batgrbproduct Analysis for Trigger=598819
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): Tue May 13 09:16:33 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger598819/GCN5_download_cron
======================================================================
Trigger: 00598819 Segment: 000
BAT Trigger Time: 421615921.216 [s; MET]
Trigger Stop: 421615922.24 [s; MET]
UTC: 2014-05-12T19:31:49.213860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 289.370983958512 Dec: -15.1000413136453 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.32
Image Trigger?: NO
Rate S/N Ratio: 38.262252939418 [ if not an image trigger ]
Image S/N Ratio: 9.32
Flight Position: [ source = BAT ]
RA: 289.370983958512 Dec: -15.1000413136453 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 289.366409554665 Dec: -15.0874336662933 [deg; J2000]
{ 19h 17m 27.9s , -15d 05' 14.8" }
+/- 1.08987511597178 [arcmin] (estimated 90% radius based on SNR)
+/- 0.414527292071445 [arcmin] (formal 1-sigma fit error)
SNR: 26.8981890466025
Angular difference between Flight and Ground position is 0.801531 arcmin
Partial Coding Fraction: 0.3515625 [ including projection effects ]
Duration
T90: 154.803999960423 +/- 4.78706592379787
Measured from: -6.05199992656708
to: 148.752000033855 [s; relative to TRIGTIME]
T50: 85.7879999279976 +/- 41.4023807773294
Measured from: 41.1360000967979
to: 126.924000024796 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 121.955999970436
to: 122.955999970436 [s; relative to TRIGTIME]
Total Fluence
Measured from: -22.8400000333786
to: 186.291999995708 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.110041 7.220552 6.195047 1.970510
0.116699 0.115953 0.100333 0.082537 [error]
Peak 0.172097 0.284955 0.249979 0.090249
0.008512 0.009746 0.009623 0.007320 [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 1.74e-06 3.31e-06 4.85e-06 1.52e-05 1.37e-05 2.51e-05 erg/cm2
Error 7.95e-08 8.71e-08 1.09e-07 8.20e-07 2.79e-07 8.49e-07 erg/cm2
Peak flux Power-law 2.08e+00 2.23e+00 1.70e+00 2.11e+00 6.80e+00 8.11e+00 ph/cm2/s
Error 1.55e-01 1.00e-01 7.94e-02 2.08e-01 2.80e-01 3.22e-01 ph/cm2/s
Fluence Cutoff-PL 1.72e-06 3.29e-06 4.86e-06 1.49e-05 1.37e-05 2.48e-05 erg/cm2
Error 1.01e-07 7.97e-08 1.09e-07 1.72e-06 2.77e-07 1.73e-06 erg/cm2
Peak flux Cutoff-PL 1.89e+00 2.29e+00 1.77e+00 1.42e+00 6.66e+00 7.37e+00 ph/cm2/s
Error 1.98e-01 1.11e-01 9.64e-02 4.03e-01 2.96e-01 5.13e-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 1.448 0.039 - - 6.85e-03 1.41e-04 45.880 57
CPL 1.445 0.094 9998.2 0.0 6.88e-03 6.55e-04 45.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.392 0.069 - - 5.60e-02 2.19e-03 61.510 57
CPL 0.988 0.301 136.7 115.5 8.64e-02 2.81e-02 55.760 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: 149.824000 sec.
T50 in the 50-300 keV band: 58.560000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 209.132 -22.840 186.292
T90 154.804 -6.052 148.752
T50 85.788 41.136 126.924
Peak 1.000 121.956 122.956
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
289.3664 -15.0874 0.0072 41.7 163.9 3.9523 26.9 TRIG_00598819
------------------------------------------
Foreground time interval of the image:
-22.840 14.185 (delta_t = 37.025 [sec])
Background time interval of the image:
-239.216 -22.840 (delta_t = 216.376 [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 -22.840 sec. to 186.292 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44816 ( -0.0391608 0.0390647 )
Norm@50keV : 6.85288E-03 ( -0.000141077 0.000140867 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.88 using 59 PHA bins.
# Reduced chi-squared = 0.8048 for 57 degrees of freedom
# Null hypothesis probability = 8.542836e-01
Photon flux (15-150 keV) in 209.1 sec: 0.844137 ( -0.0206242 0.0207205 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37168e-05 ( -2.78693e-07 2.78764e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -22.840 sec. to 186.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44481 ( -0.136739 0.0507141 )
Epeak [keV] : 9998.24 ( )
Norm@50keV : 6.87536E-03 ( -0.000139412 0.00117149 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.87 using 59 PHA bins.
