batgrbproduct analysis for trigger=1036139
batgrbproduct Analysis for Trigger=1036139
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 Mar 8 20:44:12 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1036139/batgroup_hand_proc
======================================================================
Trigger: 01036139 Segment: 000
BAT Trigger Time: 636799385.024 [s; MET]
Trigger Stop: 636799387.072 [s; MET]
UTC: 2021-03-07T08:42:38.399080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 119.190405236675 Dec: -66.9627274070328 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.9
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 7.9
Flight Position: [ source = BAT ]
RA: 119.190405236675 Dec: -66.9627274070328 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 119.243823336774 Dec: -66.9650787206901 [deg; J2000]
{ 07h 56m 58.5s , -66d 57' 54.3" }
+/- 2.13801572556626 [arcmin] (estimated 90% radius based on SNR)
+/- 1.07990315813556 [arcmin] (formal 1-sigma fit error)
SNR: 10.2724549176741
Angular difference between Flight and Ground position is 1.262095 arcmin
Partial Coding Fraction: 0.796875 [ including projection effects ]
Duration
T90: 261.963999986649 +/- 82.7909011732207
Measured from: -128.844000101089
to: 133.119999885559 [s; relative to TRIGTIME]
T50: 114.072000026703 +/- 61.7432991387992
Measured from: -9.1120001077652
to: 104.959999918938 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.27199995517731
to: 2.27199995517731 [s; relative to TRIGTIME]
Total Fluence
Measured from: -159.612000107765
to: 174.531999945641 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.318492 1.684187 1.309772 0.216830
0.141476 0.143699 0.126163 0.116145 [error]
Peak 0.024958 0.034841 0.056145 0.006404
0.008467 0.009168 0.008149 0.006959 [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 4.05e-07 7.19e-07 9.77e-07 2.74e-06 2.83e-06 4.84e-06 erg/cm2
Error 6.24e-08 6.78e-08 1.24e-07 7.43e-07 2.96e-07 8.42e-07 erg/cm2
Peak flux Power-law 2.73e-01 3.20e-01 2.69e-01 3.84e-01 1.00e+00 1.25e+00 ph/cm2/s
Error 1.00e-01 7.51e-02 6.28e-02 1.79e-01 2.12e-01 2.65e-01 ph/cm2/s
Fluence Cutoff-PL 4.03e-07 7.19e-07 9.80e-07 2.49e-06 2.83e-06 4.38e-06 erg/cm2
Error 5.15e-08 7.64e-08 1.26e-07 1.15e-06 3.15e-07 1.32e-06 erg/cm2
Peak flux Cutoff-PL 1.06e-01 3.31e-01 3.61e-01 8.60e-02 8.71e-01 8.85e-01 ph/cm2/s
Error 1.25e-01 1.27e-01 9.95e-02 1.16e-01 2.46e-01 2.66e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.17e-01 3.35e-01 3.56e-01 9.03e-02 8.86e-01 8.94e-01 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 1.558 0.164 - - 9.00e-04 8.60e-05 58.480 57
CPL 1.556 0.608 9908.5 0.0 9.02e-04 6.16e-04 58.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.247 0.327 - - 8.46e-03 1.74e-03 75.520 57
CPL -1.790 3.722 73.6 27.9 1.59e-01 1.05e+01 69.370 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: 135.552000 sec.
