batgrbproduct analysis for trigger=892030
batgrbproduct Analysis for Trigger=892030
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): Fri Mar 8 09:11:10 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger892030/GCN5_download_cron
======================================================================
Trigger: 00892030 Segment: 000
BAT Trigger Time: 573629600 [s; MET]
Trigger Stop: 573629920 [s; MET]
UTC: 2019-03-07T05:32:57.471040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.841085591115 Dec: 35.2867435266075 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.25
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.25
Flight Position: [ source = BAT ]
RA: 299.841085591115 Dec: 35.2867435266075 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.695242100587 Dec: 35.2378690908539 [deg; J2000]
{ 19h 58m 46.9s , +35d 14' 16.3" }
+/- 1.27322849813199 [arcmin] (estimated 90% radius based on SNR)
+/- 0.567106001818803 [arcmin] (formal 1-sigma fit error)
SNR: 21.5403206890194
Angular difference between Flight and Ground position is 7.723389 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.529571 2.177590 1.020266 0.175497
0.145890 0.148478 0.126977 0.107551 [error]
Peak 1.529571 2.177590 1.020266 0.175497
0.145890 0.148478 0.126977 0.107551 [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 5.28e-07 7.86e-07 8.75e-07 1.84e-06 2.75e-06 4.03e-06 erg/cm2
Error 6.61e-08 6.82e-08 1.18e-07 4.90e-07 2.80e-07 6.16e-07 erg/cm2
Peak flux Power-law 7.08e-02 5.81e-02 3.23e-02 2.65e-02 1.73e-01 1.88e-01 ph/cm2/s
Error 9.02e-03 5.05e-03 4.22e-03 6.57e-03 1.51e-02 1.65e-02 ph/cm2/s
Fluence Cutoff-PL 4.56e-07 9.38e-07 8.05e-07 2.21e-07 2.38e-06 2.42e-06 erg/cm2
Error 7.72e-08 1.04e-07 1.61e-07 2.56e-07 3.05e-07 3.92e-07 erg/cm2
Peak flux Cutoff-PL 6.00e-02 6.86e-02 3.10e-02 4.56e-03 1.64e-01 1.64e-01 ph/cm2/s
Error 1.06e-02 7.48e-03 5.58e-03 -------- 1.57e-02 1.63e-02 ph/cm2/s
Fluence Band 4.38e-07 9.61e-07 7.70e-07 6.71e-07 2.47e-06 2.84e-06 erg/cm2
Error 7.97e-08 1.06e-07 1.45e-07 -------- 3.08e-07 -------- erg/cm2
Peak flux Band 5.78e-02 7.07e-02 2.95e-02 1.08e-02 1.64e-01 1.69e-01 ph/cm2/s
Error 1.12e-02 7.82e-03 5.21e-03 8.54e-03 1.56e-02 1.77e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.846 0.150 - - 1.23e-03 1.24e-04 68.600 57
CPL 0.243 0.952 45.7 7.7 1.02e-02 2.13e-02 55.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.846 0.150 - - 1.23e-03 1.24e-04 68.600 57
CPL 0.243 0.952 45.7 7.7 1.02e-02 2.13e-02 55.850 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.6952 +35.2379 0.0090 24.1 -90.5 6.8852 21.5 TRIG_00892030
------------------------------------------
Foreground time interval of the image:
0.000 235.240 (delta_t = 235.240 [sec])
236.000 243.080 (delta_t = 7.080 [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 235.240000
236.000000 243.080000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84624 ( -0.14752 0.152574 )
Norm@50keV : 1.23265E-03 ( -0.00012491 0.00012335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.60 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.397357e-01
Photon flux (15-150 keV) in 242.3 sec: 0.172999 ( -0.0150972 0.0151007 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7462e-06 ( -2.77354e-07 2.81674e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 235.240000
236.000000 243.080000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.242596 ( -1.06373 0.841161 )
Epeak [keV] : 45.7030 ( -5.78304 9.61078 )
Norm@50keV : 1.02247E-02 ( -0.0102314 0.03238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.85 using 59 PHA bins.
# Reduced chi-squared = 0.9973 for 56 degrees of freedom
# Null hypothesis probability = 4.806384e-01
Photon flux (15-150 keV) in 242.3 sec: 0.163566 ( -0.015728 0.015756 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37901e-06 ( -2.92803e-07 3.17357e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 235.240000
236.000000 243.080000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.490303 ( -1.2324 2.62773 )
beta : -2.77524 ( 2.78115 0.613559 )
Epeak [keV] : 41.1442 ( -8.7792 9.12612 )
Norm@50keV : 2.99954E-02 ( -0.0270094 1.73551 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.11 using 59 PHA bins.
