batgrbproduct Analysis for Trigger=362585
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 Sep 12 13:17:12 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362585/GCN5_download_cron
======================================================================
Trigger: 00362585 Segment: 000
BAT Trigger Time: 274403411.008 [s; MET]
Trigger Stop: 274403412.032 [s; MET]
UTC: 2009-09-11T23:10:05.930640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 233.087205142688 Dec: 71.0750742894864 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.71
Image Trigger?: NO
Rate S/N Ratio: 26.3628526529281 [ if not an image trigger ]
Image S/N Ratio: 5.71
Flight Position: [ source = BAT ]
RA: 233.087205142688 Dec: 71.0750742894864 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 233.20184720636 Dec: 71.1042436063812 [deg; J2000]
{ 15h 32m 48.4s , +71d 06' 15.3" }
+/- 7.57943108064059 [arcmin] (estimated 90% radius based on SNR)
+/- 6.28923145009112 [arcmin] (formal 1-sigma fit error)
SNR: 1.68459168938215
Angular difference between Flight and Ground position is 2.834184 arcmin
Partial Coding Fraction: 0.2148438 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: -2.98023223876953e-08
to: 1.02399995923042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.018347 -0.005622 0.032395 0.051976
0.016897 0.018896 0.019173 0.022067 [error]
Peak 0.018347 -0.005622 0.032395 0.051976
0.016897 0.018896 0.019173 0.022067 [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 6.76e-10 3.79e-09 1.84e-08 3.81e-07 5.82e-08 4.03e-07 erg/cm2
Error 3.38e-09 7.30e-09 1.84e-08 6.95e-07 5.34e-08 7.03e-07 erg/cm2
Peak flux Power-law 2.05e-02 6.10e-02 1.48e-01 1.00e+00 4.01e-01 1.24e+00 ph/cm2/s
Error 1.06e-01 1.24e-01 1.51e-01 1.64e+00 4.28e-01 1.71e+00 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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.23e-03 4.07e-02 1.76e-01 6.91e-01 6.70e-01 0.00e+00 ph/cm2/s
Error 9.04e-02 1.15e-01 1.75e-01 0.00e+00 0.00e+00 0.00e+00 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 -0.282 0.916 - - 2.65e-03 3.70e-03 72.690 57
CPL -4.991 0.000 133.7 305.0 2.74e-02 5.76e-02 71.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.282 0.916 - - 2.65e-03 3.70e-03 72.690 57
CPL -4.991 0.000 133.7 305.0 2.74e-02 5.76e-02 71.990 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
233.2018 +71.1042 0.1139 52.7 -11.0 0.0691 1.7 TRIG_00362585
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.008 -52.303 (delta_t = 7.704 [sec])
-51.008 -11.008 (delta_t = 40.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.281885 ( 0.281779 2.11403 )
Norm@50keV : 2.65499E-03 ( -0.00265504 0.0047409 )
------------------------------------------------------------
# Chi-Squared = 72.69 using 59 PHA bins.
# Reduced chi-squared = 1.275 for 57 degrees of freedom
# Null hypothesis probability = 7.863459e-02
Photon flux (15-150 keV) in 1.024 sec: 0.401296 ( -0.401296 0.454079 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.82246e-08 ( -5.82246e-08 4.85233e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99119 ( )
Epeak [keV] : 133.723 ( -133.739 476.233 )
Norm@50keV : 2.73766E-02 ( -0.0273421 0.0877643 )
------------------------------------------------------------
# Chi-Squared = 71.99 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 56 degrees of freedom
# Null hypothesis probability = 7.364138e-02
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38546 ( 0.0895479 0.0895479 )
beta : -9.37167 ( -2.10806 -0.27595 )
Epeak [keV] : 144.465 ( -70.1832 -144.463 )
Norm@50keV : 1.79656E-02 ( -0.0179443 0.0716508 )
------------------------------------------------------------
# Chi-Squared = 72.04 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 55 degrees of freedom
# Null hypothesis probability = 6.125599e-02
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.281885 ( 0.281779 2.11403 )
Norm@50keV : 2.65499E-03 ( -0.00265504 0.0047409 )
------------------------------------------------------------
# Chi-Squared = 72.69 using 59 PHA bins.
# Reduced chi-squared = 1.275 for 57 degrees of freedom
# Null hypothesis probability = 7.863459e-02
Photon flux (15-150 keV) in 1.024 sec: 0.401296 ( -0.401296 0.454079 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.82246e-08 ( -5.82246e-08 4.85233e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99119 ( )
Epeak [keV] : 133.723 ( -133.739 476.233 )
Norm@50keV : 2.73766E-02 ( -0.0273421 0.0877643 )
------------------------------------------------------------
# Chi-Squared = 71.99 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 56 degrees of freedom
# Null hypothesis probability = 7.364138e-02
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38546 ( 0.0895479 0.0895479 )
beta : -9.37167 ( -2.10806 -0.27595 )
Epeak [keV] : 144.465 ( -70.1832 -144.463 )
Norm@50keV : 1.79656E-02 ( -0.0179443 0.0716508 )
------------------------------------------------------------
# Chi-Squared = 72.04 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 55 degrees of freedom
# Null hypothesis probability = 6.125599e-02
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat Sep 12 13:25:53 EDT 2009