batgrbproduct analysis for trigger=950330
batgrbproduct Analysis for Trigger=950330
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): Thu Jan 23 07:51:19 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger950330/GCN5_download_cron
======================================================================
Trigger: 00950330 Segment: 000
BAT Trigger Time: 601350084.672 [s; MET]
Trigger Stop: 601350085.184 [s; MET]
UTC: 2020-01-22T01:41:00.369360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 209.981071360137 Dec: 27.5655722784293 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.46
Image Trigger?: NO
Rate S/N Ratio: 20.0997512422418 [ if not an image trigger ]
Image S/N Ratio: 11.46
Flight Position: [ source = BAT ]
RA: 209.981071360137 Dec: 27.5655722784293 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 210.010589658009 Dec: 27.5472029945358 [deg; J2000]
{ 14h 00m 02.5s , +27d 32' 49.9" }
+/- 0.695413026366358 [arcmin] (estimated 90% radius based on SNR)
+/- 0.22382808955627 [arcmin] (formal 1-sigma fit error)
SNR: 51.1076342077245
Angular difference between Flight and Ground position is 1.918387 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 190.927999973297 +/- 3.90512477738901
Measured from: 1.72800004482269
to: 192.65600001812 [s; relative to TRIGTIME]
T50: 20.1679999828339 +/- 1.48858582639967
Measured from: 8.33600008487701
to: 28.5040000677109 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.1799999475479
to: 11.1799999475479 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.57200002670288
to: 229.075999975204 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.158157 6.383806 4.664164 1.117487
0.113247 0.118432 0.103122 0.085584 [error]
Peak 0.220292 0.384886 0.404650 0.118792
0.012474 0.015283 0.015013 0.010670 [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 1.65e-06 2.81e-06 3.65e-06 9.57e-06 1.07e-05 1.77e-05 erg/cm2
Error 8.19e-08 7.91e-08 1.11e-07 6.75e-07 2.68e-07 7.28e-07 erg/cm2
Peak flux Power-law 2.27e+00 2.84e+00 2.58e+00 4.08e+00 9.09e+00 1.18e+01 ph/cm2/s
Error 1.87e-01 1.42e-01 1.19e-01 4.01e-01 3.89e-01 5.16e-01 ph/cm2/s
Fluence Cutoff-PL 1.61e-06 2.83e-06 3.68e-06 8.39e-06 1.07e-05 1.65e-05 erg/cm2
Error 1.08e-07 8.36e-08 1.19e-07 1.68e-06 2.99e-07 1.69e-06 erg/cm2
Peak flux Cutoff-PL 2.07e+00 2.90e+00 2.69e+00 2.85e+00 8.96e+00 1.05e+01 ph/cm2/s
Error 2.37e-01 1.55e-01 1.50e-01 8.02e-01 4.02e-01 8.95e-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 1.623 0.048 - - 4.87e-03 1.18e-04 43.880 57
CPL 1.525 0.158 265.2 0.0 5.40e-03 0.00e+00 43.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.138 0.071 - - 7.80e-02 3.23e-03 44.700 57
CPL 0.774 0.297 190.7 247.8 1.14e-01 3.53e-02 39.950 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: 146.880000 sec.
T50 in the 50-300 keV band: 10.496000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 237.648 -8.572 229.076
T90 190.928 1.728 192.656
T50 20.168 8.336 28.504
Peak 1.000 10.180 11.180
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
210.0106 +27.5472 0.0038 31.0 -156.9 4.4076 51.1 TRIG_00950330
------------------------------------------
Foreground time interval of the image:
-8.572 8.029 (delta_t = 16.601 [sec])
Background time interval of the image:
-239.672 -181.712 (delta_t = 57.960 [sec])
-180.672 -41.661 (delta_t = 139.011 [sec])
-40.672 -8.572 (delta_t = 32.100 [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
-8.572000 25.047300
26.328000 229.076000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62345 ( -0.0475027 0.0475834 )
Norm@50keV : 4.86582E-03 ( -0.000117521 0.000117508 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.88 using 59 PHA bins.
# Reduced chi-squared = 0.7699 for 57 degrees of freedom
# Null hypothesis probability = 8.986775e-01
Photon flux (15-150 keV) in 236.4 sec: 0.629908 ( -0.0174997 0.0175752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07282e-05 ( -2.68007e-07 2.68274e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-8.572000 25.047300
26.328000 229.076000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52489 ( -0.190826 0.125318 )
Epeak [keV] : 265.169 ( )
Norm@50keV : 5.39524E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.06 using 59 PHA bins.
