batgrbproduct Analysis for Trigger=292934
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 Dec 14 17:07:00 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger292934/GCN5_download_cron
======================================================================
Trigger: 00292934 Segment: 000
BAT Trigger Time: 213090057.28 [s; MET]
Trigger Stop: 213090058.304 [s; MET]
UTC: 2007-10-03T07:40:55.014420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 301.855657563997 Dec: 10.9597786609722 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.83
Image Trigger?: NO
Rate S/N Ratio: 105.73551910309 [ if not an image trigger ]
Image S/N Ratio: 17.83
Flight Position: [ source = BAT ]
RA: 301.855657563997 Dec: 10.9597786609722 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 301.857423809682 Dec: 10.9543057615095 [deg; J2000]
{ 20h 07m 25.8s , +10d 57' 15.5" }
+/- 0.872634605153303 [arcmin] (estimated 90% radius based on SNR)
+/- 0.353429734508708 [arcmin] (formal 1-sigma fit error)
SNR: 36.9524704230452
RA = 20h 7m 25.8s (301.857424 deg.)
Dec = 10d 57' 16" (10.954306 deg.)
Angular difference between Flight and Ground position is 0.344462 arcmin
Partial Coding Fraction: 0.34375 [ including projection effects ]
Duration
T90: 148.127999991179 +/- 4.49440006564942
Measured from: -1.47999998927116
to: 146.648000001907 [s; relative to TRIGTIME]
T50: 18.5840000212193 +/- 2.23092806007321
Measured from: 2.49599999189377
to: 21.080000013113 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.372000008821487
to: 1.37200000882149 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.56000000238419
to: 167.351999998093 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.948026 4.370294 3.736928 1.037805
0.122161 0.119379 0.109447 0.102194 [error]
Peak 0.139854 0.245855 0.315585 0.103002
0.012308 0.014114 0.015619 0.013407 [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 9.47e-07 1.90e-06 2.97e-06 1.02e-05 8.27e-06 1.60e-05 erg/cm2
Error 6.83e-08 7.69e-08 1.15e-07 9.62e-07 2.83e-07 1.00e-06 erg/cm2
Peak flux Power-law 1.21e+00 1.81e+00 2.01e+00 4.22e+00 6.31e+00 9.26e+00 ph/cm2/s
Error 1.63e-01 1.43e-01 1.21e-01 5.97e-01 3.72e-01 6.26e-01 ph/cm2/s
Fluence Cutoff-PL 9.46e-07 1.90e-06 2.97e-06 1.01e-05 8.27e-06 1.52e-05 erg/cm2
Error 6.83e-08 7.70e-08 1.15e-07 9.56e-07 2.83e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.21e+00 1.81e+00 2.01e+00 4.20e+00 6.31e+00 9.23e+00 ph/cm2/s
Error 1.63e-01 1.43e-01 1.22e-01 5.93e-01 3.72e-01 6.23e-01 ph/cm2/s
Fluence Band 9.15e-07 1.63e-05 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 5.29e-07 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 1.21e+00 1.81e+00 2.01e+00 4.20e+00 6.31e+00 9.23e+00 ph/cm2/s
Error 1.63e-01 1.43e-01 1.22e-01 5.93e-01 3.72e-01 6.23e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.357 0.066 - - 4.85e-03 1.58e-04 49.262 57
CPL 1.354 0.066 9992.3 5000.0 4.86e-03 1.58e-04 49.293 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.847 0.110 - - 5.50e-02 3.27e-03 48.526 57
CPL 0.839 0.111 9992.6 5000.0 5.54e-02 3.28e-03 48.539 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: 152.640000 sec.
