batgrbproduct analysis for trigger=1150429
batgrbproduct Analysis for Trigger=1150429
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): Tue Jan 24 14:15:13 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1150429/GCN5_download_cron
======================================================================
Trigger: 01150429 Segment: 000
BAT Trigger Time: 696162015.552 [s; MET]
Trigger Stop: 696162016.576 [s; MET]
UTC: 2023-01-23T10:19:44.925060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 40.9365532507019 Dec: -65.6760457513921 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.59
Image Trigger?: NO
Rate S/N Ratio: 12.6095202129185 [ if not an image trigger ]
Image S/N Ratio: 7.59
Flight Position: [ source = BAT ]
RA: 40.9365532507019 Dec: -65.6760457513921 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 40.9053704106184 Dec: -65.6610942318393 [deg; J2000]
{ 02h 43m 37.3s , -65d 39' 39.9" }
+/- 1.77301731578033 [arcmin] (estimated 90% radius based on SNR)
+/- 0.661129993996757 [arcmin] (formal 1-sigma fit error)
SNR: 13.4219039639922
Angular difference between Flight and Ground position is 1.182797 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 5.36800003051758 +/- 1.02880127862106
Measured from: -0.891999959945679
to: 4.4760000705719 [s; relative to TRIGTIME]
T50: 2.48399996757507 +/- 0.74595452121961
Measured from: 0.372000098228455
to: 2.85600006580353 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.115999937057495
to: 1.1159999370575 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.24800002574921
to: 4.74799990653992 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.203479 0.214779 0.085670 0.047095
0.023249 0.023734 0.019473 0.015514 [error]
Peak 0.045125 0.057195 0.025704 0.017025
0.010035 0.010628 0.008202 0.006488 [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 6.26e-08 8.18e-08 7.84e-08 1.33e-07 2.67e-07 3.56e-07 erg/cm2
Error 1.05e-08 1.05e-08 1.80e-08 5.93e-08 4.14e-08 8.06e-08 erg/cm2
Peak flux Power-law 4.62e-01 3.82e-01 2.14e-01 1.77e-01 1.14e+00 1.24e+00 ph/cm2/s
Error 1.35e-01 7.72e-02 6.57e-02 1.05e-01 2.30e-01 2.53e-01 ph/cm2/s
Fluence Cutoff-PL 6.05e-08 8.84e-08 7.40e-08 4.32e-08 2.49e-07 2.66e-07 erg/cm2
Error 1.15e-08 1.55e-08 2.25e-08 7.38e-08 4.92e-08 1.09e-07 erg/cm2
Peak flux Cutoff-PL 4.53e-01 3.94e-01 2.15e-01 1.25e-01 1.13e+00 1.19e+00 ph/cm2/s
Error 1.45e-01 1.01e-01 5.32e-02 1.48e-01 2.32e-01 2.82e-01 ph/cm2/s
Fluence Band 5.94e-08 8.95e-08 7.18e-08 7.54e-08 2.52e-07 2.97e-07 erg/cm2
Error 1.15e-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 2.062 0.239 - - 4.81e-03 8.05e-04 29.700 57
CPL 1.445 1.035 35.2 0.0 1.13e-02 0.00e+00 28.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.835 0.358 - - 8.13e-03 1.93e-03 47.730 57
CPL 1.598 1.267 72.7 -0.0 1.12e-02 7.54e-02 47.640 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: 7.296000 sec.
T50 in the 50-300 keV band: 3.072000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.996 -1.248 4.748
T90 5.368 -0.892 4.476
T50 2.484 0.372 2.856
Peak 1.000 0.116 1.116
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
40.9054 -65.6611 0.0144 17.3 135.9 0.5366 13.4 TRIG_01150429
------------------------------------------
Foreground time interval of the image:
-1.248 4.748 (delta_t = 5.996 [sec])
Background time interval of the image:
-239.552 -1.248 (delta_t = 238.304 [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 -1.248 sec. to 4.748 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06197 ( -0.230272 0.247894 )
Norm@50keV : 4.81049E-03 ( -0.000816236 0.000793833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.70 using 59 PHA bins.
# Reduced chi-squared = 0.5211 for 57 degrees of freedom
# Null hypothesis probability = 9.989440e-01
Photon flux (15-150 keV) in 5.996 sec: 0.742918 ( -0.0924449 0.0924461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67089e-07 ( -4.08322e-08 4.1993e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.248 sec. to 4.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44538 ( -1.388 0.682195 )
Epeak [keV] : 35.2380 ( )
Norm@50keV : 1.13430E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.76 using 59 PHA bins.
