batgrbproduct analysis for trigger=743065
batgrbproduct Analysis for Trigger=743065
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 09:18:49 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger743065/GCN5_download_cron
======================================================================
Trigger: 00743065 Segment: 000
BAT Trigger Time: 511531935.296 [s; MET]
Trigger Stop: 511531939.392 [s; MET]
UTC: 2017-03-18T12:11:56.523500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 305.64484692759 Dec: 28.4088371264311 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.17
Image Trigger?: NO
Rate S/N Ratio: 16.4924225024706 [ if not an image trigger ]
Image S/N Ratio: 12.17
Flight Position: [ source = BAT ]
RA: 305.64484692759 Dec: 28.4088371264311 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 305.66220732693 Dec: 28.4084927273236 [deg; J2000]
{ 20h 22m 38.9s , +28d 24' 30.6" }
+/- 1.22523320655006 [arcmin] (estimated 90% radius based on SNR)
+/- 0.39961787507286 [arcmin] (formal 1-sigma fit error)
SNR: 22.7557724293704
Angular difference between Flight and Ground position is 0.916421 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 494.735999941826 +/- 26.7696569381307
Measured from: -1.43599987030029
to: 493.300000071526 [s; relative to TRIGTIME]
T50: 320.663999974728 +/- 34.2101719201186
Measured from: 15.6920000910759
to: 336.356000065804 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.87199997901917
to: 2.87199997901917 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.5440000295639
to: 535.311999976635 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.913196 2.002972 1.535708 0.566667
0.171031 0.177252 0.156029 0.144250 [error]
Peak 0.030196 0.032216 0.081263 0.038834
0.010730 0.011622 0.010791 0.008839 [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 3.86e-07 7.88e-07 1.26e-06 4.45e-06 3.49e-06 6.88e-06 erg/cm2
Error 7.28e-08 9.07e-08 1.52e-07 1.18e-06 3.83e-07 1.28e-06 erg/cm2
Peak flux Power-law 2.26e-01 3.45e-01 3.95e-01 8.65e-01 1.22e+00 1.83e+00 ph/cm2/s
Error 1.13e-01 1.08e-01 8.10e-02 3.80e-01 2.79e-01 4.05e-01 ph/cm2/s
Fluence Cutoff-PL 3.30e-07 8.56e-07 1.33e-06 1.47e-06 3.27e-06 3.99e-06 erg/cm2
Error 8.90e-08 1.16e-07 1.75e-07 1.77e-06 4.43e-07 1.80e-06 erg/cm2
Peak flux Cutoff-PL 9.64e-02 3.04e-01 4.82e-01 3.37e-01 1.10e+00 1.22e+00 ph/cm2/s
Error 1.41e-01 1.60e-01 1.35e-01 -------- 3.16e-01 6.12e-01 ph/cm2/s
Fluence Band 3.00e-07 8.94e-07 1.27e-06 2.80e-06 3.30e-06 5.28e-06 erg/cm2
Error 9.76e-08 1.34e-07 -------- -------- 4.24e-07 -------- erg/cm2
Peak flux Band 1.44e-01 3.25e-01 4.51e-01 4.81e-01 1.16e+00 1.42e+00 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 1.328 0.173 - - 6.39e-04 6.50e-05 65.970 57
CPL 0.464 0.924 90.6 255.7 1.71e-03 2.34e-03 62.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.804 0.375 - - 1.06e-02 2.50e-03 84.010 57
CPL -1.177 3.882 112.0 -40.1 5.05e-02 1.02e+00 81.880 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: 488.192000 sec.
T50 in the 50-300 keV band: 335.936000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 556.856 -21.544 535.312
T90 494.736 -1.436 493.300
T50 320.664 15.692 336.356
Peak 1.000 1.872 2.872
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
305.6622 +28.4085 0.0085 39.0 -144.8 4.0180 22.8 TRIG_00743065
------------------------------------------
Foreground time interval of the image:
-21.544 34.605 (delta_t = 56.149 [sec])
Background time interval of the image:
-239.296 -21.544 (delta_t = 217.752 [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
Multiple GTIs in the spectrum
tstart tstop
-21.544000 155.944000
156.704000 535.312000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32808 ( -0.174037 0.17127 )
Norm@50keV : 6.38508E-04 ( -6.49886e-05 6.49873e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.97 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 57 degrees of freedom
# Null hypothesis probability = 1.945464e-01
Photon flux (15-150 keV) in 556.1 sec: 7.65839E-02 ( -0.00816306 0.00819142 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48536e-06 ( -3.81609e-07 3.83958e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-21.544000 155.944000
156.704000 535.312000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.463902 ( -1.03012 0.817587 )
Epeak [keV] : 90.6234 ( -25.0808 486.363 )
Norm@50keV : 1.70954E-03 ( -0.00102443 0.00366545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.73 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 56 degrees of freedom
# Null hypothesis probability = 2.499911e-01
Photon flux (15-150 keV) in 556.1 sec: 7.37873E-02 ( -0.0086903 0.0086497 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27088e-06 ( -4.44696e-07 4.41415e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-21.544000 155.944000
156.704000 535.312000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.20738E-02 ( -1.04197 -0.0324306 )
beta : -1.88926 ( 1.8836 0.529746 )
Epeak [keV] : 70.5592 ( -37.7168 82.1573 )
Norm@50keV : 3.14479E-03 ( -0.00344229 3.97941 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.77 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 55 degrees of freedom
# Null hypothesis probability = 2.759903e-01
Photon flux (15-150 keV) in 556.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30479e-06 ( -3.30089e-06 -4.32796e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.2213 (-1.77904 2.10394)
R^2/D10^2 : 7.01705E-03 (-0.00245295 0.00355381)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.039202e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.116e-07 4.279e-08
25- 50 9.010e-07 1.404e-07
50-150 1.666e-06 2.997e-07
15-150 2.778e-06 3.406e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-38.3828 -200)
Norm : 0.321563 (-0.0329025 0.0329025)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.69 using 59 PHA bins.
