batgrbproduct analysis for trigger=1040123
batgrbproduct Analysis for Trigger=1040123
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 Apr 4 16:33:16 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1040123/batgroup_hand_proc
======================================================================
Trigger: 01040123 Segment: 000
BAT Trigger Time: 639093824 [s; MET]
Trigger Stop: 639093896 [s; MET]
UTC: 2021-04-02T22:03:17.222860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.259947568503 Dec: 44.5125955041343 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 24.08
Flight Position: [ source = BAT ]
RA: 198.259947568503 Dec: 44.5125955041343 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 198.284004852498 Dec: 44.5104633983967 [deg; J2000]
{ 13h 13m 08.2s , +44d 30' 37.7" }
+/- 1.06246637791054 [arcmin] (estimated 90% radius based on SNR)
+/- 0.367303168463644 [arcmin] (formal 1-sigma fit error)
SNR: 27.8949279165214
Angular difference between Flight and Ground position is 1.037247 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 238.707999944687 +/- 18.7908142212934
Measured from: 1.15600001811981
to: 239.863999962807 [s; relative to TRIGTIME]
T50: 132.703999996185 +/- 7.47823423873571
Measured from: 52.095999956131
to: 184.799999952316 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 173.531999945641
to: 174.531999945641 [s; relative to TRIGTIME]
Total Fluence
Measured from: -51.6039999723434
to: 310.200000047684 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.112066 6.090382 3.590196 0.635886
0.129970 0.136692 0.127648 0.131169 [error]
Peak 0.064726 0.067652 0.049890 0.016135
0.006882 0.007536 0.006723 0.006457 [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 1.76e-06 2.57e-06 2.81e-06 5.73e-06 8.90e-06 1.29e-05 erg/cm2
Error 9.90e-08 8.28e-08 1.32e-07 5.88e-07 2.99e-07 6.82e-07 erg/cm2
Peak flux Power-law 6.03e-01 5.48e-01 3.43e-01 3.29e-01 1.63e+00 1.82e+00 ph/cm2/s
Error 1.12e-01 6.26e-02 5.80e-02 1.13e-01 1.84e-01 2.10e-01 ph/cm2/s
Fluence Cutoff-PL 1.64e-06 2.65e-06 2.82e-06 3.23e-06 8.56e-06 1.03e-05 erg/cm2
Error 1.25e-07 9.77e-08 1.39e-07 1.24e-06 3.75e-07 1.32e-06 erg/cm2
Peak flux Cutoff-PL 6.12e-01 5.49e-01 3.39e-01 3.16e-01 1.63e+00 1.82e+00 ph/cm2/s
Error 1.13e-01 6.28e-02 5.80e-02 1.08e-01 1.84e-01 2.25e-01 ph/cm2/s
Fluence Band 1.59e-06 2.67e-06 2.76e-06 4.59e-06 8.58e-06 1.16e-05 erg/cm2
Error 1.05e-07 1.10e-07 -------- -------- 3.58e-07 -------- 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 1.875 0.063 - - 2.68e-03 8.99e-05 65.100 0
CPL 1.492 0.272 63.6 22.9 4.19e-03 1.35e-03 58.820 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.674 0.217 - - 1.24e-02 1.57e-03 36.610 0
CPL 1.682 0.219 9999.4 -0.0 1.23e-02 1.02e-02 0.979 0
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: 224.128000 sec.
