batgrbproduct Analysis for Trigger=100970
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 19:27:22 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger100970/GCN_download_cron
======================================================================
Trigger: 00100970 Segment: 000
BAT Trigger Time: 125923753.472 [s; MET]
Trigger Stop: 125923769.856 [s; MET]
UTC: 2004-12-28T10:49:14.142460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 336.648289388184 Dec: 5.03633072641599 [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: 26.7955220139485 [ if not an image trigger ]
Image S/N Ratio: 16
Flight Position: [ source = BAT ]
RA: 336.648289388184 Dec: 5.03633072641599 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 336.644243527894 Dec: 5.02866165885539 [deg; J2000]
{ 22h 26m 34.6s , +05d 01' 43.2" }
+/- 0.889867914790991 [arcmin] (estimated 90% radius based on SNR)
+/- 0.31449157898837 [arcmin] (formal 1-sigma fit error)
SNR: 35.9344046648944
RA = 22h 26m 34.6s (336.644244 deg.)
Dec = 5d 1' 43" (5.028662 deg.)
Angular difference between Flight and Ground position is 0.519815 arcmin
Partial Coding Fraction: 0.4257812 [ including projection effects ]
Duration
T90: 55.3800000101328 +/- 7.79659541734258
Measured from: 2.26799999177456
to: 57.6480000019073 [s; relative to TRIGTIME]
T50: 19.7840000092983 +/- 2.28643302298023
Measured from: 10.7800000011921
to: 30.5640000104904 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 22.027999997139
to: 23.027999997139 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.395999997854233
to: 70.640000000596 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.493801 1.912340 1.495049 0.411844
0.070492 0.071604 0.061648 0.053751 [error]
Peak 0.061754 0.057114 0.047539 0.018044
0.008701 0.009070 0.007712 0.006387 [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 5.23e-07 9.05e-07 1.19e-06 3.20e-06 3.49e-06 5.80e-06 erg/cm2
Error 4.56e-08 4.50e-08 6.21e-08 3.87e-07 1.52e-07 4.17e-07 erg/cm2
Peak flux Power-law 6.02e-01 5.40e-01 3.33e-01 3.12e-01 1.61e+00 1.79e+00 ph/cm2/s
Error 1.56e-01 8.55e-02 6.46e-02 1.24e-01 2.50e-01 2.63e-01 ph/cm2/s
Fluence Cutoff-PL 5.23e-07 9.06e-07 1.19e-06 3.18e-06 3.49e-06 5.54e-06 erg/cm2
Error 4.56e-08 4.50e-08 6.22e-08 3.84e-07 1.52e-07 6.35e-07 erg/cm2
Peak flux Cutoff-PL 6.02e-01 5.40e-01 3.33e-01 3.10e-01 1.61e+00 1.78e+00 ph/cm2/s
Error 1.56e-01 8.55e-02 6.47e-02 1.24e-01 2.50e-01 2.63e-01 ph/cm2/s
Fluence Band 5.19e-07 9.02e-07 1.19e-06 3.20e-06 3.49e-06 5.83e-06 erg/cm2
Error 2.47e-08 3.80e-08 5.19e-08 1.35e-07 1.47e-07 2.46e-07 erg/cm2
Peak flux Band 6.00e-01 5.44e-01 3.33e-01 3.09e-01 1.61e+00 1.81e+00 ph/cm2/s
Error 1.68e-01 9.49e-02 5.73e-02 1.18e-01 2.49e-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 1.601 0.082 - - 5.25e-03 2.22e-04 68.341 57
CPL 1.588 0.083 9930.3 0.0 5.27e-03 2.22e-04 68.414 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.697 0.269 - - 1.21e-02 1.86e-03 46.449 57
CPL 1.708 1.024 9485.0 5000.0 1.21e-02 8.86e-03 46.458 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: 36.736000 sec.
