batgrbproduct Analysis for Trigger=362330
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): Fri Sep 11 16:30:36 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362330/GCN5_download_cron
======================================================================
Trigger: 00362330 Segment: 000
BAT Trigger Time: 274332229.76 [s; MET]
Trigger Stop: 274332230.016 [s; MET]
UTC: 2009-09-11T03:23:44.684960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 152.812121148611 Dec: 45.5636650577821 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.01
Image Trigger?: NO
Rate S/N Ratio: 6.08276253029822 [ if not an image trigger ]
Image S/N Ratio: 6.01
Flight Position: [ source = BAT ]
RA: 152.812121148611 Dec: 45.5636650577821 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 152.795356552185 Dec: 45.5916785870697 [deg; J2000]
{ 10h 11m 10.9s , +45d 35' 30.0" }
+/- 3.82325650045986 [arcmin] (estimated 90% radius based on SNR)
+/- 2.46713214829106 [arcmin] (formal 1-sigma fit error)
SNR: 4.47786106784987
Angular difference between Flight and Ground position is 1.822312 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 0.255999982357025 +/-
Measured from: 0
to: 0.255999982357025 [s; relative to TRIGTIME]
T50: 0.255999982357025 +/-
Measured from: 0
to: 0.255999982357025 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.255999982357025 second)
Measured from: 2.98023223876953e-08
to: 0.256000012159348 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.255999982357025 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001185 0.014555 0.004242 0.001482
0.002653 0.002788 0.002478 0.002140 [error]
Peak 0.001185 0.014555 0.004242 0.001482
0.002653 0.002788 0.002478 0.002140 [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 2.06e-09 3.02e-09 3.30e-09 6.78e-09 1.05e-08 1.53e-08 erg/cm2
Error 9.38e-10 1.13e-09 1.69e-09 7.25e-09 4.37e-09 8.50e-09 erg/cm2
Peak flux Power-law 2.61e-01 2.11e-01 1.16e-01 9.27e-02 6.30e-01 6.82e-01 ph/cm2/s
Error 1.21e-01 7.92e-02 5.76e-02 7.89e-02 2.36e-01 2.58e-01 ph/cm2/s
Fluence Cutoff-PL 1.49e-09 5.20e-09 3.21e-09 1.00e-08 0.00e+00 0.00e+00 erg/cm2
Error 7.31e-10 1.67e-09 3.57e-09 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.84e-01 3.55e-01 1.22e-01 2.96e-03 6.62e-01 6.63e-01 ph/cm2/s
Error 9.19e-02 1.16e-01 8.05e-02 1.65e-02 2.09e-01 2.09e-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 6.89e-01 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 1.861 0.508 - - 4.48e-03 1.86e-03 59.330 57
CPL -4.716 0.000 40.8 8.4 3.03e+01 1.98e+01 50.120 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.861 0.508 - - 4.48e-03 1.86e-03 59.330 57
CPL -4.716 0.000 40.8 8.4 3.03e+01 1.98e+01 50.120 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 0.256 0.000 0.256
T90 0.256 0.000 0.256
T50 0.256 0.000 0.256
Peak 0.256 0.000 0.256
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
152.7954 +45.5917 0.0430 19.6 -147.4 0.0229 4.5 TRIG_00362330
------------------------------------------
Foreground time interval of the image:
0.000 0.256 (delta_t = 0.256 [sec])
Background time interval of the image:
-60.760 -57.401 (delta_t = 3.359 [sec])
-56.760 -5.760 (delta_t = 51.000 [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 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86094 ( -0.469026 0.546205 )
Norm@50keV : 4.47820E-03 ( -0.00189334 0.00183159 )
------------------------------------------------------------
# Chi-Squared = 59.33 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.907160e-01
Photon flux (15-150 keV) in 0.256 sec: 0.630114 ( -0.236007 0.236077 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0461e-08 ( -4.28316e-09 4.45087e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.71611 ( )
Epeak [keV] : 40.8170 ( -7.15602 9.65591 )
Norm@50keV : 30.2929 ( -30.2929 9.39666 )
------------------------------------------------------------
# Chi-Squared = 50.12 using 59 PHA bins.
# Reduced chi-squared = 0.8951 for 56 degrees of freedom
# Null hypothesis probability = 6.957826e-01
Photon flux (15-150 keV) in 0.256 sec: 0.661764 ( -0.207424 0.210024 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99868 ( -1463.6 -1448.61 )
beta : -4.29508 ( 4.30481 1.9246 )
Epeak [keV] : 39.5420 ( -7.64737 9.98745 )
Norm@50keV : 52.4269 ( -52.7544 151.058 )
------------------------------------------------------------
# Chi-Squared = 49.89 using 59 PHA bins.
# Reduced chi-squared = 0.9070 for 55 degrees of freedom
# Null hypothesis probability = 6.698615e-01
Photon flux (15-150 keV) in 0.256 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 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86094 ( -0.469026 0.546205 )
Norm@50keV : 4.47820E-03 ( -0.00189334 0.00183159 )
------------------------------------------------------------
# Chi-Squared = 59.33 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.907160e-01
Photon flux (15-150 keV) in 0.256 sec: 0.630114 ( -0.236007 0.236077 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0461e-08 ( -4.28316e-09 4.45087e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.71611 ( )
Epeak [keV] : 40.8170 ( -7.15602 9.65591 )
Norm@50keV : 30.2929 ( -30.2929 9.39666 )
------------------------------------------------------------
# Chi-Squared = 50.12 using 59 PHA bins.
# Reduced chi-squared = 0.8951 for 56 degrees of freedom
# Null hypothesis probability = 6.957826e-01
Photon flux (15-150 keV) in 0.256 sec: 0.661764 ( -0.207424 0.210024 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99943 ( -3339.97 -3324.97 )
beta : -4.28573 ( 4.29728 1.91641 )
Epeak [keV] : 39.4637 ( -7.60666 10.0377 )
Norm@50keV : 53.1899 ( -53.1623 150.889 )
------------------------------------------------------------
# Chi-Squared = 49.89 using 59 PHA bins.
# Reduced chi-squared = 0.9070 for 55 degrees of freedom
# Null hypothesis probability = 6.698619e-01
Photon flux (15-150 keV) in 0.256 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Sep 11 16:44:26 EDT 2009