batgrbproduct analysis for trigger=980210
batgrbproduct Analysis for Trigger=980210
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): Wed Jul 1 07:35:10 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger980210/GCN5_download_cron
======================================================================
Trigger: 00980210 Segment: 000
BAT Trigger Time: 615174599.68 [s; MET]
Trigger Stop: 615174600.704 [s; MET]
UTC: 2020-06-30T01:49:34.479260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 91.379712975187 Dec: -60.7892931093061 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.07
Image Trigger?: NO
Rate S/N Ratio: 15.2643375224737 [ if not an image trigger ]
Image S/N Ratio: 9.07
Flight Position: [ source = BAT ]
RA: 91.379712975187 Dec: -60.7892931093061 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 91.3816740963468 Dec: -60.7817381250767 [deg; J2000]
{ 06h 05m 31.6s , -60d 46' 54.3" }
+/- 1.93908057383659 [arcmin] (estimated 90% radius based on SNR)
+/- 0.731036908314913 [arcmin] (formal 1-sigma fit error)
SNR: 11.8104693752212
Angular difference between Flight and Ground position is 0.456923 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 14.7120000123978 +/- 3.89270958922508
Measured from: -0.267999887466431
to: 14.4440001249313 [s; relative to TRIGTIME]
T50: 5.26800000667572 +/- 3.68576930354407
Measured from: 0.776000142097473
to: 6.04400014877319 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0640000104904175
to: 1.06400001049042 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.51199996471405
to: 17.9080001115799 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.234579 0.303837 0.171407 0.099755
0.032688 0.034058 0.030108 0.028084 [error]
Peak 0.038734 0.067431 0.046769 0.021232
0.008664 0.009202 0.008367 0.007180 [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 7.29e-08 1.22e-07 1.55e-07 3.93e-07 4.58e-07 7.42e-07 erg/cm2
Error 1.44e-08 1.52e-08 3.01e-08 1.61e-07 7.01e-08 1.88e-07 erg/cm2
Peak flux Power-law 3.75e-01 4.35e-01 3.63e-01 5.11e-01 1.36e+00 1.68e+00 ph/cm2/s
Error 1.10e-01 7.64e-02 6.70e-02 2.05e-01 2.11e-01 2.73e-01 ph/cm2/s
Fluence Cutoff-PL 7.31e-08 1.22e-07 1.54e-07 3.92e-07 4.56e-07 7.07e-07 erg/cm2
Error 1.44e-08 1.52e-08 3.01e-08 2.53e-07 7.20e-08 1.93e-07 erg/cm2
Peak flux Cutoff-PL 3.83e-01 4.38e-01 3.60e-01 4.93e-01 1.36e+00 1.68e+00 ph/cm2/s
Error 1.10e-01 7.66e-02 6.73e-02 2.53e-01 2.11e-01 2.92e-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 1.656 0.235 - - 2.80e-03 3.95e-04 39.750 57
CPL 1.661 0.237 9999.4 -0.0 2.79e-03 2.17e-03 39.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.260 0.280 - - 1.14e-02 1.75e-03 43.250 57
CPL 1.262 0.441 9999.1 0.0 1.15e-02 6.31e-03 43.260 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: 2.944000 sec.
T50 in the 50-300 keV band: 1.600000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.420 -0.512 17.908
T90 14.712 -0.268 14.444
T50 5.268 0.776 6.044
Peak 1.000 0.064 1.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
91.3817 -60.7817 0.0162 21.7 72.4 0.8363 11.8 TRIG_00980210
------------------------------------------
Foreground time interval of the image:
-0.512 12.510 (delta_t = 13.022 [sec])
13.320 17.908 (delta_t = 4.588 [sec])
Background time interval of the image:
-60.680 -50.640 (delta_t = 10.040 [sec])
-49.680 -0.512 (delta_t = 49.168 [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
Multiple GTIs in the spectrum
tstart tstop
-0.512000 12.510000
13.320000 17.908000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65559 ( -0.231724 0.239186 )
Norm@50keV : 2.80010E-03 ( -0.000400373 0.000390389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.75 using 59 PHA bins.
# Reduced chi-squared = 0.6974 for 57 degrees of freedom
# Null hypothesis probability = 9.600235e-01
Photon flux (15-150 keV) in 17.61 sec: 0.366301 ( -0.0457714 0.0457871 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58346e-07 ( -6.92772e-08 7.08422e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.512000 12.510000
13.320000 17.908000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66075 ( -0.237936 0.235799 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 2.79309E-03 ( -0.000399443 0.00393157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.76 using 59 PHA bins.
# Reduced chi-squared = 0.7100 for 56 degrees of freedom
# Null hypothesis probability = 9.505315e-01
Photon flux (15-150 keV) in 17.61 sec: 0.366425 ( -0.045642 0.045591 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.55851e-07 ( -6.92936e-08 7.46629e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.512000 12.510000
13.320000 17.908000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23147 ( 1.22947 1.22947 )
beta : -1.66030 ( 1.66043 0.236195 )
Epeak [keV] : 37.5342 ( -37.5238 -37.5238 )
Norm@50keV : 6.24495E-03 ( -0.00397952 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.74 using 59 PHA bins.
