batgrbproduct analysis for trigger=1199764
batgrbproduct Analysis for Trigger=1199764
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 Nov 29 23:44:12 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1199764/GCN5_download_cron
======================================================================
Trigger: 01199764 Segment: 000
BAT Trigger Time: 722927191.552 [s; MET]
Trigger Stop: 722927192.576 [s; MET]
UTC: 2023-11-29T05:05:59.096760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 317.536113005641 Dec: 41.5435082108941 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.94
Image Trigger?: NO
Rate S/N Ratio: 22.5166604983954 [ if not an image trigger ]
Image S/N Ratio: 10.94
Flight Position: [ source = BAT ]
RA: 317.536113005641 Dec: 41.5435082108941 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 317.540674287433 Dec: 41.5300946252623 [deg; J2000]
{ 21h 10m 09.8s , +41d 31' 48.3" }
+/- 0.974681702947114 [arcmin] (estimated 90% radius based on SNR)
+/- 0.329432615012418 [arcmin] (formal 1-sigma fit error)
SNR: 31.5521273773499
Angular difference between Flight and Ground position is 0.830478 arcmin
Partial Coding Fraction: 0.4648438 [ including projection effects ]
Duration
T90: 105.463999986649 +/- 1.82803938175702
Measured from: 1.94000005722046
to: 107.404000043869 [s; relative to TRIGTIME]
T50: 66.404000043869 +/- 1.37877051440806
Measured from: 21.3400000333786
to: 87.7440000772476 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 88.7120000123978
to: 89.7120000123978 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.74800002574921
to: 118.96799993515 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.969777 7.775182 5.441408 1.124422
0.100306 0.107893 0.094771 0.075030 [error]
Peak 0.154458 0.222238 0.098546 0.007161
0.009631 0.010592 0.007913 0.005331 [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 2.34e-06 3.62e-06 4.22e-06 9.47e-06 1.30e-05 1.97e-05 erg/cm2
Error 9.57e-08 8.58e-08 1.06e-07 5.37e-07 2.66e-07 5.91e-07 erg/cm2
Peak flux Power-law 2.21e+00 1.58e+00 7.45e-01 4.95e-01 4.77e+00 5.02e+00 ph/cm2/s
Error 1.97e-01 9.63e-02 6.51e-02 8.08e-02 3.00e-01 3.07e-01 ph/cm2/s
Fluence Cutoff-PL 2.10e-06 3.70e-06 4.37e-06 5.80e-06 1.26e-05 1.60e-05 erg/cm2
Error 1.29e-07 9.24e-08 1.23e-07 1.06e-06 2.99e-07 1.10e-06 erg/cm2
Peak flux Cutoff-PL 1.85e+00 1.83e+00 7.82e-01 1.35e-01 4.58e+00 4.60e+00 ph/cm2/s
Error 2.33e-01 1.36e-01 8.01e-02 6.98e-02 3.08e-01 3.16e-01 ph/cm2/s
Fluence Band 2.03e-06 3.71e-06 4.33e-06 7.42e-06 1.26e-05 1.75e-05 erg/cm2
Error 1.41e-07 9.85e-08 1.30e-07 -------- 2.98e-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 1.780 0.039 - - 1.17e-02 2.37e-04 70.950 57
CPL 1.352 0.172 83.7 14.6 1.82e-02 3.22e-03 51.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.083 0.101 - - 3.06e-02 2.10e-03 79.920 57
CPL 0.710 0.572 42.0 4.7 1.74e-01 1.44e-01 57.260 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: 91.584000 sec.
T50 in the 50-300 keV band: 51.456000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 120.716 -1.748 118.968
T90 105.464 1.940 107.404
T50 66.404 21.340 87.744
Peak 1.000 88.712 89.712
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
317.5407 +41.5301 0.0061 42.4 -20.5 4.2033 31.6 TRIG_01199764
------------------------------------------
Foreground time interval of the image:
-1.748 15.649 (delta_t = 17.397 [sec])
Background time interval of the image:
-32.451 -1.748 (delta_t = 30.703 [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 -1.748 sec. to 118.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78024 ( -0.0385585 0.0386124 )
Norm@50keV : 1.16613E-02 ( -0.000237257 0.000237258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.95 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 57 degrees of freedom
# Null hypothesis probability = 1.013209e-01
Photon flux (15-150 keV) in 120.7 sec: 1.59475 ( -0.0390446 0.0392308 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29679e-05 ( -2.6571e-07 2.65763e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.748 sec. to 118.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35167 ( -0.17556 0.169123 )
Epeak [keV] : 83.7325 ( -9.75203 19.438 )
Norm@50keV : 1.82107E-02 ( -0.00288009 0.0035637 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.44 using 59 PHA bins.