T50 in the 50-300 keV band: 130.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 361.804 -51.604 310.200
T90 238.708 1.156 239.864
T50 132.704 52.096 184.800
Peak 1.000 173.532 174.532
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
198.2840 +44.5105 0.0069 31.3 3.7 7.0621 27.9 TRIG_01040123
------------------------------------------
Foreground time interval of the image:
-51.604 80.701 (delta_t = 132.305 [sec])
Background time interval of the image:
-239.000 -51.604 (delta_t = 187.396 [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 -51.604 sec. to 310.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87482 ( -0.0631138 0.0637152 )
Norm@50keV : 2.67504E-03 ( -9.00402e-05 8.96673e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.16e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 361.8 sec: 0.379858 ( -0.012792 0.012839 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.89724e-06 ( -2.98803e-07 2.9994e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -51.604 sec. to 310.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49207 ( -0.281023 0.263714 )
Epeak [keV] : 63.5939 ( -10.18 35.6882 )
Norm@50keV : 4.18862E-03 ( -0.00109055 0.00160382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.82 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.73e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 361.8 sec: 0.368205 ( -0.014833 0.014928 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.56164e-06 ( -3.74282e-07 3.7497e-07 ) ergs/cm2
Band function
Time interval is from -51.604 sec. to 310.200 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25162 ( -0.454535 1.45246 )
beta : -2.08720 ( 2.08692 0.17668 )
Epeak [keV] : 51.0647 ( -19.3862 34.2762 )
Norm@50keV : 5.85637E-03 ( -0.0025847 0.056593 )
------------------------------------------------------------
Photon flux (15-150 keV) in 361.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.57766e-06 ( -8.57513e-06 -3.58508e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.2669 ( )
R^2/D10^2 : 7.77164E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 235.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.44e-23 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.963e-07 5.590e-08
25- 50 2.894e-06 1.042e-07
50-150 2.656e-06 1.986e-07
15-150 6.446e-06 2.297e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.1538 (-10.696 13.0887)
Norm : 1.66277 (-0.0435061 0.0913295)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.67e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.571e-06 9.859e-08
25- 50 2.677e-06 1.040e-07
50-150 4.163e-06 1.028e-06
15-150 8.411e-06 1.067e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.75980 (-0.819385 0.849149)
R1^2/D10^2 : 0.494804 (-0.161335 0.28713)
kT2 [keV] : 22.2091 (-2.82407 4.00644)
R2^2/D10^2 : 6.14132E-03 (-0.00291111 0.00453357)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.98 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.48e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.467e-06 1.603e-07
25- 50 2.692e-06 2.160e-07
50-150 4.194e-06 6.279e-07
15-150 8.353e-06 7.743e-07
Peak spectrum fit
Power-law model
Time interval is from 173.532 sec. to 174.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67376 ( -0.212849 0.221215 )
Norm@50keV : 1.23954E-02 ( -0.00158635 0.00154627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.84e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.63145 ( -0.184351 0.184526 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15021e-07 ( -1.55211e-08 1.57643e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 173.532 sec. to 174.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68237 ( -0.221582 0.215544 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 1.23401E-02 ( -0.0109152 0.00953465 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.79e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.63298 ( -0.1858 0.18293 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14228e-07 ( -1.48629e-08 1.6324e-08 ) ergs/cm2
Band function
Time interval is from 173.532 sec. to 174.532 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38640 ( 1.3864 1.3864 )
beta : -1.67375 ( 1.67375 0.212524 )
Epeak [keV] : 17.9791 ( -17.9785 -17.9785 )
Norm@50keV : 2.75659E-02 ( -0.014328 1.86731 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 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] : 13.5503 (-2.05413 2.43584)
R^2/D10^2 : 0.249426 (-0.110031 0.198076)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.72e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.698e-09 2.257e-09
25- 50 3.490e-08 5.975e-09
50-150 4.147e-08 1.051e-08
15-150 8.606e-08 1.360e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.113 (-66.0901 -157.231)
Norm : 6.66200 (-0.822787 1.00203)
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.74 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.69e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.704e-08 9.285e-09
25- 50 3.180e-08 1.530e-08
50-150 6.395e-08 3.668e-08
15-150 1.128e-07 5.785e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.25252 (-1.30055 1.23932)
R1^2/D10^2 : 13.9329 (-10.9101 74.1521)
kT2 [keV] : 21.3958 (-4.53666 8.62989)
R2^2/D10^2 : 4.25606E-02 (-0.029393 0.0388263)
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.74e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.057e-08 1.015e-08
25- 50 2.623e-08 9.645e-09
50-150 6.499e-08 2.340e-08
15-150 1.118e-07 3.825e-08
Plot creation:
Sun Apr 4 16:47:51 EDT 2021