batgrbproduct Analysis for Trigger=214277
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): Tue Jan 1 16:51:14 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger214277/GCN5_download_cron
======================================================================
Trigger: 00214277 Segment: 000
BAT Trigger Time: 171615182.048 [s; MET]
Trigger Stop: 171615182.432 [s; MET]
UTC: 2006-06-10T06:53:00.801220 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 32 ms to TRIGTIME + 320 ms
BAT
RA: 286.791307453051 Dec: 9.32276567087493 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.24
Image Trigger?: NO
Rate S/N Ratio: 11.3137084989848 [ if not an image trigger ]
Image S/N Ratio: 7.24
Flight Position: [ source = BAT ]
RA: 286.791307453051 Dec: 9.32276567087493 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 286.781789674915 Dec: 9.33617801982075 [deg; J2000]
{ 19h 07m 07.6s , +09d 20' 10.2" }
+/- 2.68901969727763 [arcmin] (estimated 90% radius based on SNR)
+/- 1.81050431079174 [arcmin] (formal 1-sigma fit error)
SNR: 7.40308420662386
RA = 19h 7m 7.6s (286.781790 deg.)
Dec = 9d 20' 10" (9.336178 deg.)
Angular difference between Flight and Ground position is 0.982423 arcmin
Partial Coding Fraction: 0.5390625 [ including projection effects ]
Duration
T90: 0.0240000188350677 +/- 0.00565686571343518
Measured from: 0.23199999332428
to: 0.256000012159348 [s; relative to TRIGTIME]
T50: 0.0160000026226044 +/- 0.00400000810623169
Measured from: 0.236000001430511
to: 0.252000004053116 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.254000008106232
to: 0.745999991893768 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.23199999332428
to: 0.255999982357025 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.009770 0.011160 0.003663 -0.001615
0.001983 0.002003 0.001353 0.000795 [error]
Peak 0.010222 0.011392 0.003680 -0.001073
0.002032 0.002044 0.001395 0.000897 [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 3.86e-09 1.20e-09 2.04e-10 3.98e-11 5.28e-09 5.35e-09 erg/cm2
Error 1.12e-09 5.23e-10 1.60e-10 5.52e-11 1.60e-09 1.62e-09 erg/cm2
Peak flux Power-law 4.77e+00 8.51e-01 7.25e-02 6.70e-03 5.69e+00 5.70e+00 ph/cm2/s
Error 1.42e+00 3.57e-01 6.69e-02 8.81e-03 1.69e+00 1.69e+00 ph/cm2/s
Fluence Cutoff-PL 3.85e-09 3.43e-09 2.40e-10 2.25e-13 7.52e-09 7.51e-09 erg/cm2
Error 1.29e-09 1.39e-09 2.47e-10 1.95e-12 1.95e-09 1.96e-09 erg/cm2
Peak flux Cutoff-PL 4.77e+00 8.50e-01 7.26e-02 6.67e-03 5.69e+00 5.69e+00 ph/cm2/s
Error 1.42e+00 3.58e-01 6.69e-02 8.76e-03 1.69e+00 1.69e+00 ph/cm2/s
Fluence Band 3.91e-09 3.27e-09 2.48e-10 1.73e-12 7.49e-09 5.26e-09 erg/cm2
Error 1.27e-09 2.04e-10 1.46e-12 1.92e-09 1.78e-09 0.00e+00 erg/cm2
Peak flux Band 3.97e+00 2.36e+00 9.13e-02 3.15e-04 6.95e+00 8.13e+00 ph/cm2/s
Error 7.91e-01 7.89e-02 4.88e-03 1.81e+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 4.544 0.694 - - 6.62e-03 5.47e-03 64.443 57
CPL -1.518 6.500 21.4 10.2 5.65e+01 0.00e+00 54.593 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.547 0.677 - - 5.64e-03 4.72e-03 65.981 57
CPL -1.740 2.099 21.9 9.1 6.80e+01 0.00e+00 55.260 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 0.024 0.232 0.256
T90 0.024 0.232 0.256
T50 0.016 0.236 0.252
Peak 1.000 -0.254 0.746
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
286.7818 +9.3362 0.0257 41.9 -169.4 0.0235 7.4 TRIG_00214277
------------------------------------------
Foreground time interval of the image:
0.200 0.224 (delta_t = 0.024 [sec])
Background time interval of the image:
-239.080 -218.290 (delta_t = 20.790 [sec])
-217.080 0.200 (delta_t = 217.280 [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 0.200 sec. to 0.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.54352 ( -0.513624 0.873797 )
Norm@50keV : 6.618287E-03 ( -6.618287E-03 4.324290E-03) )
------------------------------------------------------------
Chi-Squared = 64.44283 using 59 PHA bins.
