batgrbproduct analysis for trigger=1209644
batgrbproduct Analysis for Trigger=1209644
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 Jan 20 00:42:14 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1209644/GCN5_download_cron
======================================================================
Trigger: 01209644 Segment: 000
BAT Trigger Time: 727363176 [s; MET]
Trigger Stop: 727363256 [s; MET]
UTC: 2024-01-19T13:19:03.240700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 84.1299834550994 Dec: 22.1064347523534 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.29
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.29
Flight Position: [ source = BAT ]
RA: 84.1299834550994 Dec: 22.1064347523534 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 84.1178334919076 Dec: 22.1359615169238 [deg; J2000]
{ 05h 36m 28.3s , +22d 08' 09.5" }
+/- 1.40687829946548 [arcmin] (estimated 90% radius based on SNR)
+/- 0.505077285047703 [arcmin] (formal 1-sigma fit error)
SNR: 18.6776974356694
Angular difference between Flight and Ground position is 1.895960 arcmin
Partial Coding Fraction: 0.7265625 [ including projection effects ]
Duration
T90: 688.463999986649 +/- 20.4989756666153
Measured from: -45.7759999036789
to: 642.68800008297 [s; relative to TRIGTIME]
T50: 423.807999968529 +/- 15.3773139109558
Measured from: 107.176000118256
to: 530.984000086784 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -124.751999974251
to: -123.751999974251 [s; relative to TRIGTIME]
Total Fluence
Measured from: -135.575999975204
to: 692.320000052452 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.902428 9.226802 4.316376 0.811131
0.180601 0.184273 0.155434 0.129422 [error]
Peak 0.033489 0.027861 0.028112 0.013598
0.010561 0.010715 0.009382 0.007751 [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 3.32e-06 4.07e-06 3.61e-06 5.53e-06 1.29e-05 1.65e-05 erg/cm2
Error 1.78e-07 1.21e-07 1.68e-07 5.59e-07 3.84e-07 6.84e-07 erg/cm2
Peak flux Power-law 2.34e-01 1.81e-01 9.44e-02 7.11e-02 5.42e-01 5.81e-01 ph/cm2/s
Error 1.40e-01 8.38e-02 5.54e-02 8.14e-02 2.52e-01 2.67e-01 ph/cm2/s
Fluence Cutoff-PL 3.33e-06 4.07e-06 3.61e-06 5.46e-06 1.29e-05 1.65e-05 erg/cm2
Error 1.90e-07 1.20e-07 1.69e-07 1.03e-06 3.94e-07 1.14e-06 erg/cm2
Peak flux Cutoff-PL 2.00e-01 2.53e-01 9.35e-02 6.35e-03 5.53e-01 5.53e-01 ph/cm2/s
Error 1.52e-01 1.29e-01 9.07e-02 3.07e-02 2.49e-01 2.50e-01 ph/cm2/s
Fluence Band 3.16e-06 4.27e-06 3.43e-06 3.96e-06 1.24e-05 1.49e-05 erg/cm2
Error -------- -------- 3.38e-07 -------- -------- -------- 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 2.172 0.063 - - 2.13e-03 6.93e-05 54.740 57
CPL 1.995 -0.939 1.5 0.7 2.59e-03 1.24e-04 56.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.939 0.670 - - 3.71e-03 1.85e-03 59.320 57
CPL -0.395 5.591 42.2 -12.2 8.98e-02 0.00e+00 57.430 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: 0.320000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 827.896 -135.576 692.320
T90 688.464 -45.776 642.688
T50 423.808 107.176 530.984
Peak 1.000 -124.752 -123.752
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
84.1178 +22.1360 0.0103 30.4 -143.3 3.1244 18.7 TRIG_01209644
------------------------------------------
Foreground time interval of the image:
-14.699 32.000 (delta_t = 46.699 [sec])
42.000 60.950 (delta_t = 18.950 [sec])
61.000 72.230 (delta_t = 11.230 [sec])
73.000 73.838 (delta_t = 0.838 [sec])
82.000 88.201 (delta_t = 6.201 [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
Multiple GTIs in the spectrum
tstart tstop
-135.576000 -135.420000
-126.000000 -116.827700
-116.000000 -113.940000
-113.000000 -107.870000
-107.000000 -105.670000
-59.000000 -53.113500
-52.000000 32.000000
42.000000 60.950000
61.000300 72.230000
73.000000 73.838300
82.000000 120.390000
126.000000 127.278100
128.000000 162.860000
171.000000 173.150000
174.000000 195.140000
207.000000 241.710000
243.000000 243.126200
301.000000 316.360000
326.000000 344.840000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.17204 ( -0.0628551 0.0635793 )
Norm@50keV : 2.12536E-03 ( -6.95243e-05 6.91246e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.74 using 59 PHA bins.
