batgrbproduct Analysis for Trigger=536580
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): Thu Oct 25 08:31:12 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger536580/batgroup_hand_proc
======================================================================
Trigger: 00536580 Segment: 000
BAT Trigger Time: 372740182.272 [s; MET]
Trigger Stop: 372740183.68 [s; MET]
UTC: 2012-10-24T02:56:12.478460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 70.4670677361895 Dec: -12.2687432432442 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.16
Image Trigger?: NO
Rate S/N Ratio: 21.9317121994613 [ if not an image trigger ]
Image S/N Ratio: 9.16
Flight Position: [ source = BAT ]
RA: 70.4670677361895 Dec: -12.2687432432442 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 70.4814203515924 Dec: -12.2553181059367 [deg; J2000]
{ 04h 41m 55.5s , -12d 15' 19.1" }
+/- 1.68991775288134 [arcmin] (estimated 90% radius based on SNR)
+/- 0.739025884899362 [arcmin] (formal 1-sigma fit error)
SNR: 14.374612281434
Angular difference between Flight and Ground position is 1.164897 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 69 +/- 32.0624390837628
Measured from: -7.27200001478195
to: 61.727999985218 [s; relative to TRIGTIME]
T50: 13 +/- 15.2970585407784
Measured from: -2.27200001478195
to: 10.727999985218 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.727999985218048
to: 1.72799998521805 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.27200001478195
to: 75.727999985218 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.513693 0.588090 0.463461 0.108068
0.066101 0.066275 0.061411 0.059076 [error]
Peak 0.035729 0.049962 0.061272 0.027497
0.008777 0.009533 0.009274 0.008347 [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 1.32e-07 2.56e-07 3.85e-07 1.25e-06 1.08e-06 2.02e-06 erg/cm2
Error 2.80e-08 3.17e-08 6.21e-08 4.53e-07 1.49e-07 4.97e-07 erg/cm2
Peak flux Power-law 3.09e-01 3.90e-01 3.58e-01 5.75e-01 1.25e+00 1.63e+00 ph/cm2/s
Error 1.08e-01 8.15e-02 7.40e-02 2.61e-01 2.25e-01 3.20e-01 ph/cm2/s
Fluence Cutoff-PL 1.32e-07 2.57e-07 3.85e-07 1.24e-06 2.02e-06 0.00e+00 erg/cm2
Error 2.79e-08 3.17e-08 6.19e-08 5.47e-07 4.28e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.09e-01 3.90e-01 3.58e-01 5.70e-01 1.25e+00 1.60e+00 ph/cm2/s
Error 1.16e-01 8.41e-02 7.91e-02 2.25e-01 3.96e-01 0.00e+00 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 1.413 0.223 - - 1.34e-03 1.61e-04 44.080 57
CPL 1.421 0.241 9999.4 0.0 1.34e-03 4.72e-04 44.100 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.123 0.322 - - 1.08e-02 1.90e-03 66.490 57
CPL 1.118 2.521 9999.7 0.0 1.08e-02 2.14e-03 66.490 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: 11.968000 sec.
T50 in the 50-300 keV band: 6.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 84.000 -8.272 75.728
T90 69.000 -7.272 61.728
T50 13.000 -2.272 10.728
Peak 1.000 0.728 1.728
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
70.4814 -12.2553 0.0134 25.9 112.4 1.4604 14.4 TRIG_00536580
------------------------------------------
Foreground time interval of the image:
-8.272 29.029 (delta_t = 37.301 [sec])
Background time interval of the image:
-202.371 -8.272 (delta_t = 194.099 [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 -8.272 sec. to 75.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41331 ( -0.222859 0.223362 )
Norm@50keV : 1.33815E-03 ( -0.000161433 0.00015999 )
------------------------------------------------------------
# Chi-Squared = 44.08 using 59 PHA bins.
# Reduced chi-squared = 0.7733 for 57 degrees of freedom
# Null hypothesis probability = 8.947937e-01
Photon flux (15-150 keV) in 84 sec: 0.163461 ( -0.0193026 0.019342 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08322e-06 ( -1.479e-07 1.50225e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.272 sec. to 75.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42140 ( -0.267817 0.214998 )
Epeak [keV] : 9999.36 ( -9999.98 -9999.98 )
Norm@50keV : 1.33516E-03 ( -0.000159242 0.000784484 )
