batgrbproduct analysis for trigger=1192745
batgrbproduct Analysis for Trigger=1192745
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): Wed Sep 27 12:51:13 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192745/GCN5_download_cron
======================================================================
Trigger: 01192745 Segment: 000
BAT Trigger Time: 717461664 [s; MET]
Trigger Stop: 717461728 [s; MET]
UTC: 2023-09-26T22:53:51.919020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.038099083726 Dec: -16.4505691885839 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 19.19
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.19
Flight Position: [ source = BAT ]
RA: 245.038099083726 Dec: -16.4505691885839 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.111628604653 Dec: -16.4246302396415 [deg; J2000]
{ 16h 20m 26.8s , -16d 25' 28.7" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 2.11270671678944 [arcmin] (formal 1-sigma fit error)
SNR: -5.17502129356795
Angular difference between Flight and Ground position is 4.508592 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 0.0119998455047607 +/- 0.004
Measured from: 55.0240001678467
to: 55.0360000133514 [s; relative to TRIGTIME]
T50: 0.00399994850158691 +/- 0.004
Measured from: 55.0280001163483
to: 55.0320000648499 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 54.5340000391006
to: 55.5340000391006 [s; relative to TRIGTIME]
Total Fluence
Measured from: 55.0240000486374
to: 55.039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.002447 -0.001149 -0.002563 -0.001234
0.001306 0.000698 0.000899 0.000584 [error]
Peak 0.077025 0.006294 -0.006015 0.006913
0.010323 0.008519 0.006952 0.005883 [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 0.00e+002.19e-102.14e-10 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 2.79e-10 8.51e-11 1.49e-10 1.07e-08 5.85e-10 1.08e-08 erg/cm2
Peak flux Power-law 7.34e-01 8.12e-02 3.76e-03 1.82e-04 8.19e-01 8.19e-01 ph/cm2/s
Error 1.77e-01 5.68e-02 6.83e-03 7.05e-04 2.14e-01 2.14e-01 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 1.87e-10 1.28e-10 2.12e-10 -------- 6.56e-10 2.21e-08 erg/cm2
Peak flux Cutoff-PL 8.24e-01 2.87e-02 2.98e-07 4.59e-19 8.52e-01 8.51e-01 ph/cm2/s
Error 2.04e-01 6.10e-02 4.10e-03 0.00e+00 2.05e-01 2.06e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error -------- 1.06e-10 -------- -------- -------- -------- 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 1.500 0.000 - - 0.00e+00 1.75e-03 28.920 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 28.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.431 1.213 - - 3.50e-04 5.14e-04 41.840 57
CPL 1.000 0.000 50.0 0.0 7.23e-03 0.00e+00 82.760 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.016 55.024 55.040
T90 0.012 55.024 55.036
T50 0.004 55.028 55.032
Peak 1.000 54.534 55.534
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1116 -16.4246 0.0372 16.3 -92.6 -0.0103 -5.2 TRIG_01192745
------------------------------------------
Foreground time interval of the image:
55.024 55.040 (delta_t = 0.016 [sec])
Background time interval of the image:
-119.000 55.024 (delta_t = 174.024 [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 55.024 sec. to 55.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00349569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.92 using 59 PHA bins.
# Reduced chi-squared = 0.5074 for 57 degrees of freedom
# Null hypothesis probability = 9.992858e-01
Photon flux (15-150 keV) in 0.016 sec: 0.0 ( 0 1.56799 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.1703e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 55.024 sec. to 55.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.92 using 59 PHA bins.
# Reduced chi-squared = 0.5165 for 56 degrees of freedom
# Null hypothesis probability = 9.989781e-01
Photon flux (15-150 keV) in 0.016 sec: 0.0 ( 0 1.56779 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.31275e-09 ) ergs/cm2
Band function
Time interval is from 55.024 sec. to 55.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31487 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 0.741274 ( -80 -80 )
Norm@50keV : 1.49154E+04 ( -14914.4 9.47633e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 27.51 using 59 PHA bins.
# Reduced chi-squared = 0.5001 for 55 degrees of freedom
# Null hypothesis probability = 9.992917e-01
Photon flux (15-150 keV) in 0.016 sec: 0.0 ( ) 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] : 0.250880 (-5 -5)
R^2/D10^2 : 1.00401E+22 (-1.10855e+22 -1.10855e+22)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 25.26 using 59 PHA bins.
# Reduced chi-squared = 0.4432 for 57 degrees of freedom
# Null hypothesis probability = 9.999154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 0.246316 (-0.0253101 2.15509)
Norm : 4.62967E+22 (-5.61768e+22 -5.61768e+22)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.266258 (-0.214166 1.27814)
R1^2/D10^2 : 8.64069E+20 (-8.64054e+20 -8.64057e+20)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 4.5488)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 54.534 sec. to 55.534 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.43097 ( -1.04684 1.37982 )
Norm@50keV : 3.50048E-04 ( -0.000349283 0.000679027 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.84 using 59 PHA bins.
# Reduced chi-squared = 0.7340 for 57 degrees of freedom
# Null hypothesis probability = 9.339957e-01
Photon flux (15-150 keV) in 1 sec: 0.819182 ( -0.212602 0.214463 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.54108e-08 ( -7.36591e-09 7.9443e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 54.534 sec. to 55.534 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.23325E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.76 using 59 PHA bins.
# Reduced chi-squared = 1.478 for 56 degrees of freedom
# Null hypothesis probability = 1.156622e-02
Photon flux (15-150 keV) in 1 sec: 0.851654 ( -0.206314 0.204276 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48796e-08 ( -6.3012e-09 6.7013e-09 ) ergs/cm2
Band function
Time interval is from 54.534 sec. to 55.534 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.98701 ( 0.400964 0.400964 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 11.4375 ( -2.32312 5.23279 )
Norm@50keV : 5770.08 ( -5770.39 373681 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7294 for 55 degrees of freedom
# Null hypothesis probability = 9.340781e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.61180 (-0.548785 0.673894)
R^2/D10^2 : 307.670 (-307.67 1402.51)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.306e-08 1.249e-08
25- 50 2.016e-09 1.279e-09
50-150 9.688e-13 1.188e-12
15-150 2.507e-08 1.378e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.92984 (-1.51409 2.30191)
Norm : 204.095 (-204.093 670.167)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.241e-08 1.323e-08
25- 50 2.743e-09 1.682e-09
50-150 1.324e-11 1.539e-11
15-150 2.517e-08 1.422e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.33463E-04 (8.94563 -0.000233463)
R1^2/D10^2 : 906.334 (-906.334 -906.334)
kT2 [keV] : 2.61180 (-0.54879 0.673889)
R2^2/D10^2 : 307.666 (-307.666 1402.51)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.282e-08 1.073e-08
25- 50 2.374e-09 9.525e-10
50-150 2.266e-12 1.197e-13
15-150 2.520e-08 1.655e-08
Plot creation:
Wed Sep 27 12:53:34 EDT 2023