batgrbproduct analysis for trigger=1042113
batgrbproduct Analysis for Trigger=1042113
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 Apr 10 23:36:21 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1042113/batgroup_hand_proc
======================================================================
Trigger: 01042113 Segment: 000
BAT Trigger Time: 639708823.296 [s; MET]
Trigger Stop: 639708823.36 [s; MET]
UTC: 2021-04-10T00:53:16.478000 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 269.752937386226 Dec: 45.3707068254686 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.24
Image Trigger?: NO
Rate S/N Ratio: 58.9915248150105 [ if not an image trigger ]
Image S/N Ratio: 7.24
Flight Position: [ source = BAT ]
RA: 269.752937386226 Dec: 45.3707068254686 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 269.740994496425 Dec: 45.358874981224 [deg; J2000]
{ 17h 58m 57.8s , +45d 21' 31.9" }
+/- 0.739746787136268 [arcmin] (estimated 90% radius based on SNR)
+/- 0.278852168624886 [arcmin] (formal 1-sigma fit error)
SNR: 46.7888682640872
Angular difference between Flight and Ground position is 0.870312 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 52.8759999275208 +/- 4.14596475750822
Measured from: 0.684000015258789
to: 53.5599999427795 [s; relative to TRIGTIME]
T50: 21.0199998617172 +/- 1.57035024751302
Measured from: 4.08000004291534
to: 25.0999999046326 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.73599994182587
to: 2.73599994182587 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00399994850158691
to: 66.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.588350 2.433746 2.608836 1.084433
0.062638 0.066119 0.062206 0.054314 [error]
Peak 0.063677 0.121140 0.245373 0.118505
0.010664 0.012466 0.014378 0.013476 [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 4.36e-07 1.06e-06 2.06e-06 9.80e-06 5.56e-06 1.34e-05 erg/cm2
Error 2.94e-08 4.08e-08 6.26e-08 7.53e-07 1.64e-07 7.68e-07 erg/cm2
Peak flux Power-law 5.20e-01 9.72e-01 1.40e+00 4.29e+00 3.99e+00 7.18e+00 ph/cm2/s
Error 1.08e-01 1.21e-01 1.07e-01 7.93e-01 3.15e-01 7.65e-01 ph/cm2/s
Fluence Cutoff-PL 4.37e-07 1.06e-06 2.06e-06 9.69e-06 5.56e-06 1.32e-05 erg/cm2
Error 2.94e-08 4.10e-08 6.28e-08 -------- 1.64e-07 -------- erg/cm2
Peak flux Cutoff-PL 5.24e-01 9.77e-01 1.40e+00 4.23e+00 3.99e+00 7.13e+00 ph/cm2/s
Error -------- -------- 1.08e-01 1.16e+00 3.15e-01 1.16e+00 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 1.045 0.056 - - 7.90e-03 2.32e-04 62.930 0
CPL 1.039 0.057 10000.0 0.0 7.95e-03 2.27e-04 63.240 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.471 0.156 - - 3.35e-02 3.03e-03 50.850 0
CPL 0.467 0.158 9999.4 0.0 3.38e-02 9.89e-03 0.669 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: 45.568000 sec.
T50 in the 50-300 keV band: 14.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 66.068 -0.004 66.064
T90 52.876 0.684 53.560
T50 21.020 4.080 25.100
Peak 1.000 1.736 2.736
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
269.7410 +45.3589 0.0041 31.7 156.0 3.6141 46.8 TRIG_01042113
------------------------------------------
Foreground time interval of the image:
-0.004 8.605 (delta_t = 8.609 [sec])
Background time interval of the image:
-160.195 -0.004 (delta_t = 160.191 [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 -0.004 sec. to 66.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04452 ( -0.0563182 0.0558004 )
Norm@50keV : 7.90204E-03 ( -0.000232745 0.000231951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.93 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.75e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 66.07 sec: 0.912287 ( -0.0281303 0.0282877 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.55916e-06 ( -1.63858e-07 1.64182e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 66.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03889 ( -0.0634935 0.0504123 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 7.94651E-03 ( -0.000233217 0.000221563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.36e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 66.07 sec: 0.913242 ( -0.029749 0.026987 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.55783e-06 ( -1.61819e-07 1.66959e-07 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 66.064 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.841990 ( 0.84199 0.84199 )
beta : -1.04451 ( -0.0557995 0.0563243 )
Epeak [keV] : 54.2531 ( -54.2531 -54.2531 )
Norm@50keV : 1.35478E-02 ( -0.00465198 0 )
------------------------------------------------------------
Photon flux (15-150 keV) in 66.07 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] : 24.0643 ( )
R^2/D10^2 : 2.34492E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 360.49 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.17e-45 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.590e-07 9.877e-09
25- 50 8.841e-07 4.228e-08
50-150 3.814e-06 1.715e-07
15-150 4.857e-06 1.715e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 3.93226 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 332.70 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.42e-40 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.469e-07 1.969e-08
25- 50 1.244e-06 3.733e-08
50-150 2.729e-06 8.325e-08
15-150 4.621e-06 1.493e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.63332 (-0.917256 1.01251)
R1^2/D10^2 : 0.397417 (-0.119138 0.182422)
kT2 [keV] : 45.3518 (-5.75561 8.60345)
R2^2/D10^2 : 3.16605E-03 (-0.00115764 0.00147001)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.47e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.229e-07 4.390e-08
25- 50 1.098e-06 6.904e-08
50-150 4.198e-06 3.882e-07
15-150 5.718e-06 4.407e-07
Peak spectrum fit
Power-law model
Time interval is from 1.736 sec. to 2.736 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.471297 ( -0.159473 0.152676 )
Norm@50keV : 3.34853E-02 ( -0.00306073 0.00299067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.85 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.04e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.98508 ( -0.314149 0.315309 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.56528e-07 ( -3.75058e-08 3.76617e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.736 sec. to 2.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.466685 ( -0.165847 0.149825 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.38239E-02 ( -0.00287462 0.0169132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.88 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.69e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.98865 ( -0.31901 0.31093 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.56219e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.736 sec. to 2.736 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.686337 ( 0.686337 0.686337 )
beta : -0.471309 ( -0.152764 0.159485 )
Epeak [keV] : 22.5084 ( -22.5084 -22.5084 )
Norm@50keV : 4.46026E-02 ( -0.013904 286019 )
------------------------------------------------------------
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] : 35.4868 (-4.46669 5.77615)
R^2/D10^2 : 4.09424E-02 (-0.0129768 0.0174503)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.82 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.75e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.234e-09 1.176e-09
25- 50 4.751e-08 6.855e-09
50-150 3.884e-07 4.500e-08
15-150 4.431e-07 4.530e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 ( )
Norm : 14.3319 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 183.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.82e-15 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.569e-08 6.065e-09
25- 50 6.865e-08 3.701e-08
50-150 1.506e-07 8.125e-08
15-150 2.549e-07 1.244e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.69720 (-1.88933 3.1394)
R1^2/D10^2 : 3.90481 (-3.11811 17.9361)
kT2 [keV] : 43.8376 (-7.49102 12.9119)
R2^2/D10^2 : 2.28857E-02 (-0.0106194 0.0141399)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.52e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.088e-08 1.011e-08
25- 50 5.098e-08 1.349e-08
50-150 3.964e-07 7.690e-08
15-150 4.683e-07 9.635e-08
Plot creation:
Sat Apr 10 23:48:26 EDT 2021