batgrbproduct analysis for trigger=1059494
batgrbproduct Analysis for Trigger=1059494
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): Fri Jul 9 15:24:41 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1059494/GCN5_download_cron
======================================================================
Trigger: 01059494 Segment: 000
BAT Trigger Time: 647443432 [s; MET]
Trigger Stop: 647443496 [s; MET]
UTC: 2021-07-08T13:23:24.666240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 142.579045529825 Dec: 14.4712178294586 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.51
Flight Position: [ source = BAT ]
RA: 142.579045529825 Dec: 14.4712178294586 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 142.593802920625 Dec: 14.5229538938038 [deg; J2000]
{ 09h 30m 22.5s , +14d 31' 22.6" }
+/- 2.50056034464392 [arcmin] (estimated 90% radius based on SNR)
+/- 1.10546229995544 [arcmin] (formal 1-sigma fit error)
SNR: 8.21284467116698
Angular difference between Flight and Ground position is 3.220359 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 298.431999921799 +/- 47.3189010708561
Measured from: -74.6479998826981
to: 223.784000039101 [s; relative to TRIGTIME]
T50: 115.007999897003 +/- 39.3778950267522
Measured from: -12.2479999065399
to: 102.759999990463 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.83599996566772
to: 3.83599996566772 [s; relative to TRIGTIME]
Total Fluence
Measured from: -99.8639999628067
to: 263.72000002861 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.337306 1.157020 1.120498 0.436199
0.147194 0.155000 0.144746 0.150750 [error]
Peak 0.017554 0.011381 0.021867 0.028796
0.008374 0.008887 0.008174 0.008031 [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 3.37e-07 5.75e-07 7.46e-07 1.96e-06 2.19e-06 3.61e-06 erg/cm2
Error 7.10e-08 7.07e-08 1.55e-07 8.92e-07 3.51e-07 1.02e-06 erg/cm2
Peak flux Power-law 5.50e-022.46e-05 9.62e-023.26e-04 1.28e-013.96e-03 3.51e-011.21e+00 3.74e-011.86e-02 6.27e-014.05e-01 ph/cm2/s
Error 8.87e-02 9.13e-02 6.57e-02 1.21e+00 2.91e-01 1.18e+00 ph/cm2/s
Fluence Cutoff-PL 3.41e-07 5.75e-07 7.37e-07 1.88e-06 2.18e-06 3.53e-06 erg/cm2
Error 6.75e-08 7.05e-08 1.51e-07 7.18e-07 3.49e-07 1.23e-06 erg/cm2
Peak flux Cutoff-PL 6.80e-02 1.07e-01 1.27e-01 2.88e-01 3.85e-01 5.88e-01 ph/cm2/s
Error 8.70e-02 9.16e-02 6.63e-02 -------- 2.92e-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 1.623 0.264 - - 6.68e-04 9.58e-05 85.550 57
CPL 1.624 0.279 10000.0 -0.0 6.69e-04 -2.85e-04 85.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.596 0.899 - - 2.64e-05 1.27e-05 47.440 57
CPL -3.088 0.450 10000.0 0.0 6.68e-05 0.00e+00 46.470 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: 106.944000 sec.
