batgrbproduct Analysis for Trigger=356120
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): Wed Jul 1 17:01:19 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356120/GCN5_download_cron
======================================================================
Trigger: 00356120 Segment: 000
BAT Trigger Time: 268089189.052 [s; MET]
Trigger Stop: 268089189.116 [s; MET]
UTC: 2009-06-30T21:13:04.180140 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 245.205910444471 Dec: 22.3672248567218 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.78
Image Trigger?: NO
Rate S/N Ratio: 6.48074069840786 [ if not an image trigger ]
Image S/N Ratio: 5.78
Flight Position: [ source = BAT ]
RA: 245.205910444471 Dec: 22.3672248567218 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.202022514646 Dec: 22.3932422154645 [deg; J2000]
{ 16h 20m 48.5s , +22d 23' 35.7" }
+/- 4.66149610309253 [arcmin] (estimated 90% radius based on SNR)
+/- 2.97101169434512 [arcmin] (formal 1-sigma fit error)
SNR: 3.37351154459494
Angular difference between Flight and Ground position is 1.575874 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001473 0.008355 0.007520 -0.002601
0.002362 0.002337 0.001886 0.001443 [error]
Peak 0.001473 0.008355 0.007520 -0.002601
0.002362 0.002337 0.001886 0.001443 [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 1.31e-09 1.59e-09 1.41e-09 2.18e-09 5.04e-09 6.29e-09 erg/cm2
Error 9.04e-10 8.95e-10 9.60e-10 2.78e-09 2.88e-09 4.24e-09 erg/cm2
Peak flux Power-law 6.72e-01 4.50e-01 1.99e-01 1.24e-01 1.37e+00 1.44e+00 ph/cm2/s
Error 4.67e-01 2.55e-01 1.33e-01 1.48e-01 7.93e-01 1.13e+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 3.78e-01 9.09e-01 4.50e-01 1.76e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.31e-01 3.69e-01 2.14e-01 6.74e-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 1.71e+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 2.144 0.742 - - 8.47e-03 4.96e-03 57.840 57
CPL -4.967 0.000 50.5 8.0 3.04e+01 2.53e+01 44.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.144 0.742 - - 8.47e-03 4.96e-03 57.840 57
CPL -4.967 0.000 50.5 8.0 3.04e+01 2.53e+01 44.850 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.2020 +22.3932 0.0571 39.2 7.1 0.0137 3.4 TRIG_00356120
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.052 -5.052 (delta_t = 55.000 [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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14433 ( -0.69092 0.794044 )
Norm@50keV : 8.46845E-03 ( -0.00502057 0.00489328 )
------------------------------------------------------------
# Chi-Squared = 57.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.439042e-01
Photon flux (15-150 keV) in 0.064 sec: 1.36670 ( -0.781948 0.804886 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.04279e-09 ( -2.87034e-09 2.8879e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.96740 ( )
Epeak [keV] : 50.5337 ( -7.87713 8.16679 )
Norm@50keV : 30.3986 ( -30.3994 20.1321 )
------------------------------------------------------------
# Chi-Squared = 44.85 using 59 PHA bins.
# Reduced chi-squared = 0.8010 for 56 degrees of freedom
# Null hypothesis probability = 8.573151e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99889 ( -1729.5 -1714.56 )
beta : -9.37167 ( 10 19.9954 )
Epeak [keV] : 50.4573 ( -7.77214 8.2206 )
Norm@50keV : 31.7183 ( -31.7183 59.703 )
------------------------------------------------------------
# Chi-Squared = 44.86 using 59 PHA bins.
# Reduced chi-squared = 0.8156 for 55 degrees of freedom
# Null hypothesis probability = 8.338199e-01
Photon flux (15-150 keV) in 0.064 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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14433 ( -0.69092 0.794044 )
Norm@50keV : 8.46845E-03 ( -0.00502057 0.00489328 )
------------------------------------------------------------
# Chi-Squared = 57.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.439042e-01
Photon flux (15-150 keV) in 0.064 sec: 1.36670 ( -0.781948 0.804886 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.04279e-09 ( -2.87034e-09 2.8879e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.96740 ( )
Epeak [keV] : 50.5337 ( -7.87713 8.16679 )
Norm@50keV : 30.3986 ( -30.3994 20.1321 )
------------------------------------------------------------
# Chi-Squared = 44.85 using 59 PHA bins.
# Reduced chi-squared = 0.8010 for 56 degrees of freedom
# Null hypothesis probability = 8.573151e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99889 ( -1729.5 -1714.56 )
beta : -9.37167 ( 10 19.9954 )
Epeak [keV] : 50.4573 ( -7.77214 8.2206 )
Norm@50keV : 31.7183 ( -31.7183 59.703 )
------------------------------------------------------------
# Chi-Squared = 44.86 using 59 PHA bins.
# Reduced chi-squared = 0.8156 for 55 degrees of freedom
# Null hypothesis probability = 8.338199e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jul 1 17:46:22 EDT 2009