batgrbproduct Analysis for Trigger=730874
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 Jan 8 08:05:22 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger730874/GCN5_download_cron
======================================================================
Trigger: 00730874 Segment: 000
BAT Trigger Time: 505489064 [s; MET]
Trigger Stop: 505489128 [s; MET]
UTC: 2017-01-07T13:37:25.575180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 40.0381428109793 Dec: 39.1324567670486 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.94
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.94
Flight Position: [ source = BAT ]
RA: 40.0381428109793 Dec: 39.1324567670486 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 40.0948444795093 Dec: 39.1477378890368 [deg; J2000]
{ 02h 40m 22.8s , +39d 08' 51.9" }
+/- 3.78504856451787 [arcmin] (estimated 90% radius based on SNR)
+/- 2.88534825021943 [arcmin] (formal 1-sigma fit error)
SNR: 4.54257403387236
Angular difference between Flight and Ground position is 2.793440 arcmin
Partial Coding Fraction: 1 [ 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 0.109354 0.134291 0.044178 0.033795
0.042755 0.044013 0.038117 0.033001 [error]
Peak 0.109354 0.134291 0.044178 0.033795
0.042755 0.044013 0.038117 0.033001 [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 2.96e-08 4.65e-08 5.50e-08 1.26e-07 1.68e-07 2.57e-07 erg/cm2
Error 1.59e-08 1.82e-08 3.38e-08 1.83e-07 8.12e-08 2.05e-07 erg/cm2
Peak flux Power-law 1.50e-02 1.30e-02 7.66e-03 6.79e-03 3.86e-02 4.24e-02 ph/cm2/s
Error 8.18e-03 5.07e-03 4.57e-03 9.11e-03 1.51e-02 1.73e-02 ph/cm2/s
Fluence Cutoff-PL 2.85e-08 6.22e-08 2.28e-08 5.43e-10 1.14e-07 1.14e-07 erg/cm2
Error 1.79e-08 2.53e-08 4.22e-08 1.52e-07 8.62e-08 1.91e-07 erg/cm2
Peak flux Cutoff-PL 1.40e-02 1.75e-02 3.62e-03 4.81e-05 3.52e-02 3.52e-02 ph/cm2/s
Error 9.13e-03 8.09e-03 5.84e-03 7.66e-03 1.48e-02 1.75e-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 1.759 0.724 - - 2.84e-04 1.33e-04 54.040 57
CPL -1.200 1.046 35.9 0.0 2.57e-02 0.00e+00 53.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.759 0.724 - - 2.84e-04 1.33e-04 54.040 57
CPL -1.200 1.046 35.9 0.0 2.57e-02 0.00e+00 53.160 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
40.0948 +39.1477 0.0425 7.8 -114.4 0.3787 4.5 TRIG_00730874
------------------------------------------
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: 1.75854 ( -0.687957 0.759943 )
Norm@50keV : 2.84321E-04 ( -0.000136463 0.000130155 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.04 using 59 PHA bins.
# Reduced chi-squared = 0.9481 for 57 degrees of freedom
# Null hypothesis probability = 5.867704e-01
Photon flux (15-150 keV) in 64 sec: 3.85666E-02 ( -0.0150694 0.0150707 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67814e-07 ( -7.72544e-08 8.52358e-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: -1.20049 ( 1.25736 3.34848 )
Epeak [keV] : 35.8927 ( )
Norm@50keV : 2.56534E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9493 for 56 degrees of freedom
# Null hypothesis probability = 5.831203e-01
Photon flux (15-150 keV) in 64 sec: 3.51869E-02 ( -0.0139059 0.015632 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14068e-07 ( -5.00518e-08 1.22253e-07 ) 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 : 5.00000 ( -5 -5 )
beta : -2.38026 ( 2.38131 1.02864 )
Epeak [keV] : 27.1967 ( -27.1916 12.0032 )
Norm@50keV : 26.9307 ( -10.0547 334767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 55 degrees of freedom
# Null hypothesis probability = 5.827732e-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] : 9.08095 (-2.86724 4.53199)
R^2/D10^2 : 2.77522E-02 (-0.0277522 0.0887895)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9329 for 57 degrees of freedom
# Null hypothesis probability = 6.193448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.865e-08 1.769e-08
25- 50 6.174e-08 3.811e-08
50-150 2.421e-08 2.019e-08
15-150 1.146e-07 7.280e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.8258 (-82.8258 -82.8258)
Norm : 0.180835 (-0.0806224 0.168101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.82 using 59 PHA bins.
