batgrbproduct analysis for trigger=1167266
batgrbproduct Analysis for Trigger=1167266
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): Sun May 7 13:16:04 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1167266/batgroup_hand_proc
======================================================================
Trigger: 01167266 Segment: 000
BAT Trigger Time: 705069949.952 [s; MET]
Trigger Stop: 705069950.08 [s; MET]
UTC: 2023-05-06T12:45:18.718180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.992980588766 Dec: 44.5403527391438 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.5
Image Trigger?: NO
Rate S/N Ratio: 32.9241552663087 [ if not an image trigger ]
Image S/N Ratio: 9.5
Flight Position: [ source = BAT ]
RA: 326.992980588766 Dec: 44.5403527391438 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 326.985868732122 Dec: 44.5141426681885 [deg; J2000]
{ 21h 47m 56.6s , +44d 30' 50.9" }
+/- 1.21574348727153 [arcmin] (estimated 90% radius based on SNR)
+/- 0.43333938036842 [arcmin] (formal 1-sigma fit error)
SNR: 23.0099455937413
Angular difference between Flight and Ground position is 1.601758 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 61.539999961853 +/- 10.8925583836745
Measured from: 2.62399995326996
to: 64.163999915123 [s; relative to TRIGTIME]
T50: 21.5359998941422 +/- 3.96879016687736
Measured from: 10.9919999837875
to: 32.5279998779297 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.6039999723434
to: 11.6039999723434 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0239999294281006
to: 76.2960000038147 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.209569 1.717474 1.312353 0.443115
0.096711 0.095553 0.078766 0.067627 [error]
Peak 0.131856 0.212727 0.195473 0.053052
0.014822 0.016330 0.015639 0.012442 [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 3.58e-07 6.94e-07 1.04e-06 3.38e-06 2.93e-06 5.47e-06 erg/cm2
Error 4.16e-08 4.66e-08 7.89e-08 5.85e-07 1.92e-07 6.32e-07 erg/cm2
Peak flux Power-law 1.29e+00 1.49e+00 1.23e+00 1.70e+00 4.63e+00 5.71e+00 ph/cm2/s
Error 1.88e-01 1.33e-01 1.24e-01 3.56e-01 3.81e-01 5.03e-01 ph/cm2/s
Fluence Cutoff-PL 3.58e-07 6.95e-07 1.04e-06 3.35e-06 2.93e-06 5.44e-06 erg/cm2
Error 4.19e-08 4.60e-08 7.83e-08 7.06e-07 1.90e-07 8.75e-07 erg/cm2
Peak flux Cutoff-PL 1.18e+00 1.56e+00 1.28e+00 9.82e-01 4.54e+00 5.00e+00 ph/cm2/s
Error 2.25e-01 1.60e-01 1.42e-01 6.42e-01 3.96e-01 7.72e-01 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 1.414 0.113 - - 3.99e-03 2.38e-04 39.420 57
CPL 1.408 0.113 9999.3 0.0 4.00e-03 7.67e-04 39.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.276 0.140 - - 3.89e-02 3.22e-03 47.760 57
CPL 0.790 0.592 126.4 -40.1 6.82e-02 5.18e-02 45.610 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: 60.672000 sec.
T50 in the 50-300 keV band: 17.088000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 76.272 0.024 76.296
T90 61.540 2.624 64.164
T50 21.536 10.992 32.528
Peak 1.000 10.604 11.604
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
326.9859 +44.5141 0.0083 16.7 -87.7 2.1131 23.0 TRIG_01167266
------------------------------------------
Foreground time interval of the image:
0.024 14.749 (delta_t = 14.725 [sec])
Background time interval of the image:
-239.952 0.024 (delta_t = 239.976 [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 0.024 sec. to 76.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41403 ( -0.112864 0.112289 )
Norm@50keV : 3.98707E-03 ( -0.000238484 0.000238249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.42 using 59 PHA bins.
# Reduced chi-squared = 0.6915 for 57 degrees of freedom
# Null hypothesis probability = 9.633332e-01
Photon flux (15-150 keV) in 76.27 sec: 0.487119 ( -0.0306352 0.030791 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93006e-06 ( -1.91866e-07 1.92817e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.024 sec. to 76.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40837 ( -0.112927 0.113648 )
Epeak [keV] : 9999.27 ( -9999.35 -9999.35 )
Norm@50keV : 3.99743E-03 ( -0.000239352 0.00129535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.44 using 59 PHA bins.
