batgrbproduct Analysis for Trigger=353479
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 v2.44
Process Start Time (local time): Thu May 28 23:56:31 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger353479/GCN5_download_cron
======================================================================
Trigger: 00353479 Segment: 000
BAT Trigger Time: 265215481.424 [s; MET]
Trigger Stop: 265215481.456 [s; MET]
UTC: 2009-05-28T14:57:56.644480 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 350.514477977192 Dec: -69.9464574146986 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.87
Image Trigger?: NO
Rate S/N Ratio: 6.32455532033676 [ if not an image trigger ]
Image S/N Ratio: 5.87
Flight Position: [ source = BAT ]
RA: 350.514477977192 Dec: -69.9464574146986 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 350.270790202984 Dec: -69.9714052001854 [deg; J2000]
{ 23h 21m 05.0s , -69d 58' 17.1" }
+/- 5.93937964224586 [arcmin] (estimated 90% radius based on SNR)
+/- 4.73062855959271 [arcmin] (formal 1-sigma fit error)
SNR: 2.38656886931179
Angular difference between Flight and Ground position is 5.229419 arcmin
Partial Coding Fraction: 0.5078125 [ 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 0.009041 0.000343 0.000286 -0.001274
0.001736 0.001398 0.000878 0.000965 [error]
Peak 0.009041 0.000343 0.000286 -0.001274
0.001736 0.001398 0.000878 0.000965 [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 1.28e-09 2.80e-10 3.09e-11 3.77e-12 1.59e-09 1.60e-09 erg/cm2
Error 6.66e-10 2.19e-10 3.12e-11 5.91e-12 8.03e-10 8.03e-10 erg/cm2
Peak flux Power-law 1.39e+00 1.76e-01 9.75e-03 5.68e-04 1.58e+00 1.58e+00 ph/cm2/s
Error 7.29e-01 1.37e-01 9.69e-03 8.53e-04 8.07e-01 8.07e-01 ph/cm2/s
Fluence Cutoff-PL 1.28e-09 2.80e-10 3.09e-11 3.75e-12 1.59e-09 1.60e-09 erg/cm2
Error 6.66e-10 2.19e-10 3.12e-11 5.88e-12 8.03e-10 8.03e-10 erg/cm2
Peak flux Cutoff-PL 1.39e+00 1.76e-01 9.74e-03 5.64e-04 1.58e+00 1.58e+00 ph/cm2/s
Error 7.28e-01 1.37e-01 9.68e-03 8.49e-04 8.06e-01 8.06e-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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.177 0.943 - - 8.63e-04 7.82e-04 50.580 57
CPL 1.000 0.000 50.0 0.0 8.71e-04 0.00e+00 60.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.177 0.943 - - 8.63e-04 7.82e-04 50.580 57
CPL 1.000 0.000 50.0 0.0 8.71e-04 0.00e+00 60.130 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
350.2708 -69.9714 0.0810 41.4 -2.8 0.0061 2.4 TRIG_00353479
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.424 -1.424 (delta_t = 59.000 [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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.17741 ( -0.729333 1.15576 )
Norm@50keV : 8.62662E-04 ( -0.000862532 0.000702375 )
------------------------------------------------------------
# Chi-Squared = 50.58 using 59 PHA bins.
# Reduced chi-squared = 0.8873 for 57 degrees of freedom
# Null hypothesis probability = 7.131487e-01
Photon flux (15-150 keV) in 0.032 sec: 1.57787 ( -0.8082 0.805329 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59423e-09 ( -8.03005e-10 8.02285e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.70677E-04 ( )
------------------------------------------------------------
# Chi-Squared = 60.13 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 56 degrees of freedom
# Null hypothesis probability = 3.285095e-01
Photon flux (15-150 keV) in 0.032 sec: 1.57702 ( -0.807537 0.80516 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59437e-09 ( -8.02899e-10 8.02291e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91098 ( -33.438 -23.439 )
beta : -9.65614 ( 14.221 24.2171 )
Epeak [keV] : 18.1145 ( -3.52274 2.65079 )
Norm@50keV : 4.30592E+04 ( -16550.8 186992 )
------------------------------------------------------------
# Chi-Squared = 42.95 using 59 PHA bins.
# Reduced chi-squared = 0.7809 for 55 degrees of freedom
# Null hypothesis probability = 8.811474e-01
Photon flux (15-150 keV) in 0.032 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 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.17741 ( -0.729333 1.15576 )
Norm@50keV : 8.62662E-04 ( -0.000862532 0.000702375 )
------------------------------------------------------------
# Chi-Squared = 50.58 using 59 PHA bins.
# Reduced chi-squared = 0.8873 for 57 degrees of freedom
# Null hypothesis probability = 7.131487e-01
Photon flux (15-150 keV) in 0.032 sec: 1.57787 ( -0.8082 0.805329 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59423e-09 ( -8.03005e-10 8.02285e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.70677E-04 ( )
------------------------------------------------------------
# Chi-Squared = 60.13 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 56 degrees of freedom
# Null hypothesis probability = 3.285095e-01
Photon flux (15-150 keV) in 0.032 sec: 1.57702 ( -0.807537 0.80516 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59437e-09 ( -8.02899e-10 8.02291e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( -1.86836 1.86926 )
beta : -7.66091 ( 5.82338 15.6059 )
Epeak [keV] : 18.1403 ( -8.00393 2.34562 )
Norm@50keV : 1.41252E+04 ( -14173.6 479608 )
------------------------------------------------------------
# Chi-Squared = 43.04 using 59 PHA bins.
# Reduced chi-squared = 0.7826 for 55 degrees of freedom
# Null hypothesis probability = 8.790810e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri May 29 00:03:56 EDT 2009