batgrbproduct analysis for trigger=1141030
batgrbproduct Analysis for Trigger=1141030
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): Mon Nov 21 15:00:18 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1141030/GCN5_download_cron
======================================================================
Trigger: 01141030 Segment: 000
BAT Trigger Time: 690672598.4 [s; MET]
Trigger Stop: 690672598.656 [s; MET]
UTC: 2022-11-20T21:29:28.146920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 41.3447019871665 Dec: 43.2031229320889 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.27
Image Trigger?: NO
Rate S/N Ratio: 26.7768556779918 [ if not an image trigger ]
Image S/N Ratio: 7.27
Flight Position: [ source = BAT ]
RA: 41.3447019871665 Dec: 43.2031229320889 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.3630898891144 Dec: 43.2407041430761 [deg; J2000]
{ 02h 45m 27.1s , +43d 14' 26.5" }
+/- 1.84839221753588 [arcmin] (estimated 90% radius based on SNR)
+/- 0.853052547642673 [arcmin] (formal 1-sigma fit error)
SNR: 12.6468948203448
Angular difference between Flight and Ground position is 2.393911 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 0.79200005531311 +/- 0.1600999894275
Measured from: -0.543999910354614
to: 0.248000144958496 [s; relative to TRIGTIME]
T50: 0.471999883651733 +/- 0.0824621495203577
Measured from: -0.327999830245972
to: 0.144000053405762 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.666000008583069
to: 0.333999991416931 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.603999972343445
to: 0.272000074386597 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.028551 0.046909 0.058329 0.024444
0.006746 0.007405 0.007526 0.006376 [error]
Peak 0.029178 0.048341 0.057230 0.023618
0.007170 0.007756 0.007800 0.006670 [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 6.98e-09 1.91e-08 4.24e-08 2.49e-07 1.14e-07 3.17e-07 erg/cm2
Error 2.19e-09 3.51e-09 6.75e-09 9.64e-08 1.83e-08 9.93e-08 erg/cm2
Peak flux Power-law 2.29e-01 3.35e-01 3.67e-01 7.51e-01 1.16e+00 1.68e+00 ph/cm2/s
Error 7.63e-02 6.63e-02 5.93e-02 2.83e-01 1.76e-01 3.02e-01 ph/cm2/s
Fluence Cutoff-PL 6.99e-09 1.92e-08 4.25e-08 2.29e-07 1.14e-07 2.97e-07 erg/cm2
Error 1.75e-09 2.75e-09 7.35e-09 1.77e-07 1.87e-08 1.41e-07 erg/cm2
Peak flux Cutoff-PL 2.29e-01 3.36e-01 3.67e-01 7.46e-01 1.16e+00 1.68e+00 ph/cm2/s
Error 7.71e-02 6.62e-02 6.16e-02 2.83e-01 1.76e-01 3.72e-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 0.852 0.268 - - 1.14e-02 1.68e-03 55.150 57
CPL 0.851 0.270 9999.4 0.0 1.15e-02 1.06e-02 55.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.872 0.285 - - 1.01e-02 1.54e-03 48.080 57
CPL 0.871 0.390 9999.4 0.0 1.02e-02 6.85e-03 48.100 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.876 -0.604 0.272
T90 0.792 -0.544 0.248
T50 0.472 -0.328 0.144
Peak 1.000 -0.666 0.334
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
41.3631 +43.2407 0.0152 15.0 -25.7 0.1830 12.6 TRIG_01141030
------------------------------------------
Foreground time interval of the image:
-0.604 0.272 (delta_t = 0.876 [sec])
Background time interval of the image:
-84.999 -0.604 (delta_t = 84.395 [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 -0.604 sec. to 0.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.851557 ( -0.275151 0.261041 )
Norm@50keV : 1.14195E-02 ( -0.00169227 0.00167557 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9676 for 57 degrees of freedom
# Null hypothesis probability = 5.446049e-01
Photon flux (15-150 keV) in 0.876 sec: 1.31084 ( -0.191828 0.192335 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14441e-07 ( -1.8249e-08 1.84274e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.604 sec. to 0.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.850525 ( -0.281112 0.259482 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.15013E-02 ( -0.0016705 0.0194917 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9850 for 56 degrees of freedom
