batgrbproduct analysis for trigger=750337
batgrbproduct Analysis for Trigger=750337
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): Sat Apr 29 13:51:25 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger750337/GCN5_download_cron
======================================================================
Trigger: 00750337 Segment: 000
BAT Trigger Time: 515083872 [s; MET]
Trigger Stop: 515083936 [s; MET]
UTC: 2017-04-28T14:50:53.021420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 187.78150086864 Dec: -7.97217563786495 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.8
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.8
Flight Position: [ source = BAT ]
RA: 187.78150086864 Dec: -7.97217563786495 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 187.797927494127 Dec: -7.90330380160509 [deg; J2000]
{ 12h 31m 11.5s , -07d 54' 11.9" }
+/- 4.97671927491411 [arcmin] (estimated 90% radius based on SNR)
+/- 2.68739870738249 [arcmin] (formal 1-sigma fit error)
SNR: 3.07245348930108
Angular difference between Flight and Ground position is 4.246041 arcmin
Partial Coding Fraction: 0.875 [ 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 0.224226 0.100751 -0.044751 -0.077971
0.048813 0.048437 0.043091 0.042648 [error]
Peak 0.224226 0.100751 -0.044751 -0.077971
0.048813 0.048437 0.043091 0.042648 [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 5.55e-08 4.06e-08 1.97e-08 1.37e-08 1.22e-07 1.32e-07 erg/cm2
Error 2.12e-08 2.22e-08 2.36e-08 3.16e-08 6.18e-08 7.79e-08 erg/cm2
Peak flux Power-law 2.89e-02 1.19e-02 2.90e-03 8.64e-04 4.42e-02 4.48e-02 ph/cm2/s
Error 1.12e-02 6.25e-03 3.36e-03 1.82e-03 1.72e-02 1.75e-02 ph/cm2/s
Fluence Cutoff-PL 6.43e-08 4.70e-08 8.70e-10 1.41e-14 1.12e-07 1.12e-07 erg/cm2
Error 2.53e-08 3.31e-08 6.96e-09 2.87e-10 4.31e-08 4.31e-08 erg/cm2
Peak flux Cutoff-PL 3.21e-02 1.48e-02 1.55e-04 1.26e-09 4.70e-02 4.71e-02 ph/cm2/s
Error 1.30e-02 9.61e-03 1.11e-03 2.47e-05 1.59e-02 1.59e-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 3.054 0.920 - - 1.54e-04 1.51e-04 62.540 57
CPL 1.000 0.000 50.0 0.0 8.35e-04 0.00e+00 69.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.054 0.920 - - 1.54e-04 1.51e-04 62.540 57
CPL 1.000 0.000 50.0 0.0 8.35e-04 0.00e+00 69.790 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
187.7979 -7.9033 0.0626 21.3 -37.5 0.3300 3.1 TRIG_00750337
------------------------------------------
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: 3.05373 ( -0.757176 1.08341 )
Norm@50keV : 1.54301E-04 ( -0.000155725 0.000145767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.54 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 57 degrees of freedom
# Null hypothesis probability = 2.861485e-01
Photon flux (15-150 keV) in 64 sec: 4.42434E-02 ( -0.0170284 0.0172945 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22269e-07 ( -5.58272e-08 6.77005e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.34667E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.79 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 56 degrees of freedom
# Null hypothesis probability = 1.018602e-01
Photon flux (15-150 keV) in 64 sec: 4.70490E-02 ( -0.0158731 0.0160073 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12017e-07 ( -4.20531e-08 4.40883e-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 : 4.53765 ( -4.43796 -4.53765 )
beta : -9.98597 ( 9.98597 19.9586 )
Epeak [keV] : 23.3900 ( -5.89457 4.6991 )
Norm@50keV : 54.5176 ( -18.1559 899.184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.77 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.732160e-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] : 5.34262 (-1.39579 1.69468)
R^2/D10^2 : 0.314561 (-0.314472 0.935005)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.321236e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.337e-08 3.814e-08
25- 50 4.856e-08 3.229e-08
50-150 2.695e-09 2.789e-09
15-150 1.146e-07 7.274e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3834 (-7.52234 15.2338)
Norm : 0.786572 (-0.450728 1.10636)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.34 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.561665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.022e-08 3.725e-08
25- 50 4.207e-08 2.972e-08
50-150 7.797e-09 9.888e-09
15-150 1.101e-07 7.306e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.34298 (-1.39568 1.69479)
R1^2/D10^2 : 0.314471 (-0.314472 0.935017)
kT2 [keV] : 8.12863E-03 (52.6398 -0.00812863)
R2^2/D10^2 : 1.39720E-02 (-0.013972 -0.013972)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.595374e-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
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: 3.05373 ( -0.757176 1.08341 )
Norm@50keV : 1.54301E-04 ( -0.000155725 0.000145767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.54 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 57 degrees of freedom
# Null hypothesis probability = 2.861485e-01
Photon flux (15-150 keV) in 64 sec: 4.42434E-02 ( -0.0170284 0.0172945 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22269e-07 ( -5.58272e-08 6.77005e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.34667E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.79 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 56 degrees of freedom
# Null hypothesis probability = 1.018602e-01
Photon flux (15-150 keV) in 64 sec: 4.70490E-02 ( -0.0158731 0.0160073 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12017e-07 ( -4.20531e-08 4.40883e-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 : 4.53765 ( -4.43796 -4.53765 )
beta : -9.98597 ( 9.98597 19.9586 )
Epeak [keV] : 23.3900 ( -5.89457 4.6991 )
Norm@50keV : 54.5176 ( -18.1559 899.184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.77 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.732160e-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] : 5.34262 (-1.39579 1.69468)
R^2/D10^2 : 0.314561 (-0.314472 0.935005)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.321236e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.337e-08 3.904e-08
25- 50 4.856e-08 2.964e-08
50-150 2.695e-09 2.615e-09
15-150 1.146e-07 7.347e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3834 (-7.52234 15.2338)
Norm : 0.786572 (-0.450728 1.10636)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.34 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.561665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.022e-08 3.744e-08
25- 50 4.207e-08 2.942e-08
50-150 7.797e-09 9.677e-09
15-150 1.101e-07 7.434e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.34298 (-1.39568 1.69479)
R1^2/D10^2 : 0.314471 (-0.314472 0.935017)
kT2 [keV] : 8.12863E-03 (52.6398 -0.00812863)
R2^2/D10^2 : 1.39720E-02 (-0.013972 -0.013972)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.595374e-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:
Sat Apr 29 14:02:04 EDT 2017