batgrbproduct analysis for trigger=1015919
batgrbproduct Analysis for Trigger=1015919
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): Tue Jan 5 16:18:29 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1015919/GCN5_download_cron
======================================================================
Trigger: 01015919 Segment: 000
BAT Trigger Time: 631487437.12 [s; MET]
Trigger Stop: 631487438.144 [s; MET]
UTC: 2021-01-04T21:10:10.846440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 53.6011737701449 Dec: 37.9308387655033 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.88
Image Trigger?: NO
Rate S/N Ratio: 11.5325625946708 [ if not an image trigger ]
Image S/N Ratio: 7.88
Flight Position: [ source = BAT ]
RA: 53.6011737701449 Dec: 37.9308387655033 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 53.5611196407161 Dec: 37.9514057367965 [deg; J2000]
{ 03h 34m 14.7s , +37d 57' 05.1" }
+/- 1.66185302939093 [arcmin] (estimated 90% radius based on SNR)
+/- 0.592690020348197 [arcmin] (formal 1-sigma fit error)
SNR: 14.7226529758265
Angular difference between Flight and Ground position is 2.261632 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 19.944000005722 +/- 2.33209344161079
Measured from: 0.372000098228455
to: 20.3160001039505 [s; relative to TRIGTIME]
T50: 7.62399995326996 +/- 3.41421150460726
Measured from: 6.42800009250641
to: 14.0520000457764 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.8320000171661
to: 11.8320000171661 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.148000001907349
to: 22.7639999389648 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.745757 0.780210 0.504155 0.082614
0.047156 0.049072 0.043951 0.042008 [error]
Peak 0.069124 0.082680 0.061687 0.008715
0.010705 0.011577 0.009718 0.008867 [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 2.24e-07 3.36e-07 3.77e-07 8.01e-07 1.18e-06 1.74e-06 erg/cm2
Error 2.52e-08 2.36e-08 4.38e-08 1.93e-07 9.91e-08 2.33e-07 erg/cm2
Peak flux Power-law 7.21e-01 6.29e-01 3.77e-01 3.40e-01 1.87e+00 2.07e+00 ph/cm2/s
Error 1.53e-01 8.99e-02 7.97e-02 1.39e-01 2.67e-01 3.01e-01 ph/cm2/s
Fluence Cutoff-PL 2.23e-07 3.39e-07 3.77e-07 7.17e-07 1.17e-06 1.65e-06 erg/cm2
Error 2.76e-08 2.75e-08 4.43e-08 3.51e-07 1.11e-07 3.06e-07 erg/cm2
Peak flux Cutoff-PL 6.83e-01 6.70e-01 3.82e-01 1.77e-01 1.84e+00 1.91e+00 ph/cm2/s
Error 1.71e-01 1.19e-01 8.72e-02 1.96e-01 2.04e-01 3.55e-01 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 1.835 0.139 - - 5.59e-03 4.62e-04 56.190 57
CPL 1.775 0.515 169.4 -0.0 6.03e-03 3.87e-03 56.150 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.740 0.250 - - 1.39e-02 2.26e-03 34.780 57
CPL 1.239 1.008 67.3 -19.8 2.65e-02 5.69e-02 33.970 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: 14.080000 sec.
