batgrbproduct Analysis for Trigger=100433
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 18:30:55 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger100433/GCN_download_cron
======================================================================
Trigger: 00100433 Segment: 000
BAT Trigger Time: 125276305.92 [s; MET]
Trigger Stop: 125276306.944 [s; MET]
UTC: 2004-12-20T22:58:26.599560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.241207804425 Dec: 60.6860958775226 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17
Image Trigger?: NO
Rate S/N Ratio: 47.5184174820669 [ if not an image trigger ]
Image S/N Ratio: 17
Flight Position: [ source = BAT ]
RA: 291.241207804425 Dec: 60.6860958775226 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 291.280751410658 Dec: 60.6006973511897 [deg; J2000]
{ 19h 25m 07.4s , +60d 36' 02.5" }
+/- 0.958764129983551 [arcmin] (estimated 90% radius based on SNR)
+/- 0.318801658328038 [arcmin] (formal 1-sigma fit error)
SNR: 32.3031156402186
RA = 19h 25m 7.4s (291.280751 deg.)
Dec = 60d 36' 3" (60.600697 deg.)
Angular difference between Flight and Ground position is 5.254275 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 5.03600001335144 +/- 1.11830049478394
Measured from: -0.0240000039339066
to: 5.01200000941753 [s; relative to TRIGTIME]
T50: 2.19600000977516 +/- 0.322490315846379
Measured from: 0.508000001311302
to: 2.70400001108646 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0240000039339066
to: 0.975999996066093 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.208000004291534
to: 6.81199999153614 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.211617 0.252988 0.154666 0.035119
0.013252 0.013794 0.011949 0.009651 [error]
Peak 0.061484 0.077160 0.079122 0.016678
0.005516 0.006029 0.005570 0.004097 [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 6.13e-08 1.02e-07 1.29e-07 3.26e-07 3.83e-07 6.16e-07 erg/cm2
Error 6.86e-09 6.75e-09 1.20e-08 6.55e-08 2.79e-08 7.47e-08 erg/cm2
Peak flux Power-law 5.16e-01 5.85e-01 4.75e-01 6.43e-01 1.81e+00 2.22e+00 ph/cm2/s
Error 7.72e-02 5.22e-02 4.47e-02 1.30e-01 1.45e-01 1.80e-01 ph/cm2/s
Fluence Cutoff-PL 6.13e-08 1.02e-07 1.29e-07 3.23e-07 3.83e-07 5.18e-07 erg/cm2
Error 6.86e-09 6.76e-09 1.20e-08 6.50e-08 2.79e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.99e-01 5.92e-01 4.85e-01 5.43e-01 1.80e+00 2.12e+00 ph/cm2/s
Error 9.52e-02 5.65e-02 5.23e-02 2.27e-01 1.49e-01 2.96e-01 ph/cm2/s
Fluence Band 5.95e-08 1.03e-07 1.29e-07 3.03e-07 3.80e-07 5.99e-07 erg/cm2
Error 6.81e-09 8.65e-09 1.27e-08 4.45e-08 3.06e-08 1.15e-07 erg/cm2
Peak flux Band 4.97e-01 5.92e-01 4.84e-01 5.43e-01 1.80e+00 2.12e+00 ph/cm2/s
Error 9.51e-02 5.73e-02 5.37e-02 2.27e-01 1.50e-01 2.77e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.662 0.123 - - 5.88e-03 3.99e-04 28.925 57
CPL 1.534 0.355 174.6 0.0 6.81e-03 3.04e-03 28.900 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.301 0.141 - - 1.52e-02 1.18e-03 60.508 57
CPL 1.134 0.440 286.5 5000.0 1.81e-02 9.50e-03 60.243 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: 2.048000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 7.020 -0.208 6.812
T90 5.036 -0.024 5.012
T50 2.196 0.508 2.704
Peak 1.000 -0.024 0.976
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
291.2808 +60.6007 0.0060 15.6 -110.0 0.8071 32.3 TRIG_00100433
------------------------------------------
Foreground time interval of the image:
-0.208 6.812 (delta_t = 7.020 [sec])
Background time interval of the image:
-299.920 -0.208 (delta_t = 299.712 [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 -0.208 sec. to 6.812 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66206 ( -0.121890 0.123544 )
Norm@50keV : 5.877605E-03 ( -4.014750E-04 3.974861E-04) )
------------------------------------------------------------
Chi-Squared = 28.92476 using 59 PHA bins.
