batgrbproduct analysis for trigger=1165354
batgrbproduct Analysis for Trigger=1165354
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): Tue Apr 25 17:54:18 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1165354/batgroup_hand_proc
======================================================================
Trigger: 01165354 Segment: 000
BAT Trigger Time: 703969706.624 [s; MET]
Trigger Stop: 703969718.784 [s; MET]
UTC: 2023-04-23T19:07:55.465280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 122.604962807057 Dec: -21.9203287405549 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.3
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 7.3
Flight Position: [ source = BAT ]
RA: 122.604962807057 Dec: -21.9203287405549 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 122.617613108822 Dec: -21.90101311814 [deg; J2000]
{ 08h 10m 28.2s , -21d 54' 03.6" }
+/- 2.31936388783496 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1251900313376 [arcmin] (formal 1-sigma fit error)
SNR: 9.14456016139219
Angular difference between Flight and Ground position is 1.356105 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 23.6039999723434 +/- 4.27154537102887
Measured from: -0.659999966621399
to: 22.944000005722 [s; relative to TRIGTIME]
T50: 13.5759999752045 +/- 5.71036467937035
Measured from: 3.89600002765656
to: 17.472000002861 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.6240000724792
to: 11.6240000724792 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.25199997425079
to: 24.4920001029968 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.223083 0.360289 0.195658 -0.002772
0.041995 0.043384 0.037300 0.032194 [error]
Peak 0.022458 0.037889 0.011594 0.001708
0.008410 0.008686 0.007360 0.006693 [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 7.60e-08 1.24e-07 1.54e-07 3.77e-07 4.61e-07 7.32e-07 erg/cm2
Error 1.69e-08 1.83e-08 3.53e-08 1.77e-07 8.29e-08 2.12e-07 erg/cm2
Peak flux Power-law 2.62e-01 1.95e-01 9.65e-02 6.81e-02 5.86e-01 6.22e-01 ph/cm2/s
Error 1.09e-01 6.47e-02 5.44e-02 8.16e-02 1.90e-01 2.08e-01 ph/cm2/s
Fluence Cutoff-PL 7.26e-08 1.31e-07 1.55e-07 1.82e-07 4.41e-07 5.40e-07 erg/cm2
Error 1.88e-08 2.45e-08 3.85e-08 3.22e-07 9.39e-08 2.25e-07 erg/cm2
Peak flux Cutoff-PL 1.92e-01 2.67e-01 8.60e-02 3.37e-03 5.49e-01 5.49e-01 ph/cm2/s
Error 1.69e-01 1.11e-01 6.60e-02 5.15e-02 2.37e-01 2.38e-01 ph/cm2/s
Fluence Band 7.02e-08 1.34e-07 1.48e-07 2.85e-07 4.46e-07 6.44e-07 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 1.691 0.267 - - 1.86e-03 3.14e-04 43.530 57
CPL 1.257 1.026 76.7 0.0 3.24e-03 0.00e+00 43.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.015 0.623 - - 3.88e-03 1.70e-03 57.980 57
CPL -0.676 1.097 40.5 0.0 1.43e-01 2.24e+04 56.060 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 26.744 -2.252 24.492
T90 23.604 -0.660 22.944
T50 13.576 3.896 17.472
Peak 1.000 10.624 11.624
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
122.6176 -21.9010 0.0211 5.0 -62.5 0.7312 9.1 TRIG_01165354
------------------------------------------
Foreground time interval of the image:
-2.252 24.492 (delta_t = 26.744 [sec])
Background time interval of the image:
-239.624 -2.252 (delta_t = 237.372 [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 -2.252 sec. to 24.492 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69125 ( -0.260047 0.27396 )
Norm@50keV : 1.86039E-03 ( -0.000318406 0.000310013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.53 using 59 PHA bins.
# Reduced chi-squared = 0.7637 for 57 degrees of freedom
# Null hypothesis probability = 9.054559e-01
Photon flux (15-150 keV) in 26.74 sec: 0.246330 ( -0.0363541 0.0363605 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6092e-07 ( -8.18263e-08 8.39935e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.252 sec. to 24.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25654 ( -1.29018 0.761454 )
Epeak [keV] : 76.7186 ( )
Norm@50keV : 3.23539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.01 using 59 PHA bins.
