batgrbproduct Analysis for Trigger=574935
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Oct 19 01:14:18 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger574935/GCN5_download_cron
======================================================================
Trigger: 00574935 Segment: 000
BAT Trigger Time: 403793280 [s; MET]
Trigger Stop: 403793344 [s; MET]
UTC: 2013-10-18T12:47:48.834540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 98.4618116856018 Dec: -19.8820304441863 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.77
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.77
Flight Position: [ source = BAT ]
RA: 98.4618116856018 Dec: -19.8820304441863 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 98.4726313183412 Dec: -19.8968346584733 [deg; J2000]
{ 06h 33m 53.4s , -19d 53' 48.6" }
+/- 1.28436714156551 [arcmin] (estimated 90% radius based on SNR)
+/- 0.53676613887313 [arcmin] (formal 1-sigma fit error)
SNR: 21.2739490019279
Angular difference between Flight and Ground position is 1.077798 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 73.2159999608994 +/- 18.9734095979543
Measured from: 24.8080001473427
to: 98.024000108242 [s; relative to TRIGTIME]
T50: 31.1680000424385 +/- 5.17173854766535
Measured from: 39.4640001058578
to: 70.6320001482964 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 59.4120000004768
to: 60.4120000004768 [s; relative to TRIGTIME]
Total Fluence
Measured from: 21.0960000157356
to: 117.736000001431 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.990602 0.908690 0.359713 0.038894
0.049879 0.050774 0.043515 0.037218 [error]
Peak 0.024103 0.025550 0.011458 0.008006
0.005047 0.005299 0.004478 0.003797 [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 2.98e-07 3.49e-07 2.95e-07 4.22e-07 1.09e-06 1.36e-06 erg/cm2
Error 2.79e-08 2.41e-08 3.90e-08 1.08e-07 8.79e-08 1.54e-07 erg/cm2
Peak flux Power-law 1.96e-01 1.62e-01 9.05e-02 7.46e-02 4.82e-01 5.23e-01 ph/cm2/s
Error 6.61e-02 3.90e-02 3.50e-02 5.57e-02 1.16e-01 1.31e-01 ph/cm2/s
Fluence Cutoff-PL 2.87e-07 3.69e-07 2.76e-07 1.55e-07 1.03e-06 1.09e-06 erg/cm2
Error 3.06e-08 3.22e-08 4.83e-08 1.28e-07 1.08e-07 2.30e-07 erg/cm2
Peak flux Cutoff-PL 1.90e-01 1.73e-01 8.97e-02 3.69e-02 4.76e-01 4.89e-01 ph/cm2/s
Error 7.21e-02 5.30e-02 4.06e-02 5.75e-02 1.17e-01 1.04e-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 2.243 0.140 - - 1.20e-03 1.13e-04 57.430 57
CPL 1.713 0.476 20.8 0.0 2.50e-03 0.00e+00 54.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.840 0.441 - - 3.44e-03 1.03e-03 75.590 57
CPL 1.357 0.000 54.7 0.0 6.64e-03 0.00e+00 75.380 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: 59.392000 sec.
T50 in the 50-300 keV band: 40.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.640 21.096 117.736
T90 73.216 24.808 98.024
T50 31.168 39.464 70.632
Peak 1.000 59.412 60.412
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
98.4726 -19.8968 0.0091 1.9 59.9 1.5387 21.3 TRIG_00574935
------------------------------------------
Foreground time interval of the image:
21.096 70.601 (delta_t = 49.505 [sec])
Background time interval of the image:
-239.000 21.096 (delta_t = 260.096 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 21.096 sec. to 117.736 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24342 ( -0.136838 0.142549 )
Norm@50keV : 1.19550E-03 ( -0.000113896 0.000112437 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.43 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.590229e-01
Photon flux (15-150 keV) in 96.64 sec: 0.202549 ( -0.0136134 0.0136193 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09336e-06 ( -8.715e-08 8.86878e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 21.096 sec. to 117.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71285 ( -0.665749 0.285329 )
Epeak [keV] : 20.8062 ( )
Norm@50keV : 2.49867E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.91 using 59 PHA bins.
# Reduced chi-squared = 0.9806 for 56 degrees of freedom
# Null hypothesis probability = 5.160712e-01
Photon flux (15-150 keV) in 96.64 sec: 0.197604 ( -0.014487 0.014535 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02665e-06 ( -1.04822e-07 1.11774e-07 ) ergs/cm2
Band function
Time interval is from 21.096 sec. to 117.736 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.600205 ( -1.87141 0.129011 )
beta : -2.42157 ( 2.42342 0.206128 )
Epeak [keV] : 23.7142 ( -6.51686 7.0365 )
Norm@50keV : 0.146021 ( -0.144961 248.128 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.35 using 59 PHA bins.