# Reduced chi-squared = 0.7226 for 55 degrees of freedom
# Null hypothesis probability = 9.395873e-01
Photon flux (15-150 keV) in 17.61 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] : 11.8012 (-1.82368 2.23826)
R^2/D10^2 : 9.29744E-02 (-0.0433922 0.0785442)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.274244e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.815e-08 1.302e-08
25- 50 1.486e-07 2.579e-08
50-150 1.230e-07 3.857e-08
15-150 3.197e-07 5.107e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.502 (-75.0294 -155.802)
Norm : 1.49892 (-0.19979 0.281456)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.99 using 59 PHA bins.
# Reduced chi-squared = 0.7191 for 57 degrees of freedom
# Null hypothesis probability = 9.457499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.750e-08 3.729e-08
25- 50 1.260e-07 6.782e-08
50-150 2.537e-07 1.483e-07
15-150 4.472e-07 2.517e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.97401 (-3.12975 1.94883)
R1^2/D10^2 : 0.222084 (-0.130505 0.771312)
kT2 [keV] : 200.000 (-178.38 -200)
R2^2/D10^2 : 4.96071E-05 (-1.62856e-05 0.00018494)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.45 using 59 PHA bins.
#Fit statistic : Chi-Squared = 40.31 using 59 PHA bins.
# Reduced chi-squared = 0.7354 for 55 degrees of freedom
# Reduced chi-squared = 0.7329 for 55 degrees of freedom
# Null hypothesis probability = 9.289516e-01
# Null hypothesis probability = 9.311466e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.392e-08 2.259e-08
25- 50 1.371e-07 4.726e-08
50-150 2.855e-07 2.339e-07
15-150 4.866e-07 2.511e-07
Peak spectrum fit
Power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26028 ( -0.28336 0.276514 )
Norm@50keV : 1.14498E-02 ( -0.00174766 0.00174558 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.25 using 59 PHA bins.
# Reduced chi-squared = 0.7587 for 57 degrees of freedom
# Null hypothesis probability = 9.107620e-01
Photon flux (15-150 keV) in 1 sec: 1.35649 ( -0.211164 0.211726 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14283e-07 ( -1.96774e-08 1.99121e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26190 ( -0.608904 0.273278 )
Epeak [keV] : 9999.13 ( -9999.33 -9999.33 )
Norm@50keV : 1.14958E-02 ( -0.00175386 0.010875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.26 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 56 degrees of freedom
# Null hypothesis probability = 8.934362e-01
Photon flux (15-150 keV) in 1 sec: 1.35972 ( -0.21305 0.20859 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14216e-07 ( -1.96118e-08 1.9449e-08 ) ergs/cm2
Band function
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.858520 ( 0.856686 0.856686 )
beta : -1.28573 ( 1.28576 0.306371 )
Epeak [keV] : 85.8248 ( -85.0111 -85.0111 )
Norm@50keV : 2.13706E-02 ( -0.011958 3115.28 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.20 using 59 PHA bins.
# Reduced chi-squared = 0.7855 for 55 degrees of freedom
# Null hypothesis probability = 8.754129e-01
Photon flux (15-150 keV) in 1 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] : 15.9498 (-3.34701 5.01626)
R^2/D10^2 : 0.126016 (-0.125237 0.156398)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.07 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 3.998437e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.633e-09 2.017e-09
25- 50 2.784e-08 7.515e-09
50-150 4.944e-08 1.462e-08
15-150 8.391e-08 2.384e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-59.5111 -200)
Norm : 5.57860 (-0.862968 0.862968)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.10 using 59 PHA bins.
# Reduced chi-squared = 0.8264 for 57 degrees of freedom
# Null hypothesis probability = 8.220514e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.390e-08 7.990e-09
25- 50 2.673e-08 1.543e-08
50-150 5.863e-08 3.279e-08
15-150 9.925e-08 5.635e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.83735 (-2.31602 2.93316)
R1^2/D10^2 : 0.535831 (-0.448842 0.969022)
kT2 [keV] : 200.000 (-162.017 -200)
R2^2/D10^2 : 2.53723E-04 (-7.47238e-05 7.45224e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.79 using 59 PHA bins.
#Fit statistic : Chi-Squared = 39.56 using 59 PHA bins.
# Reduced chi-squared = 0.7234 for 55 degrees of freedom
# Reduced chi-squared = 0.7193 for 55 degrees of freedom
# Null hypothesis probability = 9.389144e-01
# Null hypothesis probability = 9.420643e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.114e-08 6.278e-09
25- 50 2.783e-08 1.471e-08
50-150 8.162e-08 6.934e-08
15-150 1.206e-07 8.080e-08
Plot creation:
Wed Jul 1 07:38:15 EDT 2020