batgrbproduct Analysis for Trigger=360585
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 v2.45
Process Start Time (local time): Sat Aug 22 03:54:28 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360585/GCN5_download_cron
======================================================================
Trigger: 00360585 Segment: 000
BAT Trigger Time: 272542183.616 [s; MET]
Trigger Stop: 272542184.128 [s; MET]
UTC: 2009-08-21T10:09:38.599540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 43.9951926803954 Dec: 40.5076691549745 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.83
Image Trigger?: NO
Rate S/N Ratio: 7.41619848709566 [ if not an image trigger ]
Image S/N Ratio: 5.83
Flight Position: [ source = BAT ]
RA: 43.9951926803954 Dec: 40.5076691549745 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 43.9883767091495 Dec: 40.5149184252585 [deg; J2000]
{ 02h 55m 57.2s , +40d 30' 53.7" }
+/- 4.72262957994143 [arcmin] (estimated 90% radius based on SNR)
+/- 2.89939489777293 [arcmin] (formal 1-sigma fit error)
SNR: 3.31130013766107
Angular difference between Flight and Ground position is 0.534658 arcmin
Partial Coding Fraction: 0.1914062 [ including projection effects ]
Duration
T90: 0.512000024318695 +/-
Measured from: 0
to: 0.512000024318695 [s; relative to TRIGTIME]
T50: 0.512000024318695 +/-
Measured from: 0
to: 0.512000024318695 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.512000024318695 second)
Measured from: -2.98023223876953e-08
to: 0.511999994516373 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.512000024318695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.047279 0.004261 0.004456 -0.001926
0.009936 0.010457 0.010226 0.009266 [error]
Peak 0.047279 0.004261 0.004456 -0.001926
0.009936 0.010457 0.010226 0.009266 [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 1.41e-08 8.19e-09 3.06e-09 1.54e-09 2.62e-08 2.61e-08 erg/cm2
Error 6.55e-09 5.64e-09 4.43e-09 5.37e-09 1.47e-08 1.70e-08 erg/cm2
Peak flux Power-law 9.25e-01 3.05e-01 5.70e-02 1.26e-02 1.29e+00 1.29e+00 ph/cm2/s
Error 4.37e-01 2.01e-01 8.29e-02 3.94e-02 5.96e-01 6.01e-01 ph/cm2/s
Fluence Cutoff-PL 1.67e-08 6.86e-09 8.78e-11 1.96e-15 2.37e-08 2.36e-08 erg/cm2
Error 7.15e-09 7.34e-09 1.76e-09 3.98e-10 1.05e-08 1.03e-08 erg/cm2
Peak flux Cutoff-PL 1.07e+00 2.80e-01 2.02e-03 2.48e-08 1.36e+00 1.35e+00 ph/cm2/s
Error 4.69e-01 2.20e-01 3.34e-02 3.72e-03 5.56e-01 5.57e-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 3.414 1.251 - - 3.42e-03 3.91e-03 62.890 57
CPL 1.000 0.000 50.0 0.0 1.97e-02 0.00e+00 69.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.414 1.251 - - 3.42e-03 3.91e-03 62.890 57
CPL 1.000 0.000 50.0 0.0 1.97e-02 0.00e+00 69.570 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 0.512 0.000 0.512
T90 0.512 0.000 0.512
T50 0.512 0.000 0.512
Peak 0.512 -0.000 0.512
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
43.9884 +40.5149 0.0585 53.2 -13.3 0.0686 3.3 TRIG_00360585
------------------------------------------
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-60.616 -7.616 (delta_t = 53.000 [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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.41450 ( -1.02019 1.48137 )
Norm@50keV : 3.41933E-03 ( -0.00341624 0.0044044 )
------------------------------------------------------------
# Chi-Squared = 62.89 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.758127e-01
Photon flux (15-150 keV) in 0.512 sec: 1.29309 ( -0.592804 0.599264 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61927e-08 ( -1.33038e-08 1.61458e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.97305E-02 ( )
------------------------------------------------------------
# Chi-Squared = 69.57 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 56 degrees of freedom
# Null hypothesis probability = 1.050460e-01
Photon flux (15-150 keV) in 0.512 sec: 1.35594 ( -0.555381 0.55718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37098e-08 ( -1.00833e-08 1.08406e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38546 ( 1.79497 1.79497 )
beta : -9.99999 ( 541750 541760 )
Epeak [keV] : 17.7676 ( -11.969 8.08693 )
Norm@50keV : 8024.14 ( -8020.48 5641.84 )
------------------------------------------------------------
# Chi-Squared = 59.48 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 55 degrees of freedom
# Null hypothesis probability = 3.158977e-01
Photon flux (15-150 keV) in 0.512 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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.41450 ( -1.02019 1.48137 )
Norm@50keV : 3.41933E-03 ( -0.00341624 0.0044044 )
------------------------------------------------------------
# Chi-Squared = 62.89 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.758127e-01
Photon flux (15-150 keV) in 0.512 sec: 1.29309 ( -0.592804 0.599264 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61927e-08 ( -1.33038e-08 1.61458e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.97305E-02 ( )
------------------------------------------------------------
# Chi-Squared = 69.57 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 56 degrees of freedom
# Null hypothesis probability = 1.050460e-01
Photon flux (15-150 keV) in 0.512 sec: 1.35594 ( -0.555381 0.55718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37098e-08 ( -1.00833e-08 1.08405e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38546 ( 1.79497 1.79497 )
beta : -9.99999 ( 541750 541760 )
Epeak [keV] : 17.7676 ( -11.9652 8.08692 )
Norm@50keV : 8024.14 ( -8020.48 5641.84 )
------------------------------------------------------------
# Chi-Squared = 59.48 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 55 degrees of freedom
# Null hypothesis probability = 3.158977e-01
Photon flux (15-150 keV) in 0.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat Aug 22 04:10:01 EDT 2009