batgrbproduct Analysis for Trigger=617149
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 Nov 1 03:39:32 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger617149/GCN5_download_cron
======================================================================
Trigger: 00617149 Segment: 000
BAT Trigger Time: 436460217.792 [s; MET]
Trigger Stop: 436460225.984 [s; MET]
UTC: 2014-10-31T14:56:45.065320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 356.931700786733 Dec: 41.3655291034627 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.44
Image Trigger?: NO
Rate S/N Ratio: 8.94427190999916 [ if not an image trigger ]
Image S/N Ratio: 7.44
Flight Position: [ source = BAT ]
RA: 356.931700786733 Dec: 41.3655291034627 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 356.882859439076 Dec: 41.355294913241 [deg; J2000]
{ 23h 47m 31.9s , +41d 21' 19.1" }
+/- 2.21942263432925 [arcmin] (estimated 90% radius based on SNR)
+/- 0.898987403006968 [arcmin] (formal 1-sigma fit error)
SNR: 9.73844897620899
Angular difference between Flight and Ground position is 2.283630 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 16 +/- 3.60555127546399
Measured from: 1.20800012350082
to: 17.2080001235008 [s; relative to TRIGTIME]
T50: 9 +/- 4.47213595499958
Measured from: 4.20800012350082
to: 13.2080001235008 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.20800000429153
to: 5.20800000429153 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.20800000429153
to: 18.2080000042915 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.116985 0.113627 0.112450 0.060711
0.022560 0.023246 0.020339 0.017514 [error]
Peak 0.017074 0.011853 0.007756 0.013905
0.005493 0.005692 0.004992 0.004109 [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 2.85e-08 5.71e-08 8.91e-08 3.07e-07 2.48e-07 4.81e-07 erg/cm2
Error 9.42e-09 1.05e-08 2.08e-08 1.72e-07 4.99e-08 1.84e-07 erg/cm2
Peak flux Power-law 1.20e-01 1.12e-01 7.24e-02 7.22e-02 3.34e-01 3.77e-01 ph/cm2/s
Error 1.00e-01 4.36e-02 5.75e-02 1.06e-01 1.26e-01 1.51e-01 ph/cm2/s
Fluence Cutoff-PL 2.92e-08 5.75e-08 8.78e-08 2.90e-07 2.46e-07 4.64e-07 erg/cm2
Error 9.40e-09 1.05e-08 2.06e-08 1.83e-07 4.77e-08 1.87e-07 erg/cm2
Peak flux Cutoff-PL 1.23e-01 1.12e-01 7.07e-02 6.76e-02 3.34e-01 3.73e-01 ph/cm2/s
Error 7.51e-02 4.24e-02 5.75e-02 1.12e-01 1.26e-01 1.47e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.357 0.352 - - 1.50e-03 2.57e-04 56.280 57
CPL 2.461 0.000 153.3 0.0 4.16e-04 0.00e+00 52.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.628 0.885 - - 2.58e-03 1.18e-03 56.270 57
CPL 3.971 0.000 459.6 0.0 2.00e-04 0.00e+00 55.010 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: 7.936000 sec.
T50 in the 50-300 keV band: 4.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 17.000 1.208 18.208
T90 16.000 1.208 17.208
T50 9.000 4.208 13.208
Peak 1.000 4.208 5.208
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
356.8829 +41.3553 0.0198 12.1 -7.8 0.4043 9.7 TRIG_00617149
------------------------------------------
Foreground time interval of the image:
1.208 18.208 (delta_t = 17.000 [sec])
Background time interval of the image:
-239.792 1.208 (delta_t = 241.000 [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 1.208 sec. to 18.208 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35719 ( -0.353972 0.350043 )
Norm@50keV : 1.49855E-03 ( -0.000258466 0.000255211 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 0.9874 for 57 degrees of freedom
# Null hypothesis probability = 5.020767e-01
Photon flux (15-150 keV) in 17 sec: 0.180799 ( -0.0309972 0.0310266 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48419e-07 ( -4.94542e-08 5.02777e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.208 sec. to 18.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46136 ( )
Epeak [keV] : 153.258 ( )
Norm@50keV : 4.16428E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9421 for 56 degrees of freedom
# Null hypothesis probability = 5.984269e-01
Photon flux (15-150 keV) in 17 sec: 0.181359 ( -0.031333 0.030513 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45925e-07 ( -4.79366e-08 4.74674e-08 ) ergs/cm2
Band function
Time interval is from 1.208 sec. to 18.208 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09269 ( 1.09344 1.09344 )
beta : -1.35666 ( 1.35701 0.353872 )
Epeak [keV] : 39.4123 ( -38.862 -38.862 )
Norm@50keV : 2.87843E-03 ( -0.00163386 0.235484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.267852e-01
Photon flux (15-150 keV) in 17 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] : 17.4517 (-5.3188 9.40188)
R^2/D10^2 : 1.15497E-02 (-0.0112679 0.0276054)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.73 using 59 PHA bins.
