batgrbproduct analysis for trigger=1061284
batgrbproduct Analysis for Trigger=1061284
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): Sat Jul 24 20:48:18 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061284/GCN5_download_cron
======================================================================
Trigger: 01061284 Segment: 000
BAT Trigger Time: 648744398.336 [s; MET]
Trigger Stop: 648744399.36 [s; MET]
UTC: 2021-07-23T14:46:10.915460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 121.726128854254 Dec: -32.889330847315 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.56
Image Trigger?: NO
Rate S/N Ratio: 36.3455636907725 [ if not an image trigger ]
Image S/N Ratio: 14.56
Flight Position: [ source = BAT ]
RA: 121.726128854254 Dec: -32.889330847315 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 121.722554944994 Dec: -32.893270315874 [deg; J2000]
{ 08h 06m 53.4s , -32d 53' 35.8" }
+/- 0.680507185281944 [arcmin] (estimated 90% radius based on SNR)
+/- 0.187911490559417 [arcmin] (formal 1-sigma fit error)
SNR: 52.7143416412649
Angular difference between Flight and Ground position is 0.297140 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 48.5439999103546 +/- 3.50051419328445
Measured from: -1.98799979686737
to: 46.5560001134872 [s; relative to TRIGTIME]
T50: 16.2560000419617 +/- 0.939829727902855
Measured from: 3.58400011062622
to: 19.8400001525879 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.68400001525879
to: 3.68400001525879 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.58799993991852
to: 66.6360000371933 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.497102 3.319481 2.621483 0.477456
0.070496 0.074619 0.066330 0.054483 [error]
Peak 0.073046 0.132005 0.132970 0.023941
0.009612 0.010924 0.010606 0.007448 [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 8.32e-07 1.44e-06 1.90e-06 5.10e-06 5.55e-06 9.27e-06 erg/cm2
Error 5.24e-08 5.06e-08 6.83e-08 4.39e-07 1.66e-07 4.65e-07 erg/cm2
Peak flux Power-law 8.66e-01 9.92e-01 8.15e-01 1.12e+00 3.08e+00 3.79e+00 ph/cm2/s
Error 1.77e-01 1.18e-01 8.20e-02 2.58e-01 3.13e-01 3.46e-01 ph/cm2/s
Fluence Cutoff-PL 6.66e-07 1.46e-06 2.01e-06 2.37e-06 5.26e-06 6.50e-06 erg/cm2
Error 7.27e-08 5.33e-08 8.09e-08 6.29e-07 1.98e-07 6.67e-07 erg/cm2
Peak flux Cutoff-PL 6.80e-01 9.90e-01 8.76e-01 6.47e-01 2.90e+00 3.19e+00 ph/cm2/s
Error 2.42e-01 1.24e-01 1.07e-01 3.98e-01 3.53e-01 6.05e-01 ph/cm2/s
Fluence Band 6.59e-07 1.45e-06 2.00e-06 2.58e-06 5.26e-06 6.72e-06 erg/cm2
Error -------- 5.16e-08 7.76e-08 -------- -------- -------- 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 1.600 0.059 - - 8.33e-03 2.42e-04 75.550 53
CPL 0.849 0.295 88.2 15.3 1.74e-02 5.08e-03 54.480 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.283 0.176 - - 2.59e-02 2.38e-03 51.890 53
CPL 0.553 0.855 120.0 -42.0 5.15e-02 4.85e-02 49.540 52
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: 24.448000 sec.
T50 in the 50-300 keV band: 10.560000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 71.224 -4.588 66.636
T90 48.544 -1.988 46.556
T50 16.256 3.584 19.840
Peak 1.000 2.684 3.684
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
121.7226 -32.8933 0.0036 31.3 -15.3 5.3068 52.7 TRIG_01061284
------------------------------------------
Foreground time interval of the image:
-4.588 13.265 (delta_t = 17.853 [sec])
Background time interval of the image:
-239.336 -237.776 (delta_t = 1.560 [sec])
-236.336 -46.147 (delta_t = 190.189 [sec])
-45.336 -4.588 (delta_t = 40.748 [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 -4.588 sec. to 66.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59975 ( -0.0590898 0.0595015 )
Norm@50keV : 8.33188E-03 ( -0.00024201 0.00024201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.55 using 55 PHA bins.
# Reduced chi-squared = 1.426 for 53 degrees of freedom
# Null hypothesis probability = 2.261419e-02
Photon flux (15-150 keV) in 71.22 sec: 1.07060 ( -0.036761 0.0370915 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.54968e-06 ( -1.65651e-07 1.65851e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.588 sec. to 66.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.848819 ( -0.301791 0.287298 )
Epeak [keV] : 88.1618 ( -10.4119 20.2142 )
Norm@50keV : 1.74322E-02 ( -0.00422546 0.00594338 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 55 PHA bins.
