batgrbproduct Analysis for Trigger=530031
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): Mon Aug 6 13:49:20 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger530031/GCN5_download_cron
======================================================================
Trigger: 00530031 Segment: 000
BAT Trigger Time: 365894899.392 [s; MET]
Trigger Stop: 365894907.584 [s; MET]
UTC: 2012-08-05T21:28:09.886740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 216.533341737596 Dec: 5.80233114541574 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.44
Image Trigger?: NO
Rate S/N Ratio: 8.18535277187245 [ if not an image trigger ]
Image S/N Ratio: 8.44
Flight Position: [ source = BAT ]
RA: 216.533341737596 Dec: 5.80233114541574 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 216.535503837972 Dec: 5.85269038039993 [deg; J2000]
{ 14h 26m 08.5s , +05d 51' 09.7" }
+/- 2.16029138891944 [arcmin] (estimated 90% radius based on SNR)
+/- 0.767232123661856 [arcmin] (formal 1-sigma fit error)
SNR: 10.121470563875
Angular difference between Flight and Ground position is 3.024309 arcmin
Partial Coding Fraction: 0.3789062 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -15.391999900341
to: 32.608000099659 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.608000099658966
to: 16.608000099659 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.10799998044968
to: 9.10799998044968 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.3920000195503
to: 32.6079999804497 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.133240 0.463592 0.375730 0.142017
0.069034 0.062408 0.055063 0.048684 [error]
Peak 0.012549 0.017648 0.008052 0.012350
0.010081 0.009010 0.007931 0.007189 [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 7.83e-08 1.73e-07 3.00e-07 1.21e-06 8.22e-07 1.77e-06 erg/cm2
Error 2.51e-08 3.35e-08 5.23e-08 4.82e-07 1.35e-07 5.07e-07 erg/cm2
Peak flux Power-law 1.01e-01 1.06e-01 7.81e-02 9.32e-02 3.21e-01 3.78e-01 ph/cm2/s
Error 1.37e-01 9.51e-02 7.14e-02 7.15e-01 2.83e-01 6.40e-01 ph/cm2/s
Fluence Cutoff-PL 6.48e-08 1.83e-07 3.22e-07 4.64e-07 1.03e-06 0.00e+00 erg/cm2
Error 2.98e-08 3.87e-08 6.22e-08 7.72e-07 7.12e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.03e-01 1.06e-01 7.78e-02 9.13e-02 3.22e-01 3.77e-01 ph/cm2/s
Error 1.37e-01 9.51e-02 6.86e-02 7.92e-01 2.83e-01 3.21e-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 1.202 0.275 - - 1.69e-03 2.69e-04 64.210 57
CPL 0.383 1.199 108.5 -34.4 4.02e-03 8.05e-03 62.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.437 1.645 - - 2.61e-03 2.21e-03 41.330 57
CPL 3.072 0.000 307.1 0.0 4.04e-04 0.00e+00 41.280 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: 15.808000 sec.
T50 in the 50-300 keV band: 7.872000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 48.000 -15.392 32.608
T90 48.000 -15.392 32.608
T50 16.000 0.608 16.608
Peak 1.000 8.108 9.108
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
216.5355 +5.8527 0.0190 38.5 -46.5 1.2581 10.1 TRIG_00530031
------------------------------------------
Foreground time interval of the image:
-15.392 32.608 (delta_t = 48.000 [sec])
Background time interval of the image:
-239.392 -15.392 (delta_t = 224.000 [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 -15.392 sec. to 32.608 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20187 ( -0.281748 0.268882 )
Norm@50keV : 1.68796E-03 ( -0.000270011 0.00026881 )
------------------------------------------------------------
# Chi-Squared = 64.21 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 57 degrees of freedom
# Null hypothesis probability = 2.387877e-01
Photon flux (15-150 keV) in 48 sec: 0.198188 ( -0.0335755 0.0339675 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.21568e-07 ( -1.34639e-07 1.35467e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.392 sec. to 32.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.382940 ( -1.46005 0.937703 )
Epeak [keV] : 108.514 ( -39.738 -108.513 )
Norm@50keV : 4.01857E-03 ( -0.00249282 0.0136058 )
------------------------------------------------------------
# Chi-Squared = 62.64 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 56 degrees of freedom
# Null hypothesis probability = 2.525482e-01
Photon flux (15-150 keV) in 48 sec: 0.190329 ( -0.034942 0.035472 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03351e-06 ( -3.48667e-07 1.07501e-06 ) ergs/cm2
Band function
Time interval is from -15.392 sec. to 32.608 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99984 ( -12189.5 -12174.5 )
beta : -1.41069 ( -0.428099 0.343348 )
Epeak [keV] : 32.6343 ( -8.97435 11.7113 )
