batgrbproduct Analysis for Trigger=103647
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 19:50:55 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger103647/SDC
======================================================================
Trigger: 00103647 Segment: 000
BAT Trigger Time: 128259002.24 [s; MET]
Trigger Stop: 128259002.752 [s; MET]
UTC: 2005-01-24T11:30:02.876080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 192.87863931207 Dec: 13.0264315169755 [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: 42.2729227756965 [ if not an image trigger ]
Image S/N Ratio: 17
Flight Position: [ source = BAT ]
RA: 192.87863931207 Dec: 13.0264315169755 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 192.878110389328 Dec: 13.037756065164 [deg; J2000]
{ 12h 51m 30.7s , +13d 02' 15.9" }
+/- 0.860548519218955 [arcmin] (estimated 90% radius based on SNR)
+/- 0.269483699924791 [arcmin] (formal 1-sigma fit error)
SNR: 37.6961012094329
RA = 12h 51m 30.7s (192.878110 deg.)
Dec = 13d 2' 16" (13.037756 deg.)
Angular difference between Flight and Ground position is 0.680176 arcmin
Partial Coding Fraction: 0.296875 [ including projection effects ]
Duration
T90: 4 +/- 1
Measured from: -1.23999999463558
to: 2.76000000536442 [s; relative to TRIGTIME]
T50: 2 +/- 1
Measured from: -0.239999994635582
to: 1.76000000536442 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.239999994635582
to: 0.760000005364418 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.23999999463558
to: 3.76000000536442 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.383262 0.648774 0.546042 0.126144
0.024938 0.027664 0.024722 0.016984 [error]
Peak 0.115446 0.245029 0.232527 0.047847
0.012178 0.014148 0.013710 0.008687 [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 1.55e-07 2.89e-07 4.16e-07 1.27e-06 1.18e-06 2.14e-06 erg/cm2
Error 1.37e-08 1.57e-08 2.34e-08 1.54e-07 5.90e-08 1.69e-07 erg/cm2
Peak flux Power-law 1.64e+00 1.83e+00 1.46e+00 1.92e+00 5.63e+00 6.84e+00 ph/cm2/s
Error 1.88e-01 1.34e-01 1.04e-01 2.72e-01 3.77e-01 4.43e-01 ph/cm2/s
Fluence Cutoff-PL 1.30e-07 3.08e-07 4.53e-07 5.43e-07 1.15e-06 1.37e-06 erg/cm2
Error 1.69e-08 1.85e-08 2.92e-08 1.94e-07 6.20e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.23e+00 2.01e+00 1.71e+00 7.58e-01 5.46e+00 5.70e+00 ph/cm2/s
Error 2.26e-01 1.63e-01 1.43e-01 2.54e-01 3.82e-01 4.51e-01 ph/cm2/s
Fluence Band 1.29e-07 3.07e-07 4.52e-07 5.45e-07 1.15e-06 1.45e-06 erg/cm2
Error 1.67e-08 1.84e-08 2.91e-08 1.94e-07 6.20e-08 0.00e+00 erg/cm2
Peak flux Band 1.22e+00 2.01e+00 1.71e+00 7.56e-01 5.46e+00 5.70e+00 ph/cm2/s
Error 2.26e-01 1.63e-01 1.43e-01 2.53e-01 3.82e-01 4.51e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.474 0.080 - - 2.49e-02 1.19e-03 62.680 57
CPL 0.692 0.369 92.5 23.0 5.74e-02 2.29e-02 47.001 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.327 0.099 - - 4.69e-02 3.00e-03 71.345 57
CPL 0.050 0.515 84.6 15.4 1.85e-01 1.07e-01 47.294 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: 2.880000 sec.
