batgrbproduct analysis for trigger=1159434
batgrbproduct Analysis for Trigger=1159434
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 Mar 12 21:03:44 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1159434/GCN5_download_cron
======================================================================
Trigger: 01159434 Segment: 000
BAT Trigger Time: 700255520 [s; MET]
Trigger Stop: 700255584 [s; MET]
UTC: 2023-03-11T19:24:49.094260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.066957005906 Dec: -15.8906021868497 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.72
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.72
Flight Position: [ source = BAT ]
RA: 245.066957005906 Dec: -15.8906021868497 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.06376051322 Dec: -15.897581451149 [deg; J2000]
{ 16h 20m 15.3s , -15d 53' 51.3" }
+/- 1.21573880694128 [arcmin] (estimated 90% radius based on SNR)
+/- 0.570162590937613 [arcmin] (formal 1-sigma fit error)
SNR: 23.010072141404
Angular difference between Flight and Ground position is 0.457582 arcmin
Partial Coding Fraction: 0.4570312 [ including projection effects ]
Duration
T90: 115.379999995232 +/- 52.6633451861103
Measured from: -53.3119999170303
to: 62.0680000782013 [s; relative to TRIGTIME]
T50: 42.472000002861 +/- 18.1569677337846
Measured from: -35.663999915123
to: 6.80800008773804 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.24399995803833
to: 6.24399995803833 [s; relative to TRIGTIME]
Total Fluence
Measured from: -55.0319999456406
to: 113.468000054359 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.495866 1.050928 -0.227293 -0.118442
0.167739 0.150050 0.126364 0.106108 [error]
Peak 0.085284 0.025787 0.014057 0.012643
0.013860 0.012042 0.010142 0.008040 [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 3.74e-06 4.63e-07 2.47e-08 1.39e-09 4.23e-06 4.23e-06 erg/cm2
Error 3.56e-07 7.48e-08 1.02e-08 9.89e-10 3.53e-07 3.53e-07 erg/cm2
Peak flux Power-law 1.09e+00 2.72e-01 3.53e-02 5.15e-03 1.40e+00 1.40e+00 ph/cm2/s
Error 2.80e-01 1.24e-01 4.16e-02 1.09e-02 3.47e-01 3.48e-01 ph/cm2/s
Fluence Cutoff-PL 3.75e-06 3.57e-07 1.35e-09 3.73e-14 4.10e-06 4.10e-06 erg/cm2
Error 3.80e-07 1.10e-07 7.98e-09 1.20e-10 3.81e-07 3.81e-07 erg/cm2
Peak flux Cutoff-PL 1.14e+00 2.40e-01 3.75e-03 1.10e-06 1.38e+00 1.38e+00 ph/cm2/s
Error 3.08e-01 2.02e-01 3.86e-02 9.47e-03 3.38e-01 3.38e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.09e+00 2.76e-01 3.41e-02 4.46e-03 1.40e+00 1.40e+00 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 6.225 0.367 - - 1.66e-04 5.59e-05 61.670 57
CPL 1.000 0.000 50.0 0.0 3.12e-03 0.00e+00 428.680 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.943 0.893 - - 2.39e-03 1.94e-03 59.180 57
CPL 1.000 0.000 50.0 0.0 1.87e-02 0.00e+00 84.070 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 168.500 -55.032 113.468
T90 115.380 -53.312 62.068
T50 42.472 -35.664 6.808
Peak 1.000 5.244 6.244
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.0638 -15.8976 0.0083 42.1 1.3 5.4507 23.0 TRIG_01159434
------------------------------------------
Foreground time interval of the image:
-17.599 29.710 (delta_t = 47.309 [sec])
31.000 71.801 (delta_t = 40.801 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
-55.032000 -47.510000
-46.000000 29.710000
31.000000 113.468000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.22485 ( -0.364486 0.369189 )
Norm@50keV : 1.66376E-04 ( -4.82965e-05 6.35122e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.67 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.126385e-01
Photon flux (15-150 keV) in 165.7 sec: 0.858939 ( -0.0777894 0.0783349 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.22934e-06 ( -3.52098e-07 3.54055e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-55.032000 -47.510000
-46.000000 29.710000
31.000000 113.468000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.11661E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 428.68 using 59 PHA bins.