# Reduced chi-squared = 0.7043 for 56 degrees of freedom
# Null hypothesis probability = 9.542690e-01
Photon flux (15-150 keV) in 76.27 sec: 0.487158 ( -0.03084 0.03051 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.92952e-06 ( -1.90538e-07 1.89272e-07 ) ergs/cm2
Band function
Time interval is from 0.024 sec. to 76.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16160 ( 1.16161 1.16161 )
beta : -1.41402 ( 1.41402 0.112858 )
Epeak [keV] : 28.9498 ( -28.9476 -28.9476 )
Norm@50keV : 7.97585E-03 ( -0.00337636 626.065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.42 using 59 PHA bins.
# Reduced chi-squared = 0.7167 for 55 degrees of freedom
# Null hypothesis probability = 9.440503e-01
Photon flux (15-150 keV) in 76.27 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] : 16.7182 ( )
R^2/D10^2 : 3.69671E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 121.29 using 59 PHA bins.
# Reduced chi-squared = 2.1278 for 57 degrees of freedom
# Null hypothesis probability = 1.526151e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.612e-07 2.097e-08
25- 50 7.037e-07 5.991e-08
50-150 1.397e-06 1.590e-07
15-150 2.262e-06 1.888e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-21.8323 -200)
Norm : 2.01257 (-0.120459 0.120459)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.822e-07 2.784e-08
25- 50 7.353e-07 6.102e-08
50-150 1.613e-06 3.302e-07
15-150 2.730e-06 4.000e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.40794 (-1.46302 1.63442)
R1^2/D10^2 : 0.426880 (-0.206051 0.499995)
kT2 [keV] : 33.2375 (-7.03225 14.0977)
R2^2/D10^2 : 3.11378E-03 (-0.00202227 0.00377148)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.417e-07 7.410e-08
25- 50 7.092e-07 1.289e-07
50-150 1.931e-06 5.404e-07
15-150 2.982e-06 6.559e-07
Peak spectrum fit
Power-law model
Time interval is from 10.604 sec. to 11.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27607 ( -0.139841 0.139969 )
Norm@50keV : 3.89356E-02 ( -0.00322736 0.00321635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.76 using 59 PHA bins.
# Reduced chi-squared = 0.8379 for 57 degrees of freedom
# Null hypothesis probability = 8.033650e-01
Photon flux (15-150 keV) in 1 sec: 4.62523 ( -0.381378 0.381622 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.87051e-07 ( -3.65081e-08 3.6838e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.604 sec. to 11.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.789660 ( -0.647065 0.537229 )
Epeak [keV] : 126.447 ( -46.2394 -126.447 )
Norm@50keV : 6.82262E-02 ( -0.0306082 0.0729003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.61 using 59 PHA bins.
# Reduced chi-squared = 0.8145 for 56 degrees of freedom
# Null hypothesis probability = 8.378054e-01
Photon flux (15-150 keV) in 1 sec: 4.53716 ( -0.39699 0.39489 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72689e-07 ( -4.0928e-08 4.0746e-08 ) ergs/cm2
Band function
Time interval is from 10.604 sec. to 11.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.264053 ( 0.600583 0.600583 )
beta : -1.50627 ( 1.57565 0.357584 )
Epeak [keV] : 69.8168 ( -69.3543 296.989 )
Norm@50keV : 0.146243 ( -0.151502 886.088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.16 using 59 PHA bins.
# Reduced chi-squared = 0.8212 for 55 degrees of freedom
# Null hypothesis probability = 8.253132e-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] : 16.5178 (-1.65999 1.90525)
R^2/D10^2 : 0.398173 (-0.122234 0.170655)
(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 2.229e-08 3.460e-09
25- 50 9.636e-08 1.104e-08
50-150 1.859e-07 3.010e-08
15-150 3.046e-07 3.255e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-25.0946 -200)
Norm : 18.9117 (-1.56043 1.56043)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.708e-08 5.430e-09
25- 50 9.057e-08 2.428e-08
50-150 1.986e-07 7.627e-08
15-150 3.363e-07 1.135e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.49725 (-2.88224 3.5894)
R1^2/D10^2 : 2.12251 (-1.25626 5.22811)
kT2 [keV] : 29.4361 (-8.24295 46.7016)
R2^2/D10^2 : 4.41179E-02 (-0.0411381 0.103912)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.493e-08 1.341e-08
25- 50 9.300e-08 4.070e-08
50-150 2.461e-07 1.201e-07
15-150 3.740e-07 1.613e-07
Plot creation:
Sun May 7 13:22:52 EDT 2023