batgrbproduct Analysis for Trigger=419554
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 Apr 16 12:22:54 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger419554/GCN5_download_cron
======================================================================
Trigger: 00419554 Segment: 000
BAT Trigger Time: 293055936 [s; MET]
Trigger Stop: 293056640 [s; MET]
UTC: 2010-04-15T20:25:30.289960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 65.6252094109186 Dec: -57.0894850579196 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.22
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.22
Flight Position: [ source = BAT ]
RA: 65.6252094109186 Dec: -57.0894850579196 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 65.6547768709154 Dec: -57.0843574314834 [deg; J2000]
{ 04h 22m 37.1s , -57d 05' 03.7" }
+/- 4.4608808259856 [arcmin] (estimated 90% radius based on SNR)
+/- 2.48325444534656 [arcmin] (formal 1-sigma fit error)
SNR: 3.59231685185479
Angular difference between Flight and Ground position is 1.011863 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
T50: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 704 second)
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.266916 0.499761 0.108814 0.062532
0.081506 0.085011 0.074784 0.071599 [error]
Peak 0.266916 0.499761 0.108814 0.062532
0.081506 0.085011 0.074784 0.071599 [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 1.12e-07 1.46e-07 1.39e-07 2.36e-07 4.75e-07 6.32e-07 erg/cm2
Error 3.70e-08 3.93e-08 6.74e-08 2.29e-07 1.57e-07 3.11e-07 erg/cm2
Peak flux Power-law 1.99e-02 1.44e-02 6.90e-03 4.67e-03 4.35e-02 4.59e-02 ph/cm2/s
Error 6.56e-03 3.77e-03 3.20e-03 4.97e-03 1.10e-02 1.20e-02 ph/cm2/s
Fluence Cutoff-PL 1.07e-07 1.91e-07 3.80e-08 2.15e-10 3.36e-07 3.37e-07 erg/cm2
Error 3.28e-08 5.57e-08 4.31e-08 5.67e-08 1.09e-07 1.34e-07 erg/cm2
Peak flux Cutoff-PL 1.86e-02 1.94e-02 2.16e-03 6.50e-06 4.01e-02 4.01e-02 ph/cm2/s
Error 5.72e-03 5.31e-03 3.54e-03 1.41e-03 9.81e-03 9.81e-03 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 2.065 0.507 - - 2.80e-04 1.00e-04 67.230 57
CPL -4.490 0.000 30.8 4.9 7.35e+00 4.69e+00 63.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.062 0.497 - - 2.81e-04 1.00e-04 67.640 57
CPL -4.493 0.000 30.7 5.0 7.56e+00 4.75e+00 64.130 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 704.000 0.000 704.000
T90 704.000 0.000 704.000
T50 704.000 0.000 704.000
Peak 704.000 0.000 704.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
65.6548 -57.0844 0.0536 30.8 -163.2 0.8435 3.6 TRIG_00419554
------------------------------------------
Foreground time interval of the image:
0.000 183.047 (delta_t = 183.047 [sec])
Background time interval of the image:
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 183.047 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06532 ( -0.470388 0.542864 )
Norm@50keV : 2.80215E-04 ( -0.000102127 9.85616e-05 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 57 degrees of freedom
# Null hypothesis probability = 1.666854e-01
Photon flux (15-150 keV) in 183 sec: 4.33443E-02 ( -0.0111311 0.0111355 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.74962e-07 ( -1.51222e-07 1.6288e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49021 ( )
Epeak [keV] : 30.7551 ( -4.61427 5.24805 )
Norm@50keV : 7.35305 ( -7.47358 1.91032 )
------------------------------------------------------------
# Chi-Squared = 63.65 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 56 degrees of freedom
# Null hypothesis probability = 2.252781e-01
Photon flux (15-150 keV) in 183 sec: 3.99103E-02 ( -0.009893 0.0099061 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.36499e-07 ( -8.88593e-08 1.28724e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90182 ( -31.4196 -21.4359 )
beta : -4.25927 ( 4.27364 2.0571 )
Epeak [keV] : 29.8802 ( -6.05628 5.97158 )
Norm@50keV : 16.4309 ( -16.3892 4.03882 )
------------------------------------------------------------
# Chi-Squared = 63.27 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.075563e-01
Photon flux (15-150 keV) in 183 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] : 7.83224 (-1.53319 1.99112)
R^2/D10^2 : 5.51223E-02 (-0.0332279 0.0760372)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.76 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.243305e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-07 5.680e-08
25- 50 1.857e-07 9.303e-08
50-150 4.545e-08 3.378e-08
15-150 3.412e-07 1.788e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.2887 (-23.3745 88.3456)
Norm : 0.254951 (-0.0966538 0.170651)
------------------------------------------------------------
# Chi-Squared = 66.75 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.768037e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.126e-07 4.845e-08
25- 50 1.584e-07 7.140e-08
50-150 1.458e-07 1.045e-07
15-150 4.167e-07 2.377e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.967 ( )
R1^2/D10^2 : 4.23145E-06 (-4.05702e-06 3.67755e-06)
kT2 [keV] : 7.36645 (-1.13946 1.77827)
R2^2/D10^2 : 6.66755E-02 (-0.0357727 0.0555438)
