batgrbproduct analysis for trigger=1010946
batgrbproduct Analysis for Trigger=1010946
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): Thu Dec 3 21:51:08 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1010946/batgroup_hand_proc
======================================================================
Trigger: 01010946 Segment: 000
BAT Trigger Time: 628671173.248 [s; MET]
Trigger Stop: 628671185.408 [s; MET]
UTC: 2020-12-03T06:52:27.160660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 38.0799197655575 Dec: -26.5375146309371 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.4
Image Trigger?: NO
Rate S/N Ratio: 14 [ if not an image trigger ]
Image S/N Ratio: 8.4
Flight Position: [ source = BAT ]
RA: 38.0799197655575 Dec: -26.5375146309371 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 38.0547758527732 Dec: -26.5053405517262 [deg; J2000]
{ 02h 32m 13.1s , -26d 30' 19.2" }
+/- 1.92927508619372 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1346427448692 [arcmin] (formal 1-sigma fit error)
SNR: 11.8963146579422
Angular difference between Flight and Ground position is 2.355586 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 12.1840000152588 +/- 2.09745091306972
Measured from: -0.856000065803528
to: 11.3279999494553 [s; relative to TRIGTIME]
T50: 8.09599995613098 +/- 2.11640938663064
Measured from: 1.62000000476837
to: 9.71599996089935 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.4879999160767
to: 12.4879999160767 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.73199999332428
to: 12.8400000333786 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.146797 0.235692 0.111147 0.040718
0.025001 0.026124 0.022502 0.019237 [error]
Peak 0.025249 0.023028 0.013552 -0.000109
0.006430 0.006584 0.005714 0.004643 [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 5.16e-08 8.00e-08 9.31e-08 2.09e-07 2.86e-07 4.33e-07 erg/cm2
Error 1.06e-08 1.13e-08 2.15e-08 9.72e-08 5.01e-08 1.19e-07 erg/cm2
Peak flux Power-law 2.22e-01 1.66e-01 8.29e-02 5.90e-02 4.99e-01 5.30e-01 ph/cm2/s
Error 8.73e-02 5.04e-02 4.43e-02 7.02e-02 1.47e-01 1.63e-01 ph/cm2/s
Fluence Cutoff-PL 4.90e-08 8.63e-08 9.15e-08 7.47e-08 2.68e-07 3.01e-07 erg/cm2
Error 1.19e-08 1.63e-08 2.49e-08 1.48e-07 5.84e-08 1.61e-07 erg/cm2
Peak flux Cutoff-PL 2.22e-01 1.68e-01 8.19e-02 4.51e-02 4.97e-01 5.16e-01 ph/cm2/s
Error 8.85e-02 8.34e-02 6.45e-02 5.08e-02 1.49e-01 1.83e-01 ph/cm2/s
Fluence Band 4.76e-08 8.84e-08 8.77e-08 1.41e-07 2.72e-07 3.65e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.16e-01 1.96e-01 6.43e-02 2.69e-02 4.91e-01 5.03e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.49e-01 1.63e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.781 0.259 - - 1.99e-03 3.37e-04 69.650 57
CPL 1.171 1.243 58.1 -18.2 4.44e-03 1.53e-02 68.780 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.004 0.596 - - 3.32e-03 1.36e-03 59.140 57
CPL 1.927 1.061 35.0 -0.3 3.71e-03 0.00e+00 59.140 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 15.572 -2.732 12.840
T90 12.184 -0.856 11.328
T50 8.096 1.620 9.716
Peak 1.000 11.488 12.488
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
38.0548 -26.5053 0.0161 16.7 -129.5 0.5770 11.9 TRIG_01010946
------------------------------------------
Foreground time interval of the image:
-2.732 12.840 (delta_t = 15.572 [sec])
Background time interval of the image:
-239.248 -2.732 (delta_t = 236.516 [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 -2.732 sec. to 12.840 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78051 ( -0.251486 0.266671 )
Norm@50keV : 1.99429E-03 ( -0.000342221 0.000332643 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.65 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.21e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.272761 ( -0.0385417 0.0385438 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8608e-07 ( -4.93585e-08 5.08166e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.732 sec. to 12.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17134 ( -1.44727 1.03909 )
Epeak [keV] : 58.0501 ( -21.6588 -58.0536 )
