batgrbproduct Analysis for Trigger=292965
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 17:43:12 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger292965/GCN5_download_cron
======================================================================
Trigger: 00292965 Segment: 000
BAT Trigger Time: 213113088 [s; MET]
Trigger Stop: 213113152 [s; MET]
UTC: 2007-10-03T14:04:45.733820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 287.679360710239 Dec: 7.56596763752263 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.26
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.26
Flight Position: [ source = BAT ]
RA: 287.679360710239 Dec: 7.56596763752263 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 287.719067304792 Dec: 7.5809630725759 [deg; J2000]
{ 19h 10m 52.6s , +07d 34' 51.5" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.63559124118282 [arcmin] (formal 1-sigma fit error)
SNR: -5.44901810758463
RA = 19h 10m 52.6s (287.719067 deg.)
Dec = 7d 34' 51" (7.580963 deg.)
Angular difference between Flight and Ground position is 2.527197 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 0.0240000188350677 +/- 0.004
Measured from: 251.111999988556
to: 251.136000007391 [s; relative to TRIGTIME]
T50: 0.0119999945163727 +/- 0.004
Measured from: 251.120000004768
to: 251.131999999285 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 250.629999995232
to: 251.629999995232 [s; relative to TRIGTIME]
Total Fluence
Measured from: 251.111999988556
to: 251.143999993801 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.002418 -0.002217 -0.001552 -0.001903
0.000949 0.000932 0.000620 0.000677 [error]
Peak -0.002148 -0.002024 -0.001410 -0.001587
0.000990 0.001006 0.000682 0.000711 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 5.41e-11 4.94e-11 6.52e-11 3.45e-09 2.16e-10 3.47e-09 erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 4.76e-02 3.09e-02 3.17e-02 4.42e-01 9.32e-02 4.59e-01 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 5.41e-11 6.74e-11 1.07e-10 3.67e-09 2.16e-10 3.68e-09 erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 5.71e-02 5.30e-02 4.43e-02 4.88e-01 9.88e-02 5.04e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 5.20e-02 5.40e-02 4.48e-02 5.26e-01 9.84e-02 2.17e-01 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 4.70e-04 59.958 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 59.958 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 8.14e-04 57.304 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 57.304 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 0.032 251.112 251.144
T90 0.024 251.112 251.136
T50 0.012 251.120 251.132
Peak 1.000 250.630 251.630
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.7191 +7.5810 0.0356 14.3 -92.1 -0.0087 -5.4 TRIG_00292965
------------------------------------------
Foreground time interval of the image:
251.112 251.144 (delta_t = 0.032 [sec])
Background time interval of the image:
-239.000 251.112 (delta_t = 490.112 [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 251.112 sec. to 251.144 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 9.405325E-04) )
------------------------------------------------------------
Chi-Squared = 59.95815 using 59 PHA bins.
Reduced chi-squared = 1.051897 for 57 degrees of freedom
Null hypothesis probability = 0.369
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.00000 ( 0 0.129421 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 4.32006e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 251.112 sec. to 251.144 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 1.000000E+24) )
------------------------------------------------------------
Chi-Squared = 59.95815 using 59 PHA bins.
Reduced chi-squared = 1.070681 for 56 degrees of freedom
Null hypothesis probability = 0.334
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.00000 ( 0 0.152774 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 4.32429e-10 ) ergs/cm2
Band function
Time interval is from 251.112 sec. to 251.144 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 ( 0.00000 2.006496E+07) )
------------------------------------------------------------
Chi-Squared = 59.95815 using 59 PHA bins.
Reduced chi-squared = 1.090148 for 55 degrees of freedom
Null hypothesis probability = 0.301
Photon flux (15-150 keV) in 3.2000E-02 sec: ( ) 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 251.112 sec. to 251.148 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 1.627321E-03) )
------------------------------------------------------------
Chi-Squared = 57.30367 using 59 PHA bins.
Reduced chi-squared = 1.005328 for 57 degrees of freedom
Null hypothesis probability = 0.464
Photon flux (15-150 keV) in 3.6000E-02 sec: 0.00000 ( 0 0.186473 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 9.16934e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 251.112 sec. to 251.148 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 1.000000E+24) )
------------------------------------------------------------
Chi-Squared = 57.30367 using 59 PHA bins.
Reduced chi-squared = 1.023280 for 56 degrees of freedom
Null hypothesis probability = 0.427
Photon flux (15-150 keV) in 3.6000E-02 sec: 0.00000 ( 0 0.197562 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 9.78638e-10 ) ergs/cm2
Band function
Time interval is from 251.112 sec. to 251.148 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 ( 0.00000 0.498144 )
------------------------------------------------------------
Chi-Squared = 57.30367 using 59 PHA bins.
Reduced chi-squared = 1.041885 for 55 degrees of freedom
Null hypothesis probability = 0.390
Photon flux (15-150 keV) in 3.6000E-02 sec: 0.00000 ( 0 0.196705 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.01047e-09 ) ergs/cm2
Plot creation:
Fri Dec 14 18:06:09 EST 2007