# Reduced chi-squared = 1.048 for 52 degrees of freedom
# Null hypothesis probability = 3.802549e-01
Photon flux (15-150 keV) in 71.22 sec: 0.990652 ( -0.043876 0.045048 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.26208e-06 ( -1.98205e-07 1.97856e-07 ) ergs/cm2
Band function
Time interval is from -4.588 sec. to 66.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.848831 ( -0.12878 0.281865 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 88.1465 ( -7.41965 20.2174 )
Norm@50keV : 1.74314E-02 ( -0.00423173 0.00594684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 55 PHA bins.
# Reduced chi-squared = 1.068 for 51 degrees of freedom
# Null hypothesis probability = 3.434953e-01
Photon flux (15-150 keV) in 71.22 sec: 0.991394 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25852e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.6003 ( )
R^2/D10^2 : 7.94592E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 172.32 using 55 PHA bins.
# Reduced chi-squared = 3.2512 for 53 degrees of freedom
# Null hypothesis probability = 1.533130e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.196e-07 1.951e-08
25- 50 1.387e-06 5.484e-08
50-150 2.708e-06 1.378e-07
15-150 4.415e-06 1.432e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 191.844 (-27.9551 -191.746)
Norm : 4.30387 (-0.131873 0.143365)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.619e-07 3.205e-08
25- 50 1.465e-06 5.377e-08
50-150 3.206e-06 5.584e-07
15-150 5.433e-06 5.644e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.89539 (-0.75475 0.870193)
R1^2/D10^2 : 1.77798 (-0.717678 1.33042)
kT2 [keV] : 21.4949 (-1.43263 1.79716)
R2^2/D10^2 : 2.73900E-02 (-0.00750567 0.00858807)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.385e-07 1.014e-07
25- 50 1.426e-06 8.618e-08
50-150 3.078e-06 1.927e-07
15-150 5.242e-06 3.226e-07
Peak spectrum fit
Power-law model
Time interval is from 2.684 sec. to 3.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28319 ( -0.175522 0.177221 )
Norm@50keV : 2.58967E-02 ( -0.00237874 0.0023733 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.89 using 55 PHA bins.
# Reduced chi-squared = 0.9790 for 53 degrees of freedom
# Null hypothesis probability = 5.174841e-01
Photon flux (15-150 keV) in 1 sec: 3.08016 ( -0.310145 0.31518 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56972e-07 ( -2.43717e-08 2.44819e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.684 sec. to 3.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.552954 ( -0.927567 0.782135 )
Epeak [keV] : 120.023 ( -36.047 -120.023 )
Norm@50keV : 5.15068E-02 ( -0.0263396 0.0705851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.54 using 55 PHA bins.
# Reduced chi-squared = 0.9526 for 52 degrees of freedom
# Null hypothesis probability = 5.713596e-01
Photon flux (15-150 keV) in 1 sec: 2.90126 ( -0.34347 0.36241 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47538e-07 ( -2.7509e-08 2.6996e-08 ) ergs/cm2
Band function
Time interval is from 2.684 sec. to 3.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.75056 ( -5.10955 -4.75056 )
beta : -1.46570 ( -0.24394 0.223391 )
Epeak [keV] : 40.2280 ( -6.40869 15.5173 )
Norm@50keV : 90.4374 ( -8.14596 1114.81 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.64 using 55 PHA bins.
# Reduced chi-squared = 0.9537 for 51 degrees of freedom
# Null hypothesis probability = 5.679184e-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] : 18.8142 (-1.93912 2.22127)
R^2/D10^2 : 0.170639 (-0.0526477 0.0739481)
(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 1.191e-08 2.025e-09
25- 50 5.691e-08 6.990e-09
50-150 1.478e-07 2.255e-08
15-150 2.166e-07 2.495e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-18.5685 -200)
Norm : 11.8274 (-1.06381 1.06381)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.946e-08 8.115e-09
25- 50 5.666e-08 1.942e-08
50-150 1.243e-07 5.586e-08
15-150 2.104e-07 8.459e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.49409 (-3.19058 4.9065)
R1^2/D10^2 : 0.812345 (-0.490961 0.935475)
kT2 [keV] : 29.5696 (-7.71823 67.3502)
R2^2/D10^2 : 2.88201E-02 (-0.0268083 0.0581082)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.860e-08 1.006e-08
25- 50 5.810e-08 3.086e-08
50-150 1.666e-07 9.210e-08
15-150 2.433e-07 1.193e-07
Plot creation:
Sat Jul 24 20:54:00 EDT 2021