batgrbproduct Analysis for Trigger=425002
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Jun 19 15:56:27 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger425002/GCN5_download_cron
======================================================================
Trigger: 00425002 Segment: 000
BAT Trigger Time: 298603840 [s; MET]
Trigger Stop: 298604160 [s; MET]
UTC: 2010-06-19T01:30:34.094460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.418784311701 Dec: 27.338022347786 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.38
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.38
Flight Position: [ source = BAT ]
RA: 296.418784311701 Dec: 27.338022347786 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 296.436535596476 Dec: 27.3563011930247 [deg; J2000]
{ 19h 45m 44.8s , +27d 21' 22.7" }
+/- 3.08436048220466 [arcmin] (estimated 90% radius based on SNR)
+/- 1.83441701620542 [arcmin] (formal 1-sigma fit error)
SNR: 6.08570716833032
Angular difference between Flight and Ground position is 1.448384 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.209382 0.457896 -0.173488 0.061765
0.099983 0.100560 0.086634 0.074321 [error]
Peak 1.209382 0.457896 -0.173488 0.061765
0.099983 0.100560 0.086634 0.074321 [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 3.19e-07 1.77e-07 6.19e-08 2.83e-08 5.73e-07 5.86e-07 erg/cm2
Error 5.03e-08 4.92e-08 3.58e-08 2.92e-08 1.17e-07 1.29e-07 erg/cm2
Peak flux Power-law 3.25e-02 1.08e-02 2.01e-03 4.40e-04 4.56e-02 4.57e-02 ph/cm2/s
Error 4.21e-03 2.70e-03 1.04e-03 4.69e-04 6.62e-03 6.71e-03 ph/cm2/s
Fluence Cutoff-PL 3.31e-07 1.85e-07 1.33e-08 4.14e-11 5.30e-07 5.30e-07 erg/cm2
Error 5.43e-08 6.59e-08 2.64e-08 3.38e-09 9.91e-08 9.72e-08 erg/cm2
Peak flux Cutoff-PL 3.25e-02 1.08e-02 2.01e-03 4.37e-04 4.56e-02 4.57e-02 ph/cm2/s
Error 4.21e-03 2.70e-03 1.04e-03 4.65e-04 6.62e-03 6.71e-03 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 3.524 0.475 - - 1.12e-04 5.02e-05 72.270 57
CPL 0.383 0.000 13.4 0.0 2.46e-02 0.00e+00 67.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.415 0.416 - - 1.21e-04 4.96e-05 74.400 57
CPL 1.000 0.000 50.0 0.0 8.89e-04 0.00e+00 147.010 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.4365 +27.3563 0.0317 13.5 176.5 1.4144 6.1 TRIG_00425002
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.52441 ( -0.439629 0.510525 )
Norm@50keV : 1.11817E-04 ( -4.50273e-05 5.54152e-05 )
------------------------------------------------------------
# Chi-Squared = 72.27 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 57 degrees of freedom
# Null hypothesis probability = 8.366009e-02
Photon flux (15-150 keV) in 320 sec: 4.61625E-02 ( -0.00733494 0.00737636 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.72845e-07 ( -1.12346e-07 1.2195e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.382882 ( )
Epeak [keV] : 13.4270 ( )
Norm@50keV : 2.46174E-02 ( )
------------------------------------------------------------
# Chi-Squared = 67.44 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 56 degrees of freedom
# Null hypothesis probability = 1.407399e-01
Photon flux (15-150 keV) in 320 sec: 4.61422E-02 ( -0.007334 0.0073738 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.29926e-07 ( -9.55936e-08 1.02678e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.433670 ( -3.35146 3.84272 )
beta : -9.37167 ( 10 19.9991 )
Epeak [keV] : 13.2439 ( -5.74567 3.37711 )
Norm@50keV : 2.24634E-02 ( -0.0173877 40.751 )
------------------------------------------------------------
# Chi-Squared = 67.44 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 55 degrees of freedom
# Null hypothesis probability = 1.210581e-01
Photon flux (15-150 keV) in 320 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] : 4.50606 (-0.693232 0.803755)
