batgrbproduct analysis for trigger=1202614
batgrbproduct Analysis for Trigger=1202614
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): Sat Dec 16 04:56:20 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1202614/GCN5_download_cron
======================================================================
Trigger: 01202614 Segment: 000
BAT Trigger Time: 724377728 [s; MET]
Trigger Stop: 724377856 [s; MET]
UTC: 2023-12-16T00:01:35.445560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.133276442428 Dec: -15.4683115050855 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.96
Flight Position: [ source = BAT ]
RA: 245.133276442428 Dec: -15.4683115050855 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.130627575148 Dec: -15.4717165581943 [deg; J2000]
{ 16h 20m 31.4s , -15d 28' 18.2" }
+/- 2.39232547280762 [arcmin] (estimated 90% radius based on SNR)
+/- 0.876930053987967 [arcmin] (formal 1-sigma fit error)
SNR: 8.74876142159377
Angular difference between Flight and Ground position is 0.255347 arcmin
Partial Coding Fraction: 0.2167969 [ including projection effects ]
Duration
T90: 128 +/-
Measured from: 0
to: 128 [s; relative to TRIGTIME]
T50: 128 +/-
Measured from: 0
to: 128 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 128 second)
Measured from: 0
to: 128 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 128 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.126234 0.346306 0.158644 0.032381
0.164495 0.154811 0.129761 0.113127 [error]
Peak 3.126234 0.346306 0.158644 0.032381
0.164495 0.154811 0.129761 0.113127 [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 1.14e-06 1.50e-07 8.70e-09 5.33e-10 1.30e-06 1.30e-06 erg/cm2
Error 1.55e-07 6.28e-08 8.94e-09 1.11e-09 1.82e-07 1.82e-07 erg/cm2
Peak flux Power-law 3.14e-01 2.42e-02 7.03e-04 2.10e-05 3.39e-01 3.39e-01 ph/cm2/s
Error 4.35e-02 9.68e-03 7.04e-04 4.22e-05 4.58e-02 4.58e-02 ph/cm2/s
Fluence Cutoff-PL 1.15e-06 1.46e-07 7.81e-09 3.76e-10 1.28e-06 1.29e-06 erg/cm2
Error 1.64e-07 6.48e-08 1.02e-08 1.05e-09 1.86e-07 1.91e-07 erg/cm2
Peak flux Cutoff-PL 3.18e-01 2.02e-02 1.36e-04 7.31e-08 3.38e-01 3.38e-01 ph/cm2/s
Error 4.54e-02 1.42e-02 8.37e-04 3.98e-05 4.57e-02 4.57e-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 6.107 0.772 - - 7.40e-05 6.10e-05 58.200 57
CPL 1.000 0.000 50.0 0.0 2.76e-03 0.00e+00 166.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 6.107 0.772 - - 7.40e-05 6.10e-05 58.200 57
CPL 1.000 0.000 50.0 0.0 2.76e-03 0.00e+00 166.570 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 128.000 0.000 128.000
T90 128.000 0.000 128.000
T50 128.000 0.000 128.000
Peak 128.000 0.000 128.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1306 -15.4717 0.0221 39.2 -120.7 4.2616 8.7 TRIG_01202614
------------------------------------------
Foreground time interval of the image:
0.000 128.000 (delta_t = 128.000 [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 128.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.10676 ( -0.740111 0.803991 )
Norm@50keV : 7.39649E-05 ( -4.23769e-05 7.96792e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.20 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.310077e-01
Photon flux (15-150 keV) in 128 sec: 0.338895 ( -0.0458072 0.0458073 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29612e-06 ( -1.80989e-07 1.82021e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.76036E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 166.57 using 59 PHA bins.
# Reduced chi-squared = 2.9745 for 56 degrees of freedom
# Null hypothesis probability = 6.521434e-13
Photon flux (15-150 keV) in 128 sec: 0.337978 ( -0.045727 0.04572 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28101e-06 ( -1.83046e-07 1.87994e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.44352 ( 4.54091 7.44352 )
beta : -6.23495 ( -0.702125 0.861365 )
Epeak [keV] : 518.596 ( -518.596 -518.596 )
Norm@50keV : 8.78888E-03 ( -0.00481334 0.0119467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.28 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.558444e-01
Photon flux (15-150 keV) in 128 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] : 2.35136 (-0.295427 0.353265)
R^2/D10^2 : 265.744 (-175.076 536.298)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.37 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 57 degrees of freedom
# Null hypothesis probability = 3.892271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.181e-06 5.539e-07
25- 50 6.732e-08 4.056e-08
50-150 1.144e-11 1.175e-11
15-150 1.248e-06 5.985e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.12566 (-0.7468 0.990699)
Norm : 166.248 (-97.3695 259.356)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.170e-06 5.151e-07
25- 50 9.255e-08 4.523e-08
50-150 1.652e-10 1.619e-10
15-150 1.263e-06 5.406e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.32293 (-0.292507 0.346818)
R1^2/D10^2 : 290.198 (-145.423 500.241)
kT2 [keV] : 49.5105 (-34.2664 -50.9581)
R2^2/D10^2 : 1.26424E-04 (-0.000120051 0.00226445)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.179e-06 6.390e-07
25- 50 9.501e-08 4.342e-08
50-150 3.809e-07 2.632e-07
15-150 1.655e-06 7.153e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.10676 ( -0.740111 0.803991 )
Norm@50keV : 7.39649E-05 ( -4.23769e-05 7.96792e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.20 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.310077e-01
Photon flux (15-150 keV) in 128 sec: 0.338895 ( -0.0458072 0.0458073 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29612e-06 ( -1.80989e-07 1.82021e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.76036E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 166.57 using 59 PHA bins.
# Reduced chi-squared = 2.9745 for 56 degrees of freedom
# Null hypothesis probability = 6.521434e-13
Photon flux (15-150 keV) in 128 sec: 0.337978 ( -0.045727 0.04572 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28101e-06 ( -1.83046e-07 1.87994e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.44352 ( 4.54091 7.44352 )
beta : -6.23495 ( -0.702125 0.861365 )
Epeak [keV] : 518.596 ( -518.596 -518.596 )
Norm@50keV : 8.78888E-03 ( -0.00481334 0.0119467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.28 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.558444e-01
Photon flux (15-150 keV) in 128 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] : 2.35136 (-0.295427 0.353265)
R^2/D10^2 : 265.744 (-175.076 536.298)
(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 1.181e-06 6.318e-07
25- 50 6.732e-08 4.051e-08
50-150 1.144e-11 1.200e-11
15-150 1.248e-06 6.402e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.12566 (-0.7468 0.990699)
Norm : 166.248 (-97.3695 259.356)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.170e-06 4.767e-07
25- 50 9.255e-08 4.421e-08
50-150 1.652e-10 1.656e-10
15-150 1.263e-06 6.785e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.32293 (-0.292507 0.346818)
R1^2/D10^2 : 290.198 (-145.423 500.241)
kT2 [keV] : 49.5105 (-34.2682 -50.9581)
R2^2/D10^2 : 1.26424E-04 (-0.000120051 0.00226445)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.179e-06 5.419e-07
25- 50 9.501e-08 4.259e-08
50-150 3.809e-07 2.603e-07
15-150 1.655e-06 7.336e-07
Plot creation:
Sat Dec 16 04:59:36 EST 2023