batgrbproduct analysis for trigger=953689
batgrbproduct Analysis for Trigger=953689
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): Sun Feb 2 18:11:14 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger953689/batgroup_hand_proc
======================================================================
Trigger: 00953689 Segment: 000
BAT Trigger Time: 602203300.352 [s; MET]
Trigger Stop: 602203301.376 [s; MET]
UTC: 2020-01-31T22:41:15.994140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 3.09544610319421 Dec: 51.123636218354 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 25.71
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 25.71
Flight Position: [ source = BAT ]
RA: 3.09544610319421 Dec: 51.123636218354 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 3.08896063329656 Dec: 51.1248794315466 [deg; J2000]
{ 00h 12m 21.4s , +51d 07' 29.6" }
+/- 0.471357605653274 [arcmin] (estimated 90% radius based on SNR)
+/- 0.13757409379494 [arcmin] (formal 1-sigma fit error)
SNR: 89.0759567170242
Angular difference between Flight and Ground position is 0.255367 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 32.7399998903275 +/- 0.879054111945978
Measured from: -1.96399998664856
to: 30.7759999036789 [s; relative to TRIGTIME]
T50: 1.7279999256134 +/- 0.0509117071272196
Measured from: -0.547999978065491
to: 1.17999994754791 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0160000324249268
to: 1.01600003242493 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.45200002193451
to: 46.555999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.440416 3.793163 3.287559 0.869917
0.047341 0.051926 0.047015 0.036720 [error]
Peak 0.619115 1.194116 1.211314 0.341292
0.013797 0.018504 0.019321 0.012540 [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 7.61e-07 1.56e-06 2.51e-06 9.01e-06 6.96e-06 1.39e-05 erg/cm2
Error 3.14e-08 3.74e-08 5.20e-08 4.47e-07 1.32e-07 4.63e-07 erg/cm2
Peak flux Power-law 6.40e+00 8.27e+00 7.81e+00 1.30e+01 2.69e+01 3.55e+01 ph/cm2/s
Error 2.73e-01 2.14e-01 1.66e-01 6.02e-01 5.69e-01 7.39e-01 ph/cm2/s
Fluence Cutoff-PL 7.30e-07 1.57e-06 2.55e-06 7.59e-06 6.92e-06 1.24e-05 erg/cm2
Error 4.20e-08 3.85e-08 6.31e-08 1.27e-06 1.41e-07 1.27e-06 erg/cm2
Peak flux Cutoff-PL 5.56e+00 8.38e+00 8.28e+00 8.80e+00 2.63e+01 3.10e+01 ph/cm2/s
Error 3.60e-01 2.26e-01 2.22e-01 1.07e+00 5.94e-01 1.25e+00 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 1.317 0.035 - - 1.41e-02 2.66e-04 41.540 57
CPL 1.174 0.108 345.3 3077.6 1.62e-02 2.15e-03 38.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.082 0.035 - - 2.32e-01 4.71e-03 77.030 57
CPL 0.616 0.153 179.6 42.6 3.64e-01 5.28e-02 47.390 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: 3.200000 sec.
T50 in the 50-300 keV band: 1.536000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 50.008 -3.452 46.556
T90 32.740 -1.964 30.776
T50 1.728 -0.548 1.180
Peak 1.000 0.016 1.016
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
3.0890 +51.1249 0.0021 23.2 -16.4 9.8400 89.1 TRIG_00953689
------------------------------------------
Foreground time interval of the image:
-3.452 13.549 (delta_t = 17.001 [sec])
Background time interval of the image:
-239.352 -3.452 (delta_t = 235.900 [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 -3.452 sec. to 46.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31673 ( -0.0355177 0.0354262 )
Norm@50keV : 1.41466E-02 ( -0.000266564 0.00026635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.54 using 59 PHA bins.
# Reduced chi-squared = 0.7287 for 57 degrees of freedom
# Null hypothesis probability = 9.382994e-01
Photon flux (15-150 keV) in 50.01 sec: 1.69304 ( -0.0359947 0.0361035 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.96299e-06 ( -1.32169e-07 1.32226e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.452 sec. to 46.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17420 ( -0.145032 0.0718277 )
Epeak [keV] : 345.283 ( -142.799 6012.45 )
Norm@50keV : 1.62485E-02 ( -0.00191024 0.00239286 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.56 using 59 PHA bins.