Reduced chi-squared = 1.130576 for 57 degrees of freedom
Null hypothesis probability = 0.232
Photon flux (15-150 keV) in 2.4000E-02 sec: 6.60013 ( -1.91748 1.91557 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.28319e-09 ( -1.60394e-09 1.60313e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.200 sec. to 0.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.51776 ( -1.48224 11.5178 )
Epeak [keV] : 21.3843 ( -14.8559 5.46916 )
Norm@50keV : 56.5266 ( )
------------------------------------------------------------
Chi-Squared = 54.59340 using 59 PHA bins.
Reduced chi-squared = 0.9748822 for 56 degrees of freedom
Null hypothesis probability = 0.528
Photon flux (15-150 keV) in 2.4000E-02 sec: 6.59721 ( -1.91731 1.91698 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.51555e-09 ( -1.94498e-09 1.95648e-09 ) ergs/cm2
Band function
Time interval is from 0.200 sec. to 0.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.35613 ( -0.190815 0.381100 )
beta : -4.58118 ( -1.14964 3.56536 )
Epeak [keV] : 27.0989 ( -8.22496 8.22496 )
Norm@50keV : 0.860460 ( -65.9927 8240.49 )
------------------------------------------------------------
Chi-Squared = 64.44424 using 59 PHA bins.
Reduced chi-squared = 1.171713 for 55 degrees of freedom
Null hypothesis probability = 0.180
Photon flux (15-150 keV) in 2.4000E-02 sec: 7.90958 ( -2.01932 2.01697 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.48939e-09 ( -1.93944e-09 1.90111e-09 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.200 sec. to 0.228 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.54697 ( -0.518509 0.836289 )
Norm@50keV : 5.641078E-03 ( -5.641078E-03 3.790548E-03) )
------------------------------------------------------------
Chi-Squared = 65.98080 using 59 PHA bins.
Reduced chi-squared = 1.157558 for 57 degrees of freedom
Null hypothesis probability = 0.194
Photon flux (15-150 keV) in 2.8000E-02 sec: 5.69476 ( -1.68555 1.68564 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.32165e-09 ( -1.6326e-09 1.63593e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.200 sec. to 0.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.74022 ( -1.25978 2.93824 )
Epeak [keV] : 21.8526 ( -13.3515 4.91537 )
Norm@50keV : 68.0302 ( )
------------------------------------------------------------
Chi-Squared = 55.25980 using 59 PHA bins.
Reduced chi-squared = 0.9867821 for 56 degrees of freedom
Null hypothesis probability = 0.503
Photon flux (15-150 keV) in 2.8000E-02 sec: 5.69254 ( -1.68515 1.68565 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.58134e-09 ( -1.96854e-09 1.93147e-09 ) ergs/cm2
Band function
Time interval is from 0.200 sec. to 0.228 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.04645 ( -0.953552 14.0464 )
beta : -4.55780 ( -0.826192 0.529370 )
Epeak [keV] : 3.30566 ( -3.20566 9996.69 )
Norm@50keV : 0.759796 ( -0.461573 0.521772 )
------------------------------------------------------------
Chi-Squared = 65.98116 using 59 PHA bins.
Reduced chi-squared = 1.199657 for 55 degrees of freedom
Null hypothesis probability = 0.148
Photon flux (15-150 keV) in 2.8000E-02 sec: 6.95321 ( -1.83469 1.78005 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Jan 1 17:12:01 EST 2008