batgrbproduct Analysis for Trigger=509337
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 Dec 9 11:55:35 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger509337/batgroup_hand_proc
======================================================================
Trigger: 00509337 Segment: 000
BAT Trigger Time: 345107960 [s; MET]
Trigger Stop: 345108024 [s; MET]
UTC: 2011-12-09T07:19:12.342960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 14.362573622164 Dec: -46.8016976759424 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 22.54
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 22.54
Flight Position: [ source = BAT ]
RA: 14.362573622164 Dec: -46.8016976759424 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 14.3503612108716 Dec: -46.7991862122351 [deg; J2000]
{ 00h 57m 24.1s , -46d 47' 57.1" }
+/- 0.478833060773827 [arcmin] (estimated 90% radius based on SNR)
+/- 0.113920308027337 [arcmin] (formal 1-sigma fit error)
SNR: 87.0959973216231
Angular difference between Flight and Ground position is 0.523740 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 828.603999972343 +/- 29.551808977086
Measured from: -4.27599990367889
to: 824.328000068665 [s; relative to TRIGTIME]
T50: 252.391999959946 +/- 13.6163426582326
Measured from: 154.784000098705
to: 407.176000058651 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 194.620000004768
to: 195.620000004768 [s; relative to TRIGTIME]
Total Fluence
Measured from: -65.7480000257492
to: 913.523999989033 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 17.026746 21.674175 17.210275 4.070717
0.176820 0.184868 0.166007 0.143889 [error]
Peak 0.041312 0.039682 0.026276 0.010907
0.005618 0.006031 0.005527 0.004743 [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 4.76e-06 8.85e-06 1.27e-05 3.85e-05 3.61e-05 6.48e-05 erg/cm2
Error 1.64e-07 1.74e-07 2.09e-07 1.55e-06 5.35e-07 1.59e-06 erg/cm2
Peak flux Power-law 3.24e-01 2.72e-01 1.55e-01 1.31e-01 8.08e-01 8.81e-01 ph/cm2/s
Error 7.30e-02 4.50e-02 4.22e-02 6.73e-02 1.34e-01 1.54e-01 ph/cm2/s
Fluence Cutoff-PL 4.76e-06 8.86e-06 1.27e-05 3.80e-05 3.61e-05 6.21e-05 erg/cm2
Error 2.16e-07 1.77e-07 2.43e-07 3.65e-06 5.85e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.19e-01 2.89e-01 1.49e-01 5.93e-02 7.95e-01 8.16e-01 ph/cm2/s
Error 7.47e-02 6.11e-02 5.84e-02 9.57e-02 1.36e-01 1.75e-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 1.481 0.030 - - 3.88e-03 5.87e-05 24.980 57
CPL 1.432 0.083 655.0 -139.8 4.07e-03 2.52e-04 25.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.812 0.296 - - 5.84e-03 1.22e-03 70.800 57
CPL 1.352 0.000 53.2 0.0 1.13e-02 0.00e+00 70.250 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: 428.800000 sec.
T50 in the 50-300 keV band: 212.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 979.272 -65.748 913.524
T90 828.604 -4.276 824.328
T50 252.392 154.784 407.176
Peak 1.000 194.620 195.620
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
14.3504 -46.7992 0.0022 0.0365 -107.3856 57.8759597 87.096 TRIG_00509337
Foreground time interval of the image:
-16.399 164.560 (delta_t = 180.959 [sec])
166.000 913.524 (delta_t = 747.524 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
-65.748000 164.560000
166.000000 913.524000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48104 ( -0.029546 0.0294959 )
Norm@50keV : 3.88349E-03 ( -5.8753e-05 5.86779e-05 )
------------------------------------------------------------
# Chi-Squared = 24.98 using 59 PHA bins.
# Reduced chi-squared = 0.4383 for 57 degrees of freedom
# Null hypothesis probability = 9.999297e-01
Photon flux (15-150 keV) in 977.8 sec: 0.482382 ( -0.00889315 0.0089335 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61372e-05 ( -5.34564e-07 5.34663e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-65.748000 164.560000
166.000000 913.524000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43202 ( -0.119055 0.0461774 )
Epeak [keV] : 654.994 ( -709.69 -989.255 )
Norm@50keV : 4.06866E-03 ( -6.46205e-05 0.000440122 )
------------------------------------------------------------
# Chi-Squared = 25.19 using 59 PHA bins.
# Reduced chi-squared = 0.4499 for 56 degrees of freedom
# Null hypothesis probability = 9.998764e-01
Photon flux (15-150 keV) in 977.8 sec: 0.479318 0.481856 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61399e-05 ( -6.34397e-07 5.35541e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-65.748000 164.560000
166.000000 913.524000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47723 ( 1.12991 5.88949 )
beta : -1.50223 ( 6.311 16.3082 )
Epeak [keV] : 9998.76 ( -9649.17 -9649.17 )
Norm@50keV : 3.89439E-03 ( -2.97976e-05 5.83766e-05 )
------------------------------------------------------------
# Chi-Squared = 24.95 using 59 PHA bins.
# Reduced chi-squared = 0.4537 for 55 degrees of freedom
# Null hypothesis probability = 9.998388e-01
Photon flux (15-150 keV) in 977.8 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] : 19.1208 ( )
R^2/D10^2 : 2.23570E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 940.95 using 59 PHA bins.