# Reduced chi-squared = 0.7689 for 56 degrees of freedom
# Null hypothesis probability = 8.976014e-01
Photon flux (15-150 keV) in 236.4 sec: 0.624407 ( -0.019994 0.010049 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0658e-05 ( -3.02781e-07 2.95216e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-8.572000 25.047300
26.328000 229.076000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.53615 ( 1.20802 1.20802 )
beta : -2.65554 ( 9.03491 18.7812 )
Epeak [keV] : 295.577 ( -107.548 -295.536 )
Norm@50keV : 5.32791E-03 ( -0.000128436 0.00072229 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.07 using 59 PHA bins.
# Reduced chi-squared = 0.7831 for 55 degrees of freedom
# Null hypothesis probability = 8.783894e-01
Photon flux (15-150 keV) in 236.4 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] : 15.9346 ( )
R^2/D10^2 : 5.30481E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 417.03 using 59 PHA bins.
# Reduced chi-squared = 7.3164 for 57 degrees of freedom
# Null hypothesis probability = 3.319117e-56
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.590e-07 3.191e-08
25- 50 2.763e-06 9.338e-08
50-150 4.896e-06 2.222e-07
15-150 8.319e-06 2.329e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 190.001 (-24.8165 -189.853)
Norm : 2.51157 (-0.0698742 0.0761426)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.95 using 59 PHA bins.
# Reduced chi-squared = 0.8413 for 57 degrees of freedom
# Null hypothesis probability = 7.976557e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.488e-06 7.506e-08
25- 50 2.845e-06 1.608e-07
50-150 6.140e-06 1.324e-06
15-150 1.047e-05 1.410e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.34087 (-0.6961 0.732878)
R1^2/D10^2 : 0.566761 (-0.158842 0.246779)
kT2 [keV] : 27.5705 (-2.46185 3.16539)
R2^2/D10^2 : 6.03279E-03 (-0.00195788 0.00251364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.93 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.678017e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.394e-06 1.279e-07
25- 50 2.883e-06 1.560e-07
50-150 6.216e-06 4.338e-07
15-150 1.049e-05 5.614e-07
Peak spectrum fit
Power-law model
Time interval is from 10.180 sec. to 11.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13810 ( -0.0716218 0.0712436 )
Norm@50keV : 7.80442E-02 ( -0.00323032 0.00322936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.70 using 59 PHA bins.
# Reduced chi-squared = 0.7843 for 57 degrees of freedom
# Null hypothesis probability = 8.815841e-01
Photon flux (15-150 keV) in 1 sec: 9.08896 ( -0.389097 0.389497 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.06325e-07 ( -3.63438e-08 3.64143e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.180 sec. to 11.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.773524 ( -0.306919 0.287337 )
Epeak [keV] : 190.654 ( -61.8697 433.758 )
Norm@50keV : 0.114221 ( -0.0289541 0.0415778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.95 using 59 PHA bins.
# Reduced chi-squared = 0.7134 for 56 degrees of freedom
# Null hypothesis probability = 9.481538e-01
Photon flux (15-150 keV) in 1 sec: 8.95727 ( -0.40191 0.40213 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.93881e-07 ( -3.835e-08 3.8173e-08 ) ergs/cm2
Band function
Time interval is from 10.180 sec. to 11.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.612735 ( -0.439587 2.35685 )
beta : -1.35545 ( 1.35528 0.200984 )
Epeak [keV] : 133.613 ( -97.7042 350.374 )
Norm@50keV : 0.140880 ( -0.0540768 7.66628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.67 using 59 PHA bins.
# Reduced chi-squared = 0.7213 for 55 degrees of freedom
# Null hypothesis probability = 9.405539e-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] : 20.1578 ( )
R^2/D10^2 : 0.419723 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.21 using 59 PHA bins.
# Reduced chi-squared = 2.2844 for 57 degrees of freedom
# Null hypothesis probability = 1.178358e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.277e-08 2.695e-09
25- 50 1.641e-07 9.650e-09
50-150 4.949e-07 3.350e-08
15-150 6.917e-07 3.285e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 37.6426 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 134.44 using 59 PHA bins.
# Reduced chi-squared = 2.3586 for 57 degrees of freedom
# Null hypothesis probability = 3.357456e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.373e-08 4.495e-09
25- 50 1.803e-07 7.950e-09
50-150 3.955e-07 1.825e-08
15-150 6.695e-07 3.330e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.68351 (-1.74562 2.03059)
R1^2/D10^2 : 3.39509 (-1.46941 3.29196)
kT2 [keV] : 32.2805 (-4.87693 9.20848)
R2^2/D10^2 : 7.51720E-02 (-0.0424169 0.0584695)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.64 using 59 PHA bins.
# Reduced chi-squared = 0.7753 for 55 degrees of freedom
# Null hypothesis probability = 8.878639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.057e-08 9.905e-09
25- 50 1.724e-07 2.380e-08
50-150 5.630e-07 9.610e-08
15-150 7.960e-07 1.225e-07
Plot creation:
Thu Jan 23 07:55:26 EST 2020