batgrbproduct analysis for trigger=1002544
batgrbproduct Analysis for Trigger=1002544
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 v2.48
Process Start Time (local time): Thu Oct 29 14:47:18 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1002544/GCN5_download_cron
======================================================================
Trigger: 01002544 Segment: 000
BAT Trigger Time: 625553584 [s; MET]
Trigger Stop: 625553920 [s; MET]
UTC: 2020-10-28T04:52:38.118280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.921970324121 Dec: -15.7022280621029 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 21.42
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.42
Flight Position: [ source = BAT ]
RA: 244.921970324121 Dec: -15.7022280621029 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.963310038723 Dec: -15.6566172001371 [deg; J2000]
{ 16h 19m 51.2s , -15d 39' 23.8" }
+/- 1.77180131130804 [arcmin] (estimated 90% radius based on SNR)
+/- 0.812097900695896 [arcmin] (formal 1-sigma fit error)
SNR: 13.43506530366
Angular difference between Flight and Ground position is 3.632109 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 153.184000015259 +/- 89.800840604355
Measured from: 13.2600001096725
to: 166.444000124931 [s; relative to TRIGTIME]
T50: 95.4799998998642 +/- 65.2775532797666
Measured from: 51.0000001192093
to: 146.480000019073 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 242.628000020981
to: 243.628000020981 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.24399995803833
to: 248.003999948502 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.419372 0.799927 0.074416 -0.011915
0.115409 0.099889 0.084167 0.076058 [error]
Peak 0.094165 0.014205 -0.006287 -0.002485
0.008636 0.006746 0.005861 0.005333 [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 3.17e-06 3.83e-07 1.99e-08 1.08e-09 3.57e-06 3.57e-06 erg/cm2
Error 2.85e-07 5.08e-08 6.90e-09 6.51e-10 2.79e-07 2.79e-07 erg/cm2
Peak flux Power-law 1.08e+00 8.60e-02 2.61e-03 8.18e-05 1.16e+00 1.16e+00 ph/cm2/s
Error 2.04e-01 5.49e-02 4.63e-03 3.07e-04 2.30e-01 2.30e-01 ph/cm2/s
Fluence Cutoff-PL 3.15e-06 3.00e-07 1.06e-09 2.32e-14 3.45e-06 3.45e-06 erg/cm2
Error 3.08e-07 7.08e-08 4.33e-09 2.34e-11 3.08e-07 3.08e-07 erg/cm2
Peak flux Cutoff-PL 1.07e+00 8.36e-02 2.46e-03 7.52e-05 1.16e+00 1.16e+00 ph/cm2/s
Error 2.04e-01 5.11e-02 4.62e-03 3.07e-04 -------- 2.30e-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 6.267 0.320 - - 1.11e-04 3.14e-05 51.100 0
CPL 1.664 0.000 1.6 0.0 6.21e-01 0.00e+00 45.430 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 6.040 1.164 - - 2.72e-04 3.95e-04 65.280 0
CPL 1.767 0.000 1.0 0.0 1.41e+00 0.00e+00 66.460 0
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 248.248 -0.244 248.004
T90 153.184 13.260 166.444
T50 95.480 51.000 146.480
Peak 1.000 242.628 243.628
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9633 -15.6566 0.0144 25.3 -45.2 3.6087 13.4 TRIG_01002544
------------------------------------------
Foreground time interval of the image:
-0.244 70.170 (delta_t = 70.414 [sec])
72.000 183.065 (delta_t = 111.065 [sec])
203.000 208.040 (delta_t = 5.040 [sec])
210.000 218.040 (delta_t = 8.040 [sec])
233.000 235.060 (delta_t = 2.060 [sec])
236.000 237.960 (delta_t = 1.960 [sec])
242.000 243.560 (delta_t = 1.560 [sec])
245.000 245.460 (delta_t = 0.460 [sec])
247.000 248.004 (delta_t = 1.004 [sec])
Background time interval of the image:
-239.000 -164.730 (delta_t = 74.270 [sec])
-163.000 -159.020 (delta_t = 3.980 [sec])
-156.000 -155.940 (delta_t = 0.060 [sec])
-154.000 -150.870 (delta_t = 3.130 [sec])
-119.000 -99.610 (delta_t = 19.390 [sec])
-98.000 -0.244 (delta_t = 97.756 [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
-0.244000 70.170000
72.000000 183.065400
203.000000 208.040000
210.000000 218.040000
233.000000 235.060000
236.000000 237.960000
242.000000 243.560000
245.000000 245.460000
247.000000 248.004000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.26658 ( -0.319727 0.319506 )
Norm@50keV : 1.10869E-04 ( -2.76723e-05 3.50331e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.95e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 201.6 sec: 0.597098 ( -0.0510486 0.0514964 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57038e-06 ( -2.78037e-07 2.8027e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.244000 70.170000
72.000000 183.065400
203.000000 208.040000
210.000000 218.040000
233.000000 235.060000