# Reduced chi-squared = 0.5136 for 56 degrees of freedom
# Null hypothesis probability = 9.990573e-01
Photon flux (15-150 keV) in 5.996 sec: 0.728535 ( -0.095644 0.091844 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49223e-07 ( -4.66765e-08 5.17173e-08 ) ergs/cm2
Band function
Time interval is from -1.248 sec. to 4.748 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21075 ( 1.19633 1.19633 )
beta : -2.58785 ( 2.58513 0.686408 )
Epeak [keV] : 34.6419 ( -34.4663 19.7285 )
Norm@50keV : 1.61151E-02 ( -0.00870243 1178.01 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.33 using 59 PHA bins.
# Reduced chi-squared = 0.5151 for 55 degrees of freedom
# Null hypothesis probability = 9.989187e-01
Photon flux (15-150 keV) in 5.996 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51933e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.17523 (-1.23679 1.42185)
R^2/D10^2 : 0.485362 (-0.208493 0.367)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.34 using 59 PHA bins.
# Reduced chi-squared = 0.6726 for 57 degrees of freedom
# Null hypothesis probability = 9.727013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.816e-08 9.456e-09
25- 50 1.055e-07 1.760e-08
50-150 4.267e-08 1.599e-08
15-150 1.963e-07 3.430e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.6868 (-17.3983 30.3931)
Norm : 4.01262 (-0.794502 0.991337)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.988e-08 1.018e-08
25- 50 8.952e-08 1.361e-08
50-150 9.707e-08 3.741e-08
15-150 2.465e-07 4.731e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.81832 (-2.59184 4.31634)
R1^2/D10^2 : 3.51193 (-3.00193 131.579)
kT2 [keV] : 14.1435 (-4.2786 -14.1923)
R2^2/D10^2 : 6.54996E-02 (-0.0643088 0.181186)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.064e-08 3.199e-08
25- 50 8.852e-08 4.617e-08
50-150 8.335e-08 4.962e-08
15-150 2.325e-07 1.209e-07
Peak spectrum fit
Power-law model
Time interval is from 0.116 sec. to 1.116 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83461 ( -0.344705 0.371287 )
Norm@50keV : 8.13469E-03 ( -0.00197083 0.00189401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.73 using 59 PHA bins.
# Reduced chi-squared = 0.8373 for 57 degrees of freedom
# Null hypothesis probability = 8.043398e-01
Photon flux (15-150 keV) in 1 sec: 1.13634 ( -0.230013 0.230061 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.48145e-08 ( -1.77143e-08 1.81842e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.116 sec. to 1.116 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59815 ( -1.89347 0.640495 )
Epeak [keV] : 72.7146 ( -73.1311 -73.1668 )
Norm@50keV : 1.11525E-02 ( -0.0111095 0.139605 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8507 for 56 degrees of freedom
# Null hypothesis probability = 7.791372e-01
Photon flux (15-150 keV) in 1 sec: 1.13058 ( -0.2329 0.23143 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.31815e-08 ( -2.02384e-08 1.9511e-08 ) ergs/cm2
Band function
Time interval is from 0.116 sec. to 1.116 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.99908 ( -0.600771 0.415464 )
Epeak [keV] : 23.1737 ( -23.1726 6.76686 )
Norm@50keV : 1963.85 ( -393.087 9.64459e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.73 using 59 PHA bins.
# Reduced chi-squared = 0.8496 for 55 degrees of freedom
# Null hypothesis probability = 7.786905e-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] : 10.3697 (-2.20772 2.88439)
R^2/D10^2 : 0.478822 (-0.291265 0.70108)
(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 1.061e-08 4.312e-09
25- 50 2.773e-08 9.190e-09
50-150 1.606e-08 8.110e-09
15-150 5.440e-08 2.055e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.4075 (-43.4761 -89.4078)
Norm : 5.20718 (-1.26634 1.90247)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.358e-08 4.276e-09
25- 50 2.294e-08 9.443e-09
50-150 3.479e-08 2.658e-08
15-150 7.132e-08 3.292e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.16119 (-4.40759 3.55446)
R1^2/D10^2 : 1.51307 (-0.96646 29.7035)
kT2 [keV] : 30.5383 (-26.4425 -35.0744)
R2^2/D10^2 : 5.61923E-03 (-0.00355395 0.265374)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.357e-08 8.125e-09
25- 50 2.329e-08 1.343e-08
50-150 3.623e-08 2.206e-08
15-150 7.309e-08 3.882e-08
Plot creation:
Tue Jan 24 14:18:05 EST 2023