batgrbproduct analysis for trigger=796098
batgrbproduct Analysis for Trigger=796098
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 Dec 10 17:49:17 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger796098/GCN5_download_cron
======================================================================
Trigger: 00796098 Segment: 000
BAT Trigger Time: 534522605.76 [s; MET]
Trigger Stop: 534522606.784 [s; MET]
UTC: 2017-12-09T14:29:45.631160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 12.1767342269333 Dec: 40.635246236599 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.97
Image Trigger?: NO
Rate S/N Ratio: 7.48331477354788 [ if not an image trigger ]
Image S/N Ratio: 5.97
Flight Position: [ source = BAT ]
RA: 12.1767342269333 Dec: 40.635246236599 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 12.0633580428422 Dec: 40.6374301560446 [deg; J2000]
{ 00h 48m 15.2s , +40d 38' 14.7" }
+/- 3.73238909168288 [arcmin] (estimated 90% radius based on SNR)
+/- 2.39753839985421 [arcmin] (formal 1-sigma fit error)
SNR: 4.63440752560689
Angular difference between Flight and Ground position is 5.163851 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: -2.98023223876953e-08
to: 1.02399995923042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.027637 0.025098 -0.000439 0.006678
0.008299 0.008206 0.006268 0.005316 [error]
Peak 0.027637 0.025098 -0.000439 0.006678
0.008299 0.008206 0.006268 0.005316 [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 9.08e-09 7.94e-09 4.77e-09 4.33e-09 2.36e-08 2.65e-08 erg/cm2
Error 3.61e-09 3.68e-09 4.74e-09 7.40e-09 1.11e-08 1.49e-08 erg/cm2
Peak flux Power-law 2.93e-01 1.44e-01 4.33e-02 1.65e-02 4.90e-01 4.98e-01 ph/cm2/s
Error 1.18e-01 6.45e-02 4.20e-02 2.61e-02 1.85e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 9.32e-09 1.02e-08 8.46e-11 1.56e-17 1.97e-08 1.96e-08 erg/cm2
Error 4.11e-09 5.71e-09 2.33e-09 0.00e+00 7.94e-09 7.95e-09 erg/cm2
Peak flux Cutoff-PL 2.80e-01 2.03e-01 9.96e-04 1.07e-10 4.84e-01 4.84e-01 ph/cm2/s
Error 1.29e-01 1.01e-01 2.27e-02 0.00e+00 1.70e-01 1.70e-01 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 2.728 0.769 - - 2.16e-03 1.38e-03 51.220 57
CPL -9.855 0.466 25.7 4.5 2.57e+06 1.03e+07 45.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.728 0.769 - - 2.16e-03 1.38e-03 51.220 57
CPL -9.855 0.466 25.7 4.5 2.57e+06 1.03e+07 45.510 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
12.0634 +40.6374 0.0417 27.1 -159.9 0.0655 4.6 TRIG_00796098
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-239.760 -186.390 (delta_t = 53.370 [sec])
-185.760 -5.760 (delta_t = 180.000 [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
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72769 ( -0.646816 0.891131 )
Norm@50keV : 2.15645E-03 ( -0.00130443 0.00145856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.22 using 59 PHA bins.
# Reduced chi-squared = 0.8986 for 57 degrees of freedom
# Null hypothesis probability = 6.906474e-01
Photon flux (15-150 keV) in 1.024 sec: 0.489961 ( -0.184559 0.185366 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36363e-08 ( -1.04002e-08 1.17309e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.85532 ( 9.90637 10.8375 )
Epeak [keV] : 25.7103 ( -1.94481 7.05045 )
Norm@50keV : 2.56968E+06 ( -3.06129e+06 1.75787e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.51 using 59 PHA bins.
