batgrbproduct analysis for trigger=1150965
batgrbproduct Analysis for Trigger=1150965
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 Jan 27 13:30:12 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1150965/GCN5_download_cron
======================================================================
Trigger: 01150965 Segment: 000
BAT Trigger Time: 696426824.768 [s; MET]
Trigger Stop: 696426825.024 [s; MET]
UTC: 2023-01-26T11:53:14.123020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 70.257768236197 Dec: 44.5538703832069 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.63
Image Trigger?: NO
Rate S/N Ratio: 7.68114574786861 [ if not an image trigger ]
Image S/N Ratio: 6.63
Flight Position: [ source = BAT ]
RA: 70.257768236197 Dec: 44.5538703832069 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 70.2655240227973 Dec: 44.5194586573401 [deg; J2000]
{ 04h 41m 03.7s , +44d 31' 10.1" }
+/- 4.31235066566997 [arcmin] (estimated 90% radius based on SNR)
+/- 2.5534347265289 [arcmin] (formal 1-sigma fit error)
SNR: 3.77037021333983
Angular difference between Flight and Ground position is 2.091178 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 462.831999897957 +/- 12.1033840355724
Measured from: -200.095999836922
to: 262.736000061035 [s; relative to TRIGTIME]
T50: 280.987999916077 +/- 53.1841790903088
Measured from: -88.5119998455048
to: 192.476000070572 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -159.404000043869
to: -158.404000043869 [s; relative to TRIGTIME]
Total Fluence
Measured from: -224.296000003815
to: 282.307999968529 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 16.573443 15.094913 4.279174 -0.018396
0.214189 0.216051 0.174327 0.142662 [error]
Peak 0.087429 0.103925 0.035491 0.002356
0.010258 0.010885 0.008358 0.006274 [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 6.05e-06 5.67e-06 3.69e-06 3.71e-06 1.69e-05 1.91e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 7.93e-01 5.63e-01 2.63e-01 1.73e-01 1.70e+00 1.79e+00 ph/cm2/s
Error 1.37e-01 7.94e-02 6.08e-02 7.10e-02 2.35e-01 2.52e-01 ph/cm2/s
Fluence Cutoff-PL 4.81e-06 6.30e-06 3.23e-06 5.14e-07 1.48e-05 1.48e-05 erg/cm2
Error 3.22e-07 1.84e-07 2.16e-07 1.72e-07 5.26e-07 5.58e-07 erg/cm2
Peak flux Cutoff-PL 6.36e-01 7.85e-01 2.43e-01 1.07e-02 1.67e+00 1.67e+00 ph/cm2/s
Error 1.64e-01 1.25e-01 8.10e-02 1.89e-02 2.32e-01 2.32e-01 ph/cm2/s
Fluence Band 4.76e-06 6.27e-06 3.22e-06 5.13e-07 1.47e-05 1.48e-05 erg/cm2
Error 2.97e-07 1.73e-07 2.13e-07 -------- 5.08e-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 2.620 0.000 - - 3.23e-03 0.00e+00 152.480 57
CPL 0.965 0.329 25.8 3.4 2.71e-02 1.20e-02 47.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.096 0.229 - - 1.08e-02 1.96e-03 86.160 57
CPL -0.805 1.557 38.7 5.4 5.71e-01 3.26e+00 68.820 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: 11.264000 sec.
T50 in the 50-300 keV band: 5.440000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 506.604 -224.296 282.308
T90 462.832 -200.096 262.736
T50 280.988 -88.512 192.476
Peak 1.000 -159.404 -158.404
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
70.2655 +44.5195 0.0510 13.0 -124.9 6.8078 3.8 TRIG_01150965
------------------------------------------
Foreground time interval of the image:
-224.296 196.833 (delta_t = 421.129 [sec])
Background time interval of the image:
-239.768 -224.296 (delta_t = 15.472 [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 -224.296 sec. to 282.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.61982 ( )
Norm@50keV : 3.22724E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.48 using 59 PHA bins.