Norm@50keV : 29.9279 ( -30.3996 172.511 )
------------------------------------------------------------
# Chi-Squared = 60.28 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 55 degrees of freedom
# Null hypothesis probability = 2.907626e-01
Photon flux (15-150 keV) in 48 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] : 18.9429 (-3.38275 4.4882)
R^2/D10^2 : 1.09358E-02 (-0.00559642 0.0104904)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 66.69 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.782450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.706e-08 1.248e-08
25- 50 1.779e-07 4.586e-08
50-150 4.688e-07 1.370e-07
15-150 6.838e-07 1.777e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 0.851286 (-0.851286 -0.851286)
------------------------------------------------------------
# Chi-Squared = 68.07 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.497031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.018e-07 5.587e-08
25- 50 1.957e-07 1.052e-07
50-150 4.293e-07 2.358e-07
15-150 7.268e-07 3.943e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.90255 (-5.0947 -10.1614)
R1^2/D10^2 : 5.51823E-02 (-0.0388057 0.343361)
kT2 [keV] : 32.9893 (-28.2965 -35.1013)
R2^2/D10^2 : 1.30712E-03 (-0.0010224 0.00801454)
------------------------------------------------------------
# Chi-Squared = 61.76 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.473498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.277e-08 3.787e-08
25- 50 1.936e-07 1.083e-07
50-150 5.396e-07 2.904e-07
15-150 7.960e-07 4.003e-07
Peak spectrum fit
Power-law model
Time interval is from 8.108 sec. to 9.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43721 ( -1.43614 1.85442 )
Norm@50keV : 2.61174E-03 ( -0.00261185 0.00181649 )
------------------------------------------------------------
# Chi-Squared = 41.33 using 59 PHA bins.
# Reduced chi-squared = 0.7251 for 57 degrees of freedom
# Null hypothesis probability = 9.412118e-01
Photon flux (15-150 keV) in 1 sec: 0.320747 ( -0.320747 0.245265 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50604e-08 ( -1.83709e-08 1.9498e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.108 sec. to 9.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.07151 ( )
Epeak [keV] : 307.061 ( )
Norm@50keV : 4.03602E-04 ( )
------------------------------------------------------------
# Chi-Squared = 41.28 using 59 PHA bins.
# Reduced chi-squared = 0.7372 for 56 degrees of freedom
# Null hypothesis probability = 9.293526e-01
Photon flux (15-150 keV) in 1 sec: 0.321797 ( -0.321797 0.243545 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51089e-08 ( -1.84462e-08 1.94388e-08 ) ergs/cm2
Band function
Time interval is from 8.108 sec. to 9.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97394 ( -75.2964 -75.2964 )
beta : -1.59194 ( 1.57329 1.57329 )
Epeak [keV] : 24.7440 ( -24.68 -24.68 )
Norm@50keV : 283.383 ( -291.857 25135.7 )
------------------------------------------------------------
# Chi-Squared = 41.22 using 59 PHA bins.
# Reduced chi-squared = 0.7494 for 55 degrees of freedom
# Null hypothesis probability = 9.159341e-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] : 9.67650 (-6.44698 -9.75108)
R^2/D10^2 : 0.163990 (-0.156577 14.0499)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 42.66 using 59 PHA bins.
# Reduced chi-squared = 0.7484 for 57 degrees of freedom
# Null hypothesis probability = 9.210237e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.090e-09 2.432e-09
25- 50 7.327e-09 5.205e-09
50-150 3.474e-09 3.707e-09
15-150 1.389e-08 1.006e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-199.644 -199.644)
Norm : 1.31082 (-0.927011 4.83608)
------------------------------------------------------------
# Chi-Squared = 41.53 using 59 PHA bins.
# Reduced chi-squared = 0.7285 for 57 degrees of freedom
# Null hypothesis probability = 9.384785e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.264e-09 2.216e-09
25- 50 6.279e-09 4.571e-09
50-150 1.377e-08 9.100e-09
15-150 2.331e-08 1.731e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.82643 (-3.30345 10.5449)
R1^2/D10^2 : 0.567356 (-0.571019 77.9079)
kT2 [keV] : 199.362 (-199.998 -199.998)
R2^2/D10^2 : 6.75045E-05 (-7.0319e-05 0.0404426)
------------------------------------------------------------
# Chi-Squared = 39.97 using 59 PHA bins.
# Reduced chi-squared = 0.7268 for 55 degrees of freedom
# Null hypothesis probability = 9.362049e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.221e-09 2.883e-09
25- 50 6.125e-09 3.796e-09
50-150 1.869e-08 1.326e-09
15-150 2.904e-08 8.690e-09
Plot creation:
Mon Aug 6 14:10:28 EDT 2012