batgrbproduct analysis for trigger=1209403
batgrbproduct Analysis for Trigger=1209403
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 Jan 18 09:58:07 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1209403/GCN5_download_cron
======================================================================
Trigger: 01209403 Segment: 000
BAT Trigger Time: 727202120 [s; MET]
Trigger Stop: 727202192 [s; MET]
UTC: 2024-01-17T16:34:47.251740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.4599774478261 Dec: 22.2873325073766 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.58
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.58
Flight Position: [ source = BAT ]
RA: 83.4599774478261 Dec: 22.2873325073766 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.466238173192 Dec: 22.288008842079 [deg; J2000]
{ 05h 33m 51.9s , +22d 17' 16.8" }
+/- 1.51343310954041 [arcmin] (estimated 90% radius based on SNR)
+/- 0.721329677913294 [arcmin] (formal 1-sigma fit error)
SNR: 16.8278274512845
Angular difference between Flight and Ground position is 0.349941 arcmin
Partial Coding Fraction: 0.859375 [ including projection effects ]
Duration
T90: 72 +/-
Measured from: 0
to: 72 [s; relative to TRIGTIME]
T50: 72 +/-
Measured from: 0
to: 72 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 72 second)
Measured from: 0
to: 72 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 72 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.132906 1.059930 0.487114 0.040969
0.057732 0.058942 0.050259 0.043609 [error]
Peak 1.132906 1.059930 0.487114 0.040969
0.057732 0.058942 0.050259 0.043609 [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 3.41e-07 4.19e-07 3.73e-07 5.75e-07 1.33e-06 1.71e-06 erg/cm2
Error 3.33e-08 2.81e-08 4.76e-08 1.46e-07 1.06e-07 1.97e-07 erg/cm2
Peak flux Power-law 1.55e-01 1.05e-01 4.70e-02 2.90e-02 3.22e-01 3.36e-01 ph/cm2/s
Error 1.55e-02 6.99e-03 5.77e-03 6.85e-03 2.15e-02 2.22e-02 ph/cm2/s
Fluence Cutoff-PL 3.34e-07 4.30e-07 3.67e-07 3.63e-07 1.30e-06 1.49e-06 erg/cm2
Error 3.69e-08 3.63e-08 5.25e-08 2.85e-07 1.30e-07 3.32e-07 erg/cm2
Peak flux Cutoff-PL 1.51e-01 1.08e-01 4.65e-02 2.02e-02 3.18e-01 3.26e-01 ph/cm2/s
Error 1.75e-02 8.90e-03 6.19e-03 1.32e-02 2.31e-02 2.86e-02 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 2.166 0.141 - - 1.98e-03 1.78e-04 44.680 57
CPL 1.932 0.332 11.8 -0.9 2.71e-03 0.00e+00 44.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.166 0.141 - - 1.98e-03 1.78e-04 44.680 57
CPL 1.932 0.332 11.8 -0.9 2.71e-03 0.00e+00 44.110 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 72.000 0.000 72.000
T90 72.000 0.000 72.000
T50 72.000 0.000 72.000
Peak 72.000 0.000 72.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.4662 +22.2880 0.0114 15.3 53.7 2.6195 16.8 TRIG_01209403
------------------------------------------
Foreground time interval of the image:
0.000 72.000 (delta_t = 72.000 [sec])
Background time interval of the image:
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 0.000 sec. to 72.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16617 ( -0.137784 0.143344 )
Norm@50keV : 1.97731E-03 ( -0.000179985 0.000177001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.7839 for 57 degrees of freedom
# Null hypothesis probability = 8.821225e-01
Photon flux (15-150 keV) in 72 sec: 0.321639 ( -0.0214776 0.0214959 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33252e-06 ( -1.04705e-07 1.06455e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93196 ( -0.596135 0.0672994 )
Epeak [keV] : 11.8384 ( -10.0633 -11.8439 )
Norm@50keV : 2.70564E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.11 using 59 PHA bins.