T50 in the 50-300 keV band: 114.880000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 334.144 -159.612 174.532
T90 261.964 -128.844 133.120
T50 114.072 -9.112 104.960
Peak 1.000 1.272 2.272
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
119.2438 -66.9651 0.0186 30.0 -8.1 2.4518 10.3 TRIG_01036139
------------------------------------------
Foreground time interval of the image:
-116.323 28.077 (delta_t = 144.400 [sec])
Background time interval of the image:
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 -159.612 sec. to 174.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55806 ( -0.163624 0.164803 )
Norm@50keV : 9.00007E-04 ( -8.64014e-05 8.56961e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.48 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.21e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 334.1 sec: 0.114203 ( -0.0106074 0.0106234 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82754e-06 ( -2.94498e-07 2.9769e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -159.612 sec. to 174.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55590 ( -0.564467 0.65201 )
Epeak [keV] : 9908.47 ( -9897.84 -9897.84 )
Norm@50keV : 9.02440E-04 ( -0.000212874 0.00101845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.48 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.84e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 334.1 sec: 0.114174 ( -0.005416 0.010588 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8325e-06 ( -3.38757e-07 2.9058e-07 ) ergs/cm2
Band function
Time interval is from -159.612 sec. to 174.532 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93091 ( -4.93091 -4.93091 )
beta : -1.66870 ( -0.243853 0.191744 )
Epeak [keV] : 24.6876 ( -24.6876 4.74188 )
Norm@50keV : 97.9673 ( -8.88325 424448 )
------------------------------------------------------------
Photon flux (15-150 keV) in 334.1 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] : 13.3799 (-1.72194 2.02484)
R^2/D10^2 : 1.86264E-02 (-0.00738189 0.0120187)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 94.42 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.35e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.361e-07 3.987e-08
25- 50 8.384e-07 1.099e-07
50-150 9.646e-07 1.848e-07
15-150 2.039e-06 2.698e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.993 (-77.3964 -199.027)
Norm : 0.463699 (-0.0421861 0.047625)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.01e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.859e-07 1.277e-07
25- 50 7.421e-07 3.822e-07
50-150 1.627e-06 8.650e-07
15-150 2.755e-06 1.413e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.20619 (-1.41517 1.68534)
R1^2/D10^2 : 0.127706 (-0.0648982 0.146301)
kT2 [keV] : 32.6404 (-9.45873 26.829)
R2^2/D10^2 : 6.67963E-04 (-0.00053915 0.00153384)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.75e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.017e-07 1.365e-07
25- 50 7.554e-07 2.008e-07
50-150 1.727e-06 8.775e-07
15-150 2.884e-06 1.071e-06
Peak spectrum fit
Power-law model
Time interval is from 1.272 sec. to 2.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24720 ( -0.327267 0.326046 )
Norm@50keV : 8.45844E-03 ( -0.00174048 0.00174047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 75.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.08e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.999985 ( -0.211388 0.212323 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.47104e-08 ( -1.87562e-08 1.89662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.272 sec. to 2.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.79031 ( -6.22682 1.21784 )
Epeak [keV] : 73.6117 ( -12.3288 43.3977 )
Norm@50keV : 0.158564 ( -0.165441 20.9127 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.08e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.871481 ( -0.251949 0.239879 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75503e-08 ( -1.90866e-08 1.97485e-08 ) ergs/cm2
Band function
Time interval is from 1.272 sec. to 2.272 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.78270 ( -1.68888 -1.15713 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 73.6418 ( -12.2212 43.3906 )
Norm@50keV : 0.157977 ( -0.157822 2.24884 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.885513 ( ) 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] : 19.1683 (-3.24433 4.21935)
R^2/D10^2 : 5.76621E-02 (-0.0285892 0.0504129)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.31e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.151e-09 1.817e-09
25- 50 2.009e-08 7.431e-09
50-150 5.434e-08 2.100e-08
15-150 7.858e-08 2.428e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.186 -200)
Norm : 4.18447 (-0.870402 0.870402)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.10e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.042e-08 6.145e-09
25- 50 2.004e-08 1.173e-08
50-150 4.396e-08 2.534e-08
15-150 7.443e-08 4.350e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.65193 (-2.21635 13.8843)
R1^2/D10^2 : 1626.22 (-1853.91 -1853.91)
kT2 [keV] : 19.7992 (-3.47312 4.87195)
R2^2/D10^2 : 5.06358E-02 (-0.0508359 0.0346015)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.73 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.34e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.996e-09 3.062e-09
25- 50 1.884e-08 7.921e-09
50-150 5.534e-08 2.812e-08
15-150 8.117e-08 3.181e-08
Plot creation:
Mon Mar 8 20:50:38 EST 2021