batgrbproduct Analysis for Trigger=297116
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 v2.41
Process Start Time (local time): Sat Dec 15 01:49:28 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger297116/GCN5_download_cron
======================================================================
Trigger: 00297116 Segment: 000
BAT Trigger Time: 217391792 [s; MET]
Trigger Stop: 217391856 [s; MET]
UTC: 2007-11-22T02:36:29.621420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 104.538872176891 Dec: -7.22167281516853 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.22
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.22
Flight Position: [ source = BAT ]
RA: 104.538872176891 Dec: -7.22167281516853 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 104.509464751506 Dec: -7.23398642934389 [deg; J2000]
{ 06h 58m 02.3s , -07d 14' 02.4" }
+/- 3.18320855588612 [arcmin] (estimated 90% radius based on SNR)
+/- 1.3274540238215 [arcmin] (formal 1-sigma fit error)
SNR: 5.81754397833408
RA = 6h 58m 2.3s (104.509465 deg.)
Dec = -7d 14' 2" (-7.233986 deg.)
Angular difference between Flight and Ground position is 1.899957 arcmin
Partial Coding Fraction: 0.8828125 [ 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 0.290282 0.170449 0.008285 0.015863
0.041258 0.041630 0.038044 0.037920 [error]
Peak 0.290282 0.170449 0.008285 0.015863
0.041258 0.041630 0.038044 0.037920 [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 7.93e-08 7.03e-08 4.28e-08 3.95e-08 2.09e-07 2.31e-07 erg/cm2
Error 1.94e-08 2.13e-08 2.63e-08 5.16e-08 6.46e-08 9.12e-08 erg/cm2
Peak flux Power-law 4.10e-02 2.03e-02 6.20e-03 2.40e-03 6.89e-02 6.99e-02 ph/cm2/s
Error 1.03e-02 5.89e-03 3.68e-03 2.95e-03 1.55e-02 1.60e-02 ph/cm2/s
Fluence Cutoff-PL 7.93e-08 8.21e-08 1.40e-08 1.55e-10 1.75e-07 1.75e-07 erg/cm2
Error 2.14e-08 2.85e-08 2.85e-08 3.21e-08 5.52e-08 4.77e-08 erg/cm2
Peak flux Cutoff-PL 4.10e-02 2.03e-02 6.19e-03 2.38e-03 6.89e-02 6.99e-02 ph/cm2/s
Error 1.02e-02 5.89e-03 3.68e-03 2.93e-03 1.55e-02 1.60e-02 ph/cm2/s
Fluence Band 7.95e-08 8.17e-08 1.40e-08 7.05e-10 1.76e-07 1.77e-07 erg/cm2
Error 2.09e-08 2.61e-08 1.12e-08 2.63e-08 5.67e-08 7.25e-08 erg/cm2
Peak flux Band 4.02e-02 2.35e-02 3.27e-03 1.30e-04 6.70e-02 6.80e-02 ph/cm2/s
Error 1.10e-02 7.45e-03 3.77e-03 1.00e-03 1.50e-02 1.55e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.715 0.558 - - 3.06e-04 1.40e-04 66.737 57
CPL 0.097 0.000 21.4 14.8 2.10e-02 9.18e-01 64.691 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.715 0.558 - - 3.06e-04 1.40e-04 66.737 57
CPL 0.097 0.000 21.4 14.8 2.10e-02 9.18e-01 64.691 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
104.5095 -7.2340 0.0331 17.9 34.3 0.5036 5.8 TRIG_00297116
------------------------------------------
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.
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: 2.71535 ( -0.495184 0.619847 )
Norm@50keV : 3.055363E-04 ( -1.349690E-04 1.449451E-04) )
------------------------------------------------------------
Chi-Squared = 66.73674 using 59 PHA bins.
Reduced chi-squared = 1.170820 for 57 degrees of freedom
Null hypothesis probability = 0.177
Photon flux (15-150 keV) in 64.00 sec: 6.890333E-02 ( -0.0154591 0.0155333 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.09201e-07 ( -6.09011e-08 6.83661e-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: 9.692421E-02 ( )
Epeak [keV] : 21.4133 ( -21.6171 8.07477 )
Norm@50keV : 2.104893E-02 ( -2.399261E-02 1.81237 )
------------------------------------------------------------
Chi-Squared = 64.69147 using 59 PHA bins.
Reduced chi-squared = 1.155205 for 56 degrees of freedom
Null hypothesis probability = 0.199
Photon flux (15-150 keV) in 64.00 sec: 6.888050E-02 ( -0.0154567 0.0155282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75481e-07 ( -4.42554e-08 6.62432e-08 ) 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 : -1.47219 ( -8.52781 6.47219 )
beta : -9.16804 ( -5.86196 1.75296 )
Epeak [keV] : 13.7410 ( -13.1073 92.2439 )
Norm@50keV : 2.101134E-03 ( -5.798880E-02 457.510 )
------------------------------------------------------------
Chi-Squared = 65.38930 using 59 PHA bins.
Reduced chi-squared = 1.188896 for 55 degrees of freedom
Null hypothesis probability = 0.159
Photon flux (15-150 keV) in 64.00 sec: 6.703624E-02 ( -0.0145907 0.0153478 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75592e-07 ( -4.06106e-08 7.27706e-08 ) 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: 2.71535 ( -0.495184 0.619847 )
Norm@50keV : 3.055363E-04 ( -1.349690E-04 1.449451E-04) )
------------------------------------------------------------
Chi-Squared = 66.73674 using 59 PHA bins.
Reduced chi-squared = 1.170820 for 57 degrees of freedom
Null hypothesis probability = 0.177
Photon flux (15-150 keV) in 64.00 sec: 6.890333E-02 ( -0.0154591 0.0155333 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.09201e-07 ( -6.09011e-08 6.83661e-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: 9.692421E-02 ( )
Epeak [keV] : 21.4133 ( -21.6171 8.07477 )
Norm@50keV : 2.104893E-02 ( -2.399261E-02 1.81237 )
------------------------------------------------------------
Chi-Squared = 64.69147 using 59 PHA bins.
Reduced chi-squared = 1.155205 for 56 degrees of freedom
Null hypothesis probability = 0.199
Photon flux (15-150 keV) in 64.00 sec: 6.888050E-02 ( -0.0154567 0.0155282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75481e-07 ( -4.42554e-08 6.62432e-08 ) 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 : -1.47219 ( -8.52781 6.47219 )
beta : -9.16804 ( -5.86196 1.75296 )
Epeak [keV] : 13.7410 ( -13.1073 92.2439 )
Norm@50keV : 2.101134E-03 ( -5.798880E-02 457.510 )
------------------------------------------------------------
Chi-Squared = 65.38930 using 59 PHA bins.
Reduced chi-squared = 1.188896 for 55 degrees of freedom
Null hypothesis probability = 0.159
Photon flux (15-150 keV) in 64.00 sec: 6.703624E-02 ( -0.0145907 0.0153478 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75592e-07 ( -4.06106e-08 7.27706e-08 ) ergs/cm2
Plot creation:
Sat Dec 15 02:15:23 EST 2007