batgrbproduct Analysis for Trigger=360046
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): Sun Aug 16 08:30:30 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360046/GCN5_download_cron
======================================================================
Trigger: 00360046 Segment: 000
BAT Trigger Time: 272041619.008 [s; MET]
Trigger Stop: 272041620.032 [s; MET]
UTC: 2009-08-15T15:06:54.007940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 102.729887386125 Dec: -30.5898547631499 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.66
Image Trigger?: NO
Rate S/N Ratio: 17.3781471969828 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 102.729887386125 Dec: -30.5898547631499 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 102.65740137456 Dec: -30.6699128809815 [deg; J2000]
{ 06h 50m 37.8s , -30d 40' 11.7" }
+/- 4.95116574507366 [arcmin] (estimated 90% radius based on SNR)
+/- 3.98890259104151 [arcmin] (formal 1-sigma fit error)
SNR: 3.09513177829837
Angular difference between Flight and Ground position is 6.089226 arcmin
Partial Coding Fraction: 0.8515625 [ 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 -0.003571 -0.002508 0.020174 0.025376
0.006383 0.007191 0.006737 0.007408 [error]
Peak -0.003571 -0.002508 0.020174 0.025376
0.006383 0.007191 0.006737 0.007408 [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 2.54e-10 1.73e-09 1.02e-08 2.86e-07 3.44e-08 3.12e-07 erg/cm2
Error 6.14e-10 2.25e-09 8.25e-09 4.03e-07 1.82e-08 4.08e-07 erg/cm2
Peak flux Power-law 7.92e-03 2.78e-02 8.11e-02 7.32e-01 2.24e-01 8.64e-01 ph/cm2/s
Error 1.89e-02 3.70e-02 6.67e-02 8.44e-01 1.80e-01 8.29e-01 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 3.71e-03 2.72e-02 1.06e-01 3.44e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 1.49e-02 3.07e-02 6.72e-02 8.57e-01 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 -0.545 1.405 - - 1.31e-03 1.36e-03 45.860 57
CPL -4.984 0.000 117.1 67.2 3.11e-02 3.57e-02 44.230 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.545 1.405 - - 1.31e-03 1.36e-03 45.860 57
CPL -4.984 0.000 117.1 67.2 3.11e-02 3.57e-02 44.230 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
102.6574 -30.6699 0.0619 21.0 147.8 0.0446 3.1 TRIG_00360046
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.008 -54.226 (delta_t = 5.781 [sec])
-53.008 -11.008 (delta_t = 42.000 [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: -0.544819 ( -1.7268 1.08324 )
Norm@50keV : 1.30697E-03 ( -0.00130731 0.00142032 )
------------------------------------------------------------
# Chi-Squared = 45.86 using 59 PHA bins.
# Reduced chi-squared = 0.8046 for 57 degrees of freedom
# Null hypothesis probability = 8.546016e-01
Photon flux (15-150 keV) in 1.024 sec: 0.224390 ( -0.22439 0.135889 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44047e-08 ( -1.82138e-08 1.8215e-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: -4.98367 ( )
Epeak [keV] : 117.092 ( -34.8092 99.6519 )
Norm@50keV : 3.10629E-02 ( -0.0310626 0.0402873 )
------------------------------------------------------------
# Chi-Squared = 44.23 using 59 PHA bins.
# Reduced chi-squared = 0.7899 for 56 degrees of freedom
# Null hypothesis probability = 8.721980e-01
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 : 5.00000 ( -1.21078e+06 -1.21078e+06 )
beta : -1.17757 ( 1.19093 2.73305 )
Epeak [keV] : 112.871 ( -112.775 96.0375 )
Norm@50keV : 3.59977E-02 ( -0.0362763 8239.22 )
------------------------------------------------------------
# Chi-Squared = 44.07 using 59 PHA bins.
# Reduced chi-squared = 0.8012 for 55 degrees of freedom
# Null hypothesis probability = 8.545266e-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: -0.544819 ( -1.7268 1.08324 )
Norm@50keV : 1.30697E-03 ( -0.00130731 0.00142032 )
------------------------------------------------------------
# Chi-Squared = 45.86 using 59 PHA bins.
# Reduced chi-squared = 0.8046 for 57 degrees of freedom
# Null hypothesis probability = 8.546016e-01
Photon flux (15-150 keV) in 1.024 sec: 0.224390 ( -0.22439 0.135889 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44047e-08 ( -1.82138e-08 1.8215e-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: -4.98367 ( )
Epeak [keV] : 117.092 ( -34.8092 99.6519 )
Norm@50keV : 3.10629E-02 ( -0.0310626 0.0402873 )
------------------------------------------------------------
# Chi-Squared = 44.23 using 59 PHA bins.
# Reduced chi-squared = 0.7899 for 56 degrees of freedom
# Null hypothesis probability = 8.721980e-01
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 : 5.00000 ( -1.21078e+06 -1.21078e+06 )
beta : -1.17757 ( 1.19093 2.73305 )
Epeak [keV] : 112.871 ( -112.775 96.0375 )
Norm@50keV : 3.59977E-02 ( -0.0362763 8239.22 )
------------------------------------------------------------
# Chi-Squared = 44.07 using 59 PHA bins.
# Reduced chi-squared = 0.8012 for 55 degrees of freedom
# Null hypothesis probability = 8.545266e-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:
Sun Aug 16 08:41:15 EDT 2009