batgrbproduct analysis for trigger=1064361
batgrbproduct Analysis for Trigger=1064361
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): Sun Aug 8 21:07:53 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1064361/GCN5_download_cron
======================================================================
Trigger: 01064361 Segment: 000
BAT Trigger Time: 650051464 [s; MET]
Trigger Stop: 650051528 [s; MET]
UTC: 2021-08-07T17:50:36.492180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.7174134247296 Dec: 22.2101923319245 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.88
Flight Position: [ source = BAT ]
RA: 83.7174134247296 Dec: 22.2101923319245 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.7204892861395 Dec: 22.2071173691326 [deg; J2000]
{ 05h 34m 52.9s , +22d 12' 25.6" }
+/- 1.1551431641094 [arcmin] (estimated 90% radius based on SNR)
+/- 0.342523659935632 [arcmin] (formal 1-sigma fit error)
SNR: 24.753615914512
Angular difference between Flight and Ground position is 0.251461 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 227.427999854088 +/- 20.5140658362016
Measured from: -153.05999982357
to: 74.3680000305176 [s; relative to TRIGTIME]
T50: 130.919999957085 +/- 14.7163059516146
Measured from: -116.539999842644
to: 14.3800001144409 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -141.136000037193
to: -140.136000037193 [s; relative to TRIGTIME]
Total Fluence
Measured from: -163.600000023842
to: 104.996000051498 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.689362 3.843266 1.900645 0.328558
0.122378 0.124766 0.107917 0.092942 [error]
Peak 0.026114 0.022612 0.023855 0.014827
0.007400 0.007655 0.006632 0.005457 [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 1.28e-06 1.66e-06 1.57e-06 2.62e-06 5.39e-06 7.13e-06 erg/cm2
Error 9.08e-08 7.02e-08 1.09e-07 3.83e-07 2.47e-07 4.78e-07 erg/cm2
Peak flux Power-law 2.45e-01 2.34e-01 1.56e-01 1.62e-01 7.00e-01 7.97e-01 ph/cm2/s
Error 1.11e-01 6.54e-02 5.42e-02 1.18e-01 1.88e-01 2.09e-01 ph/cm2/s
Fluence Cutoff-PL 1.26e-06 1.68e-06 1.57e-06 2.16e-06 5.33e-06 6.67e-06 erg/cm2
Error 1.08e-07 8.48e-08 1.12e-07 8.66e-07 2.96e-07 7.96e-07 erg/cm2
Peak flux Cutoff-PL 2.53e-01 2.36e-01 1.53e-01 1.52e-01 7.04e-01 7.97e-01 ph/cm2/s
Error 1.11e-01 5.07e-02 5.51e-02 1.52e-01 1.88e-01 2.13e-01 ph/cm2/s
Fluence Band 1.20e-06 1.71e-06 1.53e-06 2.31e-06 5.27e-06 6.77e-06 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 2.080 0.087 - - 2.21e-03 1.09e-04 55.700 57
CPL 1.972 0.271 11.6 -0.4 2.52e-03 8.35e-04 55.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.586 0.491 - - 5.47e-03 1.50e-03 51.660 57
CPL 2.108 0.910 42.6 0.0 2.92e-03 0.00e+00 51.560 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 268.596 -163.600 104.996
T90 227.428 -153.060 74.368
T50 130.920 -116.540 14.380
Peak 1.000 -141.136 -140.136
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.7205 +22.2071 0.0078 36.4 -16.1 5.9921 24.8 TRIG_01064361
------------------------------------------
Foreground time interval of the image:
-81.799 70.701 (delta_t = 152.500 [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
-163.600000 98.720000
104.000000 104.996000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08027 ( -0.0862395 0.0879234 )
Norm@50keV : 2.20624E-03 ( -0.000109344 0.000108307 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9771 for 57 degrees of freedom
# Null hypothesis probability = 5.241268e-01
Photon flux (15-150 keV) in 263.3 sec: 0.343757 ( -0.0155153 0.0155993 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.38738e-06 ( -2.46018e-07 2.47221e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-163.600000 98.720000
104.000000 104.996000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97246 ( -0.361668 0.179979 )
Epeak [keV] : 11.5958 ( -10.7023 -11.5958 )
Norm@50keV : 2.52035E-03 ( -0.000287229 0.00138255 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.37 using 59 PHA bins.
