batgrbproduct analysis for trigger=741569
batgrbproduct Analysis for Trigger=741569
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): Wed Mar 8 21:08:04 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger741569/GCN5_download_cron
======================================================================
Trigger: 00741569 Segment: 000
BAT Trigger Time: 510637488 [s; MET]
Trigger Stop: 510637552 [s; MET]
UTC: 2017-03-08T03:44:29.279320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 260.069099596068 Dec: -24.8410041548402 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 13.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.51
Flight Position: [ source = BAT ]
RA: 260.069099596068 Dec: -24.8410041548402 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 260.071299291252 Dec: -24.8549149837974 [deg; J2000]
{ 17h 20m 17.1s , -24d 51' 17.7" }
+/- 1.70883762294637 [arcmin] (estimated 90% radius based on SNR)
+/- 0.816367779060315 [arcmin] (formal 1-sigma fit error)
SNR: 14.1477921143852
Angular difference between Flight and Ground position is 0.843198 arcmin
Partial Coding Fraction: 0.8515625 [ 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 0.482167 0.669437 0.396170 0.036224
0.060167 0.054927 0.044759 0.036826 [error]
Peak 0.482167 0.669437 0.396170 0.036224
0.060167 0.054927 0.044759 0.036826 [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 1.54e-07 2.46e-07 2.97e-07 7.00e-07 8.99e-07 1.40e-06 erg/cm2
Error 2.37e-08 2.47e-08 4.25e-08 2.04e-07 1.01e-07 2.44e-07 erg/cm2
Peak flux Power-law 7.92e-02 6.96e-02 4.20e-02 3.82e-02 2.07e-01 2.29e-01 ph/cm2/s
Error 1.24e-02 7.05e-03 5.80e-03 1.03e-02 2.09e-02 2.28e-02 ph/cm2/s
Fluence Cutoff-PL 1.36e-07 2.78e-07 2.94e-07 1.58e-07 8.14e-07 8.66e-07 erg/cm2
Error 2.70e-08 3.32e-08 5.08e-08 1.71e-07 1.12e-07 2.04e-07 erg/cm2
Peak flux Cutoff-PL 6.90e-02 7.78e-02 4.26e-02 1.15e-02 1.98e-01 2.01e-01 ph/cm2/s
Error 1.42e-02 9.21e-03 6.84e-03 1.02e-02 2.16e-02 2.36e-02 ph/cm2/s
Fluence Band 1.35e-07 2.77e-07 2.93e-07 1.99e-07 8.14e-07 9.05e-07 erg/cm2
Error 3.06e-08 3.68e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- 2.21e-02 -------- 2.40e-01 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 1.730 0.171 - - 1.54e-03 1.66e-04 54.720 57
CPL 0.652 0.811 55.5 19.4 6.05e-03 8.06e-03 47.980 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.730 0.171 - - 1.54e-03 1.66e-04 54.720 57
CPL 0.652 0.811 55.5 19.4 6.05e-03 8.06e-03 47.980 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
260.0713 -24.8549 0.0137 16.8 -62.0 1.5983 14.1 TRIG_00741569
------------------------------------------
Foreground time interval of the image:
0.000 3.070 (delta_t = 3.070 [sec])
4.000 64.000 (delta_t = 60.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.070200
4.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73023 ( -0.168936 0.172317 )
Norm@50keV : 1.54294E-03 ( -0.000167334 0.000165659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.72 using 59 PHA bins.
# Reduced chi-squared = 0.9600 for 57 degrees of freedom
# Null hypothesis probability = 5.611258e-01
Photon flux (15-150 keV) in 63.07 sec: 0.207131 ( -0.0208618 0.0208913 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.9905e-07 ( -1.00614e-07 1.01999e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.070200
4.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.651555 ( -0.886626 0.736152 )
Epeak [keV] : 55.5379 ( -10.3042 28.5481 )
Norm@50keV : 6.04611E-03 ( -0.00361882 0.01251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.98 using 59 PHA bins.