# Reduced chi-squared = 0.8190 for 56 degrees of freedom
# Null hypothesis probability = 8.310463e-01
Photon flux (15-150 keV) in 209.1 sec: 0.842626 ( -0.009872 0.021634 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37289e-05 ( -2.762e-07 2.76807e-07 ) ergs/cm2
Band function
Time interval is from -22.840 sec. to 186.292 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33197 ( 1.27839 0.925278 )
beta : -1.46173 ( 1.46537 0.055036 )
Epeak [keV] : 247.133 ( -187.989 -187.989 )
Norm@50keV : 7.89407E-03 ( -0.00113538 814991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.66 using 59 PHA bins.
# Reduced chi-squared = 0.8302 for 55 degrees of freedom
# Null hypothesis probability = 8.110847e-01
Photon flux (15-150 keV) in 209.1 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] : 19.1727 ( )
R^2/D10^2 : 3.96136E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 582.58 using 59 PHA bins.
# Reduced chi-squared = 10.221 for 57 degrees of freedom
# Null hypothesis probability = 3.535336e-88
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.965e-07 2.729e-08
25- 50 2.887e-06 9.096e-08
50-150 7.814e-06 2.499e-07
15-150 1.130e-05 2.457e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.54467 (-0.0716279 0.0715932)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.80 using 59 PHA bins.
# Reduced chi-squared = 1.8210 for 57 degrees of freedom
# Null hypothesis probability = 1.512704e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.846e-06 4.412e-08
25- 50 3.552e-06 9.305e-08
50-150 7.789e-06 1.945e-07
15-150 1.319e-05 3.116e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.30589 (-0.628269 0.65764)
R1^2/D10^2 : 0.466717 (-0.105639 0.146838)
kT2 [keV] : 32.8918 (-2.50891 3.14647)
R2^2/D10^2 : 5.14325E-03 (-0.0013632 0.00163657)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.490618e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.422e-06 1.263e-07
25- 50 3.431e-06 1.391e-07
50-150 8.740e-06 4.172e-07
15-150 1.359e-05 4.903e-07
Peak spectrum fit
Power-law model
Time interval is from 121.956 sec. to 122.956 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39167 ( -0.0690208 0.0692248 )
Norm@50keV : 5.59567E-02 ( -0.00219396 0.00219354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.51 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.178929e-01
Photon flux (15-150 keV) in 1 sec: 6.80169 ( -0.279456 0.279927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.41619e-07 ( -2.30843e-08 2.31368e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 121.956 sec. to 122.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.987957 ( -0.310984 0.290168 )
Epeak [keV] : 136.700 ( -37.186 193.765 )
Norm@50keV : 8.64271E-02 ( -0.0227088 0.0334789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9957 for 56 degrees of freedom
# Null hypothesis probability = 4.838326e-01
Photon flux (15-150 keV) in 1 sec: 6.66172 ( -0.29506 0.29595 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.30253e-07 ( -2.4977e-08 2.4825e-08 ) ergs/cm2
Band function
Time interval is from 121.956 sec. to 122.956 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.747117 ( -0.443061 0.664765 )
beta : -1.65012 ( 1.65009 0.194068 )
Epeak [keV] : 94.9804 ( -36.3062 117.049 )
Norm@50keV : 0.117510 ( -0.0475291 0.176224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.32 using 59 PHA bins.
# Reduced chi-squared = 0.9876 for 55 degrees of freedom
# Null hypothesis probability = 5.005733e-01
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] : 16.9446 ( )
R^2/D10^2 : 0.523043 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 159.76 using 59 PHA bins.
# Reduced chi-squared = 2.8028 for 57 degrees of freedom
# Null hypothesis probability = 1.111309e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.061e-08 2.355e-09
25- 50 1.351e-07 6.800e-09
50-150 2.766e-07 1.925e-08
15-150 4.423e-07 2.045e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 28.2827 (-1.1106 1.11042)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.82 using 59 PHA bins.
# Reduced chi-squared = 1.313 for 57 degrees of freedom
# Null hypothesis probability = 5.682759e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.044e-08 2.890e-09
25- 50 1.355e-07 5.800e-09
50-150 2.972e-07 1.305e-08
15-150 5.031e-07 2.055e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.14491 (-1.96975 1.91431)
R1^2/D10^2 : 2.62704 (-1.03215 2.67234)
kT2 [keV] : 31.7084 (-6.69743 13.9352)
R2^2/D10^2 : 4.55444E-02 (-0.0311457 0.0641135)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.33 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 55 degrees of freedom
# Null hypothesis probability = 1.823516e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.004e-08 7.485e-09
25- 50 1.376e-07 1.555e-08
50-150 3.403e-07 8.110e-08
15-150 5.279e-07 8.925e-08
Plot creation:
Tue May 13 09:20:22 EDT 2014