Reduced chi-squared = 0.5074519 for 57 degrees of freedom
Null hypothesis probability = 0.999
Photon flux (15-150 keV) in 7.020 sec: 0.770552 ( -0.050947 0.051087 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.83259e-07 ( -2.77416e-08 2.80182e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.208 sec. to 6.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53388 ( -0.459209 0.250213 )
Epeak [keV] : 174.625 ( )
Norm@50keV : 6.813840E-03 ( -6.437888E-04 5.426785E-03) )
------------------------------------------------------------
Chi-Squared = 28.90047 using 59 PHA bins.
Reduced chi-squared = 0.5160798 for 56 degrees of freedom
Null hypothesis probability = 0.999
Photon flux (15-150 keV) in 7.020 sec: 0.767176 ( -0.051032 0.053374 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.83294e-07 ( -2.77508e-08 2.80245e-08 ) ergs/cm2
Band function
Time interval is from -0.208 sec. to 6.812 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46595 ( -8.53405 2.54770 )
beta : -1.74176 ( -8.25823 0.197367 )
Epeak [keV] : 117.749 ( -117.649 9882.25 )
Norm@50keV : 7.535551E-03 ( -2.040073E-03 64876.4 )
------------------------------------------------------------
Chi-Squared = 28.74049 using 59 PHA bins.
Reduced chi-squared = 0.5225544 for 55 degrees of freedom
Null hypothesis probability = 0.999
Photon flux (15-150 keV) in 7.020 sec: 0.765135 ( -0.027363 0.053987 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.79602e-07 ( -3.09877e-08 3.02316e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30074 ( -0.140865 0.141128 )
Norm@50keV : 1.518301E-02 ( -1.181703E-03 1.180403E-03) )
------------------------------------------------------------
Chi-Squared = 60.50824 using 59 PHA bins.
Reduced chi-squared = 1.061548 for 57 degrees of freedom
Null hypothesis probability = 0.350
Photon flux (15-150 keV) in 1.000 sec: 1.81162 ( -0.14481 0.1451 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49995e-07 ( -1.3062e-08 1.3164e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13439 ( -0.581551 0.297558 )
Epeak [keV] : 286.538 ( -286.528 9713.46 )
Norm@50keV : 1.813903E-02 ( -4.021760E-03 1.498171E-02) )
------------------------------------------------------------
Chi-Squared = 60.24264 using 59 PHA bins.
Reduced chi-squared = 1.075761 for 56 degrees of freedom
Null hypothesis probability = 0.325
Photon flux (15-150 keV) in 1.000 sec: 1.79952 ( -0.15016 0.14765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49089e-07 ( -1.3318e-08 1.311e-08 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03424 ( -8.96576 6.03248 )
beta : -1.30069 ( -8.38836 0.444768 )
Epeak [keV] : 47.6026 ( -304.710 9695.19 )
Norm@50keV : 2.830101E-02 ( -3.821343E-03 972.273 )
------------------------------------------------------------
Chi-Squared = 60.50830 using 59 PHA bins.
Reduced chi-squared = 1.100151 for 55 degrees of freedom
Null hypothesis probability = 0.284
Photon flux (15-150 keV) in 1.000 sec: 1.79959 ( -0.15028 0.14974 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48932e-07 ( -1.3702e-08 1.3526e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 18:41:39 EST 2008