# Reduced chi-squared = 0.9442 for 57 degrees of freedom
# Null hypothesis probability = 5.952261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.009e-08 1.920e-08
25- 50 4.995e-08 3.188e-08
50-150 7.215e-08 6.138e-08
15-150 1.522e-07 1.111e-07
Double BB
R1^2/D10^2 : 4.48837E-06 (-4.48813e-06 -4.48813e-06)
kT2 [keV] : 8.17669 (-1.82735 4.00485)
R2^2/D10^2 : 3.81787E-02 (-0.0274384 0.0299574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9662 for 55 degrees of freedom
# Reduced chi-squared = 0.9384 for 55 degrees of freedom
# Reduced chi-squared = 0.9376 for 55 degrees of freedom
# Null hypothesis probability = 5.459218e-01
# Null hypothesis probability = 6.049168e-01
# Null hypothesis probability = 6.065674e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.900e-08 4.746e-06
25- 50 5.964e-08 4.275e-05
50-150 2.837e-08 7.034e-04
15-150 1.170e-07 9.578e-04
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: 1.75854 ( -0.687957 0.759943 )
Norm@50keV : 2.84321E-04 ( -0.000136463 0.000130155 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.04 using 59 PHA bins.
# Reduced chi-squared = 0.9481 for 57 degrees of freedom
# Null hypothesis probability = 5.867704e-01
Photon flux (15-150 keV) in 64 sec: 3.85666E-02 ( -0.0150694 0.0150707 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67814e-07 ( -7.72544e-08 8.52358e-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: -1.20049 ( 1.25736 3.34848 )
Epeak [keV] : 35.8927 ( )
Norm@50keV : 2.56534E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9493 for 56 degrees of freedom
# Null hypothesis probability = 5.831203e-01
Photon flux (15-150 keV) in 64 sec: 3.51869E-02 ( -0.0139059 0.015632 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14068e-07 ( -5.00518e-08 1.22253e-07 ) 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 : 5.00000 ( -5 -5 )
beta : -2.38026 ( 2.38131 1.02864 )
Epeak [keV] : 27.1967 ( -27.1916 12.0032 )
Norm@50keV : 26.9307 ( -10.0547 334767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 55 degrees of freedom
# Null hypothesis probability = 5.827732e-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] : 9.08095 (-2.86724 4.53199)
R^2/D10^2 : 2.77522E-02 (-0.0277522 0.0887895)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9329 for 57 degrees of freedom
# Null hypothesis probability = 6.193448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.865e-08 1.838e-08
25- 50 6.174e-08 3.920e-08
50-150 2.421e-08 1.954e-08
15-150 1.146e-07 7.597e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.8258 (-82.8258 -82.8258)
Norm : 0.180835 (-0.0806224 0.168101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.82 using 59 PHA bins.
# Reduced chi-squared = 0.9442 for 57 degrees of freedom
# Null hypothesis probability = 5.952261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.009e-08 1.946e-08
25- 50 4.995e-08 3.189e-08
50-150 7.215e-08 6.442e-08
15-150 1.522e-07 1.070e-07
Double BB
R1^2/D10^2 : 4.48837E-06 (-4.48813e-06 -4.48813e-06)
kT2 [keV] : 8.17669 (-1.82735 4.00485)
R2^2/D10^2 : 3.81787E-02 (-0.0274384 0.0299574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9662 for 55 degrees of freedom
# Reduced chi-squared = 0.9384 for 55 degrees of freedom
# Reduced chi-squared = 0.9376 for 55 degrees of freedom
# Null hypothesis probability = 5.459218e-01
# Null hypothesis probability = 6.049168e-01
# Null hypothesis probability = 6.065674e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.900e-08 5.821e-06
25- 50 5.964e-08 4.285e-05
50-150 2.837e-08 6.720e-04
15-150 1.170e-07 7.158e-04
Plot creation:
Sun Jan 8 08:11:39 EST 2017