# Null hypothesis probability = 5.066844e-01
Photon flux (15-150 keV) in 0.876 sec: 1.31119 ( -0.19252 0.18976 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1418e-07 ( -1.87166e-08 1.8756e-08 ) ergs/cm2
Band function
Time interval is from -0.604 sec. to 0.272 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.815203 ( 0.815203 0.815203 )
beta : -0.851558 ( -0.260992 0.275152 )
Epeak [keV] : 17.3225 ( -17.3225 -17.3225 )
Norm@50keV : 1.59792E-02 ( -0.0062067 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.687681e-01
Photon flux (15-150 keV) in 0.876 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] : 24.7661 (-4.85637 6.92122)
R^2/D10^2 : 3.34239E-02 (-0.017109 0.031248)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.78 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.504936e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.135e-09 9.846e-10
25- 50 1.770e-08 4.621e-09
50-150 8.061e-08 2.203e-08
15-150 1.014e-07 2.277e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-34.6191 -200)
Norm : 5.09785 (-0.787226 0.787226)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.112e-08 6.443e-09
25- 50 2.138e-08 1.215e-08
50-150 4.690e-08 2.621e-08
15-150 7.940e-08 4.503e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.86311 (-4.36866 5.18967)
R1^2/D10^2 : 0.423207 (-0.33961 1.49917)
kT2 [keV] : 43.3798 (-16.8466 -43.5161)
R2^2/D10^2 : 5.80984E-03 (-0.00481553 0.0188685)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.789e-09 4.104e-09
25- 50 1.980e-08 1.055e-08
50-150 8.975e-08 4.919e-08
15-150 1.163e-07 5.931e-08
Peak spectrum fit
Power-law model
Time interval is from -0.666 sec. to 0.334 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.871692 ( -0.29259 0.276733 )
Norm@50keV : 1.01170E-02 ( -0.00155065 0.00153447 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.08 using 59 PHA bins.
# Reduced chi-squared = 0.8436 for 57 degrees of freedom
# Null hypothesis probability = 7.938004e-01
Photon flux (15-150 keV) in 1 sec: 1.16113 ( -0.176027 0.176754 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14812e-07 ( -1.90619e-08 1.92538e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.666 sec. to 0.334 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.871277 ( -0.50723 0.273016 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.01920E-02 ( -0.00153885 0.0121614 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.10 using 59 PHA bins.
# Reduced chi-squared = 0.8589 for 56 degrees of freedom
# Null hypothesis probability = 7.645998e-01
Photon flux (15-150 keV) in 1 sec: 1.16088 ( -0.176321 0.17637 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14417e-07 ( -1.86837e-08 9.884e-09 ) ergs/cm2
Band function
Time interval is from -0.666 sec. to 0.334 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.872379 ( 0.872383 0.872383 )
beta : -0.871691 ( -0.276479 0.29259 )
Epeak [keV] : 14.1958 ( -14.1958 -14.1958 )
Norm@50keV : 1.49452E-02 ( -0.00635349 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.08 using 59 PHA bins.
# Reduced chi-squared = 0.8743 for 55 degrees of freedom
# Null hypothesis probability = 7.339906e-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] : 24.8846 (-5.22791 7.71935)
R^2/D10^2 : 2.87828E-02 (-0.0155799 0.0299654)
(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 3.104e-09 9.245e-10
25- 50 1.757e-08 5.628e-09
50-150 8.072e-08 2.558e-08
15-150 1.014e-07 3.036e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.9955 -200)
Norm : 4.55223 (-0.72393 0.72393)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.133e-08 6.480e-09
25- 50 2.180e-08 1.238e-08
50-150 4.782e-08 2.688e-08
15-150 8.096e-08 4.576e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.36941 (-3.67021 6.94426)
R1^2/D10^2 : 0.493929 (-0.397335 3.04895)
kT2 [keV] : 47.1284 (-19.3693 -47.1291)
R2^2/D10^2 : 4.20927E-03 (-0.00342351 0.0147397)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.525e-09 4.380e-09
25- 50 1.982e-08 1.054e-08
50-150 9.137e-08 4.836e-08
15-150 1.187e-07 6.030e-08
Plot creation:
Mon Nov 21 15:03:33 EST 2022