# Reduced chi-squared = 1.205 for 57 degrees of freedom
# Null hypothesis probability = 1.380738e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.453e-07 8.080e-08
25- 50 8.565e-07 4.650e-07
50-150 1.878e-06 1.028e-06
15-150 3.180e-06 1.414e-06
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.8437 (-2.01828 2.2297)
R1^2/D10^2 : 1.34409E-02 (-0.00630312 0.00947808)
kT2 [keV] : 200.000 (-164.778 -200)
R2^2/D10^2 : 8.01557E-06 (-3.44977e-06 2.69401e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.42 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.510442e-01
# Null hypothesis probability = 3.701601e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.728e-07 8.920e-08
25- 50 9.369e-07 3.087e-07
50-150 2.132e-06 9.921e-07
15-150 3.341e-06 1.250e-06
Peak spectrum fit
Power-law model
Time interval is from 1.872 sec. to 2.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.803991 ( -0.393508 0.356399 )
Norm@50keV : 1.06418E-02 ( -0.00254463 0.00245331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.01 using 59 PHA bins.
# Reduced chi-squared = 1.474 for 57 degrees of freedom
# Null hypothesis probability = 1.147571e-02
Photon flux (15-150 keV) in 1 sec: 1.22288 ( -0.275855 0.28129 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24149e-07 ( -2.58249e-08 2.58759e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.872 sec. to 2.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.17663 ( -5.6616 2.10173 )
Epeak [keV] : 111.985 ( -31.5381 -111.828 )
Norm@50keV : 5.05046E-02 ( -0.0508805 1.99471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.88 using 59 PHA bins.
# Reduced chi-squared = 1.462 for 56 degrees of freedom
# Null hypothesis probability = 1.367150e-02
Photon flux (15-150 keV) in 1 sec: 1.10173 ( -0.314283 0.31864 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20212e-07 ( -2.87452e-08 2.7206e-08 ) ergs/cm2
Band function
Time interval is from 1.872 sec. to 2.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.893728 ( 0.893712 0.893712 )
beta : -0.804028 ( -0.356076 0.39416 )
Epeak [keV] : 13.6078 ( -13.6076 -13.6076 )
Norm@50keV : 1.58652E-02 ( -0.00771684 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.01 using 59 PHA bins.
# Reduced chi-squared = 1.528 for 55 degrees of freedom
# Null hypothesis probability = 7.116331e-03
Photon flux (15-150 keV) in 1 sec: 1.16398 ( ) 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] : 27.4289 (-5.69767 8.90623)
R^2/D10^2 : 2.44599E-02 (-0.0139439 0.0262216)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.74 using 59 PHA bins.
# Reduced chi-squared = 1.434 for 57 degrees of freedom
# Null hypothesis probability = 1.752654e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.037e-09 1.390e-09
25- 50 1.802e-08 7.684e-09
50-150 9.863e-08 4.043e-08
15-150 1.197e-07 4.287e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-48.7434 -200)
Norm : 5.20189 (-1.18016 1.18016)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.10 using 59 PHA bins.
# Reduced chi-squared = 1.686 for 57 degrees of freedom
# Null hypothesis probability = 9.235876e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.297e-08 7.695e-09
25- 50 2.494e-08 1.450e-08
50-150 5.471e-08 3.189e-08
15-150 9.262e-08 5.565e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.91079 (-27.3943 -27.3943)
R1^2/D10^2 : 29.9736 (-31.3607 -31.3607)
kT2 [keV] : 28.7033 (-6.25823 10.5591)
R2^2/D10^2 : 2.09180E-02 (-0.0209406 0.0146363)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.74 using 59 PHA bins.
#Fit statistic : Chi-Squared = 80.07 using 59 PHA bins.
# Reduced chi-squared = 1.486 for 55 degrees of freedom
# Reduced chi-squared = 1.456 for 55 degrees of freedom
# Null hypothesis probability = 1.113188e-02
# Null hypothesis probability = 1.528173e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.037e-09 1.978e-05
25- 50 1.803e-08 1.767e-04
50-150 9.916e-08 4.125e-03
15-150 1.202e-07 4.735e-03
Plot creation:
Sun Mar 19 09:36:29 EDT 2017