T50 in the 50-300 keV band: 10.176000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 22.912 -0.148 22.764
T90 19.944 0.372 20.316
T50 7.624 6.428 14.052
Peak 1.000 10.832 11.832
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
53.5611 +37.9514 0.0131 25.7 -109.0 0.9978 14.7 TRIG_01015919
------------------------------------------
Foreground time interval of the image:
-0.148 10.881 (delta_t = 11.029 [sec])
Background time interval of the image:
-239.120 -0.148 (delta_t = 238.972 [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 -0.148 sec. to 22.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83484 ( -0.13729 0.141113 )
Norm@50keV : 5.59491E-03 ( -0.000466113 0.000458653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.19 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.05e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 22.91 sec: 0.781628 ( -0.0556108 0.0556805 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17888e-06 ( -9.84259e-08 9.98044e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.148 sec. to 22.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77537 ( -0.531963 0.497998 )
Epeak [keV] : 169.450 ( -171.183 -171.195 )
Norm@50keV : 6.02741E-03 ( -0.00220815 0.00553556 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.69e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 22.91 sec: 0.778929 ( -0.059355 0.057457 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17184e-06 ( -1.1592e-07 1.05553e-07 ) ergs/cm2
Band function
Time interval is from -0.148 sec. to 22.764 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.77565 ( 1.64585 1.64585 )
beta : -9.35331 ( 9.36703 19.3618 )
Epeak [keV] : 171.819 ( -171.84 -171.84 )
Norm@50keV : 6.02413E-03 ( -0.000886234 0.00349666 )
------------------------------------------------------------
Photon flux (15-150 keV) in 22.91 sec: 0.778270 ( ) 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] : 11.3874 (-1.07763 1.20528)
R^2/D10^2 : 0.216928 (-0.0675443 0.097661)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 110.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.56e-05 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.355e-07 1.879e-08
25- 50 4.002e-07 3.505e-08
50-150 3.008e-07 5.521e-08
15-150 8.365e-07 7.411e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.0251 (-23.8924 38.8116)
Norm : 3.43428 (-0.347056 0.410626)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.42 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.23e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.056e-07 2.422e-08
25- 50 3.533e-07 2.898e-08
50-150 5.628e-07 1.890e-07
15-150 1.122e-06 2.149e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.53983 (-1.15232 1.30825)
R1^2/D10^2 : 2.28873 (-1.2358 3.57623)
kT2 [keV] : 21.3765 (-4.14186 6.83831)
R2^2/D10^2 : 1.67276E-02 (-0.0106569 0.0215523)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.30 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.90e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.217e-07 7.631e-08
25- 50 3.282e-07 8.206e-08
50-150 5.921e-07 1.979e-07
15-150 1.142e-06 3.202e-07
Peak spectrum fit
Power-law model
Time interval is from 10.832 sec. to 11.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73968 ( -0.24366 0.255477 )
Norm@50keV : 1.39028E-02 ( -0.00229206 0.00223711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 34.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.91e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.87279 ( -0.266875 0.26693 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28365e-07 ( -2.16279e-08 2.20981e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.832 sec. to 11.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23866 ( -1.13252 0.882483 )
Epeak [keV] : 67.2576 ( -27.6551 -67.2576 )
Norm@50keV : 2.65496E-02 ( -0.0265496 0.0872398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 33.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.91e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.84472 ( -0.13641 0.27184 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22571e-07 ( -2.35874e-08 2.4544e-08 ) ergs/cm2
Band function
Time interval is from 10.832 sec. to 11.832 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.68645 ( -4.68645 -4.68645 )
beta : -1.90796 ( -0.359225 0.300176 )
Epeak [keV] : 24.7480 ( -11.3246 5.50546 )
Norm@50keV : 1171.22 ( -165.335 1.10964e+07 )
------------------------------------------------------------
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] : 11.6907 (-2.04928 2.49202)
R^2/D10^2 : 0.505329 (-0.255983 0.519324)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.62e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.457e-08 4.466e-09
25- 50 4.445e-08 8.950e-09
50-150 3.588e-08 1.251e-08
15-150 9.490e-08 2.059e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 113.561 (-47.2353 -112.293)
Norm : 8.06383 (-1.23928 1.84662)
------------------------------------------------------------
#Fit statistic : Chi-Squared 33.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.93e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.104e-08 4.250e-09
25- 50 3.728e-08 1.019e-08
50-150 6.471e-08 3.969e-08
15-150 1.230e-07 4.411e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.87923 (-1.8578 2.43979)
R1^2/D10^2 : 4.11709 (-2.84472 13.0704)
kT2 [keV] : 20.8747 (-6.01729 15.3281)
R2^2/D10^2 : 4.52492E-02 (-0.0389849 0.126621)
------------------------------------------------------------
#Fit statistic : Chi-Squared 32.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.93e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.209e-08 1.231e-08
25- 50 3.663e-08 1.894e-08
50-150 6.356e-08 3.741e-08
15-150 1.223e-07 6.192e-08
Plot creation:
Tue Jan 5 16:23:08 EST 2021