batgrbproduct analysis for trigger=972010
batgrbproduct Analysis for Trigger=972010
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 v2.47
Process Start Time (local time): Thu May 14 20:48:36 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger972010/GCN5_download_cron
======================================================================
Trigger: 00972010 Segment: 000
BAT Trigger Time: 611069256 [s; MET]
Trigger Stop: 611069576 [s; MET]
UTC: 2020-05-13T13:27:11.066340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.053948228478 Dec: -15.3916049277441 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.01
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.01
Flight Position: [ source = BAT ]
RA: 245.053948228478 Dec: -15.3916049277441 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.034177977384 Dec: -15.5356852363674 [deg; J2000]
{ 16h 20m 08.2s , -15d 32' 08.5" }
+/- 1.54978973806079 [arcmin] (estimated 90% radius based on SNR)
+/- 0.58553262789129 [arcmin] (formal 1-sigma fit error)
SNR: 16.2667248836084
Angular difference between Flight and Ground position is 8.720090 arcmin
Partial Coding Fraction: 0.4335938 [ 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 0.816684 0.137859 0.007944 0.002615
0.058450 0.051673 0.043160 0.036335 [error]
Peak 0.816684 0.137859 0.007944 0.002615
0.058450 0.051673 0.043160 0.036335 [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 2.65e-07 5.22e-08 5.06e-09 5.36e-10 3.22e-07 3.22e-07 erg/cm2
Error 4.03e-08 2.27e-08 5.20e-09 1.12e-09 5.47e-08 5.48e-08 erg/cm2
Peak flux Power-law 2.79e-01 3.20e-02 1.55e-03 7.89e-05 3.13e-01 3.13e-01 ph/cm2/s
Error 4.29e-02 1.32e-02 1.55e-03 1.57e-04 4.82e-02 4.82e-02 ph/cm2/s
Fluence Cutoff-PL 2.73e-07 3.78e-08 4.13e-10 1.21e-13 3.11e-07 3.11e-07 erg/cm2
Error 4.49e-08 3.29e-08 5.82e-09 3.04e-10 5.69e-08 5.55e-08 erg/cm2
Peak flux Cutoff-PL 2.87e-01 2.43e-02 1.41e-04 2.19e-08 3.11e-01 3.11e-01 ph/cm2/s
Error 4.74e-02 1.95e-02 1.72e-03 1.45e-04 4.75e-02 4.75e-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 5.365 0.769 - - 1.43e-04 1.15e-04 50.020 57
CPL 1.000 0.000 50.0 0.0 3.09e-03 0.00e+00 133.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.365 0.769 - - 1.43e-04 1.15e-04 50.020 57
CPL 1.000 0.000 50.0 0.0 3.09e-03 0.00e+00 133.060 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
245.0342 -15.5357 0.0118 29.1 92.0 1.6887 16.3 TRIG_00972010
------------------------------------------
Foreground time interval of the image:
0.000 33.070 (delta_t = 33.070 [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 33.070 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.36510 ( -0.725148 0.813566 )
Norm@50keV : 1.42513E-04 ( -8.27238e-05 0.000148046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.02 using 59 PHA bins.
# Reduced chi-squared = 0.8776 for 57 degrees of freedom
# Null hypothesis probability = 7.321344e-01
Photon flux (15-150 keV) in 33.07 sec: 0.312773 ( -0.0481475 0.0481687 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22286e-07 ( -5.40208e-08 5.54131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.070 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.08770E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.06 using 59 PHA bins.
# Reduced chi-squared = 2.3761 for 56 degrees of freedom
# Null hypothesis probability = 3.236640e-08
Photon flux (15-150 keV) in 33.07 sec: 0.311406 ( -0.047464 0.047471 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.10871e-07 ( -5.02767e-08 6.35347e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.070 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -5.41906 ( -0.770023 0.772714 )
Epeak [keV] : 1.91217 ( -1.91217 -1.91217 )
Norm@50keV : 1.83011E-02 ( -0.0104954 0.0209163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.03 using 59 PHA bins.