236.000000 237.960000
242.000000 243.560000
245.000000 245.460000
247.000000 248.004000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66424 ( )
Epeak [keV] : 1.55198 ( )
Norm@50keV : 0.621100 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.43e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 201.6 sec: 0.580691 ( -0.056875 0.055967 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44976e-06 ( -3.11089e-07 3.05626e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.244000 70.170000
72.000000 183.065400
203.000000 208.040000
210.000000 218.040000
233.000000 235.060000
236.000000 237.960000
242.000000 243.560000
245.000000 245.460000
247.000000 248.004000
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.45639 ( -0.269904 0.83657 )
beta : -7.15067 ( 7.20215 0.841407 )
Epeak [keV] : 11.1533 ( -1.41824 3.48912 )
Norm@50keV : 1.67010E+04 ( -16729.5 282908 )
------------------------------------------------------------
Photon flux (15-150 keV) in 201.6 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] : 2.56084 (-0.143375 0.16043)
R^2/D10^2 : 235.251 (-94.0816 151.402)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.96e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.093e-06 4.939e-07
25- 50 2.503e-07 3.905e-08
50-150 9.981e-11 5.590e-11
15-150 3.343e-06 5.302e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.39965 (-0.354352 0.413922)
Norm : 217.976 (-75.3015 112.973)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.47 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.64e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.146e-06 3.941e-07
25- 50 2.933e-07 5.080e-08
50-150 7.650e-10 4.191e-10
15-150 3.440e-06 4.556e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.34085 (-1.32371 0.254892)
R1^2/D10^2 : 441.594 (-263.483 145672)
kT2 [keV] : 5.36916 (-4.17115 19.9227)
R2^2/D10^2 : 0.303113 (-0.369116 1.76778)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.47e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.390e-06 1.347e-06
25- 50 3.674e-07 2.036e-07
50-150 6.698e-10 4.937e-10
15-150 2.758e-06 1.523e-06
Peak spectrum fit
Power-law model
Time interval is from 242.628 sec. to 243.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.03971 ( -1.05261 1.27549 )
Norm@50keV : 2.71718E-04 ( -0.000271718 0.000518056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.28 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.11e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.932 sec: 1.16369 ( -0.230285 0.229589 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25103e-08 ( -7.06745e-09 7.22963e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 242.628 sec. to 243.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76710 ( )
Epeak [keV] : 1.01773 ( )
Norm@50keV : 1.40548 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.60e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.932 sec: 1.16091 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24518e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from 242.628 sec. to 243.560 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.23997 ( 7.01351 9.23997 )
beta : -6.10362 ( -1.21962 1.11093 )
Epeak [keV] : 317.125 ( -317.125 -317.125 )
Norm@50keV : 3.42027E-02 ( -0.0349296 0.0726458 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.932 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] : 2.23455 (-0.430613 0.564205)
R^2/D10^2 : 1354.95 (-1381.22 6943.11)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.62 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.59e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.943e-08 1.621e-08
25- 50 1.343e-09 8.863e-10
50-150 1.323e-13 1.678e-13
15-150 3.077e-08 1.741e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.02017 (-1.10431 1.72316)
Norm : 637.991 (-638.979 2361.36)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.81e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.927e-08 1.591e-08
25- 50 2.161e-09 1.374e-09
50-150 3.287e-12 3.867e-12
15-150 3.143e-08 1.768e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.86497 (-2.15047 5.73128)
R1^2/D10^2 : 4.17762 (-4.43641 41.5536)
kT2 [keV] : 1.69984 (-0.928297 0.679972)
R2^2/D10^2 : 1.06352E+04 (-11751.9 1.2311e+08)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.82e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.810e-08 1.296e-08
25- 50 5.394e-09 3.095e-09
50-150 1.838e-10 1.535e-10
15-150 3.368e-08 1.407e-08
Plot creation:
Thu Oct 29 14:49:42 EDT 2020