batgrbproduct Analysis for Trigger=425647
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 26 06:54:37 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger425647/GCN5_download_cron
======================================================================
Trigger: 00425647 Segment: 000
BAT Trigger Time: 299183554.304 [s; MET]
Trigger Stop: 299183554.56 [s; MET]
UTC: 2010-06-25T18:32:28.377940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 15.7708589285121 Dec: -39.0829393330905 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.27
Image Trigger?: NO
Rate S/N Ratio: 93.2469838654313 [ if not an image trigger ]
Image S/N Ratio: 15.27
Flight Position: [ source = BAT ]
RA: 15.7708589285121 Dec: -39.0829393330905 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 15.8174903928383 Dec: -39.0744862937282 [deg; J2000]
{ 01h 03m 16.2s , -39d 04' 28.2" }
+/- 2.02203860624239 [arcmin] (estimated 90% radius based on SNR)
+/- 0.794221655813838 [arcmin] (formal 1-sigma fit error)
SNR: 11.1243928757658
Angular difference between Flight and Ground position is 2.230378 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 423 +/- 213.358852640335
Measured from: 187.696000099182
to: 610.696000099182 [s; relative to TRIGTIME]
T50: 206 +/- 343.110769285955
Measured from: 324.696000099182
to: 530.696000099182 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.304000020027161
to: 0.695999979972839 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.304000020027161
to: 636.695999979973 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.357373 0.092838 0.408450 0.569486
0.142995 0.141173 0.127997 0.124428 [error]
Peak 0.054855 0.124321 0.114086 0.042209
0.007604 0.007334 0.007361 0.006168 [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 2.52e-08 9.68e-08 3.11e-07 3.28e-06 8.77e-07 3.72e-06 erg/cm2
Error 3.63e-08 7.16e-08 2.13e-07 4.26e-06 3.30e-07 4.21e-06 erg/cm2
Peak flux Power-law 5.41e-01 7.56e-01 7.83e-01 1.48e+00 2.55e+00 3.56e+00 ph/cm2/s
Error 7.52e-02 6.25e-02 5.59e-02 2.38e-01 1.69e-01 2.67e-01 ph/cm2/s
Fluence Cutoff-PL 2.51e-08 9.67e-08 3.12e-07 3.27e-06 8.77e-07 3.22e-06 erg/cm2
Error 3.62e-08 7.15e-08 2.13e-07 4.23e-06 3.30e-07 4.89e-06 erg/cm2
Peak flux Cutoff-PL 5.29e-01 7.60e-01 7.90e-01 1.34e+00 2.54e+00 3.42e+00 ph/cm2/s
Error 8.96e-02 6.58e-02 6.51e-02 4.50e-01 1.69e-01 4.76e-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 0.314 1.029 - - 9.33e-05 7.10e-05 48.930 57
CPL 0.296 0.000 9999.1 0.0 9.39e-05 1.57e-03 48.940 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.950 0.119 - - 2.22e-02 1.45e-03 71.630 57
CPL 0.858 0.384 701.6 0.0 2.44e-02 9.11e-03 71.500 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: 0.320000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 637.000 -0.304 636.696
T90 423.000 187.696 610.696
T50 206.000 324.696 530.696
Peak 1.000 -0.304 0.696
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
15.8175 -39.0745 0.0173 2.1 -18.1 0.3909 11.1 TRIG_00425647
------------------------------------------
Foreground time interval of the image:
-0.304 8.797 (delta_t = 9.101 [sec])
Background time interval of the image:
-239.304 -95.814 (delta_t = 143.490 [sec])
-94.304 -0.304 (delta_t = 94.000 [sec])
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
Multiple GTIs in the spectrum
tstart tstop
-0.304000 613.616000
614.696000 618.576000
619.696000 625.486000
626.696000 636.696000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.313945 ( -1.14613 0.91208 )
Norm@50keV : 9.32948E-05 ( -9.32949e-05 4.87299e-05 )
------------------------------------------------------------
# Chi-Squared = 48.93 using 59 PHA bins.
# Reduced chi-squared = 0.8584 for 57 degrees of freedom
# Null hypothesis probability = 7.677315e-01
Photon flux (15-150 keV) in 633.6 sec: 1.14712E-02 ( -0.00462779 0.00490886 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.76681e-07 ( -3.30126e-07 3.29819e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.304000 613.616000
614.696000 618.576000
619.696000 625.486000
626.696000 636.696000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.295796 ( 0.287761 0.287761 )
Epeak [keV] : 9999.14 ( )
Norm@50keV : 9.39043E-05 ( -9.39116e-05 0.00304851 )
------------------------------------------------------------
# Chi-Squared = 48.94 using 59 PHA bins.
# Reduced chi-squared = 0.8738 for 56 degrees of freedom
# Null hypothesis probability = 7.370030e-01
Photon flux (15-150 keV) in 633.6 sec: 1.14627E-02 ( -0.00462129 0.004906 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.77238e-07 ( -3.30403e-07 3.30125e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.304000 613.616000
614.696000 618.576000
619.696000 625.486000
626.696000 636.696000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.765026 ( 0.765026 0.765026 )
beta : -0.314004 ( -0.911405 1.14703 )
Epeak [keV] : 20.7937 ( -20.7937 -20.7937 )
Norm@50keV : 1.24921E-04 ( -0.000124908 2506.46 )
------------------------------------------------------------
# Chi-Squared = 48.93 using 59 PHA bins.
# Reduced chi-squared = 0.8897 for 55 degrees of freedom
# Null hypothesis probability = 7.044343e-01
Photon flux (15-150 keV) in 633.6 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] : 48.3104 ( )
R^2/D10^2 : 6.29499E-05 (-5.71459e-05 0.000236576)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 49.38 using 59 PHA bins.
