batgrbproduct analysis for trigger=948219
batgrbproduct Analysis for Trigger=948219
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): Wed Jan 8 15:02:33 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger948219/GCN5_download_cron
======================================================================
Trigger: 00948219 Segment: 000
BAT Trigger Time: 600118012.928 [s; MET]
Trigger Stop: 600118017.024 [s; MET]
UTC: 2020-01-07T19:26:28.705120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 107.065612914004 Dec: -83.7157659956246 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.77
Image Trigger?: NO
Rate S/N Ratio: 11.2694276695846 [ if not an image trigger ]
Image S/N Ratio: 9.77
Flight Position: [ source = BAT ]
RA: 107.065612914004 Dec: -83.7157659956246 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 107.066599270836 Dec: -83.7156932409347 [deg; J2000]
{ 07h 08m 16.0s , -83d 42' 56.5" }
+/- 1.16495612874757 [arcmin] (estimated 90% radius based on SNR)
+/- 0.424807980858682 [arcmin] (formal 1-sigma fit error)
SNR: 24.456281358772
Angular difference between Flight and Ground position is 0.007812 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 86.6839998960495 +/- 11.6419496091615
Measured from: -21.83999979496
to: 64.8440001010895 [s; relative to TRIGTIME]
T50: 35.0599999427795 +/- 1.79318260169387
Measured from: 1.07600009441376
to: 36.1360000371933 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 36.0920000076294
to: 37.0920000076294 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.8559999465942
to: 77.0360000133514 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.208631 1.687179 1.382604 0.432635
0.086998 0.087941 0.077536 0.070820 [error]
Peak 0.061589 0.083154 0.064436 0.003576
0.009336 0.009927 0.008721 0.007617 [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 3.62e-07 7.08e-07 1.07e-06 3.55e-06 3.02e-06 5.69e-06 erg/cm2
Error 3.91e-08 4.47e-08 7.65e-08 5.71e-07 1.87e-07 6.18e-07 erg/cm2
Peak flux Power-law 6.55e-01 6.20e-01 4.08e-01 4.16e-01 1.85e+00 2.10e+00 ph/cm2/s
Error 1.37e-01 8.13e-02 7.21e-02 1.48e-01 2.38e-01 2.73e-01 ph/cm2/s
Fluence Cutoff-PL 3.61e-07 7.09e-07 1.08e-06 3.54e-06 3.02e-06 5.70e-06 erg/cm2
Error 4.04e-08 3.36e-08 7.69e-08 8.25e-07 1.41e-07 9.73e-07 erg/cm2
Peak flux Cutoff-PL 6.20e-01 6.42e-01 4.17e-01 2.75e-01 1.83e+00 1.95e+00 ph/cm2/s
Error 1.59e-01 9.85e-02 7.82e-02 2.29e-01 2.46e-01 3.49e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 6.11e-01 6.42e-01 4.21e-01 2.75e-01 1.82e+00 1.95e+00 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 1.398 0.104 - - 2.92e-03 1.65e-04 51.490 57
CPL 1.399 0.145 9999.4 0.0 2.92e-03 6.76e-04 51.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.604 0.227 - - 1.44e-02 1.97e-03 45.660 57
CPL 1.260 0.770 103.9 -12.7 2.18e-02 3.50e-02 45.160 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: 59.392000 sec.
T50 in the 50-300 keV band: 31.552000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 106.892 -29.856 77.036
T90 86.684 -21.840 64.844
T50 35.060 1.076 36.136
Peak 1.000 36.092 37.092
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
107.0666 -83.7157 0.0079 30.1 8.3 4.6933 24.5 TRIG_00948219
------------------------------------------
Foreground time interval of the image:
-29.856 77.036 (delta_t = 106.892 [sec])
Background time interval of the image:
-239.928 -67.598 (delta_t = 172.330 [sec])
-62.928 -29.856 (delta_t = 33.072 [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 -29.856 sec. to 77.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39819 ( -0.104498 0.104034 )
Norm@50keV : 2.91874E-03 ( -0.000164933 0.000164785 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.49 using 59 PHA bins.
# Reduced chi-squared = 0.9033 for 57 degrees of freedom
# Null hypothesis probability = 6.810553e-01
Photon flux (15-150 keV) in 106.9 sec: 0.355302 ( -0.0210067 0.0210695 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.016e-06 ( -1.86992e-07 1.87855e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -29.856 sec. to 77.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39864 ( -0.187984 0.102546 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.91814E-03 ( -0.000165229 0.00118586 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9199 for 56 degrees of freedom
# Null hypothesis probability = 6.451167e-01
Photon flux (15-150 keV) in 106.9 sec: 0.355403 ( -0.021243 0.020808 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01656e-06 ( -9.62635e-08 1.85119e-07 ) ergs/cm2
Band function
Time interval is from -29.856 sec. to 77.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94847 ( -4.94847 -4.94847 )
beta : -1.43276 ( -0.112763 0.110919 )
Epeak [keV] : 22.4811 ( -22.4811 4.55001 )
Norm@50keV : 491.203 ( -27.5943 1.01599e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.58 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 55 degrees of freedom
# Null hypothesis probability = 6.810967e-01
Photon flux (15-150 keV) in 106.9 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] : 16.6635 ( )
R^2/D10^2 : 2.76575E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 135.77 using 59 PHA bins.
