batgrbproduct Analysis for Trigger=355359
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): Mon Jun 22 09:38:05 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355359/GCN5_download_cron
======================================================================
Trigger: 00355359 Segment: 000
BAT Trigger Time: 267314850.496 [s; MET]
Trigger Stop: 267314850.56 [s; MET]
UTC: 2009-06-21T22:07:25.649220 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 313.432293721725 Dec: 69.0133669114323 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.88
Image Trigger?: NO
Rate S/N Ratio: 43.3820239269677 [ if not an image trigger ]
Image S/N Ratio: 8.88
Flight Position: [ source = BAT ]
RA: 313.432293721725 Dec: 69.0133669114323 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 313.455229041811 Dec: 69.0341406522038 [deg; J2000]
{ 20h 53m 49.3s , +69d 02' 02.9" }
+/- 1.73964561709147 [arcmin] (estimated 90% radius based on SNR)
+/- 0.572398665924131 [arcmin] (formal 1-sigma fit error)
SNR: 13.7912289924407
Angular difference between Flight and Ground position is 1.340243 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 0.140000015497208 +/- 0.0368781879146241
Measured from: -0.0119999051094055
to: 0.128000110387802 [s; relative to TRIGTIME]
T50: 0.0439999997615814 +/- 0.017888553416166
Measured from: 0.0360001027584076
to: 0.080000102519989 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.437999993562698
to: 0.562000006437302 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0279999971389771
to: 0.148000001907349 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.016707 0.026445 0.033646 0.020123
0.003157 0.003726 0.003965 0.003327 [error]
Peak 0.016139 0.026923 0.033723 0.020149
0.003179 0.003747 0.003977 0.003327 [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 4.13e-09 1.15e-08 2.61e-08 1.58e-07 7.05e-08 2.00e-07 erg/cm2
Error 1.12e-09 1.85e-09 3.62e-09 5.25e-08 9.91e-09 5.42e-08 erg/cm2
Peak flux Power-law 7.20e-01 1.10e+00 1.25e+00 2.74e+00 3.89e+00 5.81e+00 ph/cm2/s
Error 2.00e-01 1.83e-01 1.69e-01 8.29e-01 4.99e-01 8.92e-01 ph/cm2/s
Fluence Cutoff-PL 4.12e-09 1.15e-08 2.62e-08 1.57e-07 7.05e-08 2.00e-07 erg/cm2
Error 1.12e-09 1.85e-09 3.63e-09 5.21e-08 9.92e-09 5.37e-08 erg/cm2
Peak flux Cutoff-PL 7.19e-01 1.10e+00 1.26e+00 2.72e+00 3.89e+00 5.80e+00 ph/cm2/s
Error 1.99e-01 1.84e-01 1.69e-01 8.23e-01 4.99e-01 8.87e-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 0.820 0.229 - - 3.46e-02 4.47e-03 45.070 57
CPL 0.819 0.231 9999.4 0.0 3.48e-02 2.59e-02 45.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.807 0.229 - - 3.38e-02 4.40e-03 43.470 57
CPL 0.803 0.231 9999.4 0.0 3.41e-02 2.70e-02 43.470 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.176 -0.028 0.148
T90 0.140 -0.012 0.128
T50 0.044 0.036 0.080
Peak 1.000 -0.438 0.562
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
313.4552 +69.0341 0.0140 23.9 133.9 0.1008 13.8 TRIG_00355359
------------------------------------------
Foreground time interval of the image:
-0.028 0.148 (delta_t = 0.176 [sec])
Background time interval of the image:
-239.496 -0.028 (delta_t = 239.468 [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 -0.028 sec. to 0.148 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.820127 ( -0.23405 0.224721 )
Norm@50keV : 3.45585E-02 ( -0.0044925 0.00445368 )
------------------------------------------------------------
# Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.7906 for 57 degrees of freedom
# Null hypothesis probability = 8.735276e-01
Photon flux (15-150 keV) in 0.176 sec: 3.96940 ( -0.507768 0.508516 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04825e-08 ( -9.87756e-09 9.94104e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.028 sec. to 0.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.819494 ( -0.240105 0.222534 )
Epeak [keV] : 9999.36 ( -10000 -10000 )
Norm@50keV : 3.48163E-02 ( -0.00443886 0.0474399 )
------------------------------------------------------------
# Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 56 degrees of freedom
# Null hypothesis probability = 8.518658e-01
Photon flux (15-150 keV) in 0.176 sec: 3.96848 ( -0.50762 0.50838 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05077e-08 ( -9.88451e-09 9.94787e-09 ) ergs/cm2
Band function
Time interval is from -0.028 sec. to 0.148 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.900201 ( 0.900201 0.900201 )
beta : -0.820127 ( -0.224855 0.233977 )
Epeak [keV] : 15.2914 ( -15.2914 -15.2914 )
Norm@50keV : 4.92021E-02 ( 26951.6 -0.0492022 )
------------------------------------------------------------
# Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8194 for 55 degrees of freedom
# Null hypothesis probability = 8.280336e-01
Photon flux (15-150 keV) in 0.176 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.5296 (-4.24947 5.85511)
R^2/D10^2 : 0.105863 (-0.0493527 0.0822059)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.64 using 59 PHA bins.
