batgrbproduct Analysis for Trigger=349224
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 v2.44
Process Start Time (local time): Tue Apr 14 14:55:20 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger349224/GCN5_download_cron
======================================================================
Trigger: 00349224 Segment: 000
BAT Trigger Time: 261373514.304 [s; MET]
Trigger Stop: 261373515.328 [s; MET]
UTC: 2009-04-14T03:45:09.646740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 265.416223782114 Dec: 39.5268297856288 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.74
Image Trigger?: NO
Rate S/N Ratio: 12.6885775404495 [ if not an image trigger ]
Image S/N Ratio: 5.74
Flight Position: [ source = BAT ]
RA: 265.416223782114 Dec: 39.5268297856288 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 265.413219460522 Dec: 39.4681567619782 [deg; J2000]
{ 17h 41m 39.2s , +39d 28' 05.4" }
+/- 4.56706407921922 [arcmin] (estimated 90% radius based on SNR)
+/- 2.4342282119984 [arcmin] (formal 1-sigma fit error)
SNR: 3.47359881851231
Angular difference between Flight and Ground position is 3.523128 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
T50: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400001883507 second)
Measured from: -1.49011611938477e-08
to: 1.02400000393391 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.003997 -0.006179 0.035594 0.028551
0.009120 0.009352 0.009687 0.010327 [error]
Peak -0.003997 -0.006179 0.035594 0.028551
0.009120 0.009352 0.009687 0.010327 [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 9.69e-10 4.24e-09 1.57e-08 2.08e-07 4.58e-08 2.41e-07 erg/cm2
Error 1.52e-09 4.33e-09 1.20e-08 2.18e-07 3.50e-08 2.40e-07 erg/cm2
Peak flux Power-law 3.02e-02 6.90e-02 1.29e-01 5.69e-01 3.48e-01 8.09e-01 ph/cm2/s
Error 4.71e-02 7.23e-02 7.14e-02 7.18e-01 2.79e-01 6.06e-01 ph/cm2/s
Fluence Cutoff-PL 5.12e-10 5.22e-09 2.31e-08 3.14e-08 4.77e-08 5.52e-08 erg/cm2
Error 3.98e-09 1.07e-08 5.44e-08 2.33e-08 9.37e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.37e-02 7.85e-02 1.91e-01 1.36e-01 3.79e-01 4.19e-01 ph/cm2/s
Error 2.32e-02 7.57e-02 9.03e-02 2.72e-01 1.76e-01 2.73e-01 ph/cm2/s
Fluence Band 1.34e-10 3.42e-09 2.53e-08 2.51e-08 4.80e-08 5.74e-08 erg/cm2
Error 1.12e-08 2.37e-08 1.60e-08 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 1.09e-02 6.54e-02 2.14e-01 1.01e-01 3.69e-01 4.11e-01 ph/cm2/s
Error 3.34e-02 9.37e-02 1.64e-01 1.62e-01 3.68e-01 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.114 1.099 - - 2.69e-03 2.36e-03 62.846 57
CPL 0.097 1.072 9995.8 0.0 2.72e-03 0.00e+00 62.825 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.114 1.099 - - 2.69e-03 2.36e-03 62.846 57
CPL 0.097 1.072 9995.8 0.0 2.72e-03 0.00e+00 62.825 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
265.4132 +39.4682 0.0557 44.6 -11.0 0.0708 3.5 TRIG_00349224
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-30.103 -10.304 (delta_t = 19.799 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.114253 ( -1.33252 0.865256 )
Norm@50keV : 2.691013E-03 ( -2.691013E-03 2.027480E-03) )
------------------------------------------------------------
Chi-Squared = 62.84649 using 59 PHA bins.
Reduced chi-squared = 1.102570 for 57 degrees of freedom
Null hypothesis probability = 0.277
Photon flux (15-150 keV) in 1.024 sec: 0.348418 ( -0.348418 0.210072 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57842e-08 ( -4.57842e-08 2.41849e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.723739E-02 ( -1.27041 0.873746 )
Epeak [keV] : 9995.83 ( )
Norm@50keV : 2.715047E-03 ( )
------------------------------------------------------------
Chi-Squared = 62.82517 using 59 PHA bins.
Reduced chi-squared = 1.121878 for 56 degrees of freedom
Null hypothesis probability = 0.247
Photon flux (15-150 keV) in 1.024 sec: 0.379103 ( -0.175285 0.176152 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77458e-08 ( -2.27634e-08 2.38471e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38417 ( -3.62973 1.568794E-04) )
beta : -9.35811 ( )
Epeak [keV] : 97.2802 ( )
Norm@50keV : 0.106776 ( )
------------------------------------------------------------
Chi-Squared = 58.47105 using 59 PHA bins.
Reduced chi-squared = 1.063110 for 55 degrees of freedom
Null hypothesis probability = 0.349
Photon flux (15-150 keV) in 1.024 sec: 0.369452 ( -0.161848 0.162264 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.80086e-08 ( -2.11519e-08 1.0843e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.114253 ( -1.33252 0.865256 )
Norm@50keV : 2.691013E-03 ( -2.691013E-03 2.027480E-03) )
------------------------------------------------------------
Chi-Squared = 62.84649 using 59 PHA bins.
Reduced chi-squared = 1.102570 for 57 degrees of freedom
Null hypothesis probability = 0.277
Photon flux (15-150 keV) in 1.024 sec: 0.348418 ( -0.348418 0.210072 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57842e-08 ( -4.57842e-08 2.41849e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.723739E-02 ( -1.27041 0.873746 )
Epeak [keV] : 9995.83 ( )
Norm@50keV : 2.715047E-03 ( )
------------------------------------------------------------
Chi-Squared = 62.82517 using 59 PHA bins.
Reduced chi-squared = 1.121878 for 56 degrees of freedom
Null hypothesis probability = 0.247
Photon flux (15-150 keV) in 1.024 sec: 0.379103 ( -0.175285 0.176152 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77458e-08 ( -2.27634e-08 2.38471e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38417 ( -3.11260 1.291275E-03) )
beta : -9.35811 ( )
Epeak [keV] : 97.2802 ( )
Norm@50keV : 0.106776 ( )
------------------------------------------------------------
Chi-Squared = 58.47105 using 59 PHA bins.
Reduced chi-squared = 1.063110 for 55 degrees of freedom
Null hypothesis probability = 0.349
Photon flux (15-150 keV) in 1.024 sec: 0.369452 ( -0.161848 0.162264 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.80086e-08 ( -2.11519e-08 1.0843e-08 ) ergs/cm2
Plot creation:
Tue Apr 14 15:28:02 EDT 2009