# Reduced chi-squared = 0.9838 for 55 degrees of freedom
# Null hypothesis probability = 5.086353e-01
Photon flux (15-150 keV) in 242.3 sec: 0.164270 ( 6.83573 -0.015622 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46773e-06 ( -2.46603e-06 -3.01041e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.7891 (-0.919794 1.024)
R^2/D10^2 : 6.38424E-02 (-0.0186671 0.0257574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.77 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.793650e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.747e-07 5.876e-08
25- 50 1.033e-06 9.910e-08
50-150 6.692e-07 1.398e-07
15-150 2.077e-06 2.313e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.8882 (-19.6764 31.2833)
Norm : 0.816654 (-0.0988355 0.115397)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.564623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.142e-07 6.409e-08
25- 50 8.512e-07 7.596e-08
50-150 1.220e-06 4.865e-07
15-150 2.586e-06 4.460e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.88730 (-2.8028 1.62114)
R1^2/D10^2 : 0.108813 (-0.0430062 0.0482827)
kT2 [keV] : 27.8396 (-21.9072 -28.006)
R2^2/D10^2 : 7.60830E-04 (-0.000725528 0.00307722)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.20 using 59 PHA bins.
# Reduced chi-squared = 0.9855 for 55 degrees of freedom
# Null hypothesis probability = 5.051499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.261e-07 1.253e-07
25- 50 9.789e-07 3.425e-07
50-150 1.092e-06 5.576e-07
15-150 2.497e-06 9.119e-07
Peak spectrum fit
Power-law model
Time interval is from 236.000 sec. to 243.080 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84624 ( -0.14752 0.152574 )
Norm@50keV : 1.23265E-03 ( -0.00012491 0.00012335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.60 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.397357e-01
Photon flux (15-150 keV) in 242.3 sec: 0.172999 ( -0.0150972 0.0151007 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7462e-06 ( -2.77354e-07 2.81674e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 236.000 sec. to 243.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.242596 ( -1.06373 0.841161 )
Epeak [keV] : 45.7030 ( -5.78304 9.61078 )
Norm@50keV : 1.02247E-02 ( -0.0102314 0.03238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.85 using 59 PHA bins.
# Reduced chi-squared = 0.9973 for 56 degrees of freedom
# Null hypothesis probability = 4.806384e-01
Photon flux (15-150 keV) in 242.3 sec: 0.163566 ( -0.015728 0.015756 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37901e-06 ( -2.92803e-07 3.17357e-07 ) ergs/cm2
Band function
Time interval is from 236.000 sec. to 243.080 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.490303 ( -1.2324 2.62773 )
beta : -2.77524 ( 2.78115 0.613559 )
Epeak [keV] : 41.1442 ( -8.7792 9.12612 )
Norm@50keV : 2.99954E-02 ( -0.0270094 1.73551 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.11 using 59 PHA bins.
# Reduced chi-squared = 0.9838 for 55 degrees of freedom
# Null hypothesis probability = 5.086353e-01
Photon flux (15-150 keV) in 242.3 sec: 0.164270 ( 6.83573 -0.015622 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46773e-06 ( -2.46603e-06 -3.01041e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.7891 (-0.919794 1.024)
R^2/D10^2 : 6.38424E-02 (-0.0186671 0.0257574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.77 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.793650e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.747e-07 5.585e-08
25- 50 1.033e-06 1.055e-07
50-150 6.692e-07 1.485e-07
15-150 2.077e-06 2.268e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.8882 (-19.6764 31.2833)
Norm : 0.816654 (-0.0988355 0.115397)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.564623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.142e-07 6.397e-08
25- 50 8.512e-07 8.323e-08
50-150 1.220e-06 4.732e-07
15-150 2.586e-06 4.707e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.88730 (-2.8028 1.62114)
R1^2/D10^2 : 0.108813 (-0.0430062 0.0482827)
kT2 [keV] : 27.8396 (-21.9072 -28.006)
R2^2/D10^2 : 7.60830E-04 (-0.000725528 0.00307928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.20 using 59 PHA bins.
# Reduced chi-squared = 0.9855 for 55 degrees of freedom
# Null hypothesis probability = 5.051499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.261e-07 1.215e-07
25- 50 9.789e-07 3.444e-07
50-150 1.092e-06 5.807e-07
15-150 2.497e-06 9.203e-07
Plot creation:
Fri Mar 8 09:17:26 EST 2019