batgrbproduct analysis for trigger=1105560
batgrbproduct Analysis for Trigger=1105560
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): Sat May 7 13:00:14 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1105560/GCN5_download_cron
======================================================================
Trigger: 01105560 Segment: 000
BAT Trigger Time: 673531768 [s; MET]
Trigger Stop: 673531832 [s; MET]
UTC: 2022-05-06T12:08:58.910380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 300.062982027018 Dec: 34.9062820143068 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.32
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.32
Flight Position: [ source = BAT ]
RA: 300.062982027018 Dec: 34.9062820143068 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.10392814119 Dec: 34.8949679045289 [deg; J2000]
{ 20h 00m 24.9s , +34d 53' 41.9" }
+/- 7.26821476643427 [arcmin] (estimated 90% radius based on SNR)
+/- 5.60431792511693 [arcmin] (formal 1-sigma fit error)
SNR: 1.78857561820523
Angular difference between Flight and Ground position is 2.126189 arcmin
Partial Coding Fraction: 0.2441406 [ including projection effects ]
Duration
T90: 230.155999898911 +/- 54.3565144821347
Measured from: 26.2480001449585
to: 256.404000043869 [s; relative to TRIGTIME]
T50: 132.231999874115 +/- 67.8328704734175
Measured from: 57.2760001420975
to: 189.508000016212 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 73.7319999933243
to: 74.7319999933243 [s; relative to TRIGTIME]
Total Fluence
Measured from: 23.5160000324249
to: 266.332000017166 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.604813 4.289925 3.108098 0.459929
0.155246 0.158912 0.137362 0.114455 [error]
Peak 0.028015 0.058150 0.059176 -0.000553
0.015050 0.015797 0.014012 0.012053 [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 1.52e-06 2.17e-06 2.31e-06 4.57e-06 7.43e-06 1.06e-05 erg/cm2
Error 1.13e-07 9.79e-08 1.39e-07 5.81e-07 3.35e-07 6.94e-07 erg/cm2
Peak flux Power-law 5.30e-01 4.59e-01 2.72e-01 2.42e-01 1.37e+00 1.50e+00 ph/cm2/s
Error 2.54e-01 1.49e-01 1.08e-01 1.85e-01 4.41e-01 4.70e-01 ph/cm2/s
Fluence Cutoff-PL 1.34e-06 2.28e-06 2.41e-06 2.19e-06 7.16e-06 8.22e-06 erg/cm2
Error 1.42e-07 1.16e-07 1.56e-07 8.35e-07 3.65e-07 9.09e-07 erg/cm2
Peak flux Cutoff-PL 3.14e-01 5.65e-01 3.24e-01 3.79e-02 1.24e+00 1.24e+00 ph/cm2/s
Error 2.93e-01 1.98e-01 1.48e-01 1.17e-01 4.53e-01 4.62e-01 ph/cm2/s
Fluence Band 1.33e-06 2.27e-06 2.40e-06 2.24e-06 7.16e-06 8.29e-06 erg/cm2
Error 1.30e-07 1.09e-07 -------- -------- -------- -------- erg/cm2
Peak flux Band 3.18e-01 5.62e-01 3.26e-01 3.90e-02 1.25e+00 1.26e+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 1.909 0.079 - - 3.33e-03 1.52e-04 53.870 57
CPL 1.294 0.346 58.7 10.7 6.68e-03 2.66e-03 43.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.756 0.504 - - 1.01e-02 3.31e-03 53.110 57
CPL -0.988 4.064 53.6 51.8 2.39e-01 4.56e+01 49.980 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 242.816 23.516 266.332
T90 230.156 26.248 256.404
T50 132.232 57.276 189.508
Peak 1.000 73.732 74.732
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.1039 +34.8950 0.1079 51.4 -12.4 0.5024 1.8 TRIG_01105560
------------------------------------------
Foreground time interval of the image:
23.516 71.401 (delta_t = 47.885 [sec])
Background time interval of the image:
-17.599 23.516 (delta_t = 41.115 [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
Multiple GTIs in the spectrum
tstart tstop
23.516000 134.407700
135.000000 266.332000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90930 ( -0.0785318 0.079686 )
Norm@50keV : 3.33481E-03 ( -0.000151941 0.000151356 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9451 for 57 degrees of freedom
# Null hypothesis probability = 5.932746e-01
Photon flux (15-150 keV) in 242.2 sec: 0.480481 ( -0.0227315 0.022823 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42638e-06 ( -3.35093e-07 3.35711e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
23.516000 134.407700
135.000000 266.332000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29366 ( -0.359077 0.333682 )
Epeak [keV] : 58.6556 ( -7.73914 13.7223 )
Norm@50keV : 6.68370E-03 ( -0.0020563 0.0032578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.38 using 59 PHA bins.