# Reduced chi-squared = 1.346 for 57 degrees of freedom
# Null hypothesis probability = 4.178050e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.209e-08 5.209e-09
25- 50 5.460e-08 1.969e-08
50-150 1.197e-07 4.422e-08
15-150 1.864e-07 5.500e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.736132 (-0.125273 0.125266)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.28 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.923450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.117e-08 1.819e-08
25- 50 5.996e-08 3.441e-08
50-150 1.315e-07 7.447e-08
15-150 2.226e-07 1.255e-07
Double BB
#Fit statistic : Chi-Squared = 53.76 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9994 for 55 degrees of freedom
# Reduced chi-squared = 0.9783 for 55 degrees of freedom
# Reduced chi-squared = 0.9774 for 55 degrees of freedom
# Reduced chi-squared = 0.9650 for 55 degrees of freedom
# Reduced chi-squared = 0.9634 for 55 degrees of freedom
# Null hypothesis probability = 4.759134e-01
# Null hypothesis probability = 5.203949e-01
# Null hypothesis probability = 5.222135e-01
# Null hypothesis probability = 5.485700e-01
# Null hypothesis probability = 5.519372e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.303e-08 2.161e-08
25- 50 4.038e-08 2.267e-08
50-150 1.770e-07 1.103e-07
15-150 2.504e-07 1.429e-07
Peak spectrum fit
Power-law model
Time interval is from 4.208 sec. to 5.208 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62821 ( -0.826163 0.942866 )
Norm@50keV : 2.57680E-03 ( -0.00127754 0.00108823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 0.9872 for 57 degrees of freedom
# Null hypothesis probability = 5.024109e-01
Photon flux (15-150 keV) in 1 sec: 0.334094 ( -0.126292 0.12622 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40146e-08 ( -1.13501e-08 1.20207e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.208 sec. to 5.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.97072 ( )
Epeak [keV] : 459.618 ( )
Norm@50keV : 2.00166E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9824 for 56 degrees of freedom
# Null hypothesis probability = 5.122034e-01
Photon flux (15-150 keV) in 1 sec: 0.334200 ( -0.126101 0.126042 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36351e-08 ( -1.09769e-08 1.19134e-08 ) ergs/cm2
Band function
Time interval is from 4.208 sec. to 5.208 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31647 ( 1.31662 1.31662 )
beta : -1.62778 ( 1.62866 0.825566 )
Epeak [keV] : 24.3629 ( -24.3838 -24.3838 )
Norm@50keV : 5.62183E-03 ( -0.00562375 2356.03 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.271119e-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] : 11.8492 (-5.62626 13.9349)
R^2/D10^2 : 7.96578E-02 (-0.0787687 0.747733)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.15 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.624529e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.363e-09 1.564e-09
25- 50 7.326e-09 4.650e-09
50-150 6.132e-09 4.592e-09
15-150 1.582e-08 1.087e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 1.33888 (-0.511825 1.07475)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.79 using 59 PHA bins.
# Reduced chi-squared = 0.9964 for 57 degrees of freedom
# Null hypothesis probability = 4.828386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.334e-09 2.161e-09
25- 50 6.413e-09 4.024e-09
50-150 1.407e-08 9.355e-09
15-150 2.381e-08 1.527e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.47 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.15 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.94 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Null hypothesis probability = 4.197474e-01
# Null hypothesis probability = 4.316944e-01
# Null hypothesis probability = 4.323461e-01
# Null hypothesis probability = 4.392426e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.249e-09 2.444e-09
25- 50 4.362e-09 2.616e-09
50-150 1.427e-08 9.855e-09
15-150 2.288e-08 1.319e-08
Plot creation:
Sat Nov 1 03:43:40 EDT 2014