# Reduced chi-squared = 0.7680 for 56 degrees of freedom
# Null hypothesis probability = 8.986014e-01
Photon flux (15-150 keV) in 26.74 sec: 0.242284 ( -0.037614 0.03693 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41397e-07 ( -9.27958e-08 9.49618e-08 ) ergs/cm2
Band function
Time interval is from -2.252 sec. to 24.492 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25647 ( -6.88917 1.17069 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 76.7040 ( -33.2134 -76.704 )
Norm@50keV : 3.23520E-03 ( -0.00165767 0.0137972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.01 using 59 PHA bins.
# Reduced chi-squared = 0.7820 for 55 degrees of freedom
# Null hypothesis probability = 8.798385e-01
Photon flux (15-150 keV) in 26.74 sec: 0.242098 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45534e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5390 (-1.94576 2.47198)
R^2/D10^2 : 6.95278E-02 (-0.0352786 0.0669079)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.66 using 59 PHA bins.
# Reduced chi-squared = 0.9064 for 57 degrees of freedom
# Null hypothesis probability = 6.748811e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.213e-08 1.396e-08
25- 50 1.565e-07 3.133e-08
50-150 1.220e-07 4.484e-08
15-150 3.307e-07 7.835e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.150 (-54.1171 -123.017)
Norm : 1.05263 (-0.179427 0.227803)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.326e-08 2.158e-08
25- 50 1.315e-07 5.570e-08
50-150 2.367e-07 1.475e-07
15-150 4.414e-07 2.211e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68030 (-2.92344 2.73533)
R1^2/D10^2 : 0.224679 (-0.140252 0.251555)
kT2 [keV] : 28.4939 (-12.6573 117.237)
R2^2/D10^2 : 1.79348E-03 (-0.00171571 0.0156739)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.835e-08 3.802e-08
25- 50 1.390e-07 7.451e-08
50-150 2.447e-07 1.360e-07
15-150 4.520e-07 2.342e-07
Peak spectrum fit
Power-law model
Time interval is from 10.624 sec. to 11.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01489 ( -0.54831 0.697753 )
Norm@50keV : 3.87879E-03 ( -0.00175077 0.0016511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.98 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.388964e-01
Photon flux (15-150 keV) in 1 sec: 0.585841 ( -0.189445 0.189573 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58019e-08 ( -1.41792e-08 1.53354e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.624 sec. to 11.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.675531 ( 0.728473 2.92246 )
Epeak [keV] : 40.4534 ( -40.4275 -40.4275 )
Norm@50keV : 0.142992 ( -0.172871 44878.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 56 degrees of freedom
# Null hypothesis probability = 4.725478e-01
Photon flux (15-150 keV) in 1 sec: 0.548706 ( -0.27939 0.194547 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05569e-08 ( -1.10348e-08 1.51021e-08 ) ergs/cm2
Band function
Time interval is from 10.624 sec. to 11.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.77538 ( -3.70996 -1.70964 )
beta : -9.37043 ( 9.37153 19.367 )
Epeak [keV] : 40.5353 ( -40.4874 139.114 )
Norm@50keV : 0.589997 ( -0.446888 137.813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.349225e-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] : 10.3348 (-2.62634 3.42031)
R^2/D10^2 : 0.268651 (-0.268651 0.519702)
(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 5.905e-09 3.639e-09
25- 50 1.537e-08 9.140e-09
50-150 8.817e-09 6.760e-09
15-150 3.009e-08 1.923e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.5133 (-33.5324 -60.4744)
Norm : 3.13138 (-1.23846 2.0842)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.881e-09 4.878e-09
25- 50 1.203e-08 7.335e-09
50-150 1.378e-08 1.200e-08
15-150 3.369e-08 2.360e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.05506 (-1.04488 2.56126)
R1^2/D10^2 : 2.30839E+05 (-290006 -290021)
kT2 [keV] : 11.1043 (-2.83257 3.99772)
R2^2/D10^2 : 0.192942 (-0.136896 0.153029)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.126e-09 3.203e-09
25- 50 1.425e-08 8.800e-09
50-150 9.999e-09 7.225e-09
15-150 3.038e-08 1.829e-08
Plot creation:
Tue Apr 25 18:12:27 EDT 2023