# Reduced chi-squared = 16.508 for 57 degrees of freedom
# Null hypothesis probability = 2.743317e-160
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.567e-06 4.987e-08
25- 50 7.572e-06 1.731e-07
50-150 2.037e-05 4.742e-07
15-150 2.951e-05 4.742e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.978 ( )
Norm : 2.00636 (-0.0296012 0.0296012)
------------------------------------------------------------
# Chi-Squared = 99.83 using 59 PHA bins.
# Reduced chi-squared = 1.751 for 57 degrees of freedom
# Null hypothesis probability = 3.911602e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.887e-06 2.465e-06
25- 50 9.400e-06 4.741e-06
50-150 2.062e-05 1.039e-05
15-150 3.490e-05 1.761e-05
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62871 (-0.483754 0.513084)
R1^2/D10^2 : 0.351169 (-0.0726613 0.0962622)
kT2 [keV] : 29.7874 (-1.56101 1.84604)
R2^2/D10^2 : 4.04069E-03 (-0.000775781 0.000865735)
------------------------------------------------------------
# Chi-Squared = 55.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.698759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.031e-06 2.503e-07
25- 50 8.987e-06 2.523e-07
50-150 2.255e-05 6.258e-07
15-150 3.557e-05 7.089e-07
Peak spectrum fit
Power-law model
Time interval is from 194.620 sec. to 195.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81249 ( -0.286439 0.305381 )
Norm@50keV : 5.83516E-03 ( -0.00123451 0.00120095 )
------------------------------------------------------------
# Chi-Squared = 70.80 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.034280e-01
Photon flux (15-150 keV) in 1 sec: 0.807998 ( -0.133565 0.133604 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.36969e-08 ( -1.11963e-08 1.17333e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 194.620 sec. to 195.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35185 ( )
Epeak [keV] : 53.2427 ( )
Norm@50keV : 1.13130E-02 ( )
------------------------------------------------------------
# Chi-Squared = 70.25 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 56 degrees of freedom
# Null hypothesis probability = 9.532477e-02
Photon flux (15-150 keV) in 1 sec: 0.794928 ( -0.13668 0.135999 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98423e-08 ( -1.43873e-08 1.43273e-08 ) ergs/cm2
Band function
Time interval is from 194.620 sec. to 195.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.36046 ( 1.36161 0.847921 )
beta : -9.37166 ( 9.99997 20 )
Epeak [keV] : 55.5484 ( -26.8669 -55.5008 )
Norm@50keV : 1.10124E-02 ( -0.00613062 0.0150459 )
------------------------------------------------------------
# Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.063667e-02
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] : 8.02336 (-1.27953 1.7262)
R^2/D10^2 : 0.882908 (-0.468632 0.851843)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 74.40 using 59 PHA bins.
# Reduced chi-squared = 1.305 for 57 degrees of freedom
# Null hypothesis probability = 6.065991e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.030e-08 3.090e-09
25- 50 1.812e-08 5.175e-09
50-150 4.803e-09 2.670e-09
15-150 3.322e-08 8.020e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.5250 (-36.1818 106.328)
Norm : 3.79586 (-0.800714 1.1233)
------------------------------------------------------------
# Chi-Squared = 70.18 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.127588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.861e-09 2.234e-09
25- 50 1.631e-08 4.447e-09
50-150 2.331e-08 1.622e-08
15-150 4.948e-08 2.024e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.50677 (-1.21622 1.42909)
R1^2/D10^2 : 1.65614 (-0.875718 1.19158)
kT2 [keV] : 31.5702 (-13.0022 81.7366)
R2^2/D10^2 : 4.07727E-03 (-0.00392033 0.0124272)
------------------------------------------------------------
# Chi-Squared = 63.24 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.082157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.099e-08 5.319e-09
25- 50 1.616e-08 8.449e-09
50-150 2.826e-08 1.691e-08
15-150 5.540e-08 2.737e-08
Plot creation:
Fri Dec 9 12:25:21 EST 2011