batgrbproduct Analysis for Trigger=145729
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): Mon Jan 7 14:46:42 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger145729/SDC
======================================================================
Trigger: 00145729 Segment: 000
BAT Trigger Time: 142937421.444 [s; MET]
Trigger Stop: 142937421.476 [s; MET]
UTC: 2005-07-13T08:50:21.824520 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 47.028342861242 Dec: 58.2724416660759 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 33371
Image Trigger?: NO
Rate S/N Ratio: 9.05538513813742 [ if not an image trigger ]
Image S/N Ratio: 33371
Flight Position: [ source = BAT ]
RA: 47.028342861242 Dec: 58.2724416660759 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 46.9676378124904 Dec: 58.3255236669432 [deg; J2000]
{ 03h 07m 52.2s , +58d 19' 31.9" }
+/- 4.02762011819545 [arcmin] (estimated 90% radius based on SNR)
+/- 2.30002688549889 [arcmin] (formal 1-sigma fit error)
SNR: 4.156840663539
RA = 3h 7m 52.2s (46.967638 deg.)
Dec = 58d 19' 32" (58.325524 deg.)
Angular difference between Flight and Ground position is 3.715783 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000801 0.000321 0.004347 0.004003
0.001010 0.001270 0.001193 0.001300 [error]
Peak -0.000801 0.000321 0.004347 0.004003
0.001010 0.001270 0.001193 0.001300 [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 1.10e-10 2.42e-12 1.34e-14 7.44e-17 1.12e-10 0.00e+00 erg/cm2
Error 2.21e-10 2.37e-11 2.57e-12 6.91e-11 2.34e-10 0.00e+00 erg/cm2
Peak flux Power-law 1.26e-01 1.67e-03 4.62e-06 1.28e-08 1.29e-01 0.00e+00 ph/cm2/s
Error 2.50e-01 1.54e-02 7.50e-04 5.60e-03 2.59e-01 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 1.10e-10 2.42e-12 1.33e-14 7.35e-17 1.12e-10 0.00e+00 erg/cm2
Error 2.21e-10 2.39e-11 2.65e-12 2.08e-10 2.34e-10 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.27e-01 1.67e-03 4.60e-06 1.27e-08 1.29e-01 0.00e+00 ph/cm2/s
Error 2.50e-01 1.54e-02 7.50e-04 1.54e-02 2.59e-01 0.00e+00 ph/cm2/s
Fluence Band 0.00e+00 2.64e-12 1.69e-14 1.08e-16 1.18e-10 0.00e+00 erg/cm2
Error 1.60e+10 2.89e-12 3.03e-12 2.77e-08 1.54e-11 0.00e+00 erg/cm2
Peak flux Band 1.27e-01 1.78e-03 5.38e-06 1.63e-08 1.29e-01 0.00e+00 ph/cm2/s
Error 4.54e-01 1.23e-02 9.56e-05 8.64e-02 2.90e+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 1.500 6.500 - - 0.00e+00 6.96e-05 56.552 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 1.76e-01 56.552 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 6.96e-05 56.552 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 1.76e-01 56.552 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
46.9676 +58.3255 0.0461 33.2 -43.0 0.0097 4.2 TRIG_00145729
------------------------------------------
Foreground time interval of the image:
0.004 0.036 (delta_t = 0.032 [sec])
Background time interval of the image:
-178.235 -5.440 (delta_t = 172.795 [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 0.004 sec. to 0.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 1.391455E-04) )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 0.9921454 for 57 degrees of freedom
Null hypothesis probability = 0.492
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.129136 ( -0.129136 0.389016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12464e-10 ( -1.12464e-10 3.56371e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 0.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 0.351577 )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 1.009862 for 56 degrees of freedom
Null hypothesis probability = 0.454
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.128759 ( -0.128759 0.388436 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12193e-10 ( -1.12193e-10 3.56397e-10 ) ergs/cm2
Band function
Time interval is from 0.004 sec. to 0.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -1.644992E-02 0.273966 )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 1.028223 for 55 degrees of freedom
Null hypothesis probability = 0.417
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.128711 ( -0.128711 57.9334 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17762e-10 ( -1.17762e-10 5.52003e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.004 sec. to 0.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 1.391455E-04) )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 0.9921454 for 57 degrees of freedom
Null hypothesis probability = 0.492
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.129136 ( -0.129136 0.389016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12464e-10 ( -1.12464e-10 3.56371e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 0.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 0.351577 )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 1.009862 for 56 degrees of freedom
Null hypothesis probability = 0.454
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.128759 ( -0.128759 0.388436 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12193e-10 ( -1.12193e-10 3.56397e-10 ) ergs/cm2
Band function
Time interval is from 0.004 sec. to 0.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -1.644992E-02 0.273966 )
------------------------------------------------------------
Chi-Squared = 56.55229 using 59 PHA bins.
Reduced chi-squared = 1.028223 for 55 degrees of freedom
Null hypothesis probability = 0.417
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.128711 ( -0.128711 57.9334 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17762e-10 ( -1.17762e-10 5.52003e-08 ) ergs/cm2
Plot creation:
Mon Jan 7 15:01:44 EST 2008