# Reduced chi-squared = 0.9887 for 56 degrees of freedom
# Null hypothesis probability = 4.988495e-01
Photon flux (15-150 keV) in 263.3 sec: 0.340964 ( -0.017361 0.017255 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.32922e-06 ( -3.02505e-07 2.90446e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-163.600000 98.720000
104.000000 104.996000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46285 ( 1.47626 1.47626 )
beta : -2.18618 ( 2.18813 0.155225 )
Epeak [keV] : 31.0114 ( -31.3668 9.69819 )
Norm@50keV : 5.26151E-03 ( -0.00197548 22.0335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.80 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 55 degrees of freedom
# Null hypothesis probability = 5.204529e-01
Photon flux (15-150 keV) in 263.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.26771e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3444 ( )
R^2/D10^2 : 0.129656 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 180.38 using 59 PHA bins.
# Reduced chi-squared = 3.1646 for 57 degrees of freedom
# Null hypothesis probability = 9.863772e-15
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.519e-07 5.911e-08
25- 50 1.960e-06 8.965e-08
50-150 1.127e-06 1.307e-07
15-150 3.839e-06 2.027e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.4030 (-8.39596 10.3629)
Norm : 1.67732 (-0.132008 0.146259)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.124e-06 6.740e-08
25- 50 1.755e-06 7.649e-08
50-150 2.140e-06 2.109e-07
15-150 5.019e-06 2.462e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.75924 (-0.766699 0.757908)
R1^2/D10^2 : 0.539994 (-0.171957 0.300871)
kT2 [keV] : 25.2712 (-4.60088 7.16578)
R2^2/D10^2 : 2.81654E-03 (-0.00165138 0.0033316)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.087e-06 1.132e-07
25- 50 1.751e-06 2.116e-07
50-150 2.393e-06 7.116e-07
15-150 5.231e-06 8.518e-07
Peak spectrum fit
Power-law model
Time interval is from -141.136 sec. to -140.136 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58573 ( -0.479585 0.502332 )
Norm@50keV : 5.47485E-03 ( -0.00152821 0.00147441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.66 using 59 PHA bins.
# Reduced chi-squared = 0.9062 for 57 degrees of freedom
# Null hypothesis probability = 6.751287e-01
Photon flux (15-150 keV) in 1 sec: 0.700470 ( -0.187578 0.188027 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.12925e-08 ( -1.50066e-08 1.51623e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -141.136 sec. to -140.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10787 ( -1.78392 0.0365436 )
Epeak [keV] : 42.6260 ( )
Norm@50keV : 2.91556E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.56 using 59 PHA bins.
# Reduced chi-squared = 0.9207 for 56 degrees of freedom
# Null hypothesis probability = 6.433954e-01
Photon flux (15-150 keV) in 1 sec: 0.703855 ( -0.191802 0.184985 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.12848e-08 ( -1.50003e-08 1.49549e-08 ) ergs/cm2
Band function
Time interval is from -141.136 sec. to -140.136 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27433 ( 1.27557 1.27557 )
beta : -1.58542 ( 1.5857 0.479492 )
Epeak [keV] : 29.4037 ( -28.7682 -28.7682 )
Norm@50keV : 1.14698E-02 ( -0.0114968 221.005 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.66 using 59 PHA bins.
# Reduced chi-squared = 0.9392 for 55 degrees of freedom
# Null hypothesis probability = 6.031986e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.3100 (-5.27695 8.10445)
R^2/D10^2 : 5.69001E-02 (-0.0428062 0.164086)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.116e-09 1.909e-09
25- 50 1.333e-08 7.974e-09
50-150 2.496e-08 1.457e-08
15-150 4.140e-08 2.262e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-199.362 -199.362)
Norm : 2.83360 (-0.742535 0.967492)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.056e-09 4.336e-09
25- 50 1.357e-08 8.295e-09
50-150 2.977e-08 1.822e-08
15-150 5.040e-08 3.005e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.38073 (-1.92634 3.54014)
R1^2/D10^2 : 5.67904 (-5.24699 105.406)
kT2 [keV] : 25.3063 (-9.60691 46.9682)
R2^2/D10^2 : 1.07185E-02 (-0.0101352 0.0467722)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.074e-09 5.715e-09
25- 50 1.043e-08 5.485e-09
50-150 3.213e-08 1.908e-08
15-150 5.163e-08 2.920e-08
Plot creation:
Sun Aug 8 21:13:13 EDT 2021