# Reduced chi-squared = 7.6550 for 56 degrees of freedom
# Null hypothesis probability = 7.479867e-59
Photon flux (15-150 keV) in 165.7 sec: 0.840838 ( -0.084715 0.083551 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10376e-06 ( -3.84507e-07 3.78127e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-55.032000 -47.510000
-46.000000 29.710000
31.000000 113.468000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.48759 ( -12.3282 -3.4877 )
beta : -7.13681 ( -1.87863 0.80466 )
Epeak [keV] : 11.0880 ( -1.40625 1.26324 )
Norm@50keV : 2.76264E+04 ( -27815.3 154200 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.39 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 55 degrees of freedom
# Null hypothesis probability = 4.225573e-01
Photon flux (15-150 keV) in 165.7 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] : 2.52802 (-0.160416 0.180406)
R^2/D10^2 : 377.000 (-164.692 282.364)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.40 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 57 degrees of freedom
# Null hypothesis probability = 3.883001e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.714e-06 5.543e-07
25- 50 2.856e-07 5.965e-08
50-150 1.006e-10 6.486e-11
15-150 4.000e-06 5.990e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.37090 (-0.40326 0.479649)
Norm : 324.292 (-123.014 195.554)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.747e-06 5.957e-07
25- 50 3.437e-07 6.703e-08
50-150 8.633e-10 5.157e-10
15-150 4.092e-06 5.791e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.88903 (-2.3256 6.82307)
R1^2/D10^2 : 0.970538 (-0.931582 328.721)
kT2 [keV] : 2.26493 (-2.26781 0.311695)
R2^2/D10^2 : 800.990 (-483.148 -791.021)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.364e-06 1.472e-02
25- 50 5.715e-07 1.669e-01
50-150 2.913e-09 3.810e+00
15-150 2.938e-06 3.678e+00
Peak spectrum fit
Power-law model
Time interval is from 5.244 sec. to 6.244 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.94332 ( -0.770463 1.01552 )
Norm@50keV : 2.39033E-03 ( -0.00155551 0.00232054 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.960463e-01
Photon flux (15-150 keV) in 1 sec: 1.40310 ( -0.34684 0.347694 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.05411e-08 ( -1.44743e-08 1.58739e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.244 sec. to 6.244 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.87444E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.07 using 59 PHA bins.
# Reduced chi-squared = 1.501 for 56 degrees of freedom
# Null hypothesis probability = 8.976476e-03
Photon flux (15-150 keV) in 1 sec: 1.37988 ( -0.33432 0.34203 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59515e-08 ( -1.24027e-08 1.85607e-08 ) ergs/cm2
Band function
Time interval is from 5.244 sec. to 6.244 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.31371 ( 6.45176 9.31371 )
beta : -3.94312 ( -1.01554 0.770788 )
Epeak [keV] : 209.596 ( -209.596 -209.596 )
Norm@50keV : 0.324939 ( -0.211421 0.31539 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.257156e-01
Photon flux (15-150 keV) in 1 sec: 1.40191 ( ) 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] : 3.73641 (-0.812517 1.02973)
R^2/D10^2 : 53.2380 (-53.238 168.321)
(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 3.446e-08 2.022e-08
25- 50 1.020e-08 6.220e-09
50-150 8.093e-11 8.535e-11
15-150 4.474e-08 2.641e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.00619 (-3.15658 5.75631)
Norm : 60.5259 (-36.2541 118.782)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.351e-08 1.844e-08
25- 50 1.247e-08 7.735e-09
50-150 6.351e-10 6.965e-10
15-150 4.662e-08 2.790e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.52673 (-3.52365 1.13906)
R1^2/D10^2 : 69.7203 (-69.8152 -69.8152)
kT2 [keV] : 13.7290 (-13.5974 -13.5974)
R2^2/D10^2 : 2.37921E-02 (-0.0245002 -0.0245002)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.424e-08 1.965e-08
25- 50 1.172e-08 7.050e-09
50-150 4.296e-09 3.658e-09
15-150 5.026e-08 2.803e-08
Plot creation:
Sun Mar 12 21:07:17 EDT 2023