batgrbproduct analysis for trigger=750044
batgrbproduct Analysis for Trigger=750044
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): Thu Apr 27 13:34:30 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger750044/GCN5_download_cron
======================================================================
Trigger: 00750044 Segment: 000
BAT Trigger Time: 514906920 [s; MET]
Trigger Stop: 514906984 [s; MET]
UTC: 2017-04-26T13:41:41.031720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 255.043891882312 Dec: -60.1119294489334 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6
Flight Position: [ source = BAT ]
RA: 255.043891882312 Dec: -60.1119294489334 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 255.094430340908 Dec: -60.098254693331 [deg; J2000]
{ 17h 00m 22.7s , -60d 05' 53.7" }
+/- 3.28525865822221 [arcmin] (estimated 90% radius based on SNR)
+/- 1.51084777476363 [arcmin] (formal 1-sigma fit error)
SNR: 5.56111471084152
Angular difference between Flight and Ground position is 1.719688 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.238514 0.150179 0.016136 0.039710
0.050751 0.047097 0.039575 0.034326 [error]
Peak 0.238514 0.150179 0.016136 0.039710
0.050751 0.047097 0.039575 0.034326 [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 5.78e-08 6.28e-08 4.86e-08 6.16e-08 1.92e-07 2.31e-07 erg/cm2
Error 2.18e-08 2.24e-08 3.42e-08 9.62e-08 7.88e-08 1.37e-07 erg/cm2
Peak flux Power-law 2.97e-02 1.79e-02 6.94e-03 3.59e-03 5.64e-02 5.81e-02 ph/cm2/s
Error 1.15e-02 6.18e-03 4.71e-03 5.19e-03 1.71e-02 1.80e-02 ph/cm2/s
Fluence Cutoff-PL 5.78e-08 6.29e-08 4.90e-08 6.22e-08 1.93e-07 2.27e-07 erg/cm2
Error 2.18e-08 2.60e-08 4.32e-08 6.27e-08 8.39e-08 1.58e-07 erg/cm2
Peak flux Cutoff-PL 3.00e-02 1.78e-02 6.76e-03 3.37e-03 5.64e-02 5.80e-02 ph/cm2/s
Error -------- -------- -------- -------- -------- 1.39e-02 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 2.371 0.737 - - 3.10e-04 2.34e-04 51.530 57
CPL 1.785 0.000 25.4 0.0 5.62e-04 0.00e+00 52.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.371 0.737 - - 3.10e-04 2.34e-04 51.530 57
CPL 1.785 0.000 25.4 0.0 5.62e-04 0.00e+00 52.180 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
255.0944 -60.0983 0.0347 11.3 -81.0 0.5690 5.6 TRIG_00750044
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.37113 ( -0.63961 0.834696 )
Norm@50keV : 3.10108E-04 ( -0.000310108 0.000157844 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9040 for 57 degrees of freedom
# Null hypothesis probability = 6.796644e-01
Photon flux (15-150 keV) in 64 sec: 5.64230E-02 ( -0.0170755 0.0170902 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9237e-07 ( -7.432e-08 8.33696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78462 ( )
Epeak [keV] : 25.3581 ( )
Norm@50keV : 5.62100E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 56 degrees of freedom
# Null hypothesis probability = 6.203195e-01
Photon flux (15-150 keV) in 64 sec: 5.63636E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92632e-07 ( -8.40608e-08 8.37568e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.953731 ( 1.58963 1.58963 )
beta : -2.44092 ( 2.40081 0.667805 )
Epeak [keV] : 17.9327 ( -11.6607 -11.6607 )
Norm@50keV : 0.184095 ( -0.189529 223.486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9359 for 55 degrees of freedom
# Null hypothesis probability = 6.101747e-01
Photon flux (15-150 keV) in 64 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] : 7.40630 (-2.78325 3.44742)
R^2/D10^2 : 8.25391E-02 (-0.081866 0.513002)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.917e-08 2.959e-08
25- 50 7.494e-08 4.621e-08
50-150 1.517e-08 1.303e-08
15-150 1.393e-07 8.502e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.2760 (-19.1198 75.755)
Norm : 0.403604 (-0.197444 0.511364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9132 for 57 degrees of freedom
# Null hypothesis probability = 6.608120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.594e-08 3.053e-08
25- 50 6.853e-08 3.957e-08
50-150 4.439e-08 3.376e-08
15-150 1.689e-07 1.002e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.28703 (-2.89605 -3.26148)
R1^2/D10^2 : 1.89909 (-1.89439 -1.9266)
kT2 [keV] : 11.2780 (-11.2442 -11.2445)
R2^2/D10^2 : 1.13619E-02 (-0.0112969 0.122607)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9369 for 55 degrees of freedom
# Null hypothesis probability = 6.080656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.863e-08 2.978e-08
25- 50 6.444e-08 3.715e-08
50-150 4.151e-08 3.063e-08
15-150 1.646e-07 8.720e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.37113 ( -0.63961 0.834696 )
Norm@50keV : 3.10108E-04 ( -0.000310108 0.000157844 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9040 for 57 degrees of freedom
# Null hypothesis probability = 6.796644e-01
Photon flux (15-150 keV) in 64 sec: 5.64230E-02 ( -0.0170755 0.0170902 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9237e-07 ( -7.432e-08 8.33696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78462 ( )
Epeak [keV] : 25.3581 ( )
Norm@50keV : 5.62100E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 56 degrees of freedom
# Null hypothesis probability = 6.203195e-01
Photon flux (15-150 keV) in 64 sec: 5.63636E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92632e-07 ( -8.40608e-08 8.37568e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.953731 ( 1.58963 1.58963 )
beta : -2.44092 ( 2.40081 0.667805 )
Epeak [keV] : 17.9327 ( -11.6607 -11.6607 )
Norm@50keV : 0.184095 ( -0.189529 223.486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9359 for 55 degrees of freedom
# Null hypothesis probability = 6.101747e-01
Photon flux (15-150 keV) in 64 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] : 7.40630 (-2.78325 3.44742)
R^2/D10^2 : 8.25391E-02 (-0.081866 0.513002)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.917e-08 3.017e-08
25- 50 7.494e-08 4.714e-08
50-150 1.517e-08 1.249e-08
15-150 1.393e-07 8.342e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.2760 (-19.1198 75.755)
Norm : 0.403604 (-0.197444 0.511364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9132 for 57 degrees of freedom
# Null hypothesis probability = 6.608120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.594e-08 3.251e-08
25- 50 6.853e-08 4.325e-08
50-150 4.439e-08 3.692e-08
15-150 1.689e-07 1.011e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.28703 (-3.04557 -3.26148)
R1^2/D10^2 : 1.89909 (-1.89439 -1.9266)
kT2 [keV] : 11.2780 (-11.244 -11.2445)
R2^2/D10^2 : 1.13619E-02 (-0.0112969 0.122607)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9369 for 55 degrees of freedom
# Null hypothesis probability = 6.080656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.863e-08 2.919e-08
25- 50 6.444e-08 3.683e-08
50-150 4.151e-08 2.724e-08
15-150 1.646e-07 8.570e-08
Plot creation:
Thu Apr 27 13:45:38 EDT 2017