batgrbproduct analysis for trigger=1202386
batgrbproduct Analysis for Trigger=1202386
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): Fri Dec 15 16:02:26 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1202386/GCN5_download_cron
======================================================================
Trigger: 01202386 Segment: 000
BAT Trigger Time: 724278300.864 [s; MET]
Trigger Stop: 724278301.888 [s; MET]
UTC: 2023-12-14T20:24:28.316360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 305.736484932457 Dec: -72.4361154998792 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.02
Image Trigger?: NO
Rate S/N Ratio: 27.9642629082191 [ if not an image trigger ]
Image S/N Ratio: 16.02
Flight Position: [ source = BAT ]
RA: 305.736484932457 Dec: -72.4361154998792 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 305.665583906752 Dec: -72.4317479584401 [deg; J2000]
{ 20h 22m 39.7s , -72d 25' 54.3" }
+/- 1.06240746341777 [arcmin] (estimated 90% radius based on SNR)
+/- 0.358693179947886 [arcmin] (formal 1-sigma fit error)
SNR: 27.8971377695662
Angular difference between Flight and Ground position is 1.310369 arcmin
Partial Coding Fraction: 0.390625 [ including projection effects ]
Duration
T90: 27.8079999685287 +/- 7.26183453882648
Measured from: -2.3879998922348
to: 25.4200000762939 [s; relative to TRIGTIME]
T50: 13.8159999847412 +/- 0.545618874514393
Measured from: 2.27600014209747
to: 16.0920001268387 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.5720000267029
to: 13.5720000267029 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.36799991130829
to: 49.4200000762939 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.799656 4.954676 4.610457 1.431914
0.110972 0.129598 0.122677 0.105609 [error]
Peak 0.227685 0.431558 0.585345 0.155230
0.019856 0.025304 0.026128 0.019625 [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 9.91e-07 2.12e-06 3.57e-06 1.37e-05 9.80e-06 2.04e-05 erg/cm2
Error 6.01e-08 7.60e-08 1.24e-07 1.08e-06 3.14e-07 1.15e-06 erg/cm2
Peak flux Power-law 2.27e+00 3.29e+00 3.55e+00 7.15e+00 1.13e+01 1.63e+01 ph/cm2/s
Error 2.62e-01 2.33e-01 2.00e-01 8.70e-01 6.30e-01 9.84e-01 ph/cm2/s
Fluence Cutoff-PL 9.03e-07 2.17e-06 3.70e-06 8.45e-06 9.61e-06 1.52e-05 erg/cm2
Error 7.68e-08 8.39e-08 1.47e-07 2.30e-06 3.38e-07 2.29e-06 erg/cm2
Peak flux Cutoff-PL 2.08e+00 3.33e+00 3.70e+00 5.41e+00 1.12e+01 1.45e+01 ph/cm2/s
Error 3.37e-01 2.47e-01 2.66e-01 1.63e+00 6.41e-01 1.90e+00 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 1.251 0.054 - - 1.79e-02 5.37e-04 69.340 57
CPL 0.869 0.229 166.8 94.3 2.66e-02 6.25e-03 60.530 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.890 0.093 - - 9.86e-02 5.48e-03 68.280 57
CPL 0.588 0.329 283.6 0.0 1.33e-01 0.00e+00 66.210 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: 20.352000 sec.