# Reduced chi-squared = 0.9700 for 55 degrees of freedom
# Null hypothesis probability = 5.379760e-01
Photon flux (15-150 keV) in 96.64 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] : 8.40608 (-0.676291 0.73636)
R^2/D10^2 : 0.175136 (-0.0503836 0.071225)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.82 using 59 PHA bins.
# Reduced chi-squared = 1.646 for 57 degrees of freedom
# Null hypothesis probability = 1.535628e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.238e-07 2.580e-08
25- 50 4.261e-07 3.513e-08
50-150 1.313e-07 2.899e-08
15-150 7.813e-07 5.982e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 44.5296 (-7.65235 10.348)
Norm : 1.20887 (-0.155824 0.184786)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.85 using 59 PHA bins.
# Reduced chi-squared = 0.9798 for 57 degrees of freedom
# Null hypothesis probability = 5.184392e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.773e-07 2.629e-08
25- 50 3.814e-07 2.730e-08
50-150 3.305e-07 6.630e-08
15-150 9.891e-07 8.707e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.04974 (-0.920052 1.01764)
R1^2/D10^2 : 0.990580 (-0.488905 0.716672)
kT2 [keV] : 15.8020 (-3.15881 5.41052)
R2^2/D10^2 : 9.52376E-03 (-0.00677057 0.0145724)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.68 using 59 PHA bins.
# Reduced chi-squared = 0.9760 for 55 degrees of freedom
# Null hypothesis probability = 5.252211e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.898e-07 7.794e-08
25- 50 3.604e-07 1.029e-07
50-150 3.514e-07 1.883e-07
15-150 1.002e-06 3.069e-07
Peak spectrum fit
Power-law model
Time interval is from 59.412 sec. to 60.412 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83951 ( -0.417398 0.464283 )
Norm@50keV : 3.44280E-03 ( -0.00105307 0.00100264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.59 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.026511e-02
Photon flux (15-150 keV) in 1 sec: 0.481874 ( -0.115983 0.115984 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16611e-08 ( -9.28692e-09 9.75095e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 59.412 sec. to 60.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35701 ( )
Epeak [keV] : 54.7170 ( )
Norm@50keV : 6.64362E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.38 using 59 PHA bins.
# Reduced chi-squared = 1.346 for 56 degrees of freedom
# Null hypothesis probability = 4.310136e-02
Photon flux (15-150 keV) in 1 sec: 0.475637 ( -0.117992 0.116718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99871e-08 ( -1.00654e-08 1.1015e-08 ) ergs/cm2
Band function
Time interval is from 59.412 sec. to 60.412 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.94719 ( -0.5999 0.468408 )
Epeak [keV] : 20.7586 ( -20.7629 9.10007 )
Norm@50keV : 1693.52 ( -403.527 4.64341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.85 using 59 PHA bins.
# Reduced chi-squared = 1.361 for 55 degrees of freedom
# Null hypothesis probability = 3.875054e-02
Photon flux (15-150 keV) in 1 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] : 10.5375 (-2.77553 3.66546)
R^2/D10^2 : 0.190382 (-0.12793 0.401681)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.92 using 59 PHA bins.
# Reduced chi-squared = 1.384 for 57 degrees of freedom
# Null hypothesis probability = 2.891452e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.374e-09 2.401e-09
25- 50 1.169e-08 5.056e-09
50-150 7.085e-09 4.307e-09
15-150 2.315e-08 1.167e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 84.2414 (-45.4178 -84.2414)
Norm : 2.24743 (-0.641934 1.02152)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.37 using 59 PHA bins.
# Reduced chi-squared = 1.322 for 57 degrees of freedom
# Null hypothesis probability = 5.203186e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.849e-09 3.554e-09
25- 50 9.746e-09 5.764e-09
50-150 1.423e-08 1.166e-08
15-150 2.983e-08 2.054e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.54408 (-2.64114 7.03518)
R1^2/D10^2 : 2.67861 (-2.48426 7.51977)
kT2 [keV] : 15.7689 (-5.87065 -15.7669)
R2^2/D10^2 : 3.33299E-02 (-0.0331133 0.187011)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.23 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Null hypothesis probability = 3.634742e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.092e-09 3.780e-09
25- 50 9.382e-09 5.040e-09
50-150 1.240e-08 8.180e-09
15-150 2.788e-08 1.519e-08
Plot creation:
Sat Oct 19 01:43:06 EDT 2013