------------------------------------------------------------
# Chi-Squared = 64.76 using 59 PHA bins.
# Chi-Squared = 61.85 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 55 degrees of freedom
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 1.727678e-01
# Null hypothesis probability = 2.448074e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-07 2.821e-02
25- 50 1.857e-07 2.134e-01
50-150 4.562e-08 5.977e+00
15-150 3.414e-07 5.609e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06155 ( -0.460924 0.533093 )
Norm@50keV : 2.81428E-04 ( -0.000101811 9.83132e-05 )
------------------------------------------------------------
# Chi-Squared = 67.64 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.581571e-01
Photon flux (15-150 keV) in 183 sec: 4.34530E-02 ( -0.0110023 0.011008 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.76865e-07 ( -1.50989e-07 1.62663e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49287 ( )
Epeak [keV] : 30.6678 ( -4.6032 5.34166 )
Norm@50keV : 7.56216 ( -7.66714 1.83333 )
------------------------------------------------------------
# Chi-Squared = 64.13 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 56 degrees of freedom
# Null hypothesis probability = 2.130550e-01
Photon flux (15-150 keV) in 183 sec: 4.01446E-02 ( -0.0098053 0.0098126 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3778e-07 ( -8.84293e-08 1.32064e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91228 ( -33.7537 -23.7568 )
beta : -4.27340 ( 4.27818 2.05675 )
Epeak [keV] : 29.8285 ( -6.18614 5.86208 )
Norm@50keV : 16.9785 ( -16.9603 4.18906 )
------------------------------------------------------------
# Chi-Squared = 63.76 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 55 degrees of freedom
# Null hypothesis probability = 1.957189e-01
Photon flux (15-150 keV) in 183 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] : 7.81711 (-1.5158 1.95845)
R^2/D10^2 : 5.58248E-02 (-0.0332492 0.0753471)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 65.16 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 57 degrees of freedom
# Null hypothesis probability = 2.140353e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.109e-07 6.597e-08
25- 50 1.864e-07 9.676e-08
50-150 4.533e-08 3.445e-08
15-150 3.426e-07 1.658e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.3947 (-23.2654 85.3412)
Norm : 0.255449 (-0.0950258 0.165839)
------------------------------------------------------------
# Chi-Squared = 67.16 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.681153e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.128e-07 4.824e-08
25- 50 1.589e-07 7.985e-08
50-150 1.466e-07 1.048e-07
15-150 4.183e-07 2.085e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.999 ( )
R1^2/D10^2 : 4.24917E-06 (-4.05703e-06 3.67301e-06)
kT2 [keV] : 7.35446 (-1.12928 1.75057)
R2^2/D10^2 : 6.74377E-02 (-0.0359724 0.0552481)
------------------------------------------------------------
# Chi-Squared = 65.16 using 59 PHA bins.
# Chi-Squared = 62.22 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 1.641275e-01
# Null hypothesis probability = 2.347216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.109e-07 6.860e+00
25- 50 1.864e-07 5.382e+01
50-150 4.532e-08 1.428e+03
15-150 3.426e-07 1.286e+03
Plot creation:
Fri Apr 16 12:30:00 EDT 2010