batgrbproduct Analysis for Trigger=539358
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): Sat Nov 24 04:24:39 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger539358/GCN5_download_cron
======================================================================
Trigger: 00539358 Segment: 000
BAT Trigger Time: 375357771.2 [s; MET]
Trigger Stop: 375357779.392 [s; MET]
UTC: 2012-11-23T10:02:41.294660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 307.361694621078 Dec: -11.8596197133855 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.11
Image Trigger?: NO
Rate S/N Ratio: 8.42614977317636 [ if not an image trigger ]
Image S/N Ratio: 8.11
Flight Position: [ source = BAT ]
RA: 307.361694621078 Dec: -11.8596197133855 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 307.334164995375 Dec: -11.8733639995468 [deg; J2000]
{ 20h 29m 20.2s , -11d 52' 24.1" }
+/- 1.78088749503164 [arcmin] (estimated 90% radius based on SNR)
+/- 0.708459614962538 [arcmin] (formal 1-sigma fit error)
SNR: 13.3372490026169
Angular difference between Flight and Ground position is 1.814679 arcmin
Partial Coding Fraction: 0.8203125 [ including projection effects ]
Duration
T90: 326.919999957085 +/- 13.8670995923469
Measured from: 41.9200001358986
to: 368.840000092983 [s; relative to TRIGTIME]
T50: 62.3639999032021 +/- 2.81948932095092
Measured from: 214.104000151157
to: 276.468000054359 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 232.56400001049
to: 233.56400001049 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.33999997377396
to: 419.227999985218 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.747280 9.418937 5.903030 0.856266
0.131494 0.134727 0.120450 0.111680 [error]
Peak 0.059580 0.125774 0.105680 0.028485
0.007229 0.008105 0.007539 0.005950 [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 2.50e-06 3.88e-06 4.52e-06 1.02e-05 1.39e-05 2.11e-05 erg/cm2
Error 1.04e-07 9.38e-08 1.30e-07 6.50e-07 3.15e-07 7.32e-07 erg/cm2
Peak flux Power-law 7.05e-01 8.19e-01 6.85e-01 9.66e-01 2.56e+00 3.18e+00 ph/cm2/s
Error 9.57e-02 6.89e-02 5.96e-02 1.74e-01 1.93e-01 2.47e-01 ph/cm2/s
Fluence Cutoff-PL 2.10e-06 4.07e-06 4.69e-06 3.89e-06 1.47e-05 0.00e+00 erg/cm2
Error 1.33e-07 1.08e-07 1.45e-07 7.87e-07 8.72e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 6.17e-01 8.62e-01 7.30e-01 5.14e-01 2.49e+00 2.72e+00 ph/cm2/s
Error 1.17e-01 8.02e-02 7.15e-02 2.69e-01 2.00e-01 3.33e-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 4.83e-02 1.16e-01 2.91e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 3.32e-02 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 1.779 0.042 - - 3.54e-03 7.89e-05 100.310 57
CPL 0.966 0.203 65.1 5.1 8.71e-03 1.94e-03 44.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.258 0.124 - - 2.16e-02 1.60e-03 67.090 57
CPL 0.623 0.552 115.0 133.9 4.37e-02 2.86e-02 62.580 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: 134.528000 sec.
T50 in the 50-300 keV band: 43.904000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 425.568 -6.340 419.228
T90 326.920 41.920 368.840
T50 62.364 214.104 276.468
Peak 1.000 232.564 233.564
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
307.3342 -11.8734 0.0144 28.1 177.8 1.5081 13.3 TRIG_00539358
------------------------------------------
Foreground time interval of the image:
-6.340 52.301 (delta_t = 58.641 [sec])
Background time interval of the image:
-239.200 -6.340 (delta_t = 232.860 [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 -6.340 sec. to 419.228 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77926 ( -0.0417055 0.0418259 )
Norm@50keV : 3.54127E-03 ( -7.88955e-05 7.88474e-05 )
------------------------------------------------------------
# Chi-Squared = 100.31 using 59 PHA bins.
# Reduced chi-squared = 1.7599 for 57 degrees of freedom
# Null hypothesis probability = 3.495420e-04
Photon flux (15-150 keV) in 425.6 sec: 0.484109 ( -0.0120617 0.0121115 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38865e-05 ( -3.14648e-07 3.14979e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.340 sec. to 419.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.965519 ( -0.207134 0.198102 )
Epeak [keV] : 65.0975 ( -4.29202 5.902 )
Norm@50keV : 8.71370E-03 ( -0.00168325 0.00220122 )