# Reduced chi-squared = 0.9761 for 57 degrees of freedom
# Null hypothesis probability = 5.264048e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.967e-09 5.775e-10
25- 50 1.105e-08 2.314e-09
50-150 4.943e-08 1.253e-08
15-150 6.244e-08 1.371e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 15.0954 (-15.0954 -15.0954)
------------------------------------------------------------
# Chi-Squared = 72.00 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 57 degrees of freedom
# Null hypothesis probability = 8.703452e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.614e-09 3.597e-09
25- 50 1.272e-08 6.974e-09
50-150 2.791e-08 1.527e-08
15-150 4.724e-08 2.585e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.0815 (-10.308 6.095)
R1^2/D10^2 : 0.453512 (-0.287899 123.574)
kT2 [keV] : 77.0588 (-74.8423 -77.623)
R2^2/D10^2 : 4.01045E-03 (-0.00369633 0.0678105)
------------------------------------------------------------
# Chi-Squared = 45.88 using 59 PHA bins.
# Reduced chi-squared = 0.8342 for 55 degrees of freedom
# Null hypothesis probability = 8.046635e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.217e-09 1.789e-09
25- 50 1.255e-08 6.648e-09
50-150 5.377e-08 2.904e-08
15-150 6.954e-08 3.597e-08
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.028 sec. to 0.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.807465 ( -0.234022 0.224184 )
Norm@50keV : 3.38478E-02 ( -0.00442407 0.00438151 )
------------------------------------------------------------
# Chi-Squared = 43.47 using 59 PHA bins.
# Reduced chi-squared = 0.7626 for 57 degrees of freedom
# Null hypothesis probability = 9.066972e-01
Photon flux (15-150 keV) in 0.18 sec: 3.88922 ( -0.498565 0.499357 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09758e-08 ( -9.91363e-09 9.97238e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.028 sec. to 0.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.803466 ( -0.238013 0.223941 )
Epeak [keV] : 9999.36 ( -9999.26 -9999.26 )
Norm@50keV : 3.40985E-02 ( -0.00437642 0.0495373 )
------------------------------------------------------------
# Chi-Squared = 43.47 using 59 PHA bins.
# Reduced chi-squared = 0.7762 for 56 degrees of freedom
# Null hypothesis probability = 8.890973e-01
Photon flux (15-150 keV) in 0.18 sec: 3.88835 ( -0.49843 0.49923 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1001e-08 ( -9.91926e-09 9.98046e-09 ) ergs/cm2
Band function
Time interval is from -0.028 sec. to 0.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.937559 ( 0.937556 0.937556 )
beta : -0.807465 ( -0.224084 0.234013 )
Epeak [keV] : 13.6066 ( -13.6066 -13.6066 )
Norm@50keV : 4.96708E-02 ( -0.0236381 1.11023e+06 )
------------------------------------------------------------
# Chi-Squared = 43.47 using 59 PHA bins.
# Reduced chi-squared = 0.7903 for 55 degrees of freedom
# Null hypothesis probability = 8.692264e-01
Photon flux (15-150 keV) in 0.18 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.7051 (-4.28921 5.92287)
R^2/D10^2 : 0.101890 (-0.047579 0.0792689)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.62 using 59 PHA bins.
# Reduced chi-squared = 0.9407 for 57 degrees of freedom
# Null hypothesis probability = 6.027527e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.957e-09 5.269e-10
25- 50 1.103e-08 2.686e-09
50-150 5.002e-08 1.067e-08
15-150 6.301e-08 1.219e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 14.7653 (-14.7653 -14.7653)
------------------------------------------------------------
# Chi-Squared = 71.40 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.502027e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.615e-09 3.636e-09
25- 50 1.272e-08 7.048e-09
50-150 2.791e-08 1.556e-08
15-150 4.725e-08 2.614e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.3171 (-8.43718 5.98924)
R1^2/D10^2 : 0.424665 (-0.265637 6.464)
kT2 [keV] : 80.6927 (-51.1355 -81.3012)
R2^2/D10^2 : 3.56909E-03 (-0.00302702 0.0490318)
------------------------------------------------------------
# Chi-Squared = 43.92 using 59 PHA bins.
# Reduced chi-squared = 0.7985 for 55 degrees of freedom
# Null hypothesis probability = 8.582191e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.181e-09 1.781e-09
25- 50 1.257e-08 6.947e-09
50-150 5.405e-08 2.815e-08
15-150 6.981e-08 3.753e-08
Plot creation:
Mon Jun 22 10:39:45 EDT 2009