batgrbproduct Analysis for Trigger=212179
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): Tue Jan 1 14:17:56 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger212179/GCN5_download_cron
======================================================================
Trigger: 00212179 Segment: 000
BAT Trigger Time: 170470288 [s; MET]
Trigger Stop: 170471248 [s; MET]
UTC: 2006-05-28T00:51:26.780200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 241.1287761531 Dec: -17.9144693274576 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 26.68
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 26.68
Flight Position: [ source = BAT ]
RA: 241.1287761531 Dec: -17.9144693274576 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 241.25892713968 Dec: -17.7693904376062 [deg; J2000]
{ 16h 05m 02.1s , -17d 46' 09.8" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 9.98677178561171 [arcmin] (formal 1-sigma fit error)
SNR: -1.06687975529456
RA = 16h 5m 2.1s (241.258927 deg.)
Dec = -17d 46' 10" (-17.769390 deg.)
Angular difference between Flight and Ground position is 11.446792 arcmin
Partial Coding Fraction: 0.7265625 [ including projection effects ]
Duration
T90: 960 +/-
Measured from: 0
to: 960 [s; relative to TRIGTIME]
T50: 960 +/-
Measured from: 0
to: 960 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 960 second)
Measured from: 0
to: 960 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 960 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.470753 -0.074352 -0.113187 -0.192990
0.177364 0.158685 0.149638 0.157335 [error]
Peak -0.470753 -0.074352 -0.113187 -0.192990
0.177364 0.158685 0.149638 0.157335 [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 1.07e-08 1.30e-08 2.61e-08 1.30e-06 7.36e-08 1.31e-06 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 4.74e-04 3.04e-04 2.92e-04 3.43e-03 9.18e-04 3.56e-03 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 1.24e-08 2.61e-08 4.62e-08 1.38e-06 8.65e-08 1.39e-06 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 5.32e-04 5.92e-04 5.35e-04 4.11e-03 1.19e-03 4.62e-03 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 1.11e-08 2.60e-08 2.56e-08 1.64e-06 8.66e-08 3.44e-07 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 4.89e-04 5.66e-04 5.15e-04 1.16e-02 1.20e-03 8.05e-03 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 7.86e-06 81.567 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 81.567 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 7.86e-06 81.567 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 81.567 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 960.000 0.000 960.000
T90 960.000 0.000 960.000
T50 960.000 0.000 960.000
Peak 960.000 0.000 960.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.2589 -17.7694 0.1809 19.9 116.1 -0.7050 -1.1 TRIG_00212179
------------------------------------------
Foreground time interval of the image:
200.000 300.630 (delta_t = 100.630 [sec])
301.000 877.050 (delta_t = 576.050 [sec])
878.000 960.000 (delta_t = 82.000 [sec])
Background time interval of the image:
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
200.000000 300.630000
301.000000 877.050000
878.000000 960.000000
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 1.571483E-05) )
------------------------------------------------------------
Chi-Squared = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.431005 for 57 degrees of freedom
Null hypothesis probability = 1.808E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00183586 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.4711e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
200.000000 300.630000
301.000000 877.050000
878.000000 960.000000
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 = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.456558 for 56 degrees of freedom
Null hypothesis probability = 1.448E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00238533 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.73007e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
200.000000 300.630000
301.000000 877.050000
878.000000 960.000000
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 1951.72 )
------------------------------------------------------------
Chi-Squared = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.483041 for 55 degrees of freedom
Null hypothesis probability = 1.151E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00240761 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.73279e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 878.000 sec. to 960.000 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 1.571483E-05) )
------------------------------------------------------------
Chi-Squared = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.431005 for 57 degrees of freedom
Null hypothesis probability = 1.808E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00183586 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.4711e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 878.000 sec. to 960.000 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 = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.456558 for 56 degrees of freedom
Null hypothesis probability = 1.448E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00238533 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.73007e-07 ) ergs/cm2
Band function
Time interval is from 878.000 sec. to 960.000 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 1951.72 )
------------------------------------------------------------
Chi-Squared = 81.56726 using 59 PHA bins.
Reduced chi-squared = 1.483041 for 55 degrees of freedom
Null hypothesis probability = 1.151E-02
Photon flux (15-150 keV) in 758.7 sec: 0.00000 ( 0 0.00240761 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.73279e-07 ) ergs/cm2
Plot creation:
Tue Jan 1 14:30:38 EST 2008