batgrbproduct Analysis for Trigger=375409
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 v2.45
Process Start Time (local time): Tue Nov 10 06:01:27 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger375409/GCN5_download_cron
======================================================================
Trigger: 00375409 Segment: 000
BAT Trigger Time: 279496148.404 [s; MET]
Trigger Stop: 279496148.468 [s; MET]
UTC: 2009-11-09T21:49:03.157720 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 112.716715657691 Dec: -54.0804743571872 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.05
Image Trigger?: NO
Rate S/N Ratio: 27.7848879788996 [ if not an image trigger ]
Image S/N Ratio: 7.05
Flight Position: [ source = BAT ]
RA: 112.716715657691 Dec: -54.0804743571872 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 112.749128069712 Dec: -54.0917117665262 [deg; J2000]
{ 07h 30m 59.8s , -54d 05' 30.2" }
+/- 1.18963487029579 [arcmin] (estimated 90% radius based on SNR)
+/- 0.513094676585049 [arcmin] (formal 1-sigma fit error)
SNR: 23.7347435370095
Angular difference between Flight and Ground position is 1.325090 arcmin
Partial Coding Fraction: 0.765625 [ including projection effects ]
Duration
T90: 0.271999955177307 +/- 0.0468187824917992
Measured from: 0.0120001435279846
to: 0.284000098705292 [s; relative to TRIGTIME]
T50: 0.0919999480247498 +/- 0.0282842442734789
Measured from: 0.100000143051147
to: 0.192000091075897 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.333999991416931
to: 0.666000008583069 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400000810623169
to: 0.332000017166138 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.032498 0.076597 0.096733 0.038745
0.004399 0.005721 0.006229 0.005627 [error]
Peak 0.032804 0.076278 0.096235 0.039060
0.004406 0.005740 0.006245 0.005634 [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 9.84e-09 2.94e-08 7.18e-08 4.89e-07 1.94e-07 6.00e-07 erg/cm2
Error 1.59e-09 2.83e-09 5.55e-09 8.92e-08 1.55e-08 9.15e-08 erg/cm2
Peak flux Power-law 9.17e-01 1.48e+00 1.81e+00 4.33e+00 5.44e+00 8.53e+00 ph/cm2/s
Error 1.51e-01 1.48e-01 1.37e-01 7.31e-01 4.06e-01 7.74e-01 ph/cm2/s
Fluence Cutoff-PL 9.02e-09 3.00e-08 7.47e-08 3.24e-07 1.92e-07 4.38e-07 erg/cm2
Error 2.02e-09 3.08e-09 7.18e-09 1.93e-07 1.62e-08 1.91e-07 erg/cm2
Peak flux Cutoff-PL 8.45e-01 1.50e+00 1.87e+00 3.27e+00 5.39e+00 7.48e+00 ph/cm2/s
Error 1.94e-01 1.57e-01 1.41e-01 1.48e+00 4.10e-01 1.56e+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 0.712 0.130 - - 4.77e-02 3.67e-03 54.420 57
CPL 0.390 0.517 300.4 0.0 6.55e-02 3.46e-02 53.340 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.713 0.131 - - 4.71e-02 3.63e-03 55.810 57
CPL 0.429 0.464 333.9 0.0 6.22e-02 3.35e-02 54.970 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: 0.256000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.336 -0.004 0.332
T90 0.272 0.012 0.284
T50 0.092 0.100 0.192
Peak 1.000 -0.334 0.666
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
112.7491 -54.0917 0.0081 32.0 -174.9 0.2726 23.7 TRIG_00375409
------------------------------------------
Foreground time interval of the image:
-0.004 0.332 (delta_t = 0.336 [sec])
Background time interval of the image:
-239.404 -148.264 (delta_t = 91.140 [sec])
-147.404 -0.004 (delta_t = 147.400 [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
Time interval is from -0.004 sec. to 0.332 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.712260 ( -0.131787 0.127806 )
Norm@50keV : 4.76778E-02 ( -0.0036803 0.00365109 )
------------------------------------------------------------
# Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 57 degrees of freedom
# Null hypothesis probability = 5.725151e-01
Photon flux (15-150 keV) in 0.336 sec: 5.50597 ( -0.408856 0.40921 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94468e-07 ( -1.54779e-08 1.55303e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.389519 ( -0.591042 0.443538 )
Epeak [keV] : 300.390 ( -300.443 -300.443 )
Norm@50keV : 6.54908E-02 ( -0.0202236 0.0490063 )