# Reduced chi-squared = 0.7876 for 56 degrees of freedom
# Null hypothesis probability = 8.750855e-01
Photon flux (15-150 keV) in 72 sec: 0.317547 ( -0.023197 0.023023 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29615e-06 ( -1.29614e-07 1.30226e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06147 ( 1.06056 1.06056 )
beta : -2.26185 ( 2.26031 0.196695 )
Epeak [keV] : 24.0542 ( -23.6965 12.4564 )
Norm@50keV : 1.17348E-02 ( -0.0135903 1859.23 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.49 using 59 PHA bins.
# Reduced chi-squared = 0.7907 for 55 degrees of freedom
# Null hypothesis probability = 8.686728e-01
Photon flux (15-150 keV) in 72 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] : 8.92304 (-0.739019 0.810262)
R^2/D10^2 : 0.218432 (-0.0637445 0.0902864)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.43 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 57 degrees of freedom
# Null hypothesis probability = 2.078920e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.427e-07 2.729e-08
25- 50 5.090e-07 3.852e-08
50-150 1.891e-07 4.014e-08
15-150 9.408e-07 7.524e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.8723 (-9.5454 13.3012)
Norm : 1.75356 (-0.20788 0.257972)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.112e-07 3.056e-08
25- 50 4.528e-07 3.280e-08
50-150 4.549e-07 8.086e-08
15-150 1.219e-06 1.048e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31501 (-0.942322 1.01297)
R1^2/D10^2 : 1.28549 (-0.619044 1.52731)
kT2 [keV] : 18.3355 (-3.79071 6.25383)
R2^2/D10^2 : 9.04798E-03 (-0.00618137 0.0146766)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.292e-07 8.928e-08
25- 50 4.206e-07 1.027e-07
50-150 5.127e-07 2.720e-07
15-150 1.263e-06 3.626e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16617 ( -0.137784 0.143344 )
Norm@50keV : 1.97731E-03 ( -0.000179985 0.000177001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.7839 for 57 degrees of freedom
# Null hypothesis probability = 8.821225e-01
Photon flux (15-150 keV) in 72 sec: 0.321639 ( -0.0214776 0.0214959 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33252e-06 ( -1.04705e-07 1.06455e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93196 ( -0.596135 0.0672994 )
Epeak [keV] : 11.8384 ( -10.0633 -11.8439 )
Norm@50keV : 2.70564E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.11 using 59 PHA bins.
# Reduced chi-squared = 0.7876 for 56 degrees of freedom
# Null hypothesis probability = 8.750855e-01
Photon flux (15-150 keV) in 72 sec: 0.317547 ( -0.023197 0.023023 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29615e-06 ( -1.29614e-07 1.30147e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06147 ( 1.06056 1.06056 )
beta : -2.26185 ( 2.26031 0.196695 )
Epeak [keV] : 24.0542 ( -23.6965 12.4564 )
Norm@50keV : 1.17348E-02 ( -0.0135903 2354.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.49 using 59 PHA bins.
# Reduced chi-squared = 0.7907 for 55 degrees of freedom
# Null hypothesis probability = 8.686728e-01
Photon flux (15-150 keV) in 72 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] : 8.92304 (-0.739019 0.810262)
R^2/D10^2 : 0.218432 (-0.0637445 0.0902864)
(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 2.427e-07 2.815e-08
25- 50 5.090e-07 4.208e-08
50-150 1.891e-07 3.946e-08
15-150 9.408e-07 7.704e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.8723 (-9.5454 13.3012)
Norm : 1.75356 (-0.20788 0.257972)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.112e-07 2.801e-08
25- 50 4.528e-07 3.085e-08
50-150 4.549e-07 7.970e-08
15-150 1.219e-06 1.076e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31501 (-0.942322 1.01297)
R1^2/D10^2 : 1.28549 (-0.619044 1.52731)
kT2 [keV] : 18.3355 (-3.79071 6.25383)
R2^2/D10^2 : 9.04798E-03 (-0.00618137 0.0146766)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.292e-07 8.100e-08
25- 50 4.206e-07 9.454e-08
50-150 5.127e-07 2.317e-07
15-150 1.263e-06 3.934e-07
Plot creation:
Thu Jan 18 10:00:04 EST 2024