# Reduced chi-squared = 0.9186 for 56 degrees of freedom
# Null hypothesis probability = 6.478414e-01
Photon flux (15-150 keV) in 120.7 sec: 1.53244 ( -0.04465 0.04505 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26245e-05 ( -2.99215e-07 2.97888e-07 ) ergs/cm2
Band function
Time interval is from -1.748 sec. to 118.968 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21892 ( -0.233201 0.304605 )
beta : -2.07932 ( 2.07838 0.151381 )
Epeak [keV] : 72.6051 ( -13.4732 18.6008 )
Norm@50keV : 2.13870E-02 ( -0.00480859 0.00991675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.00 using 59 PHA bins.
# Reduced chi-squared = 0.8909 for 55 degrees of freedom
# Null hypothesis probability = 7.019223e-01
Photon flux (15-150 keV) in 120.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25721e-05 ( -1.25713e-05 -2.98129e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1202 ( )
R^2/D10^2 : 0.156393 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 476.79 using 59 PHA bins.
# Reduced chi-squared = 8.3648 for 57 degrees of freedom
# Null hypothesis probability = 1.366698e-67
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.023e-07 3.941e-08
25- 50 3.612e-06 9.958e-08
50-150 5.639e-06 2.022e-07
15-150 1.015e-05 2.348e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 124.045 (-8.85859 15.3437)
Norm : 6.62423 (-0.240313 0.183873)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.008e-06 1.014e-07
25- 50 3.653e-06 1.473e-07
50-150 6.840e-06 1.366e-06
15-150 1.250e-05 1.427e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.42577 (-0.74057 0.792031)
R1^2/D10^2 : 1.34196 (-0.381865 0.601933)
kT2 [keV] : 24.1646 (-1.96565 2.60733)
R2^2/D10^2 : 2.07858E-02 (-0.00709961 0.00881483)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.778e-06 1.352e-07
25- 50 3.771e-06 1.563e-07
50-150 6.753e-06 3.398e-07
15-150 1.230e-05 4.906e-07
Peak spectrum fit
Power-law model
Time interval is from 88.712 sec. to 89.712 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08288 ( -0.099558 0.102533 )
Norm@50keV : 3.05543E-02 ( -0.00211164 0.00209275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.92 using 59 PHA bins.
# Reduced chi-squared = 1.402 for 57 degrees of freedom
# Null hypothesis probability = 2.426206e-02
Photon flux (15-150 keV) in 1 sec: 4.76678 ( -0.299743 0.300153 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83429e-07 ( -1.83994e-08 1.84556e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 88.712 sec. to 89.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.709652 ( -0.608632 0.534925 )
Epeak [keV] : 42.0243 ( -4.72143 4.5936 )
Norm@50keV : 0.174216 ( -0.0851569 0.203485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.26 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 56 degrees of freedom
# Null hypothesis probability = 4.282121e-01
Photon flux (15-150 keV) in 1 sec: 4.57508 ( -0.30709 0.30824 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65303e-07 ( -1.9344e-08 1.9571e-08 ) ergs/cm2
Band function
Time interval is from 88.712 sec. to 89.712 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.181475 ( -0.831721 1.22831 )
beta : -2.85642 ( -2.29929 0.381071 )
Epeak [keV] : 39.1599 ( -4.74723 5.16703 )
Norm@50keV : 0.375663 ( -0.401476 2.01644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.58 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 55 degrees of freedom
# Null hypothesis probability = 4.904689e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.69036e-07 ( -2.69029e-07 -1.9028e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6894 (-0.644958 0.680297)
R^2/D10^2 : 1.78485 (-0.387213 0.493438)
(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 4.234e-08 4.245e-09
25- 50 1.153e-07 7.850e-09
50-150 7.279e-08 1.028e-08
15-150 2.305e-07 1.580e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.2794 (-9.02614 10.8603)
Norm : 24.8946 (-2.39608 2.63763)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.293e-08 5.475e-09
25- 50 9.686e-08 5.965e-09
50-150 1.136e-07 1.407e-08
15-150 2.734e-07 1.890e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.99954 (-2.27114 1.58829)
R1^2/D10^2 : 4.12673 (-1.66778 6.14217)
kT2 [keV] : 21.6982 (-7.27592 31.2831)
R2^2/D10^2 : 5.23838E-02 (-0.0488904 0.334875)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.235e-08 9.880e-09
25- 50 1.077e-07 2.084e-08
50-150 1.066e-07 4.350e-08
15-150 2.666e-07 6.100e-08
Plot creation:
Wed Nov 29 23:46:26 EST 2023