R^2/D10^2 : 0.665968 (-0.363296 0.876038)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 68.26 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 57 degrees of freedom
# Null hypothesis probability = 1.459974e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.354e-07 1.043e-07
25- 50 1.680e-07 6.520e-08
50-150 4.021e-09 3.157e-09
15-150 5.074e-07 1.482e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.5083 (-3.19541 4.47352)
Norm : 1.07770 (-0.382435 0.755088)
------------------------------------------------------------
# Chi-Squared = 67.80 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.549486e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.295e-07 8.818e-08
25- 50 1.868e-07 6.819e-08
50-150 2.243e-08 1.673e-08
15-150 5.387e-07 1.412e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.39477 (-3.37835 -3.37835)
R1^2/D10^2 : 1.66774 (-1.71751 -1.71751)
kT2 [keV] : 6.34100 (-6.28931 -6.28931)
R2^2/D10^2 : 6.82676E-02 (-0.0737811 1.20734)
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246736e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.325e-07 1.682e-07
25- 50 1.867e-07 1.115e-07
50-150 1.632e-08 9.162e-09
15-150 5.355e-07 2.942e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.41535 ( -0.371816 0.460546 )
Norm@50keV : 1.20810E-04 ( -4.62207e-05 5.29037e-05 )
------------------------------------------------------------
# Chi-Squared = 74.40 using 59 PHA bins.
# Reduced chi-squared = 1.305 for 57 degrees of freedom
# Null hypothesis probability = 6.067189e-02
Photon flux (15-150 keV) in 320 sec: 4.55877E-02 ( -0.00658505 0.00665823 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.76602e-07 ( -1.09931e-07 1.20878e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.89295E-04 ( )
------------------------------------------------------------
# Chi-Squared = 147.01 using 59 PHA bins.
# Reduced chi-squared = 2.6251 for 56 degrees of freedom
# Null hypothesis probability = 4.217321e-10
Photon flux (15-150 keV) in 320 sec: 4.55701E-02 ( -0.0065842 0.0066569 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.60833 ( 3.28998 6.09737 )
beta : -3.42081 ( -0.453756 0.378607 )
Epeak [keV] : 81.0029 ( -81.0029 -81.0029 )
Norm@50keV : 1.63332E-02 ( -0.00617429 0.00729815 )
------------------------------------------------------------
# Chi-Squared = 74.40 using 59 PHA bins.
# Reduced chi-squared = 1.353 for 55 degrees of freedom
# Null hypothesis probability = 4.181215e-02
Photon flux (15-150 keV) in 320 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] : 4.41278 (-0.599709 0.671182)
R^2/D10^2 : 0.749629 (-0.360891 0.765971)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.79 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.190357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.443e-07 8.699e-08
25- 50 1.631e-07 5.741e-08
50-150 3.486e-09 2.625e-09
15-150 5.108e-07 1.510e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7033 (-2.99765 4.0356)
Norm : 1.05141 (-0.317913 0.588628)
------------------------------------------------------------
# Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.302846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.284e-07 6.464e-08
25- 50 1.894e-07 5.595e-08
50-150 2.357e-08 1.700e-08
15-150 5.414e-07 1.312e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.37614 (-3.3599 -3.3599)
R1^2/D10^2 : 1.72792 (-1.77805 -1.77805)
kT2 [keV] : 6.33141 (-6.27286 -6.27286)
R2^2/D10^2 : 6.95841E-02 (-0.0760481 1.17346)
------------------------------------------------------------
# Chi-Squared = 68.54 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.038191e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.353e-07 1.870e-07
25- 50 1.877e-07 1.063e-07
50-150 1.639e-08 1.094e-08
15-150 5.393e-07 3.227e-07
Plot creation:
Sat Jun 19 16:31:11 EDT 2010