batgrbproduct Analysis for Trigger=382399
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): Mon Jan 11 15:38:22 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger382399/GCN5_download_cron
======================================================================
Trigger: 00382399 Segment: 000
BAT Trigger Time: 284875974.464 [s; MET]
Trigger Stop: 284875974.976 [s; MET]
UTC: 2010-01-11T04:12:49.036100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 247.038118029266 Dec: 15.5569602813662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.08
Image Trigger?: NO
Rate S/N Ratio: 18.1107702762748 [ if not an image trigger ]
Image S/N Ratio: 12.08
Flight Position: [ source = BAT ]
RA: 247.038118029266 Dec: 15.5569602813662 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 247.028787717854 Dec: 15.5386520819156 [deg; J2000]
{ 16h 28m 06.9s , +15d 32' 19.1" }
+/- 1.21910758609023 [arcmin] (estimated 90% radius based on SNR)
+/- 0.447730500703993 [arcmin] (formal 1-sigma fit error)
SNR: 22.9192915364775
Angular difference between Flight and Ground position is 1.223750 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 12.8839999437332 +/- 2.13374417749157
Measured from: -5.63199985027313
to: 7.25200009346008 [s; relative to TRIGTIME]
T50: 3.78399991989136 +/- 1.48283109071998
Measured from: -0.395999848842621
to: 3.38800007104874 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0320000052452087
to: 1.03200000524521 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.50800001621246
to: 8.7039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.370580 0.451655 0.271330 0.045588
0.024588 0.024559 0.023014 0.023114 [error]
Peak 0.068777 0.090846 0.064305 0.008387
0.006663 0.006952 0.006564 0.005939 [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 1.10e-07 1.80e-07 2.23e-07 5.49e-07 6.67e-07 1.06e-06 erg/cm2
Error 1.20e-08 1.17e-08 2.29e-08 1.21e-07 5.23e-08 1.40e-07 erg/cm2
Peak flux Power-law 6.07e-01 6.25e-01 4.53e-01 5.26e-01 1.89e+00 2.21e+00 ph/cm2/s
Error 9.18e-02 5.69e-02 5.44e-02 1.32e-01 1.65e-01 2.03e-01 ph/cm2/s
Fluence Cutoff-PL 1.10e-07 1.80e-07 2.23e-07 5.44e-07 6.67e-07 1.01e-06 erg/cm2
Error 1.20e-08 1.18e-08 2.30e-08 1.20e-07 5.23e-08 2.26e-07 erg/cm2
Peak flux Cutoff-PL 6.07e-01 6.25e-01 4.53e-01 5.23e-01 1.89e+00 2.21e+00 ph/cm2/s
Error 9.18e-02 5.70e-02 5.45e-02 1.31e-01 1.65e-01 2.02e-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 1.688 0.130 - - 4.44e-03 3.24e-04 55.240 57
CPL 1.670 0.570 847.2 0.0 4.54e-03 0.00e+00 55.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.464 0.162 - - 1.53e-02 1.40e-03 55.020 57
CPL 1.461 0.497 9999.6 0.0 1.53e-02 1.28e-02 55.020 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: 8.064000 sec.
T50 in the 50-300 keV band: 4.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 16.212 -7.508 8.704
T90 12.884 -5.632 7.252
T50 3.784 -0.396 3.388
Peak 1.000 0.032 1.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
247.0288 +15.5387 0.0084 16.1 -159.3 1.1060 22.9 TRIG_00382399
------------------------------------------
Foreground time interval of the image:
-7.508 8.704 (delta_t = 16.212 [sec])
Background time interval of the image:
-239.464 -7.508 (delta_t = 231.956 [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 -7.508 sec. to 8.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68818 ( -0.128488 0.130644 )
Norm@50keV : 4.44166E-03 ( -0.00032551 0.000321511 )
------------------------------------------------------------
# Chi-Squared = 55.24 using 59 PHA bins.
# Reduced chi-squared = 0.9691 for 57 degrees of freedom
# Null hypothesis probability = 5.413242e-01
Photon flux (15-150 keV) in 16.21 sec: 0.587487 ( -0.0384789 0.0385297 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.67268e-07 ( -5.19026e-08 5.26908e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.508 sec. to 8.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67047 ( -0.421414 0.718987 )
Epeak [keV] : 847.194 ( )
Norm@50keV : 4.53861E-03 ( )
------------------------------------------------------------
# Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9870 for 56 degrees of freedom
# Null hypothesis probability = 5.023537e-01
Photon flux (15-150 keV) in 16.21 sec: 0.587232 ( -0.038463 0.038514 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.67197e-07 ( -5.1906e-08 5.26922e-08 ) ergs/cm2
Band function
Time interval is from -7.508 sec. to 8.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20189 ( 1.20189 1.20189 )
beta : -1.74567 ( 1.74567 0.179859 )
Epeak [keV] : 52.8756 ( -52.8756 -52.8756 )
Norm@50keV : 9.21098E-03 ( -0.00921098 15.5953 )
------------------------------------------------------------
# Chi-Squared = 54.99 using 59 PHA bins.
# Reduced chi-squared = 0.9998 for 55 degrees of freedom
# Null hypothesis probability = 4.750830e-01
Photon flux (15-150 keV) in 16.21 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46373 ( -0.161115 0.162955 )
Norm@50keV : 1.52807E-02 ( -0.00140983 0.00139608 )
------------------------------------------------------------
# Chi-Squared = 55.02 using 59 PHA bins.
# Reduced chi-squared = 0.9652 for 57 degrees of freedom
# Null hypothesis probability = 5.497891e-01
Photon flux (15-150 keV) in 1 sec: 1.88963 ( -0.164712 0.164802 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45862e-07 ( -1.51763e-08 1.54043e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46120 ( -0.422831 0.570242 )
Epeak [keV] : 9999.56 ( )
Norm@50keV : 1.53291E-02 ( -0.0153291 0.0102839 )
------------------------------------------------------------
# Chi-Squared = 55.02 using 59 PHA bins.
# Reduced chi-squared = 0.9826 for 56 degrees of freedom
# Null hypothesis probability = 5.117871e-01
Photon flux (15-150 keV) in 1 sec: 1.88895 ( -0.16466 0.16474 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45858e-07 ( -1.518e-08 1.5409e-08 ) ergs/cm2
Band function
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98026 ( -98.7566 -98.7566 )
beta : -1.53261 ( -0.222949 0.17807 )
Epeak [keV] : 23.3717 ( -23.3669 5.23264 )
Norm@50keV : 2310.11 ( -2317.82 27627.9 )
------------------------------------------------------------
# Chi-Squared = 53.59 using 59 PHA bins.
# Reduced chi-squared = 0.9743 for 55 degrees of freedom
# Null hypothesis probability = 5.288060e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Mon Jan 11 15:58:31 EST 2010