169.597094841187 Dec: -20.0505787954739 [deg; J2000]
{ 11h 18m 23.3s , -20d 03' 02.1" }
+/- 0.888891753824759 [arcmin] (estimated 90% radius based on SNR)
+/- 0.39394705305619 [arcmin] (formal 1-sigma fit error)
SNR: 35.9907927232874
Angular difference between Flight and Ground position is 0.771451 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 14.8039999604225 +/- 3.2381383787452
Measured from: -2.44799989461899
to: 12.3560000658035 [s; relative to TRIGTIME]
T50: 6.87999993562698 +/- 0.543087432629671
Measured from: 0.564000129699707
to: 7.44400006532669 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.50800001621246
to: 8.50800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.57200002670288
to: 16.527999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.591267 1.026855 0.866267 0.198878
0.037183 0.039723 0.035559 0.028566 [error]
Peak 0.057700 0.108801 0.108540 0.023090
0.008820 0.009844 0.009179 0.007113 [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 2.13e-07 4.25e-07 6.60e-07 2.26e-06 1.84e-06 3.55e-06 erg/cm2
Error 1.75e-08 2.08e-08 3.49e-08 2.64e-07 8.68e-08 2.86e-07 erg/cm2
Peak flux Power-law 5.98e-01 7.44e-01 6.73e-01 1.06e+00 2.38e+00 3.07e+00 ph/cm2/s
Error 1.08e-01 8.43e-02 7.11e-02 2.28e-01 2.34e-01 3.09e-01 ph/cm2/s
Fluence Cutoff-PL 1.97e-07 4.39e-07 6.83e-07 1.35e-06 2.67e-06 0.00e+00 erg/cm2
Error 2.12e-08 2.38e-08 3.95e-08 5.36e-07 5.35e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.78e-01 8.02e-01 7.47e-01 4.33e-01 2.30e+00 2.46e+00 ph/cm2/s
Error 1.30e-01 9.97e-02 8.93e-02 2.56e-01 2.41e-01 3.45e-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 1.364 0.076 - - 8.97e-03 3.90e-04 62.470 57
CPL 0.984 0.306 143.2 158.6 1.36e-02 4.55e-03 57.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.146 0.155 - - 2.04e-02 1.95e-03 67.360 57
CPL 0.133 0.742 99.7 55.8 6.13e-02 5.52e-02 60.410 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: 11.520000 sec.
T50 in the 50-300 keV band: 6.464000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 21.100 -4.572 16.528
T90 14.804 -2.448 12.356
T50 6.880 0.564 7.444
Peak 1.000 7.508 8.508
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
169.5971 -20.0506 0.0053 31.3 154.7 2.6253 36.0 TRIG_00526351
------------------------------------------
Foreground time interval of the image:
-4.572 12.901 (delta_t = 17.473 [sec])
Background time interval of the image:
-239.800 -57.767 (delta_t = 182.033 [sec])
-56.800 -4.572 (delta_t = 52.228 [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 -4.572 sec. to 16.528 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36383 ( -0.0765001 0.0762944 )
Norm@50keV : 8.96961E-03 ( -0.000389518 0.000389491 )
------------------------------------------------------------
# Chi-Squared = 62.47 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.880224e-01
Photon flux (15-150 keV) in 21.1 sec: 1.08370 ( -0.0495273 0.0496183 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8428e-06 ( -8.67071e-08 8.69398e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.572 sec. to 16.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.983996 ( -0.316335 0.295723 )
Epeak [keV] : 143.240 ( -42.1204 275.174 )
Norm@50keV : 1.35921E-02 ( -0.00367098 0.00542493 )
------------------------------------------------------------
# Chi-Squared = 57.56 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.170652e-01
Photon flux (15-150 keV) in 21.1 sec: 1.06314 ( -0.05187 0.05193 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66843e-06 ( -4.22274e-07 6.46863e-07 ) ergs/cm2
Band function
Time interval is from -4.572 sec. to 16.528 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.25846 ( -1.35341 -0.39573 )
beta : -1.49426 ( -0.133711 0.115483 )
Epeak [keV] : 38.7406 ( -8.59801 32.4776 )
Norm@50keV : 0.471145 ( -0.490441 113.004 )
------------------------------------------------------------
# Chi-Squared = 53.66 using 59 PHA bins.
# Reduced chi-squared = 0.9756 for 55 degrees of freedom
# Null hypothesis probability = 5.259760e-01
Photon flux (15-150 keV) in 21.1 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] : 17.3700 ( )
R^2/D10^2 : 7.58122E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 158.83 using 59 PHA bins.
