batgrbproduct Analysis for Trigger=360807
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): Tue Aug 25 03:46:17 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360807/GCN5_download_cron
======================================================================
Trigger: 00360807 Segment: 000
BAT Trigger Time: 272842194.496 [s; MET]
Trigger Stop: 272842195.52 [s; MET]
UTC: 2009-08-24T21:29:49.469700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 218.322860102238 Dec: -31.5190225844703 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.35
Image Trigger?: NO
Rate S/N Ratio: 8.30662386291807 [ if not an image trigger ]
Image S/N Ratio: 6.35
Flight Position: [ source = BAT ]
RA: 218.322860102238 Dec: -31.5190225844703 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 218.395331272105 Dec: -31.5330929271927 [deg; J2000]
{ 14h 33m 34.9s , -31d 31' 59.1" }
+/- 6.82717904577572 [arcmin] (estimated 90% radius based on SNR)
+/- 3.8361212003455 [arcmin] (formal 1-sigma fit error)
SNR: 1.95589305634036
Angular difference between Flight and Ground position is 3.801404 arcmin
Partial Coding Fraction: 0.9921875 [ 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: 1.02400001883507 [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 -0.011022 -0.001225 0.013985 0.019784
0.006353 0.005687 0.005009 0.004716 [error]
Peak -0.011022 -0.001225 0.013985 0.019784
0.006353 0.005687 0.005009 0.004716 [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 1.76e-10 1.24e-09 7.71e-09 2.41e-07 2.67e-08 2.48e-07 erg/cm2
Error 4.28e-10 1.65e-09 6.20e-09 3.16e-07 1.72e-08 3.19e-07 erg/cm2
Peak flux Power-law 5.28e-03 1.97e-02 6.12e-02 6.11e-01 1.71e-01 6.95e-01 ph/cm2/s
Error 1.32e-02 2.71e-02 5.01e-02 7.36e-01 1.35e-01 6.24e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-10 1.18e-09 8.84e-09 9.47e-08 2.75e-08 1.40e-07 erg/cm2
Error 4.12e-10 1.69e-09 6.47e-09 3.45e-07 1.30e-08 3.48e-07 erg/cm2
Peak flux Cutoff-PL 3.29e-03 1.85e-02 7.00e-02 2.90e-01 1.76e-01 3.80e-01 ph/cm2/s
Error 1.26e-02 2.73e-02 6.26e-02 8.99e-01 1.35e-01 5.73e-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 -0.637 1.375 - - 9.50e-04 1.02e-03 44.040 57
CPL -0.896 1.863 9994.1 0.0 7.99e-04 3.66e-03 44.100 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.637 1.375 - - 9.50e-04 1.02e-03 44.040 57
CPL -0.896 1.863 9994.1 0.0 7.99e-04 3.65e-03 44.100 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
218.3953 -31.5331 0.0984 13.4 -136.9 0.0221 2.0 TRIG_00360807
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-57.595 -10.496 (delta_t = 47.099 [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: -0.637017 ( -1.69561 1.0545 )
Norm@50keV : 9.50350E-04 ( -0.000950334 0.00108114 )
------------------------------------------------------------
# Chi-Squared = 44.04 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 57 degrees of freedom
# Null hypothesis probability = 8.956466e-01
Photon flux (15-150 keV) in 1.024 sec: 0.171258 ( -0.171257 0.0991725 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67149e-08 ( -2.16277e-08 1.27578e-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: -0.896012 ( -1.69253 2.03328 )
Epeak [keV] : 9994.11 ( -290.007 -290.007 )
Norm@50keV : 7.99017E-04 ( -0.00188601 0.00544299 )
------------------------------------------------------------
# Chi-Squared = 44.10 using 59 PHA bins.
# Reduced chi-squared = 0.7875 for 56 degrees of freedom
# Null hypothesis probability = 8.752913e-01
Photon flux (15-150 keV) in 1.024 sec: 0.176488 ( -0.176488 0.094456 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75206e-08 ( -1.29521e-08 1.29713e-08 ) 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 : 4.34011 ( 0.359908 0.359908 )
beta : -0.101413 ( -0.382425 1.86125 )
Epeak [keV] : 97.8931 ( -97.8651 287.058 )
Norm@50keV : 3.71891E-02 ( -0.0361485 0.0819598 )
------------------------------------------------------------
# Chi-Squared = 43.04 using 59 PHA bins.
# Reduced chi-squared = 0.7825 for 55 degrees of freedom
# Null hypothesis probability = 8.791245e-01
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: -0.637017 ( -1.69561 1.0545 )
Norm@50keV : 9.50350E-04 ( -0.000950334 0.00108114 )
------------------------------------------------------------
# Chi-Squared = 44.04 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 57 degrees of freedom
# Null hypothesis probability = 8.956466e-01
Photon flux (15-150 keV) in 1.024 sec: 0.171258 ( -0.171257 0.0991725 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67149e-08 ( -2.16277e-08 1.27578e-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: -0.896012 ( -1.69253 2.03328 )
Epeak [keV] : 9994.11 ( -290.007 -290.007 )
Norm@50keV : 7.99017E-04 ( -0.00188601 0.0054135 )
------------------------------------------------------------
# Chi-Squared = 44.10 using 59 PHA bins.
# Reduced chi-squared = 0.7875 for 56 degrees of freedom
# Null hypothesis probability = 8.752913e-01
Photon flux (15-150 keV) in 1.024 sec: 0.176488 ( -0.176488 0.094456 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75206e-08 ( -1.29521e-08 1.29713e-08 ) 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 : 4.34011 ( 0.359908 0.359908 )
beta : -0.101413 ( -0.382425 1.86125 )
Epeak [keV] : 97.8931 ( -97.8651 287.058 )
Norm@50keV : 3.71891E-02 ( -0.0361485 0.0819598 )
------------------------------------------------------------
# Chi-Squared = 43.04 using 59 PHA bins.
# Reduced chi-squared = 0.7825 for 55 degrees of freedom
# Null hypothesis probability = 8.791245e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Aug 25 03:56:50 EDT 2009