batgrbproduct Analysis for Trigger=100703
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 18:53:32 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger100703/SDC
======================================================================
Trigger: 00100703 Segment: 000
BAT Trigger Time: 125612457.024 [s; MET]
Trigger Stop: 125612458.048 [s; MET]
UTC: 2004-12-24T20:20:57.698840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 56.1991351820266 Dec: -6.61701115766916 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 19.824227601599 [ if not an image trigger ]
Image S/N Ratio: 10
Flight Position: [ source = BAT ]
RA: 56.1991351820266 Dec: -6.61701115766916 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 56.2036030880727 Dec: -6.66301119436289 [deg; J2000]
{ 03h 44m 48.9s , -06d 39' 46.8" }
+/- 2.73435452072461 [arcmin] (estimated 90% radius based on SNR)
+/- 1.16188541381063 [arcmin] (formal 1-sigma fit error)
SNR: 7.22836480790152
RA = 3h 44m 48.9s (56.203603 deg.)
Dec = -6d 39' 47" (-6.663011 deg.)
Angular difference between Flight and Ground position is 2.772817 arcmin
Partial Coding Fraction: 0.2578125 [ including projection effects ]
Duration
T90: 177.232000008225 +/- 18.9121489964638
Measured from: -93.1720000058413
to: 84.0600000023842 [s; relative to TRIGTIME]
T50: 37.5320000052452 +/- 4.19237402729542
Measured from: -11.3840000033379
to: 26.1480000019073 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0600000023841858
to: 0.939999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -109.62800000608
to: 116.271999999881 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.768206 5.647019 3.698819 0.757867
0.137193 0.143595 0.123214 0.099243 [error]
Peak 0.068500 0.131032 0.120358 0.034194
0.010289 0.011977 0.011290 0.008051 [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-06 2.48e-06 3.01e-06 7.16e-06 9.09e-06 1.42e-05 erg/cm2
Error 9.68e-08 9.18e-08 1.27e-07 6.62e-07 3.11e-07 7.43e-07 erg/cm2
Peak flux Power-law 8.00e-01 9.39e-01 7.94e-01 1.14e+00 2.94e+00 3.67e+00 ph/cm2/s
Error 1.51e-01 1.11e-01 8.64e-02 2.54e-01 3.05e-01 3.68e-01 ph/cm2/s
Fluence Cutoff-PL 1.34e-06 2.61e-06 3.16e-06 3.24e-06 8.73e-06 1.04e-05 erg/cm2
Error 1.22e-07 1.07e-07 1.46e-07 9.58e-07 3.48e-07 1.00e-06 erg/cm2
Peak flux Cutoff-PL 7.28e-01 9.70e-01 8.42e-01 7.88e-01 2.91e+00 3.32e+00 ph/cm2/s
Error 1.84e-01 1.24e-01 8.59e-02 4.38e-01 3.07e-01 5.37e-01 ph/cm2/s
Fluence Band 1.30e-06 2.63e-06 3.09e-06 4.76e-06 8.71e-06 1.18e-05 erg/cm2
Error 1.34e-07 1.23e-07 1.80e-07 1.67e-06 3.42e-07 1.77e-06 erg/cm2
Peak flux Band 7.27e-01 9.71e-01 8.41e-01 8.65e-01 2.91e+00 3.41e+00 ph/cm2/s
Error 1.91e-01 1.50e-01 1.21e-01 3.39e-01 3.07e-01 5.44e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.722 0.061 - - 4.38e-03 1.47e-04 56.080 57
CPL 1.052 0.281 74.1 12.6 9.18e-03 2.85e-03 36.692 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.242 0.162 - - 2.49e-02 2.45e-03 66.460 57
CPL 0.836 0.619 163.3 5000.0 3.83e-02 2.81e-02 65.240 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: 132.032000 sec.