# Reduced chi-squared = 0.9604 for 57 degrees of freedom
# Null hypothesis probability = 5.601898e-01
Photon flux (15-150 keV) in 649.1 sec: 0.346770 ( -0.0116892 0.0117688 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29222e-05 ( -3.84e-07 3.84837e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-135.576000 -135.420000
-126.000000 -116.827700
-116.000000 -113.940000
-113.000000 -107.870000
-107.000000 -105.670000
-59.000000 -53.113500
-52.000000 32.000000
42.000000 60.950000
61.000300 72.230000
73.000000 73.838300
82.000000 120.390000
126.000000 127.278100
128.000000 162.860000
171.000000 173.150000
174.000000 195.140000
207.000000 241.710000
243.000000 243.126200
301.000000 316.360000
326.000000 344.840000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99470 ( -0.117608 -1.9947 )
Epeak [keV] : 1.52680 ( -0.438054 0.952199 )
Norm@50keV : 2.58667E-03 ( -8.17015e-05 0.000165795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 56 degrees of freedom
# Null hypothesis probability = 4.410672e-01
Photon flux (15-150 keV) in 649.1 sec: 0.346893 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29203e-05 ( -4.12373e-07 3.76153e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-135.576000 -135.420000
-126.000000 -116.827700
-116.000000 -113.940000
-113.000000 -107.870000
-107.000000 -105.670000
-59.000000 -53.113500
-52.000000 32.000000
42.000000 60.950000
61.000300 72.230000
73.000000 73.838300
82.000000 120.390000
126.000000 127.278100
128.000000 162.860000
171.000000 173.150000
174.000000 195.140000
207.000000 241.710000
243.000000 243.126200
301.000000 316.360000
326.000000 344.840000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.75728 ( 1.58961 1.58961 )
beta : -2.20619 ( -0.200931 0.0856434 )
Epeak [keV] : 19.2968 ( -21.2736 8.79693 )
Norm@50keV : 3.88963E-03 ( -0.0010456 1316.71 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.11 using 59 PHA bins.
# Reduced chi-squared = 0.9838 for 55 degrees of freedom
# Null hypothesis probability = 5.085663e-01
Photon flux (15-150 keV) in 649.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24382e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6437 ( )
R^2/D10^2 : 0.110771 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 332.38 using 59 PHA bins.
# Reduced chi-squared = 5.8312 for 57 degrees of freedom
# Null hypothesis probability = 1.623122e-40
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.690e-06 9.996e-08
25- 50 4.576e-06 1.516e-07
50-150 2.853e-06 1.928e-07
15-150 9.119e-06 2.726e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.7886 (-5.36071 6.17158)
Norm : 1.69823 (-0.102852 0.111179)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.776e-06 1.405e-07
25- 50 4.242e-06 1.314e-07
50-150 4.879e-06 3.184e-07
15-150 1.190e-05 3.473e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.74372 (-0.609211 0.607737)
R1^2/D10^2 : 0.548718 (-0.149934 0.23988)
kT2 [keV] : 25.5150 (-3.78821 5.25463)
R2^2/D10^2 : 2.53909E-03 (-0.00122226 0.00216199)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.684e-06 2.210e-07
25- 50 4.237e-06 2.295e-07
50-150 5.545e-06 7.585e-07
15-150 1.247e-05 8.828e-07
Peak spectrum fit
Power-law model
Time interval is from -124.752 sec. to -123.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93896 ( -0.618215 0.721227 )
Norm@50keV : 3.71353E-03 ( -0.00188072 0.0018265 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.32 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.911286e-01
Photon flux (15-150 keV) in 1 sec: 0.542143 ( -0.25177 0.252868 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41433e-08 ( -1.6466e-08 1.68726e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -124.752 sec. to -123.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.395021 ( -8.52549 2.65712 )
Epeak [keV] : 42.1764 ( -17.2366 -41.7193 )
Norm@50keV : 8.97820E-02 ( -0.112486 -0.112486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.43 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.219570e-01
Photon flux (15-150 keV) in 1 sec: 0.552770 ( -0.246488 0.252314 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14444e-08 ( -1.6765e-08 1.84754e-08 ) ergs/cm2
Band function
Time interval is from -124.752 sec. to -123.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.90448 -5 )
beta : -2.59244 ( 2.593 0.920072 )
Epeak [keV] : 28.0563 ( -13.973 13.3071 )
Norm@50keV : 350.131 ( -145.514 9284.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 55 degrees of freedom
# Null hypothesis probability = 4.221823e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41833e-08 ( -3.41763e-08 -1.66738e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2108 (-3.89137 6.26409)
R^2/D10^2 : 0.274729 (-0.274729 1.40896)
(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 5.873e-09 3.869e-09
25- 50 1.503e-08 9.625e-09
50-150 8.333e-09 6.460e-09
15-150 2.924e-08 1.859e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 69.7030 (-44.0719 -69.703)
Norm : 2.86994 (-1.46366 2.58444)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.360e-09 4.902e-09
25- 50 1.170e-08 7.655e-09
50-150 1.498e-08 1.347e-08
15-150 3.403e-08 2.427e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.49558 (-7.49443 -7.49443)
R1^2/D10^2 : 0.615270 (-0.615745 -0.615745)
kT2 [keV] : 18.0589 (-18.0558 -18.0558)
R2^2/D10^2 : 1.50555E-02 (-0.0150731 1.40962)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.912e-09 5.110e-09
25- 50 1.379e-08 1.290e-08
50-150 1.273e-08 9.810e-09
15-150 3.344e-08 2.635e-08
Plot creation:
Sat Jan 20 00:45:30 EST 2024