# Reduced chi-squared = 0.8663 for 57 degrees of freedom
# Null hypothesis probability = 7.532795e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.876e-08 5.943e-08
25- 50 1.448e-08 1.192e-08
50-150 3.030e-11 5.810e-11
15-150 1.033e-07 6.574e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.96 -199.96)
Norm : 4.79675E-02 (-0.020465 0.0204662)
------------------------------------------------------------
# Chi-Squared = 54.47 using 59 PHA bins.
# Reduced chi-squared = 0.9556 for 57 degrees of freedom
# Null hypothesis probability = 5.706951e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.568e-08 5.037e-08
25- 50 1.456e-07 9.336e-08
50-150 3.193e-07 2.064e-07
15-150 5.405e-07 3.612e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.65145 (-1.73575 2.53964)
R1^2/D10^2 : 1.38325 (-1.3821 687.164)
kT2 [keV] : 55.4107 (-26.353 -55.1526)
R2^2/D10^2 : 4.23067E-05 (-3.79936e-05 0.000166555)
------------------------------------------------------------
# Chi-Squared = 44.67 using 59 PHA bins.
# Reduced chi-squared = 0.8121 for 55 degrees of freedom
# Null hypothesis probability = 8.388881e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.121e-08 4.245e-08
25- 50 6.797e-08 4.549e-08
50-150 8.226e-07 5.677e-07
15-150 9.718e-07 6.054e-07
Peak spectrum fit
Power-law model
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.950330 ( -0.120127 0.117906 )
Norm@50keV : 2.21919E-02 ( -0.00145512 0.00145 )
------------------------------------------------------------
# Chi-Squared = 71.63 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.191691e-02
Photon flux (15-150 keV) in 1 sec: 2.54958 ( -0.168331 0.168716 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44347e-07 ( -1.76764e-08 1.77696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.858378 ( -0.472454 0.295662 )
Epeak [keV] : 701.611 ( -701.65 -701.65 )
Norm@50keV : 2.44233E-02 ( -0.00335123 0.0148763 )
------------------------------------------------------------
# Chi-Squared = 71.50 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 56 degrees of freedom
# Null hypothesis probability = 7.932972e-02
Photon flux (15-150 keV) in 1 sec: 2.53873 ( -0.16735 0.17156 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43038e-07 ( -1.8445e-08 1.8737e-08 ) ergs/cm2
Band function
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.811762 ( 0.811762 0.811762 )
beta : -0.950313 ( -0.117766 0.120105 )
Epeak [keV] : 48.4737 ( -48.4741 9951.52 )
Norm@50keV : 3.44779E-02 ( -0.0137285 17536.6 )
------------------------------------------------------------
# Chi-Squared = 71.63 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 55 degrees of freedom
# Null hypothesis probability = 6.537144e-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] : 21.9705 (-2.08503 2.41151)
R^2/D10^2 : 9.07057E-02 (-0.0247242 0.0328858)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 111.85 using 59 PHA bins.
# Reduced chi-squared = 1.9622 for 57 degrees of freedom
# Null hypothesis probability = 1.968039e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.108e-09 1.161e-09
25- 50 4.284e-08 4.365e-09
50-150 1.545e-07 1.750e-08
15-150 2.054e-07 1.780e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 10.1962 ( )
------------------------------------------------------------
# Chi-Squared = 139.19 using 59 PHA bins.
# Reduced chi-squared = 2.4419 for 57 degrees of freedom
# Null hypothesis probability = 7.936617e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.539e-08 1.333e-08
25- 50 4.884e-08 2.562e-08
50-150 1.071e-07 5.615e-08
15-150 1.813e-07 9.540e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.8183 (-2.08743 2.61928)
R1^2/D10^2 : 0.533754 (-0.230786 0.432536)
kT2 [keV] : 54.5324 (-17.7754 123.938)
R2^2/D10^2 : 5.37007E-03 (-0.00450331 0.0104029)
------------------------------------------------------------
# Chi-Squared = 67.38 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 55 degrees of freedom
# Null hypothesis probability = 1.221222e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.463e-08 3.775e-09
25- 50 4.798e-08 1.272e-08
50-150 1.824e-07 8.476e-08
15-150 2.450e-07 9.583e-08
Plot creation:
Sat Jun 26 07:08:13 EDT 2010