batgrbproduct analysis for trigger=1149293
batgrbproduct Analysis for Trigger=1149293
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 Jan 18 13:00:12 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1149293/batgroup_hand_proc
======================================================================
Trigger: 01149293 Segment: 000
BAT Trigger Time: 695595913.856 [s; MET]
Trigger Stop: 695595926.016 [s; MET]
UTC: 2023-01-16T21:04:43.267620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 98.5941375765579 Dec: 49.840140677662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.08
Image Trigger?: NO
Rate S/N Ratio: 14.1067359796659 [ if not an image trigger ]
Image S/N Ratio: 10.08
Flight Position: [ source = BAT ]
RA: 98.5941375765579 Dec: 49.840140677662 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 98.5712442257505 Dec: 49.8440254116627 [deg; J2000]
{ 06h 34m 17.1s , +49d 50' 38.5" }
+/- 1.94162438879087 [arcmin] (estimated 90% radius based on SNR)
+/- 0.702706689944712 [arcmin] (formal 1-sigma fit error)
SNR: 11.7883706388317
Angular difference between Flight and Ground position is 0.915982 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 41 +/- 11.1803398874989
Measured from: 2.14400005340576
to: 43.1440000534058 [s; relative to TRIGTIME]
T50: 16 +/- 8.24621125123532
Measured from: 7.14400005340576
to: 23.1440000534058 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.1440000534058
to: 13.1440000534058 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.14400005340576
to: 53.1440000534058 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.286286 0.566947 0.370859 0.108004
0.059872 0.061517 0.052637 0.043739 [error]
Peak 0.011354 0.031786 0.021491 0.009722
0.008472 0.008987 0.007402 0.006051 [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 9.61e-08 1.89e-07 2.90e-07 9.71e-07 8.12e-07 1.55e-06 erg/cm2
Error 2.11e-08 2.62e-08 4.92e-08 3.50e-07 1.22e-07 3.89e-07 erg/cm2
Peak flux Power-law 1.67e-01 1.73e-01 1.27e-01 1.49e-01 5.25e-01 6.17e-01 ph/cm2/s
Error 9.51e-02 6.52e-02 5.62e-02 1.32e-01 1.88e-01 2.25e-01 ph/cm2/s
Fluence Cutoff-PL 8.67e-08 2.09e-07 2.97e-07 2.96e-07 7.51e-07 8.89e-07 erg/cm2
Error 2.41e-08 3.61e-08 5.64e-08 6.88e-07 1.43e-07 6.60e-07 erg/cm2
Peak flux Cutoff-PL 8.76e-02 2.03e-01 1.57e-01 2.57e-02 4.70e-01 4.74e-01 ph/cm2/s
Error 1.18e-01 9.13e-02 7.59e-02 -------- 2.17e-01 2.51e-01 ph/cm2/s
Fluence Band 7.75e-08 2.27e-07 2.77e-07 6.41e-07 7.70e-07 1.23e-06 erg/cm2
Error 2.61e-08 3.96e-08 -------- -------- -------- -------- 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 1.385 0.220 - - 1.61e-03 2.16e-04 53.890 57
CPL 0.577 1.076 82.7 -27.7 4.35e-03 1.02e-02 51.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.451 0.600 - - 4.26e-03 1.56e-03 51.100 57
CPL -1.103 0.925 63.4 -22.3 6.90e-02 1.16e+03 49.650 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: 9.408000 sec.
T50 in the 50-300 keV band: 6.272000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 52.000 1.144 53.144
T90 41.000 2.144 43.144
T50 16.000 7.144 23.144
Peak 1.000 12.144 13.144
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
98.5712 +49.8440 0.0163 10.6 132.4 1.4034 11.8 TRIG_01149293
------------------------------------------
Foreground time interval of the image:
1.144 53.144 (delta_t = 52.000 [sec])
Background time interval of the image:
-239.856 1.144 (delta_t = 241.000 [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 1.144 sec. to 53.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38497 ( -0.220555 0.219852 )
Norm@50keV : 1.61197E-03 ( -0.000216061 0.000215091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.89 using 59 PHA bins.
# Reduced chi-squared = 0.9455 for 57 degrees of freedom
# Null hypothesis probability = 5.923329e-01
Photon flux (15-150 keV) in 52 sec: 0.195648 ( -0.0259421 0.0259709 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.1249e-07 ( -1.20697e-07 1.22547e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.144 sec. to 53.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.576552 ( -1.25956 0.892908 )
Epeak [keV] : 82.7162 ( -27.2611 -82.7309 )
Norm@50keV : 4.34543E-03 ( -0.00434385 0.0160922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.85 using 59 PHA bins.
