batgrbproduct analysis for trigger=743086
batgrbproduct Analysis for Trigger=743086
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Mar 19 15:23:43 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger743086/GCN5_download_cron
======================================================================
Trigger: 00743086 Segment: 000
BAT Trigger Time: 511543691.328 [s; MET]
Trigger Stop: 511543691.84 [s; MET]
UTC: 2017-03-18T15:27:52.554820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 284.279322271095 Dec: 6.26950020290672 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.21
Image Trigger?: NO
Rate S/N Ratio: 14.9331845230681 [ if not an image trigger ]
Image S/N Ratio: 7.21
Flight Position: [ source = BAT ]
RA: 284.279322271095 Dec: 6.26950020290672 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 284.228876083797 Dec: 6.33457241535245 [deg; J2000]
{ 18h 56m 54.9s , +06d 20' 04.5" }
+/- 3.72547982618735 [arcmin] (estimated 90% radius based on SNR)
+/- 2.15459452283514 [arcmin] (formal 1-sigma fit error)
SNR: 4.64669091855776
Angular difference between Flight and Ground position is 4.928972 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 160 +/- 35.7770876399966
Measured from: -15.3279998898506
to: 144.672000110149 [s; relative to TRIGTIME]
T50: 112 +/- 57.6888204074238
Measured from: 0.672000110149384
to: 112.672000110149 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -7.82800000905991
to: -6.82800000905991 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.3280000090599
to: 160.67199999094 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.358499 0.398031 0.191294 0.131153
0.092114 0.093642 0.081514 0.073220 [error]
Peak 0.001408 0.014935 -0.003112 0.008401
0.007738 0.008145 0.007108 0.006339 [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 1.05e-07 1.57e-07 1.76e-07 3.72e-07 5.51e-07 8.10e-07 erg/cm2
Error 4.43e-08 4.30e-08 8.49e-08 3.96e-07 1.92e-07 4.75e-07 erg/cm2
Peak flux Power-law 6.53e-02 3.36e-02 1.07e-02 4.34e-03 1.12e-01 1.14e-01 ph/cm2/s
Error 8.99e-02 4.79e-02 2.90e-02 1.21e-01 1.50e-01 1.56e-01 ph/cm2/s
Fluence Cutoff-PL 1.07e-07 1.57e-07 1.72e-07 3.48e-07 5.44e-07 7.84e-07 erg/cm2
Error 4.14e-08 4.32e-08 8.02e-08 4.48e-07 1.93e-07 4.75e-07 erg/cm2
Peak flux Cutoff-PL 8.90e-02 1.11e-01 1.59e-03 1.71e-09 2.01e-01 1.99e-01 ph/cm2/s
Error 9.21e-02 9.43e-02 7.46e-03 9.14e-05 1.57e-01 1.58e-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 1.840 0.594 - - 3.40e-04 1.18e-04 67.870 57
CPL 1.847 0.596 9999.3 0.0 3.39e-04 0.00e+00 67.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.655 0.000 - - 5.17e-04 1.01e-03 62.200 57
CPL -10.000 -2.511 29.5 7.3 2.81e+05 2.72e+06 58.660 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: 1.088000 sec.