T50 in the 50-300 keV band: 18.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 71.036 -0.396 70.640
T90 55.380 2.268 57.648
T50 19.784 10.780 30.564
Peak 1.000 22.028 23.028
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
336.6442 +5.0287 0.0054 45.6 -169.4 5.7139 35.9 TRIG_00100970
------------------------------------------
Foreground time interval of the image:
-0.396 70.640 (delta_t = 71.036 [sec])
Background time interval of the image:
-299.472 -0.396 (delta_t = 299.076 [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 -0.396 sec. to 70.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60113 ( -8.196473E-02 8.200133E-02) )
Norm@50keV : 5.251821E-03 ( -2.215258E-04 2.215174E-04) )
------------------------------------------------------------
Chi-Squared = 68.34126 using 59 PHA bins.
Reduced chi-squared = 1.198969 for 57 degrees of freedom
Null hypothesis probability = 0.144
Photon flux (15-150 keV) in 71.04 sec: 0.675119 ( -0.032874 0.033065 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48865e-06 ( -1.51614e-07 1.5194e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.396 sec. to 70.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58822 ( -7.243359E-02 9.397578E-02) )
Epeak [keV] : 9930.31 ( )
Norm@50keV : 5.265174E-03 ( -2.221386E-04 2.221032E-04) )
------------------------------------------------------------
Chi-Squared = 68.41412 using 59 PHA bins.
Reduced chi-squared = 1.221681 for 56 degrees of freedom
Null hypothesis probability = 0.123
Photon flux (15-150 keV) in 71.04 sec: 0.674752 ( -0.032856 0.033049 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4893e-06 ( -1.51727e-07 1.5194e-07 ) ergs/cm2
Band function
Time interval is from -0.396 sec. to 70.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32870 ( -8.67130 6.32870 )
beta : -1.60107 ( -8.206022E-02 8.190632E-02) )
Epeak [keV] : 19.5160 ( -19.4160 9980.47 )
Norm@50keV : 1.139164E-02 ( -1.139164E-02 205.837 )
------------------------------------------------------------
Chi-Squared = 68.34128 using 59 PHA bins.
Reduced chi-squared = 1.242569 for 55 degrees of freedom
Null hypothesis probability = 0.107
Photon flux (15-150 keV) in 71.04 sec: 0.827745 ( -0.180732 2172.9 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48748e-06 ( -1.47131e-07 1.47081e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 22.028 sec. to 23.028 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69702 ( -0.265296 0.272620 )
Norm@50keV : 1.210828E-02 ( -1.868426E-03 1.843103E-03) )
------------------------------------------------------------
Chi-Squared = 46.44929 using 59 PHA bins.
Reduced chi-squared = 0.8148999 for 57 degrees of freedom
Null hypothesis probability = 0.840
Photon flux (15-150 keV) in 1.000 sec: 1.60643 ( -0.24977 0.25076 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12187e-07 ( -1.79498e-08 1.7973e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.028 sec. to 23.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70789 ( -0.777143 1.27173 )
Epeak [keV] : 9484.95 ( -9484.95 515.045 )
Norm@50keV : 1.210673E-02 ( -1.856278E-03 1.585740E-02) )
------------------------------------------------------------
Chi-Squared = 46.45779 using 59 PHA bins.
Reduced chi-squared = 0.8296033 for 56 degrees of freedom
Null hypothesis probability = 0.815
Photon flux (15-150 keV) in 1.000 sec: 1.60588 ( -0.24971 0.25067 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12125e-07 ( -1.78494e-08 1.8042e-08 ) ergs/cm2
Band function
Time interval is from 22.028 sec. to 23.028 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31438 ( -10.6907 4.30930 )
beta : -1.70306 ( -0.332038 0.262839 )
Epeak [keV] : 39.4138 ( -25.1948 9954.24 )
Norm@50keV : 2.444182E-02 ( -0.901331 6485.23 )
------------------------------------------------------------
Chi-Squared = 46.38401 using 59 PHA bins.
Reduced chi-squared = 0.8433457 for 55 degrees of freedom
Null hypothesis probability = 0.789
Photon flux (15-150 keV) in 1.000 sec: 1.60761 ( -0.26026 0.23765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11995e-07 ( -1.69678e-08 2.5085e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 19:37:35 EST 2008