# Reduced chi-squared = 2.7865 for 57 degrees of freedom
# Null hypothesis probability = 1.510884e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.770e-08 8.989e-09
25- 50 4.397e-07 2.891e-08
50-150 9.535e-07 7.512e-08
15-150 1.491e-06 7.839e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.993 ( )
Norm : 4.52529 (-4.52529 -4.52529)
------------------------------------------------------------
# Chi-Squared = 76.63 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.245973e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-07 1.219e-07
25- 50 4.574e-07 2.348e-07
50-150 1.003e-06 5.130e-07
15-150 1.698e-06 8.735e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.78383 (-1.03328 1.16936)
R1^2/D10^2 : 0.705783 (-0.251493 0.422466)
kT2 [keV] : 29.0324 (-3.72037 5.54014)
R2^2/D10^2 : 1.06542E-02 (-0.00479936 0.00673996)
------------------------------------------------------------
# Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217731e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.900e-07 2.820e-08
25- 50 4.505e-07 6.499e-08
50-150 1.173e-06 1.761e-07
15-150 1.813e-06 2.729e-07
Peak spectrum fit
Power-law model
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14573 ( -0.156346 0.153258 )
Norm@50keV : 2.04019E-02 ( -0.00195217 0.00195134 )
------------------------------------------------------------
# Chi-Squared = 67.36 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.638174e-01
Photon flux (15-150 keV) in 1 sec: 2.37807 ( -0.234208 0.234705 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10297e-07 ( -2.16753e-08 2.17879e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.132774 ( -0.805047 0.678815 )
Epeak [keV] : 99.6754 ( -22.9102 88.6772 )
Norm@50keV : 6.13377E-02 ( -0.0313906 0.079012 )
------------------------------------------------------------
# Chi-Squared = 60.41 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 56 degrees of freedom
# Null hypothesis probability = 3.195306e-01
Photon flux (15-150 keV) in 1 sec: 2.29860 ( -0.24112 0.24118 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50195e-07 ( -5.3594e-08 1.0775e-07 ) ergs/cm2
Band function
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99039 ( -210.643 -200.643 )
beta : -1.37323 ( -0.216392 0.203595 )
Epeak [keV] : 33.5637 ( -7.67564 6.92126 )
Norm@50keV : 295.921 ( -295.844 244.289 )
------------------------------------------------------------
# Chi-Squared = 59.49 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 55 degrees of freedom
# Null hypothesis probability = 3.156578e-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] : 19.1259 (-2.07698 2.40111)
R^2/D10^2 : 0.133012 (-0.0432478 0.0619824)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.316136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.541e-09 2.015e-09
25- 50 4.610e-08 6.170e-09
50-150 1.241e-07 2.196e-08
15-150 1.797e-07 2.300e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 9.87463 (-9.87463 -9.87463)
------------------------------------------------------------
# Chi-Squared = 82.50 using 59 PHA bins.
# Reduced chi-squared = 1.447 for 57 degrees of freedom
# Null hypothesis probability = 1.524808e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.459e-08 1.305e-08
25- 50 4.730e-08 2.524e-08
50-150 1.037e-07 5.555e-08
15-150 1.756e-07 9.460e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.30248 (-3.0711 6.04923)
R1^2/D10^2 : 0.855329 (-0.599369 2.5894)
kT2 [keV] : 25.8549 (-5.36672 41.2637)
R2^2/D10^2 : 4.05450E-02 (-0.0387825 0.0565441)
------------------------------------------------------------
# Chi-Squared = 59.37 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 55 degrees of freedom
# Null hypothesis probability = 3.193689e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.557e-08 8.740e-09
25- 50 4.709e-08 2.501e-08
50-150 1.376e-07 7.395e-08
15-150 2.002e-07 1.022e-07
Plot creation:
Fri Jul 13 16:50:00 EDT 2012