batgrbproduct Analysis for Trigger=114299
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): Fri Jan 4 23:40:43 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger114299/SDC
======================================================================
Trigger: 00114299 Segment: 000
BAT Trigger Time: 134828073.024 [s; MET]
Trigger Stop: 134828089.408 [s; MET]
UTC: 2005-04-10T12:14:33.553380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 89.7495264610994 Dec: 79.5985922952754 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16
Image Trigger?: NO
Rate S/N Ratio: 20.4939015319192 [ if not an image trigger ]
Image S/N Ratio: 16
Flight Position: [ source = BAT ]
RA: 89.7495264610994 Dec: 79.5985922952754 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 89.7547903266624 Dec: 79.6052594197078 [deg; J2000]
{ 05h 59m 01.1s , +79d 36' 18.9" }
+/- 1.19684013818367 [arcmin] (estimated 90% radius based on SNR)
+/- 0.455811590591927 [arcmin] (formal 1-sigma fit error)
SNR: 23.5308801567128
RA = 5h 59m 1.1s (89.754790 deg.)
Dec = 79d 36' 19" (79.605259 deg.)
Angular difference between Flight and Ground position is 0.404068 arcmin
Partial Coding Fraction: 0.1367188 [ including projection effects ]
Duration
T90: 64 +/- 16
Measured from: -27.0239999890327
to: 36.9760000109673 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -11.0239999890327
to: 20.9760000109673 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -3.52399998903275
to: -2.52399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: -27.0239999890327
to: 36.9760000109673 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.735579 2.638105 1.987493 0.455614
0.101238 0.108202 0.095029 0.076219 [error]
Peak 0.661963 0.989941 0.664910 0.128600
0.052785 0.056883 0.049592 0.038818 [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 7.04e-07 1.20e-06 1.56e-06 4.09e-06 4.58e-06 7.55e-06 erg/cm2
Error 6.05e-08 6.26e-08 9.37e-08 5.29e-07 2.31e-07 5.95e-07 erg/cm2
Peak flux Power-law 5.35e-01 4.81e-01 2.98e-01 2.81e-01 1.43e+00 1.60e+00 ph/cm2/s
Error 6.06e-02 3.46e-02 2.58e-02 4.81e-02 1.02e-01 1.08e-01 ph/cm2/s
Fluence Cutoff-PL 6.05e-07 1.28e-06 1.66e-06 1.72e-06 4.41e-06 5.23e-06 erg/cm2
Error 7.51e-08 7.55e-08 1.10e-07 6.96e-07 2.49e-07 7.23e-07 erg/cm2
Peak flux Cutoff-PL 4.56e-01 5.25e-01 3.22e-01 1.20e-01 1.38e+00 1.42e+00 ph/cm2/s
Error 7.29e-02 4.32e-02 3.08e-02 5.61e-02 1.05e-01 1.19e-01 ph/cm2/s
Fluence Band 6.01e-07 1.28e-06 1.65e-06 2.14e-06 4.40e-06 5.67e-06 erg/cm2
Error 7.56e-08 7.71e-08 1.18e-07 1.08e-06 2.49e-07 1.09e-06 erg/cm2
Peak flux Band 4.56e-01 5.25e-01 3.21e-01 1.34e-01 1.38e+00 1.43e+00 ph/cm2/s
Error 7.31e-02 3.37e-02 3.39e-02 6.22e-02 1.03e-01 1.34e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.622 0.083 - - 7.68e-03 3.70e-04 72.806 57
CPL 0.883 0.386 79.3 19.9 1.75e-02 7.69e-03 60.073 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.690 0.113 - - 1.08e-02 7.57e-04 61.632 57
CPL 0.770 0.540 66.3 16.7 3.19e-02 2.19e-02 51.105 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: 40.832000 sec.