# Reduced chi-squared = 0.8568 for 56 degrees of freedom
# Null hypothesis probability = 7.684319e-01
Photon flux (15-150 keV) in 63.07 sec: 0.198141 ( -0.021586 0.021656 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13862e-07 ( -1.08777e-07 1.14295e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.070200
4.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.54334 ( -5.43322 -4.54334 )
beta : -2.06375 ( -0.288151 0.249528 )
Epeak [keV] : 29.2654 ( -4.03327 4.0603 )
Norm@50keV : 38.5116 ( -3.75277 250.132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8278 for 55 degrees of freedom
# Null hypothesis probability = 8.149774e-01
Photon flux (15-150 keV) in 63.07 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13799e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9891 (-1.3728 1.581)
R^2/D10^2 : 5.10046E-02 (-0.0188599 0.0293882)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.96 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.354094e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.779e-08 1.829e-08
25- 50 3.074e-07 4.043e-08
50-150 2.655e-07 6.619e-08
15-150 6.707e-07 9.338e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 107.722 (-32.6795 62.8197)
Norm : 0.908496 (-0.115508 0.139176)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.90 using 59 PHA bins.
# Reduced chi-squared = 0.8754 for 57 degrees of freedom
# Null hypothesis probability = 7.362301e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.497e-07 2.059e-08
25- 50 2.626e-07 3.078e-08
50-150 4.434e-07 1.875e-07
15-150 8.557e-07 2.040e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.99644 (-1.70287 2.09714)
R1^2/D10^2 : 0.231158 (-0.130687 0.292004)
kT2 [keV] : 20.6840 (-4.94242 11.0104)
R2^2/D10^2 : 4.58564E-03 (-0.00396532 0.0106275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.8220 for 55 degrees of freedom
# Null hypothesis probability = 8.240646e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-07 7.789e-08
25- 50 2.766e-07 1.439e-07
50-150 4.074e-07 2.323e-07
15-150 8.221e-07 4.229e-07
Peak spectrum fit
Power-law model
Time interval is from 4.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73023 ( -0.168936 0.172317 )
Norm@50keV : 1.54294E-03 ( -0.000167334 0.000165659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.72 using 59 PHA bins.
# Reduced chi-squared = 0.9600 for 57 degrees of freedom
# Null hypothesis probability = 5.611258e-01
Photon flux (15-150 keV) in 63.07 sec: 0.207131 ( -0.0208618 0.0208913 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.9905e-07 ( -1.00614e-07 1.01999e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.651555 ( -0.886626 0.736152 )
Epeak [keV] : 55.5379 ( -10.3042 28.5481 )
Norm@50keV : 6.04611E-03 ( -0.00361882 0.01251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.98 using 59 PHA bins.
# Reduced chi-squared = 0.8568 for 56 degrees of freedom
# Null hypothesis probability = 7.684319e-01
Photon flux (15-150 keV) in 63.07 sec: 0.198141 ( -0.021586 0.021656 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13862e-07 ( -1.08777e-07 1.14295e-07 ) ergs/cm2
Band function
Time interval is from 4.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.54334 ( -5.43322 -4.54334 )
beta : -2.06375 ( -0.288151 0.249528 )
Epeak [keV] : 29.2654 ( -4.03327 4.0603 )
Norm@50keV : 38.5116 ( -3.75277 250.132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8278 for 55 degrees of freedom
# Null hypothesis probability = 8.149774e-01
Photon flux (15-150 keV) in 63.07 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13799e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9891 (-1.3728 1.581)
R^2/D10^2 : 5.10046E-02 (-0.0188599 0.0293882)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.96 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.354094e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.779e-08 1.738e-08
25- 50 3.074e-07 4.387e-08
50-150 2.655e-07 6.039e-08
15-150 6.707e-07 8.432e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 107.722 (-32.6795 62.8197)
Norm : 0.908496 (-0.115508 0.139176)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.90 using 59 PHA bins.
# Reduced chi-squared = 0.8754 for 57 degrees of freedom
# Null hypothesis probability = 7.362301e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.497e-07 2.050e-08
25- 50 2.626e-07 3.176e-08
50-150 4.434e-07 1.860e-07
15-150 8.557e-07 2.076e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.99644 (-1.70287 2.09714)
R1^2/D10^2 : 0.231158 (-0.130687 0.292004)
kT2 [keV] : 20.6840 (-4.94242 11.0104)
R2^2/D10^2 : 4.58564E-03 (-0.00396532 0.0106275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.8220 for 55 degrees of freedom
# Null hypothesis probability = 8.240646e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-07 7.625e-08
25- 50 2.766e-07 1.464e-07
50-150 4.074e-07 2.297e-07
15-150 8.221e-07 4.251e-07
Plot creation:
Wed Mar 8 21:25:08 EST 2017