batgrbproduct Analysis for Trigger=379449
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): Wed Dec 16 02:59:24 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger379449/GCN5_download_cron
======================================================================
Trigger: 00379449 Segment: 000
BAT Trigger Time: 282584352 [s; MET]
Trigger Stop: 282584416 [s; MET]
UTC: 2009-12-15T15:39:06.649900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 242.043599535328 Dec: 51.3951002102412 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.07
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.07
Flight Position: [ source = BAT ]
RA: 242.043599535328 Dec: 51.3951002102412 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 242.037311321491 Dec: 51.3959970727118 [deg; J2000]
{ 16h 08m 09.0s , +51d 23' 45.6" }
+/- 3.75581515182964 [arcmin] (estimated 90% radius based on SNR)
+/- 2.45599707078009 [arcmin] (formal 1-sigma fit error)
SNR: 4.59316837760601
Angular difference between Flight and Ground position is 0.241480 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.195327 0.243699 0.030790 0.033147
0.048673 0.050231 0.045269 0.041926 [error]
Peak 0.195327 0.243699 0.030790 0.033147
0.048673 0.050231 0.045269 0.041926 [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 7.11e-08 8.35e-08 7.07e-08 1.01e-07 2.61e-07 3.27e-07 erg/cm2
Error 2.29e-08 2.44e-08 3.85e-08 1.08e-07 9.04e-08 1.61e-07 erg/cm2
Peak flux Power-law 3.64e-02 2.37e-02 1.00e-02 5.81e-03 7.30e-02 7.59e-02 ph/cm2/s
Error 1.20e-02 6.72e-03 5.29e-03 6.68e-03 1.92e-02 2.06e-02 ph/cm2/s
Fluence Cutoff-PL 6.74e-08 1.03e-07 3.36e-08 1.12e-09 2.05e-07 2.05e-07 erg/cm2
Error 2.59e-08 3.78e-08 5.10e-08 1.00e-07 9.41e-08 1.59e-07 erg/cm2
Peak flux Cutoff-PL 3.36e-02 2.96e-02 5.31e-03 9.74e-05 6.86e-02 6.86e-02 ph/cm2/s
Error 1.36e-02 1.06e-02 7.20e-03 5.48e-03 1.94e-02 2.08e-02 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 2.240 0.548 - - 4.32e-04 1.75e-04 64.680 57
CPL -1.172 0.000 29.9 -9.3 8.06e-02 0.00e+00 63.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.240 0.548 - - 4.32e-04 1.75e-04 64.680 57
CPL -1.172 0.000 29.9 -9.3 8.06e-02 0.00e+00 63.520 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
242.0373 +51.3960 0.0415 32.8 -160.8 0.4738 4.6 TRIG_00379449
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24027 ( -0.494537 0.602328 )
Norm@50keV : 4.31780E-04 ( -0.000176471 0.000172682 )
------------------------------------------------------------
# Chi-Squared = 64.68 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.262898e-01
Photon flux (15-150 keV) in 64 sec: 7.30303E-02 ( -0.0192363 0.0192567 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61388e-07 ( -8.64019e-08 9.44723e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.17238 ( )
Epeak [keV] : 29.9139 ( -11.4234 -29.9564 )
Norm@50keV : 8.06323E-02 ( )
------------------------------------------------------------
# Chi-Squared = 63.52 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 56 degrees of freedom
# Null hypothesis probability = 2.287114e-01
Photon flux (15-150 keV) in 64 sec: 6.86073E-02 ( -0.0188066 0.0199103 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05303e-07 ( -6.3673e-08 1.2449e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06555 ( 1.9109 0.589132 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 0.111567 ( -0.111567 -0.111567 )
Norm@50keV : 1.96769E-20 ( -7.21402e-21 7.21402e-21 )
------------------------------------------------------------
# Chi-Squared = 83.96 using 59 PHA bins.
# Reduced chi-squared = 1.527 for 55 degrees of freedom
# Null hypothesis probability = 7.187705e-03
Photon flux (15-150 keV) in 64 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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24027 ( -0.494537 0.602328 )
Norm@50keV : 4.31780E-04 ( -0.000176471 0.000172682 )
------------------------------------------------------------
# Chi-Squared = 64.68 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.262898e-01
Photon flux (15-150 keV) in 64 sec: 7.30303E-02 ( -0.0192363 0.0192567 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61388e-07 ( -8.64019e-08 9.44723e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.17238 ( )
Epeak [keV] : 29.9139 ( -11.4234 -29.9564 )
Norm@50keV : 8.06323E-02 ( )
------------------------------------------------------------
# Chi-Squared = 63.52 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 56 degrees of freedom
# Null hypothesis probability = 2.287114e-01
Photon flux (15-150 keV) in 64 sec: 6.86073E-02 ( -0.0188066 0.0199103 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05303e-07 ( -6.3673e-08 1.2449e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06555 ( 1.9109 0.589132 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 0.111567 ( -0.111567 -0.111567 )
Norm@50keV : 1.96769E-20 ( -7.21402e-21 7.21402e-21 )
------------------------------------------------------------
# Chi-Squared = 83.96 using 59 PHA bins.
# Reduced chi-squared = 1.527 for 55 degrees of freedom
# Null hypothesis probability = 7.187705e-03
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Dec 16 03:21:56 EST 2009