# Reduced chi-squared = 0.7746 for 56 degrees of freedom
# Null hypothesis probability = 8.910529e-01
Photon flux (15-150 keV) in 242.2 sec: 0.460686 ( -0.024726 0.024858 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16205e-06 ( -3.65238e-07 3.65116e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
23.516000 134.407700
135.000000 266.332000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29361 ( -0.302787 0.342069 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 58.6427 ( -7.73792 13.7235 )
Norm@50keV : 6.68331E-03 ( -0.00205539 0.00325654 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.38 using 59 PHA bins.
# Reduced chi-squared = 0.7887 for 55 degrees of freedom
# Null hypothesis probability = 8.713458e-01
Photon flux (15-150 keV) in 242.2 sec: 0.441183 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16234e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3590 ( )
R^2/D10^2 : 7.38316E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 144.17 using 59 PHA bins.
# Reduced chi-squared = 2.5294 for 57 degrees of freedom
# Null hypothesis probability = 1.692566e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.763e-07 5.728e-08
25- 50 2.398e-06 1.258e-07
50-150 2.748e-06 2.277e-07
15-150 5.822e-06 2.810e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.5640 (-12.3506 15.576)
Norm : 2.12176 (-0.142098 0.154084)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.342e-06 1.173e-07
25- 50 2.283e-06 1.016e-07
50-150 3.537e-06 9.191e-07
15-150 7.162e-06 9.010e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.08710 (-0.864692 1.0603)
R1^2/D10^2 : 1.73881 (-0.925478 2.26903)
kT2 [keV] : 18.2242 (-1.62764 2.16231)
R2^2/D10^2 : 1.88951E-02 (-0.00724906 0.00918715)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.400e-06 3.420e-07
25- 50 2.162e-06 2.725e-07
50-150 3.454e-06 3.669e-07
15-150 7.016e-06 7.218e-07
Peak spectrum fit
Power-law model
Time interval is from 73.732 sec. to 74.732 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75570 ( -0.482386 0.52514 )
Norm@50keV : 1.00821E-02 ( -0.00333746 0.00328058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 57 degrees of freedom
# Null hypothesis probability = 6.216175e-01
Photon flux (15-150 keV) in 1 sec: 1.36598 ( -0.439146 0.443173 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.30146e-08 ( -3.08736e-08 3.1482e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 73.732 sec. to 74.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.988273 ( -5.45547 2.67184 )
Epeak [keV] : 53.6029 ( -14.8224 88.7908 )
Norm@50keV : 0.239261 ( -0.252706 90.8576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.8925 for 56 degrees of freedom
# Null hypothesis probability = 7.009033e-01
Photon flux (15-150 keV) in 1 sec: 1.23749 ( -0.445212 0.46085 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.38794e-08 ( -2.87553e-08 3.20676e-08 ) ergs/cm2
Band function
Time interval is from 73.732 sec. to 74.732 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.883001 ( -2.69815 -0.883052 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 54.1063 ( -14.7188 75.9782 )
Norm@50keV : 0.207106 ( -0.212528 341.662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.9091 for 55 degrees of freedom
# Null hypothesis probability = 6.656341e-01
Photon flux (15-150 keV) in 1 sec: 1.24521 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.39386e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.6520 (-3.35694 4.45168)
R^2/D10^2 : 0.229602 (-0.229602 0.41461)
(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 9.058e-09 5.785e-09
25- 50 3.284e-08 1.973e-08
50-150 3.978e-08 2.478e-08
15-150 8.168e-08 4.991e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 110.222 (-62.4313 -107.892)
Norm : 5.97916 (-2.12394 3.18557)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.561e-08 9.650e-09
25- 50 2.751e-08 1.642e-08
50-150 4.702e-08 3.535e-08
15-150 9.014e-08 5.915e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.386963 (-2.57942 36.8254)
R1^2/D10^2 : 4.35395E+14 (-4.59333e+14 3.30742e+20)
kT2 [keV] : 13.8476 (-3.40412 4.55533)
R2^2/D10^2 : 0.215546 (-0.143567 0.345942)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.126e-08 5.930e-09
25- 50 3.157e-08 1.871e-08
50-150 4.098e-08 2.578e-08
15-150 8.381e-08 5.020e-08
Plot creation:
Sat May 7 13:03:02 EDT 2022