Norm@50keV : 4.44317E-03 ( -0.00444241 0.0261275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.17e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.266608 ( -0.040126 0.040101 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67633e-07 ( -5.64257e-08 6.03011e-08 ) ergs/cm2
Band function
Time interval is from -2.732 sec. to 12.840 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.585718 ( 0.880966 5.56987 )
beta : -2.11444 ( 2.14471 0.557447 )
Epeak [keV] : 42.8614 ( -43.2071 141.504 )
Norm@50keV : 1.09326E-02 ( -0.0112979 2574.99 )
------------------------------------------------------------
Photon flux (15-150 keV) in 15.57 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72347e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.8872 (-1.66911 2.03765)
R^2/D10^2 : 9.54475E-02 (-0.0450295 0.0812429)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.71e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.673e-08 8.805e-09
25- 50 1.025e-07 2.000e-08
50-150 6.807e-08 2.543e-08
15-150 2.073e-07 4.567e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.2692 (-38.9212 -97.2692)
Norm : 1.21864 (-0.217659 0.285689)
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.80 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.36e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.959e-08 1.017e-08
25- 50 8.526e-08 1.641e-08
50-150 1.360e-07 7.378e-08
15-150 2.708e-07 9.921e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.61213 (-6.19507 3.15819)
R1^2/D10^2 : 0.264113 (-0.169492 549.565)
kT2 [keV] : 25.5515 (-14.623 -25.7885)
R2^2/D10^2 : 2.48375E-03 (-0.00238592 0.0792277)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.41e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.576e-08 2.632e-08
25- 50 9.124e-08 4.856e-08
50-150 1.347e-07 7.917e-08
15-150 2.717e-07 1.422e-07
Peak spectrum fit
Power-law model
Time interval is from 11.488 sec. to 12.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00439 ( -0.546461 0.644865 )
Norm@50keV : 3.31904E-03 ( -0.00139377 0.00132339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.97e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.498864 ( -0.147389 0.147461 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.06149e-08 ( -1.13216e-08 1.23621e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.488 sec. to 12.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92734 ( -1.92787 0.193653 )
Epeak [keV] : 34.9723 ( -34.4795 -34.9981 )
Norm@50keV : 3.71368E-03 ( -0.00370917 -0.00370917 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.62e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.497346 ( -0.148923 0.148146 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02019e-08 ( -1.6428e-08 1.26198e-08 ) ergs/cm2
Band function
Time interval is from 11.488 sec. to 12.488 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.98953 ( 1.98953 1.05374 )
beta : -2.08476 ( 7.63736 17.6357 )
Epeak [keV] : 984.850 ( 1.69273 -32.9715 )
Norm@50keV : 3.34491E-03 ( -0.00102242 0.202853 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.491076 ( 6.50892 -0.148231 ) 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] : 7.55928 (-2.00602 2.96086)
R^2/D10^2 : 0.697145 (-0.697118 1.68553)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.98 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.68e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.884e-09 4.134e-09
25- 50 1.089e-08 6.950e-09
50-150 2.365e-09 1.944e-09
15-150 2.014e-08 1.260e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.2543 (-33.5402 -56.2543)
Norm : 2.69603 (-1.07382 2.29286)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.93e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.700e-09 4.014e-09
25- 50 9.992e-09 6.055e-09
50-150 1.076e-08 8.550e-09
15-150 2.746e-08 1.840e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.51911 (-1.36068 2.66283)
R1^2/D10^2 : 1.12012 (-0.559989 3.77798)
kT2 [keV] : 44.4006 (-33.8784 -44.403)
R2^2/D10^2 : 8.55178E-04 (-0.00084927 0.102903)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.05e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.261e-09 4.258e-09
25- 50 9.804e-09 5.790e-09
50-150 1.635e-08 9.180e-09
15-150 3.341e-08 1.618e-08
Plot creation:
Thu Dec 3 21:53:53 EST 2020