# Reduced chi-squared = 0.9259 for 56 degrees of freedom
# Null hypothesis probability = 6.326954e-01
Photon flux (15-150 keV) in 52 sec: 0.189762 ( -0.027101 0.02697 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.50604e-07 ( -1.42334e-07 1.43863e-07 ) ergs/cm2
Band function
Time interval is from 1.144 sec. to 53.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.85494 ( -12.8076 -4.85494 )
beta : -1.74727 ( -0.475929 0.324142 )
Epeak [keV] : 32.9495 ( -5.57533 6.00427 )
Norm@50keV : 26.0511 ( -3.3554 122.484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.57 using 59 PHA bins.
# Reduced chi-squared = 0.8831 for 55 degrees of freedom
# Null hypothesis probability = 7.171117e-01
Photon flux (15-150 keV) in 52 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.69564e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.1458 (-2.0864 2.60486)
R^2/D10^2 : 2.83254E-02 (-0.0126978 0.0214309)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.302626e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.220e-08 1.656e-08
25- 50 2.337e-07 4.498e-08
50-150 3.096e-07 8.042e-08
15-150 6.054e-07 1.069e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.9942 -200)
Norm : 0.807429 (-0.105759 0.105759)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.046e-07 5.915e-08
25- 50 2.011e-07 1.114e-07
50-150 4.411e-07 2.446e-07
15-150 7.468e-07 4.157e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.81685 (-3.34718 3.07792)
R1^2/D10^2 : 7.59338E-02 (-0.0363675 0.107743)
kT2 [keV] : 39.9075 (-36.2833 -57.5723)
R2^2/D10^2 : 5.18935E-04 (-0.000155946 0.00474787)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.254e-08 4.390e-08
25- 50 2.243e-07 1.233e-07
50-150 4.531e-07 2.557e-07
15-150 7.599e-07 3.960e-07
Peak spectrum fit
Power-law model
Time interval is from 12.144 sec. to 13.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45137 ( -0.578574 0.620522 )
Norm@50keV : 4.26174E-03 ( -0.00157623 0.00154214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.8965 for 57 degrees of freedom
# Null hypothesis probability = 6.948717e-01
Photon flux (15-150 keV) in 1 sec: 0.525369 ( -0.188109 0.188625 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.0772e-08 ( -1.6014e-08 1.64452e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.144 sec. to 13.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.10257 ( 1.2138 3.06399 )
Epeak [keV] : 63.4194 ( -18.2638 -62.9225 )
Norm@50keV : 6.89582E-02 ( -0.0884467 2329.29 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.8867 for 56 degrees of freedom
# Null hypothesis probability = 7.124034e-01
Photon flux (15-150 keV) in 1 sec: 0.469942 ( -0.222635 0.211554 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61555e-08 ( -1.72294e-08 1.79269e-08 ) ergs/cm2
Band function
Time interval is from 12.144 sec. to 13.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.933015 ( 0.49057 4.16479 )
beta : -10.00000 ( 10 2.46654e-07 )
Epeak [keV] : 64.5072 ( -19.9325 32.8428 )
Norm@50keV : 5.85339E-02 ( -0.0200655 4.10041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.9028 for 55 degrees of freedom
# Null hypothesis probability = 6.784455e-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] : 15.9400 (-4.45667 6.94919)
R^2/D10^2 : 5.39348E-02 (-0.0539348 0.113308)
(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 2.836e-09 1.819e-09
25- 50 1.189e-08 7.375e-09
50-150 2.109e-08 1.476e-08
15-150 3.582e-08 2.240e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 2.18112 (-0.767951 0.768427)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.431e-09 3.502e-09
25- 50 1.045e-08 6.730e-09
50-150 2.291e-08 1.404e-08
15-150 3.879e-08 2.440e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.36718 (-1.75736 16.3935)
R1^2/D10^2 : 8504.58 (-7750.74 -7750.74)
kT2 [keV] : 17.0077 (-4.86055 8.18201)
R2^2/D10^2 : 4.12378E-02 (-0.0307731 0.0508428)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.474e-09 2.025e-09
25- 50 1.053e-08 6.590e-09
50-150 2.247e-08 1.530e-08
15-150 3.748e-08 2.300e-08
Plot creation:
Wed Jan 18 13:18:37 EST 2023