T50 in the 50-300 keV band: 13.696000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 54.788 -5.368 49.420
T90 27.808 -2.388 25.420
T50 13.816 2.276 16.092
Peak 1.000 12.572 13.572
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
305.6656 -72.4317 0.0068 34.8 -124.6 5.6596 27.9 TRIG_01202386
------------------------------------------
Foreground time interval of the image:
-5.368 12.237 (delta_t = 17.605 [sec])
Background time interval of the image:
-60.864 -5.368 (delta_t = 55.496 [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 -5.368 sec. to 49.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25110 ( -0.0538422 0.0536419 )
Norm@50keV : 1.78813E-02 ( -0.00053724 0.00053711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.34 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.264983e-01
Photon flux (15-150 keV) in 54.79 sec: 2.11523 ( -0.0676787 0.067835 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.8021e-06 ( -3.13725e-07 3.14168e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.368 sec. to 49.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.868749 ( -0.235181 0.223272 )
Epeak [keV] : 166.822 ( -42.6006 146.08 )
Norm@50keV : 2.65917E-02 ( -0.00537745 0.0071242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.53 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 56 degrees of freedom
# Null hypothesis probability = 3.155986e-01
Photon flux (15-150 keV) in 54.79 sec: 2.07114 ( -0.07189 0.07208 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.60814e-06 ( -3.38657e-07 3.37287e-07 ) ergs/cm2
Band function
Time interval is from -5.368 sec. to 49.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.744699 ( -0.289996 1.35122 )
beta : -1.52736 ( 1.52728 0.225759 )
Epeak [keV] : 130.927 ( -82.4453 112.338 )
Norm@50keV : 3.09481E-02 ( -0.00837107 0.0642191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.22 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 55 degrees of freedom
# Null hypothesis probability = 3.241748e-01
Photon flux (15-150 keV) in 54.79 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] : 19.0518 ( )
R^2/D10^2 : 0.112318 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 226.04 using 59 PHA bins.
# Reduced chi-squared = 3.9656 for 57 degrees of freedom
# Null hypothesis probability = 5.483228e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.386e-07 2.737e-08
25- 50 2.114e-06 8.712e-08
50-150 5.642e-06 2.844e-07
15-150 8.194e-06 2.986e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 8.94232 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.220e-06 3.945e-08
25- 50 2.347e-06 7.835e-08
50-150 5.147e-06 1.592e-07
15-150 8.714e-06 2.931e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.70866 (-1.26035 1.43443)
R1^2/D10^2 : 0.842199 (-0.288593 0.505446)
kT2 [keV] : 31.1898 (-3.90558 6.41387)
R2^2/D10^2 : 1.75989E-02 (-0.00825896 0.0107792)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.124e-07 1.008e-07
25- 50 2.247e-06 2.104e-07
50-150 6.533e-06 7.451e-07
15-150 9.593e-06 9.396e-07
Peak spectrum fit
Power-law model
Time interval is from 12.572 sec. to 13.572 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.889511 ( -0.0938426 0.0921654 )
Norm@50keV : 9.86060E-02 ( -0.00548806 0.00546652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.28 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 57 degrees of freedom
# Null hypothesis probability = 1.455535e-01
Photon flux (15-150 keV) in 1 sec: 11.3170 ( -0.629264 0.62995 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11117e-06 ( -6.41061e-08 6.41894e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.572 sec. to 13.572 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.587634 ( -0.390149 0.268654 )
Epeak [keV] : 283.564 ( )
Norm@50keV : 0.132576 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.21 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 56 degrees of freedom
# Null hypothesis probability = 1.650669e-01
Photon flux (15-150 keV) in 1 sec: 11.2162 ( -0.6408 0.641 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10379e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 12.572 sec. to 13.572 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99998 ( -4.99998 -4.99998 )
beta : -0.918189 ( -0.0990014 0.0993389 )
Epeak [keV] : 25.9428 ( -25.9428 5.68588 )
Norm@50keV : 4871.13 ( -260.652 1.24724e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.26 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 55 degrees of freedom
# Null hypothesis probability = 1.240935e-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] : 24.9827 (-1.79271 2.00425)
R^2/D10^2 : 0.286190 (-0.0599376 0.0735168)
(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 3.104e-08 3.725e-09
25- 50 1.760e-07 1.555e-08
50-150 8.148e-07 6.070e-08
15-150 1.022e-06 6.810e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 44.9417 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.119e-07 7.450e-09
25- 50 2.153e-07 1.810e-08
50-150 4.721e-07 9.760e-08
15-150 7.993e-07 1.269e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.06659 (-1.59042 2.09832)
R1^2/D10^2 : 6.36741 (-3.58787 9.32112)
kT2 [keV] : 32.9220 (-3.95281 6.02628)
R2^2/D10^2 : 0.112585 (-0.0458973 0.0562576)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.958e-08 2.443e-08
25- 50 1.871e-07 3.675e-08
50-150 8.573e-07 1.159e-07
15-150 1.114e-06 1.437e-07
Plot creation:
Fri Dec 15 16:08:44 EST 2023