------------------------------------------------------------
# Chi-Squared = 53.34 using 59 PHA bins.
# Reduced chi-squared = 0.9524 for 56 degrees of freedom
# Null hypothesis probability = 5.763563e-01
Photon flux (15-150 keV) in 0.336 sec: 5.45686 ( -0.41779 0.20803 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92376e-07 ( -1.63215e-08 1.61099e-08 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.332 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.938259 ( 0.938271 0.938271 )
beta : -0.712260 ( -0.127852 0.131736 )
Epeak [keV] : 16.2788 ( -16.2788 -16.2788 )
Norm@50keV : 6.56832E-02 ( -0.023338 1.35658e+06 )
------------------------------------------------------------
# Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 55 degrees of freedom
# Null hypothesis probability = 4.967872e-01
Photon flux (15-150 keV) in 0.336 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] : 26.0323 (-2.663 3.19019)
R^2/D10^2 : 0.127383 (-0.0363474 0.0478489)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 71.19 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 57 degrees of freedom
# Null hypothesis probability = 9.791828e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.930e-09 7.073e-10
25- 50 2.854e-08 3.214e-09
50-150 1.424e-07 1.525e-08
15-150 1.759e-07 1.688e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 20.3011 ( )
------------------------------------------------------------
# Chi-Squared = 161.76 using 59 PHA bins.
# Reduced chi-squared = 2.8378 for 57 degrees of freedom
# Null hypothesis probability = 5.731049e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.699e-08 9.080e-09
25- 50 3.267e-08 1.737e-08
50-150 7.166e-08 3.832e-08
15-150 1.213e-07 6.446e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 16.3756 (-5.4027 3.4603)
R1^2/D10^2 : 0.361350 (-0.172045 0.602164)
kT2 [keV] : 199.596 ( )
R2^2/D10^2 : 1.03916E-03 (-0.000208669 0.0366132)
------------------------------------------------------------
# Chi-Squared = 52.32 using 59 PHA bins.
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9513 for 55 degrees of freedom
# Reduced chi-squared = 0.9496 for 55 degrees of freedom
# Null hypothesis probability = 5.776565e-01
# Null hypothesis probability = 5.811714e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.342e-09 2.400e-09
25- 50 3.232e-08 1.319e-08
50-150 1.488e-07 8.012e-08
15-150 1.885e-07 9.425e-08
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.004 sec. to 0.336 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.712744 ( -0.132728 0.128729 )
Norm@50keV : 4.70814E-02 ( -0.00364902 0.00361968 )
------------------------------------------------------------
# Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 0.9791 for 57 degrees of freedom
# Null hypothesis probability = 5.198974e-01
Photon flux (15-150 keV) in 0.34 sec: 5.43689 ( -0.405351 0.405703 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94281e-07 ( -1.55401e-08 1.55913e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.429139 ( -0.588163 0.34028 )
Epeak [keV] : 333.895 ( -333.921 -333.921 )
Norm@50keV : 6.22143E-02 ( -0.0206611 0.0462468 )
------------------------------------------------------------
# Chi-Squared = 54.97 using 59 PHA bins.
# Reduced chi-squared = 0.9816 for 56 degrees of freedom
# Null hypothesis probability = 5.138573e-01
Photon flux (15-150 keV) in 0.34 sec: 5.39424 ( -0.41284 0.40786 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92484e-07 ( -1.63292e-08 1.61235e-08 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.336 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.996822 ( 0.996872 0.996872 )
beta : -0.712744 ( -0.128772 0.132701 )
Epeak [keV] : 14.7395 ( -14.7392 -14.7392 )
Norm@50keV : 6.57717E-02 ( -0.0234165 0 )
------------------------------------------------------------
# Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 55 degrees of freedom
# Null hypothesis probability = 4.442745e-01
Photon flux (15-150 keV) in 0.34 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] : 26.0988 (-2.70097 3.24435)
R^2/D10^2 : 0.124689 (-0.0359024 0.04742)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.60 using 59 PHA bins.
# Reduced chi-squared = 1.291 for 57 degrees of freedom
# Null hypothesis probability = 6.860402e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.901e-09 8.330e-10
25- 50 2.841e-08 3.351e-09
50-150 1.424e-07 1.596e-08
15-150 1.757e-07 1.600e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 ( )
Norm : 20.0509 ( )
------------------------------------------------------------
# Chi-Squared = 161.68 using 59 PHA bins.
# Reduced chi-squared = 2.8365 for 57 degrees of freedom
# Null hypothesis probability = 5.876355e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.698e-08 9.008e-09
25- 50 3.266e-08 1.724e-08
50-150 7.162e-08 3.757e-08
15-150 1.213e-07 6.438e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 16.2297 (-5.25292 3.36766)
R1^2/D10^2 : 0.364692 (-0.171831 0.587738)
kT2 [keV] : 199.618 ( )
R2^2/D10^2 : 1.04486E-03 (-0.000207465 0.0216921)
------------------------------------------------------------
# Chi-Squared = 54.02 using 59 PHA bins.
# Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 55 degrees of freedom
# Reduced chi-squared = 0.9808 for 55 degrees of freedom
# Null hypothesis probability = 5.120145e-01
# Null hypothesis probability = 5.150198e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.374e-09 2.771e-09
25- 50 3.229e-08 1.325e-08
50-150 1.488e-07 8.043e-08
15-150 1.885e-07 9.460e-08
Plot creation:
Tue Nov 10 06:29:33 EST 2009