T50 in the 50-300 keV band: 59.968000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 363.584 -99.864 263.720
T90 298.432 -74.648 223.784
T50 115.008 -12.248 102.760
Peak 1.000 2.836 3.836
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
142.5938 +14.5230 0.0234 19.9 -72.8 3.6430 8.2 TRIG_01059494
------------------------------------------
Foreground time interval of the image:
-75.899 -10.430 (delta_t = 65.469 [sec])
-10.000 36.780 (delta_t = 46.780 [sec])
39.000 117.490 (delta_t = 78.490 [sec])
119.000 126.840 (delta_t = 7.840 [sec])
131.000 141.922 (delta_t = 10.922 [sec])
145.000 263.720 (delta_t = 118.720 [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
Multiple GTIs in the spectrum
tstart tstop
-99.864000 -10.430000
-10.000000 36.780000
39.000000 117.490000
119.000000 126.840000
131.000000 141.921600
145.000000 263.720000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62347 ( -0.259192 0.269483 )
Norm@50keV : 6.67652E-04 ( -9.7866e-05 9.37554e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 85.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.54e-03 with 57 degrees of freedom
Photon flux (15-150 keV) in 352.2 sec: 8.64317E-02 ( -0.0106083 0.0106113 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19308e-06 ( -3.45823e-07 3.55542e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-99.864000 -10.430000
-10.000000 36.780000
39.000000 117.490000
119.000000 126.840000
131.000000 141.921600
145.000000 263.720000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62357 ( -0.312347 0.246177 )
Epeak [keV] : 1.00000E+04 ( -9999.99 -10000 )
Norm@50keV : 6.68753E-04 ( -9.85404e-05 -0.000668759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 85.57 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.67e-03 with 56 degrees of freedom
Photon flux (15-150 keV) in 352.2 sec: 8.63968E-02 ( -0.010578 0.0105806 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17754e-06 ( -3.2551e-07 3.71571e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-99.864000 -10.430000
-10.000000 36.780000
39.000000 117.490000
119.000000 126.840000
131.000000 141.921600
145.000000 263.720000
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28847 ( 1.28931 1.28931 )
beta : -1.62340 ( -0.269734 0.259161 )
Epeak [keV] : 25.6516 ( -25.2215 -25.2215 )
Norm@50keV : 1.50209E-03 ( -0.000925856 1.4298 )
------------------------------------------------------------
Photon flux (15-150 keV) in 352.2 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] : 11.5985 ( )
R^2/D10^2 : 2.15565E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 124.60 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.99e-07 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.152e-07 5.869e-08
25- 50 6.504e-07 1.386e-07
50-150 5.139e-07 1.691e-07
15-150 1.380e-06 2.513e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-98.3838 -199.363)
Norm : 0.346336 (-0.0427982 0.0428068)
------------------------------------------------------------
#Fit statistic : Chi-Squared 89.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.28e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.037e-07 1.678e-07
25- 50 5.843e-07 3.216e-07
50-150 1.281e-06 7.030e-07
15-150 2.169e-06 1.188e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.16735 (-1.26018 1.47651)
R1^2/D10^2 : 0.375287 (-0.241029 0.780291)
kT2 [keV] : 35.5762 (-10.4352 24.1932)
R2^2/D10^2 : 4.90914E-04 (-0.000356854 0.00088177)
------------------------------------------------------------
#Fit statistic : Chi-Squared 78.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.06e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.967e-07 2.072e-07
25- 50 4.605e-07 1.745e-07
50-150 1.665e-06 9.206e-07
15-150 2.522e-06 1.063e-06
Peak spectrum fit
Power-law model
Time interval is from 2.836 sec. to 3.836 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.59584 ( 2.59584 4.39473 )
Norm@50keV : 2.63724E-05 ( -1.26528e-05 1.26528e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.13e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.373880 1.86031E-02 ( -0.37388 0.208043 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44026e-16 ( -4.12164e-08 2.17977e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.836 sec. to 3.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.08834 ( 3.08834 3.98741 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 6.68197E-05 ( -6.68188e-05 -6.68188e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.47 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.14e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.385161 2.34561E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72241e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 2.836 sec. to 3.836 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -0.585272 ( -1.25729 0.579998 )
Epeak [keV] : 16.9685 ( -16.9685 -16.9685 )
Norm@50keV : 0.434687 ( -0.433856 0.253471 )
------------------------------------------------------------
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] : 199.438 (-199.438 -199.438)
R^2/D10^2 : 1.49572E-04 (-0.000149572 0.0184181)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.67 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.76e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.721e-10 1.971e-10
25- 50 2.128e-09 1.490e-09
50-150 3.650e-08 2.441e-08
15-150 3.890e-08 2.616e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.55753 (-0.825806 0.825828)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.48e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.878e-09 2.645e-09
25- 50 7.461e-09 5.060e-09
50-150 1.636e-08 1.155e-08
15-150 2.770e-08 1.965e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.29316 (-2.88716 10.7487)
R1^2/D10^2 : 0.689812 (-0.822757 6.87509)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 1.37178E-04 (-7.55766e-05 0.000692877)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.36e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.144e-09 2.698e-09
25- 50 5.649e-09 3.673e-09
50-150 3.702e-08 2.775e-08
15-150 4.682e-08 3.365e-08
Plot creation:
Fri Jul 9 15:30:13 EDT 2021