# Reduced chi-squared = 0.8126 for 56 degrees of freedom
# Null hypothesis probability = 8.406229e-01
Photon flux (15-150 keV) in 1.024 sec: 0.484477 ( -0.15893 0.181013 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96601e-08 ( -6.56435e-09 9.3228e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -8.04156 -5 )
beta : -5.37971 ( 5.27229 2.28428 )
Epeak [keV] : 26.1448 ( -5.69662 5.18042 )
Norm@50keV : 615.238 ( -203.652 2670.54 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8311 for 55 degrees of freedom
# Null hypothesis probability = 8.097103e-01
Photon flux (15-150 keV) in 1.024 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] : 6.52764 (-1.69916 2.22766)
R^2/D10^2 : 1.46010 (-1.46021 3.76081)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8161 for 57 degrees of freedom
# Null hypothesis probability = 8.378938e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.463e-09 5.668e-09
25- 50 1.128e-08 6.861e-09
50-150 1.441e-09 1.272e-09
15-150 2.218e-08 1.389e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.9045 (-11.2559 23.1513)
Norm : 5.44241 (-2.77516 5.76242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.72 using 59 PHA bins.
# Reduced chi-squared = 0.8548 for 57 degrees of freedom
# Null hypothesis probability = 7.743256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.612e-09 5.774e-09
25- 50 9.295e-09 6.287e-09
50-150 3.464e-09 3.671e-09
15-150 2.237e-08 1.506e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.56675 (-6.55524 -6.55524)
R1^2/D10^2 : 1.18062 (-1.18416 -1.18416)
kT2 [keV] : 6.43918 (-6.49514 -6.49514)
R2^2/D10^2 : 0.264640 (-0.270663 -0.270663)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8458 for 55 degrees of freedom
# Null hypothesis probability = 7.852329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.440e-09 3.082e-02
25- 50 1.131e-08 2.587e-01
50-150 1.461e-09 5.197e+00
15-150 2.221e-08 6.856e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72769 ( -0.646816 0.891131 )
Norm@50keV : 2.15645E-03 ( -0.00130443 0.00145856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.22 using 59 PHA bins.
# Reduced chi-squared = 0.8986 for 57 degrees of freedom
# Null hypothesis probability = 6.906474e-01
Photon flux (15-150 keV) in 1.024 sec: 0.489961 ( -0.184559 0.185366 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36363e-08 ( -1.04002e-08 1.17309e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.85532 ( 9.90637 10.8375 )
Epeak [keV] : 25.7103 ( -1.94481 7.05045 )
Norm@50keV : 2.56968E+06 ( -3.06129e+06 1.75787e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.51 using 59 PHA bins.
# Reduced chi-squared = 0.8126 for 56 degrees of freedom
# Null hypothesis probability = 8.406229e-01
Photon flux (15-150 keV) in 1.024 sec: 0.484477 ( -0.15893 0.181013 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96601e-08 ( -6.56435e-09 9.3228e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -8.04156 -5 )
beta : -5.37971 ( 5.27229 2.28428 )
Epeak [keV] : 26.1448 ( -5.69662 5.18042 )
Norm@50keV : 615.238 ( -203.652 2670.54 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8311 for 55 degrees of freedom
# Null hypothesis probability = 8.097103e-01
Photon flux (15-150 keV) in 1.024 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] : 6.52764 (-1.69916 2.22766)
R^2/D10^2 : 1.46010 (-1.46021 3.76081)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8161 for 57 degrees of freedom
# Null hypothesis probability = 8.378938e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.463e-09 5.888e-09
25- 50 1.128e-08 7.337e-09
50-150 1.441e-09 1.374e-09
15-150 2.218e-08 1.371e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.9045 (-11.2559 23.1513)
Norm : 5.44241 (-2.77516 5.76242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.72 using 59 PHA bins.
# Reduced chi-squared = 0.8548 for 57 degrees of freedom
# Null hypothesis probability = 7.743256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.612e-09 5.857e-09
25- 50 9.295e-09 6.338e-09
50-150 3.464e-09 3.553e-09
15-150 2.237e-08 1.486e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.56675 (-6.55524 -6.55524)
R1^2/D10^2 : 1.18062 (-1.18416 -1.18416)
kT2 [keV] : 6.43918 (-6.49514 -6.49514)
R2^2/D10^2 : 0.264640 (-0.270663 -0.270663)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8458 for 55 degrees of freedom
# Null hypothesis probability = 7.852329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.440e-09 3.147e-02
25- 50 1.131e-08 2.459e-01
50-150 1.461e-09 6.205e+00
15-150 2.221e-08 6.487e+00
Plot creation:
Sun Dec 10 18:15:05 EST 2017