# Reduced chi-squared = 0.9097 for 55 degrees of freedom
# Null hypothesis probability = 6.643492e-01
Photon flux (15-150 keV) in 33.07 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] : 2.59409 (-0.358584 0.433205)
R^2/D10^2 : 118.735 (-118.735 242.61)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.8829 for 57 degrees of freedom
# Null hypothesis probability = 7.218047e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.805e-07 1.375e-07
25- 50 2.389e-08 1.436e-08
50-150 1.077e-11 1.160e-11
15-150 3.044e-07 1.650e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.90196 (-1.00691 1.42009)
Norm : 77.4243 (-44.7939 116.133)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.77 using 59 PHA bins.
# Reduced chi-squared = 0.8731 for 57 degrees of freedom
# Null hypothesis probability = 7.405503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.756e-07 1.121e-07
25- 50 3.329e-08 1.768e-08
50-150 1.560e-10 1.595e-10
15-150 3.090e-07 1.488e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.68516E-04 (0.000229998 -0.000168516)
R1^2/D10^2 : 2.00713E+06 (-2.00713e+06 -2.00713e+06)
kT2 [keV] : 2.59406 (-0.358537 0.43325)
R2^2/D10^2 : 118.747 (-118.749 242.595)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.9871 for 55 degrees of freedom
# Reduced chi-squared = 0.9150 for 55 degrees of freedom
# Null hypothesis probability = 5.017692e-01
# Null hypothesis probability = 6.535420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.640e-07 9.055e-03
25- 50 4.458e-08 5.567e-02
50-150 1.010e-10 1.731e+00
15-150 3.087e-07 1.878e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 33.070 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.36510 ( -0.725148 0.813566 )
Norm@50keV : 1.42513E-04 ( -8.27238e-05 0.000148046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.02 using 59 PHA bins.
# Reduced chi-squared = 0.8776 for 57 degrees of freedom
# Null hypothesis probability = 7.321344e-01
Photon flux (15-150 keV) in 33.07 sec: 0.312773 ( -0.0481475 0.0481687 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22286e-07 ( -5.40208e-08 5.54131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.070 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.08770E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.06 using 59 PHA bins.
# Reduced chi-squared = 2.3761 for 56 degrees of freedom
# Null hypothesis probability = 3.236640e-08
Photon flux (15-150 keV) in 33.07 sec: 0.311406 ( -0.047464 0.047471 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.10871e-07 ( -5.02767e-08 6.35347e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.070 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -5.41906 ( -0.770023 0.772714 )
Epeak [keV] : 1.91217 ( -1.91217 -1.91217 )
Norm@50keV : 1.83011E-02 ( -0.0104954 0.0209163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.03 using 59 PHA bins.
# Reduced chi-squared = 0.9097 for 55 degrees of freedom
# Null hypothesis probability = 6.643492e-01
Photon flux (15-150 keV) in 33.07 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] : 2.59409 (-0.358584 0.433205)
R^2/D10^2 : 118.735 (-118.735 242.61)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.8829 for 57 degrees of freedom
# Null hypothesis probability = 7.218047e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.805e-07 1.371e-07
25- 50 2.389e-08 1.455e-08
50-150 1.077e-11 1.150e-11
15-150 3.044e-07 1.616e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.90196 (-1.00691 1.42009)
Norm : 77.4243 (-44.7939 116.133)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.77 using 59 PHA bins.
# Reduced chi-squared = 0.8731 for 57 degrees of freedom
# Null hypothesis probability = 7.405503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.756e-07 1.206e-07
25- 50 3.329e-08 1.745e-08
50-150 1.560e-10 1.583e-10
15-150 3.090e-07 1.429e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.68516E-04 (0.000229998 -0.000168516)
R1^2/D10^2 : 2.00713E+06 (-2.00713e+06 -2.00713e+06)
kT2 [keV] : 2.59406 (-0.358537 0.43325)
R2^2/D10^2 : 118.747 (-118.749 242.595)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.9871 for 55 degrees of freedom
# Reduced chi-squared = 0.9150 for 55 degrees of freedom
# Null hypothesis probability = 5.017692e-01
# Null hypothesis probability = 6.535420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.640e-07 8.297e-03
25- 50 4.458e-08 6.445e-02
50-150 1.010e-10 1.690e+00
15-150 3.087e-07 1.563e+00
Plot creation:
Thu May 14 20:51:21 EDT 2020