# Reduced chi-squared = 2.6750 for 57 degrees of freedom
# Null hypothesis probability = 1.204365e-10
Photon flux (15-150 keV) in 506.6 sec: 0.683530 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69335e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -224.296 sec. to 282.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.965285 ( -0.340185 0.318011 )
Epeak [keV] : 25.8168 ( -3.87941 2.8989 )
Norm@50keV : 2.70953E-02 ( -0.00906199 0.01492 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8393 for 56 degrees of freedom
# Null hypothesis probability = 7.987093e-01
Photon flux (15-150 keV) in 506.6 sec: 0.600462 ( -0.024229 0.024456 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47778e-05 ( -5.21697e-07 5.30106e-07 ) ergs/cm2
Band function
Time interval is from -224.296 sec. to 282.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.964873 ( -0.223057 0.471107 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 25.8136 ( -3.87942 2.89684 )
Norm@50keV : 2.71109E-02 ( -0.00907585 0.0149444 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8545 for 55 degrees of freedom
# Null hypothesis probability = 7.700318e-01
Photon flux (15-150 keV) in 506.6 sec: 0.602446 ( 6.39755 -0.025815 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47485e-05 ( -1.47449e-05 -5.12578e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.81676 ( )
R^2/D10^2 : 0.432052 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 156.90 using 59 PHA bins.
# Reduced chi-squared = 2.7526 for 57 degrees of freedom
# Null hypothesis probability = 2.856249e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.276e-06 1.535e-07
25- 50 6.741e-06 1.773e-07
50-150 2.414e-06 1.603e-07
15-150 1.243e-05 3.394e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 33.6793 (-1.82963 1.97657)
Norm : 4.68153 (-0.283966 0.303921)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.098e-06 2.026e-07
25- 50 6.191e-06 1.596e-07
50-150 3.925e-06 2.913e-07
15-150 1.521e-05 3.850e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.08807 (-0.608509 0.65165)
R1^2/D10^2 : 2.68277 (-0.96842 1.79649)
kT2 [keV] : 12.2409 (-0.986243 1.31434)
R2^2/D10^2 : 7.39672E-02 (-0.0316163 0.0424678)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.732e-06 5.585e-07
25- 50 6.245e-06 5.725e-07
50-150 3.603e-06 5.332e-07
15-150 1.458e-05 1.535e-06
Peak spectrum fit
Power-law model
Time interval is from -159.404 sec. to -158.404 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.09588 ( -0.219227 0.239454 )
Norm@50keV : 1.08438E-02 ( -0.00197915 0.00194698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.16 using 59 PHA bins.
# Reduced chi-squared = 1.512 for 57 degrees of freedom
# Null hypothesis probability = 7.576525e-03
Photon flux (15-150 keV) in 1 sec: 1.70255 ( -0.235482 0.235518 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00725e-07 ( -1.66598e-08 1.71163e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -159.404 sec. to -158.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.805363 ( -1.77502 1.33844 )
Epeak [keV] : 38.6839 ( -5.18284 5.7138 )
Norm@50keV : 0.570638 ( -0.579132 5.93798 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.82 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 56 degrees of freedom
# Null hypothesis probability = 1.167845e-01
Photon flux (15-150 keV) in 1 sec: 1.67426 ( -0.23134 0.23189 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.09012e-08 ( -1.40861e-08 1.50838e-08 ) ergs/cm2
Band function
Time interval is from -159.404 sec. to -158.404 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.691621 ( -1.2201 1.89526 )
beta : -9.27386 ( 8.27247 18.2706 )
Epeak [keV] : 38.6995 ( -5.12703 5.72165 )
Norm@50keV : 0.489516 ( -0.489528 5.89601 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.84 using 59 PHA bins.
# Reduced chi-squared = 1.252 for 55 degrees of freedom
# Null hypothesis probability = 9.943025e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04836e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.96486 (-1.157 1.26802)
R^2/D10^2 : 0.919361 (-0.341805 0.546493)
(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 1.857e-08 4.320e-09
25- 50 4.594e-08 8.465e-09
50-150 2.373e-08 8.730e-09
15-150 8.824e-08 1.612e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.4810 (-13.8916 22.0215)
Norm : 9.84779 (-1.8149 2.2753)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.434e-08 4.300e-09
25- 50 3.555e-08 5.910e-09
50-150 3.610e-08 1.335e-08
15-150 9.598e-08 1.916e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.41465 (-3.41464 -3.41464)
R1^2/D10^2 : 12.4503 (-12.4587 -12.4587)
kT2 [keV] : 10.6697 (-1.56914 -10.6691)
R2^2/D10^2 : 0.660027 (-0.660242 0.635179)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.058e-08 1.020e-08
25- 50 4.349e-08 2.453e-08
50-150 2.661e-08 1.601e-08
15-150 9.067e-08 4.924e-08
Plot creation:
Fri Jan 27 13:33:36 EST 2023