------------------------------------------------------------
# Chi-Squared = 44.10 using 59 PHA bins.
# Reduced chi-squared = 0.7875 for 56 degrees of freedom
# Null hypothesis probability = 8.751673e-01
Photon flux (15-150 keV) in 84 sec: 0.163492 ( -0.019404 0.019151 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01523e-06 ( -4.67418e-07 3.87929e-07 ) ergs/cm2
Band function
Time interval is from -8.272 sec. to 75.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94456 ( -36.4368 -36.4368 )
beta : -1.45209 ( -0.247947 0.236935 )
Epeak [keV] : 21.4536 ( -21.4478 6.00773 )
Norm@50keV : 305.993 ( -306.86 315.425 )
------------------------------------------------------------
# Chi-Squared = 43.51 using 59 PHA bins.
# Reduced chi-squared = 0.7911 for 55 degrees of freedom
# Null hypothesis probability = 8.682037e-01
Photon flux (15-150 keV) in 84 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] : 15.8413 (-2.94281 3.81102)
R^2/D10^2 : 1.47968E-02 (-0.0075219 0.0150691)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 74.02 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.431669e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.463e-08 1.602e-08
25- 50 2.696e-07 4.763e-08
50-150 4.711e-07 1.265e-07
15-150 8.054e-07 1.513e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 0.667297 (-0.667297 -0.667297)
------------------------------------------------------------
# Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8223 for 57 degrees of freedom
# Null hypothesis probability = 8.284729e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.396e-07 7.564e-08
25- 50 2.685e-07 1.455e-07
50-150 5.888e-07 3.172e-07
15-150 9.968e-07 5.359e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.38973 (-1.69142 2.2416)
R1^2/D10^2 : 0.265975 (-0.175081 0.612171)
kT2 [keV] : 35.6910 (-11.3123 37.1756)
R2^2/D10^2 : 9.20302E-04 (-0.000763051 0.00209278)
------------------------------------------------------------
# Chi-Squared = 42.06 using 59 PHA bins.
# Reduced chi-squared = 0.7647 for 55 degrees of freedom
# Null hypothesis probability = 9.000634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.457e-07 7.417e-08
25- 50 2.410e-07 9.912e-08
50-150 7.639e-07 4.127e-07
15-150 1.151e-06 4.863e-07
Peak spectrum fit
Power-law model
Time interval is from 0.728 sec. to 1.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12301 ( -0.325964 0.317928 )
Norm@50keV : 1.07801E-02 ( -0.00189713 0.00189712 )
------------------------------------------------------------
# Chi-Squared = 66.49 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.825521e-01
Photon flux (15-150 keV) in 1 sec: 1.25335 ( -0.224554 0.22501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11894e-07 ( -2.23481e-08 2.26583e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.728 sec. to 1.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11815 ( -1.07309 3.96956 )
Epeak [keV] : 9999.70 ( )
Norm@50keV : 1.08371E-02 ( -0.00190722 0.00237043 )
------------------------------------------------------------
# Chi-Squared = 66.49 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 56 degrees of freedom
# Null hypothesis probability = 1.591754e-01
Photon flux (15-150 keV) in 1 sec: 1.25310 ( -0.22616 0.22471 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.728 sec. to 1.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97159 ( -69.2279 -69.2279 )
beta : -1.15515 ( -0.352759 0.341561 )
Epeak [keV] : 23.3566 ( -23.3463 11.6143 )
Norm@50keV : 1164.39 ( -1168.87 165293 )
------------------------------------------------------------
# Chi-Squared = 66.30 using 59 PHA bins.
# Reduced chi-squared = 1.205 for 55 degrees of freedom
# Null hypothesis probability = 1.414585e-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] : 21.3472 (-5.09051 7.27399)
R^2/D10^2 : 4.71726E-02 (-0.0278665 0.0650121)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 75.26 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.296364e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.032e-09 1.741e-09
25- 50 2.094e-08 6.485e-09
50-150 7.120e-08 2.716e-08
15-150 9.617e-08 3.303e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 5.07799 (-5.07799 -5.07799)
------------------------------------------------------------
# Chi-Squared = 71.67 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.139174e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.264e-08 7.220e-09
25- 50 2.432e-08 1.374e-08
50-150 5.334e-08 3.027e-08
15-150 9.031e-08 5.045e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.01894 (-2.52071 3.39742)
R1^2/D10^2 : 1.85245 (-1.58623 15.5311)
kT2 [keV] : 32.1919 (-10.146 35.5975)
R2^2/D10^2 : 1.17823E-02 (-0.010193 0.0166243)
------------------------------------------------------------
# Chi-Squared = 65.47 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.577563e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.079e-08 6.165e-09
25- 50 2.058e-08 1.062e-08
50-150 8.310e-08 4.829e-08
15-150 1.145e-07 6.260e-08
Plot creation:
Thu Oct 25 09:55:13 EDT 2012