T50 in the 50-300 keV band: 1.920000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.000 -1.240 3.760
T90 4.000 -1.240 2.760
T50 2.000 -0.240 1.760
Peak 1.000 -0.240 0.760
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
192.8781 +13.0378 0.0051 43.6 16.9 1.7813 37.7 TRIG_00103647
------------------------------------------
Foreground time interval of the image:
-1.240 3.760 (delta_t = 5.000 [sec])
Background time interval of the image:
-243.435 -1.240 (delta_t = 242.195 [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 -1.240 sec. to 3.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47378 ( -8.002138E-02 7.998860E-02) )
Norm@50keV : 2.485149E-02 ( -1.186384E-03 1.186412E-03) )
------------------------------------------------------------
Chi-Squared = 62.67957 using 59 PHA bins.
Reduced chi-squared = 1.099642 for 57 degrees of freedom
Null hypothesis probability = 0.282
Photon flux (15-150 keV) in 5.000 sec: 3.08111 ( -0.15953 0.15997 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1845e-06 ( -5.946e-08 5.857e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.240 sec. to 3.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.691593 ( -0.384305 0.353913 )
Epeak [keV] : 92.4680 ( -14.3240 31.6451 )
Norm@50keV : 5.737784E-02 ( -1.768894E-02 2.817520E-02) )
------------------------------------------------------------
Chi-Squared = 47.00060 using 59 PHA bins.
Reduced chi-squared = 0.8392965 for 56 degrees of freedom
Null hypothesis probability = 0.799
Photon flux (15-150 keV) in 5.000 sec: 2.97938 ( -0.16493 0.16546 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1534e-06 ( -6.175e-08 6.2305e-08 ) ergs/cm2
Band function
Time interval is from -1.240 sec. to 3.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.691980 ( -0.353497 0.385537 )
beta : -9.22436 ( -0.775638 4.83642 )
Epeak [keV] : 92.4506 ( -14.3135 31.6375 )
Norm@50keV : 5.736257E-02 ( -1.767591E-02 2.821620E-02) )
------------------------------------------------------------
Chi-Squared = 47.00068 using 59 PHA bins.
Reduced chi-squared = 0.8545578 for 55 degrees of freedom
Null hypothesis probability = 0.770
Photon flux (15-150 keV) in 5.000 sec: 2.97936 ( -0.16494 0.16549 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15296e-06 ( -6.2075e-08 6.189e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.240 sec. to 0.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32707 ( -9.936905E-02 9.923971E-02) )
Norm@50keV : 4.694741E-02 ( -3.001373E-03 3.001604E-03) )
------------------------------------------------------------
Chi-Squared = 71.34512 using 59 PHA bins.
Reduced chi-squared = 1.251669 for 57 degrees of freedom
Null hypothesis probability = 9.574E-02
Photon flux (15-150 keV) in 1.000 sec: 5.62988 ( -0.3767 0.37737 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6092e-07 ( -3.12e-08 3.1292e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.240 sec. to 0.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.005275E-02 ( -0.545836 0.484170 )
Epeak [keV] : 84.5804 ( -11.0467 19.6789 )
Norm@50keV : 0.184963 ( -7.326229E-02 0.140366 )
------------------------------------------------------------
Chi-Squared = 47.29391 using 59 PHA bins.
Reduced chi-squared = 0.8445340 for 56 degrees of freedom
Null hypothesis probability = 0.790
Photon flux (15-150 keV) in 1.000 sec: 5.46341 ( -0.38151 0.38211 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.48286e-07 ( -3.2972e-08 3.2873e-08 ) ergs/cm2
Band function
Time interval is from -0.240 sec. to 0.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.974817E-02 ( -0.484396 0.366800 )
beta : -9.23883 ( -0.761168 7.38045 )
Epeak [keV] : 84.5455 ( -9.04301 19.6957 )
Norm@50keV : 0.185077 ( -7.336846E-02 0.140421 )
------------------------------------------------------------
Chi-Squared = 47.29397 using 59 PHA bins.
Reduced chi-squared = 0.8598904 for 55 degrees of freedom
Null hypothesis probability = 0.760
Photon flux (15-150 keV) in 1.000 sec: 5.46274 ( -0.3808 0.38285 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.48095e-07 ( -3.2981e-08 3.2788e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 20:05:37 EST 2008