# Reduced chi-squared = 2.3819 for 57 degrees of freedom
# Null hypothesis probability = 2.249709e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.681e-07 2.004e-08
25- 50 7.318e-07 6.067e-08
50-150 1.441e-06 1.491e-07
15-150 2.341e-06 1.710e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-18.9633 -200)
Norm : 1.47076 (-0.0831594 0.0831594)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.526151e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.916e-07 2.689e-08
25- 50 7.533e-07 5.618e-08
50-150 1.652e-06 1.395e-07
15-150 2.797e-06 3.854e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.50455 (-1.42925 1.68083)
R1^2/D10^2 : 0.295533 (-0.141437 0.317862)
kT2 [keV] : 32.9041 (-6.88288 14.5807)
R2^2/D10^2 : 2.33427E-03 (-0.00154989 0.00280376)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.49 using 59 PHA bins.
# Reduced chi-squared = 0.9725 for 55 degrees of freedom
# Null hypothesis probability = 5.325080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.454e-07 7.408e-08
25- 50 7.320e-07 1.304e-07
50-150 1.971e-06 5.696e-07
15-150 3.048e-06 7.403e-07
Peak spectrum fit
Power-law model
Time interval is from 36.092 sec. to 37.092 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60445 ( -0.224039 0.230332 )
Norm@50keV : 1.43949E-02 ( -0.00198508 0.00195367 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.66 using 59 PHA bins.
# Reduced chi-squared = 0.8010 for 57 degrees of freedom
# Null hypothesis probability = 8.596966e-01
Photon flux (15-150 keV) in 1 sec: 1.85237 ( -0.237679 0.237888 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3455e-07 ( -1.98375e-08 2.01602e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 36.092 sec. to 37.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26011 ( -0.988789 0.551792 )
Epeak [keV] : 103.854 ( -78.4977 -103.854 )
Norm@50keV : 2.17749E-02 ( -0.0217749 0.0481324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.16 using 59 PHA bins.
# Reduced chi-squared = 0.8065 for 56 degrees of freedom
# Null hypothesis probability = 8.495475e-01
Photon flux (15-150 keV) in 1 sec: 1.82591 ( -0.24706 0.24594 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30965e-07 ( -2.1697e-08 2.1906e-08 ) ergs/cm2
Band function
Time interval is from 36.092 sec. to 37.092 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26025 ( -3.1711 0.937047 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 103.883 ( -48.4114 -103.885 )
Norm@50keV : 2.17670E-02 ( -0.0091453 0.0490117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.16 using 59 PHA bins.
# Reduced chi-squared = 0.8212 for 55 degrees of freedom
# Null hypothesis probability = 8.253186e-01
Photon flux (15-150 keV) in 1 sec: 1.82235 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25559e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.6721 (-2.07401 2.5531)
R^2/D10^2 : 0.285552 (-0.130656 0.229652)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.95 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.041256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 2.845e-09
25- 50 4.102e-08 7.450e-09
50-150 4.987e-08 1.399e-08
15-150 1.022e-07 1.855e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 169.573 (-75.7858 -169.572)
Norm : 7.59825 (-1.01866 1.22447)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.19 using 59 PHA bins.
# Reduced chi-squared = 0.7928 for 57 degrees of freedom
# Null hypothesis probability = 8.706765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.929e-08 1.079e-08
25- 50 3.637e-08 1.959e-08
50-150 7.533e-08 4.237e-08
15-150 1.310e-07 7.275e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31113 (-2.74277 4.18215)
R1^2/D10^2 : 4.97568 (-4.12307 16.8426)
kT2 [keV] : 20.7218 (-5.79456 18.4103)
R2^2/D10^2 : 5.44021E-02 (-0.0480175 0.131376)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.91 using 59 PHA bins.
# Reduced chi-squared = 0.8348 for 55 degrees of freedom
# Null hypothesis probability = 8.036816e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.975e-08 1.033e-08
25- 50 3.420e-08 1.737e-08
50-150 7.294e-08 4.220e-08
15-150 1.269e-07 5.781e-08
Plot creation:
Wed Jan 8 15:07:01 EST 2020