T50 in the 50-300 keV band: 39.680000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 225.900 -109.628 116.272
T90 177.232 -93.172 84.060
T50 37.532 -11.384 26.148
Peak 1.000 -0.060 0.940
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
56.2036 -6.6630 0.0269 40.2 35.6 10.8097 7.2 TRIG_00100703
------------------------------------------
Foreground time interval of the image:
-109.628 80.622 (delta_t = 190.250 [sec])
81.976 116.272 (delta_t = 34.296 [sec])
Background time interval of the image:
-115.819 -109.628 (delta_t = 6.191 [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
Multiple GTIs in the spectrum
tstart tstop
-109.628000 80.622000
81.976000 116.272000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72219 ( -6.058967E-02 6.072164E-02) )
Norm@50keV : 4.381928E-03 ( -1.467122E-04 1.466339E-04) )
------------------------------------------------------------
Chi-Squared = 56.07959 using 59 PHA bins.
Reduced chi-squared = 0.9838524 for 57 degrees of freedom
Null hypothesis probability = 0.510
Photon flux (15-150 keV) in 224.5 sec: 0.586555 ( -0.021994 0.022087 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.09315e-06 ( -3.11e-07 3.11741e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-109.628000 80.622000
81.976000 116.272000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05214 ( -0.290406 0.271571 )
Epeak [keV] : 74.1018 ( -8.63231 16.4796 )
Norm@50keV : 9.175772E-03 ( -2.329303E-03 3.375941E-03) )
------------------------------------------------------------
Chi-Squared = 36.69213 using 59 PHA bins.
Reduced chi-squared = 0.6552167 for 56 degrees of freedom
Null hypothesis probability = 0.979
Photon flux (15-150 keV) in 224.5 sec: 0.560774 ( -0.02395 0.024026 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.73049e-06 ( -3.48851e-07 3.46448e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-109.628000 80.622000
81.976000 116.272000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.889323 ( -0.381433 0.894404 )
beta : -2.19558 ( -7.80442 0.303324 )
Epeak [keV] : 65.8439 ( -20.4914 20.1151 )
Norm@50keV : 1.135053E-02 ( -4.093265E-03 2.990483E-02) )
------------------------------------------------------------
Chi-Squared = 35.70105 using 59 PHA bins.
Reduced chi-squared = 0.6491101 for 55 degrees of freedom
Null hypothesis probability = 0.980
Photon flux (15-150 keV) in 224.5 sec: 0.556806 ( -0.024157 0.025302 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.70901e-06 ( -3.41846e-07 3.43058e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.060 sec. to 0.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24229 ( -0.163103 0.160929 )
Norm@50keV : 2.488151E-02 ( -2.454003E-03 2.451060E-03) )
------------------------------------------------------------
Chi-Squared = 66.45986 using 59 PHA bins.
Reduced chi-squared = 1.165962 for 57 degrees of freedom
Null hypothesis probability = 0.183
Photon flux (15-150 keV) in 1.000 sec: 2.93918 ( -0.30442 0.30498 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49457e-07 ( -2.597e-08 2.6133e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.060 sec. to 0.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.836270 ( -0.715427 0.522521 )
Epeak [keV] : 163.326 ( -163.316 9836.67 )
Norm@50keV : 3.828978E-02 ( -1.509898E-02 4.107018E-02) )
------------------------------------------------------------
Chi-Squared = 65.23996 using 59 PHA bins.
Reduced chi-squared = 1.164999 for 56 degrees of freedom
Null hypothesis probability = 0.186
Photon flux (15-150 keV) in 1.000 sec: 2.91448 ( -0.30636 0.30757 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48065e-07 ( -2.6717e-08 2.6496e-08 ) ergs/cm2
Band function
Time interval is from -0.060 sec. to 0.940 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.541477 ( -9.45852 4.67998 )
beta : -1.40147 ( -6.57949 2.29853 )
Epeak [keV] : 91.9020 ( -163.237 9836.66 )
Norm@50keV : 5.942358E-02 ( -1.516408E-02 4.111947E-02) )
------------------------------------------------------------
Chi-Squared = 65.27953 using 59 PHA bins.
Reduced chi-squared = 1.186901 for 55 degrees of freedom
Null hypothesis probability = 0.162
Photon flux (15-150 keV) in 1.000 sec: 2.91069 ( -0.3034 0.31105 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47905e-07 ( -2.6704e-08 2.6495e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 19:15:30 EST 2008