batgrbproduct Analysis for Trigger=728094
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Dec 24 11:11:22 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger728094/GCN5_download_cron
======================================================================
Trigger: 00728094 Segment: 000
BAT Trigger Time: 504212504 [s; MET]
Trigger Stop: 504213000 [s; MET]
UTC: 2016-12-23T19:01:26.648440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 259.877380991834 Dec: -25.0103709585701 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.65
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.65
Flight Position: [ source = BAT ]
RA: 259.877380991834 Dec: -25.0103709585701 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 259.877 Dec: -25.0104 [deg; J2000]
{ 17h 19m 30.5s , -25d 00' -37.4" }
+/- 3.23404020631 [arcmin] (estimated 90% radius based on SNR)
SNR: 5.68810313339
Angular difference between Flight and Ground position is 0.020789 arcmin
Partial Coding Fraction: 0.1269531 [ including projection effects ]
Duration
T90: N/A
T50: N/A
======================================================================
=== 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 1.25e-06 2.03e-06 2.50e-06 6.06e-06 7.50e-06 1.19e-05 erg/cm2
Error 2.45e-07 2.48e-07 3.95e-07 2.02e-06 9.54e-07 2.34e-06 erg/cm2
Peak flux Power-law 2.91e-01 1.31e-01 3.53e-02 1.18e-02 4.64e-01 4.70e-01 ph/cm2/s
Error 3.28e-01 1.50e-01 9.48e-02 8.13e-01 4.73e-01 4.82e-01 ph/cm2/s
Fluence Cutoff-PL 1.07e-06 2.22e-06 2.60e-06 1.85e-06 7.02e-06 7.71e-06 erg/cm2
Error 2.96e-07 3.14e-07 4.52e-07 2.40e-06 1.05e-06 2.62e-06 erg/cm2
Peak flux Cutoff-PL -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- 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 1.702 0.204 - - 1.19e-03 1.45e-04 64.780 57
CPL 0.743 1.004 63.7 79.2 3.68e-03 6.70e-03 61.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.858 0.000 - - 1.87e-03 3.10e-03 58.150 57
CPL 2.019 0.000 94.7 0.0 2.87e-03 0.00e+00 58.300 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 N/A N/A N/A
T90 N/A N/A N/A
T50 N/A N/A N/A
Peak N/A N/A N/A
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name
259.877 -25.010 0.000 38.138 -102.885 5.650 5.688 TRIG_00728094
Image time interval: 0.000 244.000 to 243.045 496.000 [sec]
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 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) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-39.000000 243.044700
244.000000 644.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70250 ( -0.202205 0.205927 )
Norm@50keV : 1.18924E-03 ( -0.000145494 0.000144394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.78 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.237737e-01
Photon flux (15-150 keV) in 682 sec: 0.158090 ( -0.019334 0.019423 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.50902e-06 ( -9.49774e-07 9.58462e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-39.000000 243.044700
244.000000 644.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.743440 ( -1.11925 0.888556 )
Epeak [keV] : 63.6961 ( -14.3884 144 )
Norm@50keV : 3.67947E-03 ( -0.00367947 0.00972675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.36 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 56 degrees of freedom
# Null hypothesis probability = 2.900008e-01
Photon flux (15-150 keV) in 682 sec: 0.150575 ( -0.020598 0.020636 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.00462e-06 ( -1.0397e-06 1.06354e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-39.000000 243.044700
244.000000 644.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.731779 ( -0.896546 5.57428 )
beta : -2.90470 ( 2.89086 4.33027 )
Epeak [keV] : 63.2849 ( -29.7462 129.99 )
Norm@50keV : 3.73722E-03 ( -0.00382153 1.37874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.33 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.594138e-01
Photon flux (15-150 keV) in 682 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] : 13.6138 (-1.70879 1.98621)
R^2/D10^2 : 2.44943E-02 (-0.00973477 0.0157887)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.09 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 57 degrees of freedom
# Null hypothesis probability = 1.142190e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.555e-07 1.664e-07
25- 50 2.370e-06 3.983e-07
50-150 2.850e-06 6.830e-07
15-150 5.875e-06 9.207e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 132.650 (-48.8974 -129.683)
Norm : 0.657237 (-0.0926199 0.123878)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.32 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.925828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.162e-06 1.985e-07
25- 50 2.113e-06 5.603e-07
50-150 3.954e-06 2.188e-06
15-150 7.229e-06 2.919e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.04085 (-3.07794 4.99472)
R1^2/D10^2 : 0.231908 (-0.190051 4.55572)
kT2 [keV] : 18.4947 (-4.35308 26.2996)
R2^2/D10^2 : 6.43187E-03 (-0.00598855 0.0133984)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.62 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 55 degrees of freedom
# Null hypothesis probability = 2.513270e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.072e-06 6.015e-07
25- 50 2.188e-06 1.123e-06
50-150 3.585e-06 1.989e-06
15-150 6.845e-06 3.499e-06
Peak spectrum fit
Power-law model
Time interval is from 258.060 sec. to 259.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.85783 ( -2.87593 -2.87593 )
Norm@50keV : 1.86869E-03 ( -0.00183106 0.00436849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.327690e-01
Photon flux (15-150 keV) in 1 sec: 0.464062 ( -0.464062 0.481455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08728e-08 ( 1 3.83529e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 258.060 sec. to 259.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01913 ( )
Epeak [keV] : 94.7285 ( )
Norm@50keV : 2.86681E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 56 degrees of freedom
# Null hypothesis probability = 3.908166e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 258.060 sec. to 259.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.99251 ( 1.65781 1.65781 )
beta : -10.00000 ( 10 10 )
Epeak [keV] : 0.100000 ( -0.1 -0.1 )
Norm@50keV : 2.04829E-02 ( -0.0204829 0.0216284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.27 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 3.560840e-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] : 4.28146 (-4.28133 -4.28133)
R^2/D10^2 : 8.03980 (-8.04142 -8.04142)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.25 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.292444e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.007e-08 6.845e-09
25- 50 4.395e-09 3.948e-09
50-150 7.945e-11 1.009e-10
15-150 1.454e-08 1.118e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5940 (-11.594 -11.594)
Norm : 11.4075 (-11.4075 -11.4075)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.293880e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.762e-09 7.185e-09
25- 50 5.069e-09 4.299e-09
50-150 5.087e-10 7.410e-10
15-150 1.534e-08 1.228e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.86368 (-3.86995 -3.86995)
R1^2/D10^2 : 12.7866 (-12.704 4858.48)
kT2 [keV] : 62.2984 (-64.7732 -64.7732)
R2^2/D10^2 : 5.61072E-04 (-0.000527583 0.0091523)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.86 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.057760e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.001e-08 6.735e-09
25- 50 4.709e-09 3.041e-09
50-150 2.230e-08 1.313e-08
15-150 3.702e-08 1.840e-08
Plot creation:
Sat Dec 24 15:01:37 EST 2016