T50 in the 50-300 keV band: 0.576000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 176.000 -15.328 160.672
T90 160.000 -15.328 144.672
T50 112.000 0.672 112.672
Peak 1.000 -7.828 -6.828
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
284.2289 +6.3346 0.0414 30.0 26.1 0.3556 4.6 TRIG_00743086
------------------------------------------
Foreground time interval of the image:
-15.328 9.073 (delta_t = 24.401 [sec])
Background time interval of the image:
-239.328 -15.328 (delta_t = 224.000 [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 -15.328 sec. to 160.672 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84013 ( -0.560301 0.627048 )
Norm@50keV : 3.40303E-04 ( -0.000124125 0.00011248 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.87 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.535927e-01
Photon flux (15-150 keV) in 176 sec: 4.76426E-02 ( -0.0130242 0.0130267 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.5078e-07 ( -1.86354e-07 1.96844e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.328 sec. to 160.672 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84732 ( -0.56964 0.622652 )
Epeak [keV] : 9999.27 ( )
Norm@50keV : 3.39499E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.87 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 56 degrees of freedom
# Null hypothesis probability = 1.328623e-01
Photon flux (15-150 keV) in 176 sec: 4.76422E-02 ( -0.0130054 0.0130006 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.44181e-07 ( -1.8027e-07 2.05605e-07 ) ergs/cm2
Band function
Time interval is from -15.328 sec. to 160.672 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51071 ( 1.51073 1.51073 )
beta : -1.84005 ( 1.84013 0.560252 )
Epeak [keV] : 11.5733 ( -11.5768 -11.5768 )
Norm@50keV : 8.72639E-04 ( -0.000872666 0.00859942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.87 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 55 degrees of freedom
# Null hypothesis probability = 1.141040e-01
Photon flux (15-150 keV) in 176 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] : 9.25717 (-2.92797 4.65059)
R^2/D10^2 : 2.85861E-02 (-0.0284905 0.09569)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.37 using 59 PHA bins.
# Reduced chi-squared = 1.287 for 57 degrees of freedom
# Null hypothesis probability = 7.107639e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.512e-08 5.156e-08
25- 50 1.890e-07 1.145e-07
50-150 7.852e-08 5.515e-08
15-150 3.526e-07 2.248e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.3258 (-98.6683 -98.6683)
Norm : 0.207808 (-0.069259 0.125578)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.02 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.320116e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.559e-08 5.870e-08
25- 50 1.647e-07 9.909e-08
50-150 2.644e-07 2.050e-07
15-150 5.247e-07 3.589e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.15341 (-2.05825 2.36814)
R1^2/D10^2 : 6.89279E-02 (-0.0485737 0.0800305)
kT2 [keV] : 198.529 (-198.616 -198.616)
R2^2/D10^2 : 7.98136E-06 (-4.2575e-06 0.000222753)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.19 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.634853e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.037e-07 6.382e-08
25- 50 1.607e-07 9.513e-08
50-150 3.960e-07 8.862e-08
15-150 6.604e-07 2.424e-07
Peak spectrum fit
Power-law model
Time interval is from -7.828 sec. to -6.828 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.65461 ( -2.65165 -2.65165 )
Norm@50keV : 5.17084E-04 ( -0.000517578 0.00149978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.20 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.964335e-01
Photon flux (15-150 keV) in 1 sec: 0.111978 ( -0.111979 0.188879 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.48129e-09 ( -5.35587e-09 1.33981e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.828 sec. to -6.828 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99973 ( 9.99996 4.97876 )
Epeak [keV] : 29.5198 ( -7.17363 7.49372 )
Norm@50keV : 2.81456E+05 ( -287923 5.1421e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 56 degrees of freedom
# Null hypothesis probability = 3.781335e-01
Photon flux (15-150 keV) in 1 sec: 0.201010 0.201401 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86732e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from -7.828 sec. to -6.828 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -9.36012 ( 9.37152 19.3545 )
Epeak [keV] : 27.8268 ( -11.5206 15.8123 )
Norm@50keV : 149.704 ( -146.102 5617.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.04 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.981430e-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] : 6.53761 (-6.53761 -6.53761)
R^2/D10^2 : 0.441362 (-0.441373 -0.441373)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.340959e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.807e-09 2.214e-09
25- 50 3.355e-09 3.002e-09
50-150 4.314e-10 6.245e-10
15-150 6.593e-09 6.440e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.2742 (-21.8287 -21.8287)
Norm : 1.43611 (-1.42585 -1.42585)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.068349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.343e-09 1.748e-09
25- 50 2.149e-09 2.497e-09
50-150 7.127e-10 1.289e-09
15-150 5.205e-09 5.160e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53838 (-6.53838 -6.53838)
R1^2/D10^2 : 0.441146 (-0.441165 -0.441165)
kT2 [keV] : 8.86677E-02 (-0.0886677 -0.0886677)
R2^2/D10^2 : 6.15831E-04 (-0.000615858 -0.000615858)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.689970e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Mar 19 15:47:27 EDT 2017