# Reduced chi-squared = 0.6886 for 56 degrees of freedom
# Null hypothesis probability = 9.635905e-01
Photon flux (15-150 keV) in 50.01 sec: 1.67403 ( -0.04005 0.04025 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.91628e-06 ( -1.41378e-07 1.41178e-07 ) ergs/cm2
Band function
Time interval is from -3.452 sec. to 46.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.282365 ( -0.899576 5.06709 )
beta : -1.35220 ( 1.3522 0.0481052 )
Epeak [keV] : 54.8413 ( -25.9522 217.507 )
Norm@50keV : 6.28824E-02 ( -0.0382201 427.284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.74 using 59 PHA bins.
# Reduced chi-squared = 0.6681 for 55 degrees of freedom
# Null hypothesis probability = 9.723489e-01
Photon flux (15-150 keV) in 50.01 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] : 19.9793 ( )
R^2/D10^2 : 7.33091E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 565.51 using 59 PHA bins.
# Reduced chi-squared = 9.9213 for 57 degrees of freedom
# Null hypothesis probability = 7.937519e-85
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.822e-07 1.080e-08
25- 50 1.405e-06 4.101e-08
50-150 4.157e-06 1.263e-07
15-150 5.844e-06 1.175e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 7.26127 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 211.62 using 59 PHA bins.
# Reduced chi-squared = 3.7127 for 57 degrees of freedom
# Null hypothesis probability = 1.234488e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.042e-07 1.900e-08
25- 50 1.739e-06 3.651e-08
50-150 3.815e-06 8.427e-08
15-150 6.459e-06 1.375e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.32109 (-0.646458 0.692945)
R1^2/D10^2 : 0.842346 (-0.191269 0.26281)
kT2 [keV] : 32.4858 (-2.29021 2.88684)
R2^2/D10^2 : 1.20576E-02 (-0.00301134 0.00347368)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.74 using 59 PHA bins.
# Reduced chi-squared = 0.8134 for 55 degrees of freedom
# Null hypothesis probability = 8.370243e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.369e-07 5.176e-08
25- 50 1.618e-06 6.251e-08
50-150 4.639e-06 2.028e-07
15-150 6.893e-06 2.225e-07
Peak spectrum fit
Power-law model
Time interval is from 0.016 sec. to 1.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08205 ( -0.0352279 0.03513 )
Norm@50keV : 0.231958 ( -0.00471095 0.00470679 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.03 using 59 PHA bins.
# Reduced chi-squared = 1.351 for 57 degrees of freedom
# Null hypothesis probability = 3.974082e-02
Photon flux (15-150 keV) in 1 sec: 26.8607 ( -0.568762 0.569426 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43924e-06 ( -5.13344e-08 5.13834e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 1.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.616035 ( -0.155305 0.150435 )
Epeak [keV] : 179.645 ( -29.9506 55.2922 )
Norm@50keV : 0.364430 ( -0.0482879 0.0573724 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.39 using 59 PHA bins.
# Reduced chi-squared = 0.8463 for 56 degrees of freedom
# Null hypothesis probability = 7.867278e-01
Photon flux (15-150 keV) in 1 sec: 26.2596 ( -0.5931 0.5944 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40504e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.016 sec. to 1.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.158891 ( -0.588404 0.881715 )
beta : -1.27204 ( 1.27044 0.089229 )
Epeak [keV] : 95.8001 ( -34.9921 126.88 )
Norm@50keV : 0.662465 ( -0.359987 1.70763 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.54 using 59 PHA bins.
# Reduced chi-squared = 0.8462 for 55 degrees of freedom
# Null hypothesis probability = 7.845830e-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] : 21.9606 ( )
R^2/D10^2 : 0.959300 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 361.21 using 59 PHA bins.
# Reduced chi-squared = 6.3370 for 57 degrees of freedom
# Null hypothesis probability = 8.658698e-46
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.569e-08 3.665e-09
25- 50 4.526e-07 1.320e-08
50-150 1.631e-06 4.900e-08
15-150 2.169e-06 5.200e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 113.468 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 577.74 using 59 PHA bins.
# Reduced chi-squared = 10.136 for 57 degrees of freedom
# Null hypothesis probability = 3.163689e-87
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.825e-07 5.900e-09
25- 50 5.435e-07 1.255e-08
50-150 1.192e-06 2.450e-08
15-150 2.018e-06 4.650e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.84307 (-0.979873 1.05151)
R1^2/D10^2 : 6.39481 (-1.49642 2.16833)
kT2 [keV] : 35.1741 (-3.0203 4.14676)
R2^2/D10^2 : 0.173286 (-0.053912 0.0629848)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8246 for 55 degrees of freedom
# Null hypothesis probability = 8.200250e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.557e-07 1.250e-08
25- 50 5.032e-07 2.535e-08
50-150 1.752e-06 9.550e-08
15-150 2.411e-06 1.160e-07
Plot creation:
Sun Feb 2 18:14:49 EST 2020