T50 in the 50-300 keV band: 14.784000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 174.912 -7.560 167.352
T90 148.128 -1.480 146.648
T50 18.584 2.496 21.080
Peak 1.000 0.372 1.372
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
301.8574 +10.9543 0.0052 31.7 57.9 11.2964 37.0 TRIG_00292934
------------------------------------------
Foreground time interval of the image:
-7.560 122.621 (delta_t = 130.181 [sec])
Background time interval of the image:
-239.280 -7.560 (delta_t = 231.720 [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 -7.560 sec. to 167.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35722 ( -6.569076E-02 6.540930E-02) )
Norm@50keV : 4.846576E-03 ( -1.577889E-04 1.576999E-04) )
------------------------------------------------------------
Chi-Squared = 49.26227 using 59 PHA bins.
Reduced chi-squared = 0.8642503 for 57 degrees of freedom
Null hypothesis probability = 0.757
Photon flux (15-150 keV) in 174.9 sec: 0.584749 ( -0.021332 0.021422 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26598e-06 ( -2.82883e-07 2.83548e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.560 sec. to 167.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35355 ( -6.614649E-02 6.584060E-02) )
Epeak [keV] : 9992.28 ( -9992.27 7.72266 )
Norm@50keV : 4.864328E-03 ( -1.576403E-04 1.587048E-04) )
------------------------------------------------------------
Chi-Squared = 49.29316 using 59 PHA bins.
Reduced chi-squared = 0.8802350 for 56 degrees of freedom
Null hypothesis probability = 0.725
Photon flux (15-150 keV) in 174.9 sec: 0.584439 ( -0.021319 0.021412 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26712e-06 ( -2.82866e-07 2.8381e-07 ) ergs/cm2
Band function
Time interval is from -7.560 sec. to 167.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.966383 ( -9.03362 3.82823 )
beta : -1.36174 ( -7.480216E-02 6.921983E-02) )
Epeak [keV] : 66.3836 ( -66.2836 9933.62 )
Norm@50keV : 9.419704E-03 ( -9.419705E-03 342.732 )
------------------------------------------------------------
Chi-Squared = 49.19139 using 59 PHA bins.
Reduced chi-squared = 0.8943889 for 55 degrees of freedom
Null hypothesis probability = 0.695
Photon flux (15-150 keV) in 174.9 sec: 0.584034 ( -0.020572 0.018914 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846500 ( -0.110869 0.109144 )
Norm@50keV : 5.499765E-02 ( -3.282085E-03 3.260966E-03) )
------------------------------------------------------------
Chi-Squared = 48.52555 using 59 PHA bins.
Reduced chi-squared = 0.8513255 for 57 degrees of freedom
Null hypothesis probability = 0.780
Photon flux (15-150 keV) in 1.000 sec: 6.31359 ( -0.37186 0.37291 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30489e-07 ( -3.9411e-08 3.9549e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.839221 ( -0.111826 0.110038 )
Epeak [keV] : 9992.59 ( -9992.58 7.40820 )
Norm@50keV : 5.537849E-02 ( -3.293935E-03 3.273871E-03) )
------------------------------------------------------------
Chi-Squared = 48.53908 using 59 PHA bins.
Reduced chi-squared = 0.8667693 for 56 degrees of freedom
Null hypothesis probability = 0.750
Photon flux (15-150 keV) in 1.000 sec: 6.31186 ( -0.37172 0.37278 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30998e-07 ( -3.9571e-08 3.9459e-08 ) ergs/cm2
Band function
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.902085 ( -9.09791 5.90209 )
beta : -0.846501 ( -0.109136 0.110869 )
Epeak [keV] : 16.8948 ( -16.7948 9983.11 )
Norm@50keV : 7.567876E-02 ( -1.781976E-02 1.321420E+06) )
------------------------------------------------------------
Chi-Squared = 48.52554 using 59 PHA bins.
Reduced chi-squared = 0.8822824 for 55 degrees of freedom
Null hypothesis probability = 0.719
Photon flux (15-150 keV) in 1.000 sec: 6.31193 ( -0.37207 0.37227 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30322e-07 ( -3.9438e-08 3.9542e-08 ) ergs/cm2
Plot creation:
Fri Dec 14 17:41:36 EST 2007