T50 in the 50-300 keV band: 22.400000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -27.024 36.976
T90 64.000 -27.024 36.976
T50 32.000 -11.024 20.976
Peak 1.000 -3.524 -2.524
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
89.7548 +79.6053 0.0082 42.8 -56.5 6.9327 23.5 TRIG_00114299
------------------------------------------
Foreground time interval of the image:
-27.024 36.976 (delta_t = 64.000 [sec])
Background time interval of the image:
-299.024 -27.024 (delta_t = 272.000 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -27.024 sec. to 36.976 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62241 ( -8.294928E-02 8.321047E-02) )
Norm@50keV : 7.677269E-03 ( -3.702911E-04 3.699786E-04) )
------------------------------------------------------------
Chi-Squared = 72.80645 using 59 PHA bins.
Reduced chi-squared = 1.277306 for 57 degrees of freedom
Null hypothesis probability = 7.732E-02
Photon flux (15-150 keV) in 64.00 sec: 0.993533 ( -0.051354 0.051507 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58264e-06 ( -2.2992e-07 2.31219e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.024 sec. to 36.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882776 ( -0.404588 0.367689 )
Epeak [keV] : 79.2863 ( -11.9101 27.8590 )
Norm@50keV : 1.748196E-02 ( -5.757541E-03 9.627379E-03) )
------------------------------------------------------------
Chi-Squared = 60.07309 using 59 PHA bins.
Reduced chi-squared = 1.072734 for 56 degrees of freedom
Null hypothesis probability = 0.330
Photon flux (15-150 keV) in 64.00 sec: 0.956603 ( -0.054211 0.054367 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41311e-06 ( -2.48442e-07 2.49805e-07 ) ergs/cm2
Band function
Time interval is from -27.024 sec. to 36.976 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.865083 ( -0.434905 0.542221 )
beta : -2.54676 ( -7.45324 0.682957 )
Epeak [keV] : 78.0688 ( -20.6313 28.7170 )
Norm@50keV : 1.789061E-02 ( -6.129051E-03 1.869539E-02) )
------------------------------------------------------------
Chi-Squared = 60.02730 using 59 PHA bins.
Reduced chi-squared = 1.091406 for 55 degrees of freedom
Null hypothesis probability = 0.299
Photon flux (15-150 keV) in 64.00 sec: 0.955379 ( -0.053981 0.055141 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40294e-06 ( -2.49062e-07 2.48461e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -11.024 sec. to 4.976 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69025 ( -0.112595 0.113830 )
Norm@50keV : 1.082510E-02 ( -7.588910E-04 7.560998E-04) )
------------------------------------------------------------
Chi-Squared = 61.63215 using 59 PHA bins.
Reduced chi-squared = 1.081266 for 57 degrees of freedom
Null hypothesis probability = 0.314
Photon flux (15-150 keV) in 16.00 sec: 1.43283 ( -0.10143 0.10164 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60506e-06 ( -1.16776e-07 1.17248e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.024 sec. to 4.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.770135 ( -0.574095 0.506341 )
Epeak [keV] : 66.3072 ( -10.0440 23.3438 )
Norm@50keV : 3.189332E-02 ( -1.404982E-02 2.976846E-02) )
------------------------------------------------------------
Chi-Squared = 51.10487 using 59 PHA bins.
Reduced chi-squared = 0.9125870 for 56 degrees of freedom
Null hypothesis probability = 0.660
Photon flux (15-150 keV) in 16.00 sec: 1.38489 ( -0.10497 0.10505 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52951e-06 ( -1.24693e-07 1.26134e-07 ) ergs/cm2
Band function
Time interval is from -11.024 sec. to 4.976 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.772795 ( -0.502850 1.09268 )
beta : -3.09926 ( -6.90074 1.18416 )
Epeak [keV] : 66.2239 ( -11.4229 23.3747 )
Norm@50keV : 3.182678E-02 ( -1.396390E-02 4.996678E-02) )
------------------------------------------------------------
Chi-Squared = 51.09739 using 59 PHA bins.
Reduced chi-squared = 0.9290434 for 55 degrees of freedom
Null hypothesis probability = 0.624
Photon flux (15-150 keV) in 16.00 sec: 1.38481 ( -0.10045 0.10496 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52867e-06 ( -1.24722e-07 1.25574e-07 ) ergs/cm2
Plot creation:
Fri Jan 4 23:50:44 EST 2008