------------------------------------------------------------
# Chi-Squared = 44.44 using 59 PHA bins.
# Reduced chi-squared = 0.7937 for 56 degrees of freedom
# Null hypothesis probability = 8.672260e-01
Photon flux (15-150 keV) in 425.6 sec: 0.452854 ( -0.013678 0.013765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47467e-05 ( -7.94765e-07 9.50195e-07 ) ergs/cm2
Band function
Time interval is from -6.340 sec. to 419.228 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.793649 ( -0.319751 0.464671 )
beta : -2.33619 ( 2.33619 0.235408 )
Epeak [keV] : 59.7421 ( -9.02989 9.50754 )
Norm@50keV : 1.08924E-02 ( -0.00346926 0.00938672 )
------------------------------------------------------------
# Chi-Squared = 43.24 using 59 PHA bins.
# Reduced chi-squared = 0.7862 for 55 degrees of freedom
# Null hypothesis probability = 8.745345e-01
Photon flux (15-150 keV) in 425.6 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] : 13.9269 ( )
R^2/D10^2 : 6.46528E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 294.77 using 59 PHA bins.
# Reduced chi-squared = 5.1714 for 57 degrees of freedom
# Null hypothesis probability = 8.996415e-34
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.128e-06 4.894e-08
25- 50 4.173e-06 1.141e-07
50-150 5.315e-06 2.234e-07
15-150 1.062e-05 2.383e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 115.041 (4.8995 26.1864)
Norm : 2.04572 (-0.0679572 0.0716053)
------------------------------------------------------------
# Chi-Squared = 51.73 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 57 degrees of freedom
# Null hypothesis probability = 6.723603e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.271e-06 8.555e-08
25- 50 4.033e-06 8.874e-08
50-150 7.047e-06 6.490e-07
15-150 1.335e-05 6.639e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.52283 (-0.817363 0.843845)
R1^2/D10^2 : 0.371966 (-0.103243 0.168158)
kT2 [keV] : 21.9841 (-2.00432 2.71752)
R2^2/D10^2 : 8.60961E-03 (-0.0033756 0.00444054)
------------------------------------------------------------
# Chi-Squared = 52.08 using 59 PHA bins.
# Reduced chi-squared = 0.9469 for 55 degrees of freedom
# Null hypothesis probability = 5.869995e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.869e-06 1.556e-07
25- 50 4.151e-06 2.194e-07
50-150 6.774e-06 4.937e-07
15-150 1.279e-05 8.278e-07
Peak spectrum fit
Power-law model
Time interval is from 232.564 sec. to 233.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25804 ( -0.124664 0.12421 )
Norm@50keV : 2.15874E-02 ( -0.00159748 0.00159704 )
------------------------------------------------------------
# Chi-Squared = 67.09 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.694397e-01
Photon flux (15-150 keV) in 1 sec: 2.55657 ( -0.193315 0.193523 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15591e-07 ( -1.77131e-08 1.78116e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 232.564 sec. to 233.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.623246 ( -0.587622 0.515886 )
Epeak [keV] : 114.953 ( -32.3627 235.396 )
Norm@50keV : 4.36536E-02 ( -0.0186773 0.0384636 )
------------------------------------------------------------
# Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 56 degrees of freedom
# Null hypothesis probability = 2.542901e-01
Photon flux (15-150 keV) in 1 sec: 2.49444 ( -0.20029 0.2001 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83133e-07 ( -6.0891e-08 1.19363e-07 ) ergs/cm2
Band function
Time interval is from 232.564 sec. to 233.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.287665 ( -0.823251 4.33583 )
beta : -1.59484 ( 1.59715 0.312206 )
Epeak [keV] : 81.4270 ( -46.8704 178.596 )
Norm@50keV : 6.95495E-02 ( -0.0733395 100.638 )
------------------------------------------------------------
# Chi-Squared = 62.24 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.340654e-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] : 17.5696 (-1.56475 1.76456)
R^2/D10^2 : 0.181389 (-0.0500192 0.0671484)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 86.65 using 59 PHA bins.
# Reduced chi-squared = 1.520 for 57 degrees of freedom
# Null hypothesis probability = 6.874504e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 1.645e-09
25- 50 5.129e-08 5.430e-09
50-150 1.142e-07 1.597e-08
15-150 1.767e-07 1.730e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 10.5806 (-10.5806 -10.5806)
------------------------------------------------------------
# Chi-Squared = 79.21 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.747449e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.634e-08 1.376e-08
25- 50 5.067e-08 2.656e-08
50-150 1.111e-07 5.855e-08
15-150 1.881e-07 9.830e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.24117 (-3.00317 3.19135)
R1^2/D10^2 : 0.875257 (-0.462607 1.1814)
kT2 [keV] : 30.4094 (-8.05006 27.5476)
R2^2/D10^2 : 2.17100E-02 (-0.0188359 0.0475186)
------------------------------------------------------------
# Chi-Squared = 62.85 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Null hypothesis probability = 2.181846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.786e-08 6.600e-09
25- 50 5.196e-08 1.679e-08
50-150 1.390e-07 6.226e-08
15-150 2.088e-07 8.842e-08
Plot creation:
Sat Nov 24 04:47:29 EST 2012