batgrbproduct analysis for trigger=1081073
batgrbproduct Analysis for Trigger=1081073
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): Mon Oct 25 20:30:51 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1081073/GCN5_download_cron
======================================================================
Trigger: 01081073 Segment: 000
BAT Trigger Time: 656806864 [s; MET]
Trigger Stop: 656806928 [s; MET]
UTC: 2021-10-24T22:20:36.039280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 154.688128375659 Dec: 24.5786815823873 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 19.41
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.41
Flight Position: [ source = BAT ]
RA: 154.688128375659 Dec: 24.5786815823873 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 154.707995042889 Dec: 24.5659453414337 [deg; J2000]
{ 10h 18m 49.9s , +24d 33' 57.4" }
+/- 0.912510497644677 [arcmin] (estimated 90% radius based on SNR)
+/- 0.316185847689324 [arcmin] (formal 1-sigma fit error)
SNR: 34.6674121577841
Angular difference between Flight and Ground position is 1.326320 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 603.475999951363 +/- 20.6549776493225
Measured from: -19.3879998922348
to: 584.088000059128 [s; relative to TRIGTIME]
T50: 486.384000062943 +/- 44.7276329237161
Measured from: 17.7360000610352
to: 504.120000123978 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.17200005054474
to: 6.17200005054474 [s; relative to TRIGTIME]
Total Fluence
Measured from: -56.3719999790192
to: 613.083999991417 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.936911 4.375431 3.106241 0.691274
0.162538 0.168744 0.148767 0.131976 [error]
Peak 0.033800 0.037096 0.036835 0.022134
0.006676 0.007133 0.006211 0.005531 [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 1.05e-06 1.79e-06 2.32e-06 6.08e-06 6.83e-06 1.12e-05 erg/cm2
Error 8.46e-08 8.35e-08 1.48e-07 8.53e-07 3.45e-07 9.59e-07 erg/cm2
Peak flux Power-law 2.34e-01 2.80e-01 2.42e-01 3.56e-01 8.81e-01 1.11e+00 ph/cm2/s
Error 7.88e-02 5.64e-02 4.93e-02 1.61e-01 1.55e-01 2.04e-01 ph/cm2/s
Fluence Cutoff-PL 1.05e-06 1.79e-06 2.32e-06 5.60e-06 6.83e-06 1.08e-05 erg/cm2
Error 8.41e-08 6.63e-08 1.49e-07 1.52e-06 3.62e-07 1.56e-06 erg/cm2
Peak flux Cutoff-PL 2.39e-01 2.82e-01 2.40e-01 3.44e-01 8.83e-01 1.10e+00 ph/cm2/s
Error 7.32e-02 5.65e-02 4.95e-02 1.94e-01 1.55e-01 2.19e-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 1.625 0.087 - - 1.10e-03 5.14e-05 48.510 57
CPL 1.626 0.087 9999.4 0.0 1.10e-03 3.24e-04 48.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.212 0.318 - - 7.50e-03 1.28e-03 49.590 57
CPL 1.218 0.324 9999.4 0.0 7.53e-03 4.88e-03 49.600 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: 585.664000 sec.
T50 in the 50-300 keV band: 370.304000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 669.456 -56.372 613.084
T90 603.476 -19.388 584.088
T50 486.384 17.736 504.120
Peak 1.000 5.172 6.172
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
154.7080 +24.5659 0.0055 2.7 166.1 4.5306 34.7 TRIG_01081073
------------------------------------------
Foreground time interval of the image:
-16.599 71.001 (delta_t = 87.600 [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
-56.372000 451.830000
453.000000 514.330000
516.000000 596.480000
598.000000 613.084000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62545 ( -0.0863279 0.0870519 )
Norm@50keV : 1.10175E-03 ( -5.15229e-05 5.12952e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.51 using 59 PHA bins.
# Reduced chi-squared = 0.8511 for 57 degrees of freedom
# Null hypothesis probability = 7.808039e-01
Photon flux (15-150 keV) in 665.1 sec: 0.142720 ( -0.00660489 0.00662315 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.83277e-06 ( -3.43625e-07 3.45717e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-56.372000 451.830000
453.000000 514.330000
516.000000 596.480000
598.000000 613.084000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62622 ( -0.0884395 0.0858355 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.10317E-03 ( -0.000197005 0.000450452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.52 using 59 PHA bins.
# Reduced chi-squared = 0.8664 for 56 degrees of freedom
# Null hypothesis probability = 7.509267e-01
Photon flux (15-150 keV) in 665.1 sec: 0.142666 ( -0.006794 0.006602 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.82911e-06 ( -3.78043e-07 3.46185e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-56.372000 451.830000
453.000000 514.330000
516.000000 596.480000
598.000000 613.084000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28657 ( 1.28598 6.20764 )
beta : -1.62666 ( 1.62677 0.0874478 )
Epeak [keV] : 41.6968 ( -42.2572 -42.2572 )
Norm@50keV : 2.11882E-03 ( -0.00105983 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.51 using 59 PHA bins.
# Reduced chi-squared = 0.8820 for 55 degrees of freedom
# Null hypothesis probability = 7.192627e-01
Photon flux (15-150 keV) in 665.1 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] : 14.0134 ( )
R^2/D10^2 : 1.91517E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 177.71 using 59 PHA bins.
# Reduced chi-squared = 3.1177 for 57 degrees of freedom
# Null hypothesis probability = 2.504293e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.283e-07 4.599e-08
25- 50 1.967e-06 1.074e-07
50-150 2.545e-06 2.431e-07
15-150 5.040e-06 2.714e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 174.721 (-39.0196 -174.191)
Norm : 0.575668 (-0.028688 0.0317487)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.688e-07 6.751e-08
25- 50 1.834e-06 1.909e-07
50-150 3.841e-06 1.250e-06
15-150 6.643e-06 1.439e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.26471 (-1.08508 1.26018)
R1^2/D10^2 : 0.234715 (-0.109958 0.249678)
kT2 [keV] : 24.9544 (-3.81278 6.12555)
R2^2/D10^2 : 2.02173E-03 (-0.00108068 0.00169876)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.010e-06 1.613e-07
25- 50 1.770e-06 2.155e-07
50-150 3.915e-06 6.538e-07
15-150 6.695e-06 7.632e-07
Peak spectrum fit
Power-law model
Time interval is from 5.172 sec. to 6.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21246 ( -0.324826 0.31161 )
Norm@50keV : 7.49518E-03 ( -0.00128187 0.00128081 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.59 using 59 PHA bins.
# Reduced chi-squared = 0.8699 for 57 degrees of freedom
# Null hypothesis probability = 7.466027e-01
Photon flux (15-150 keV) in 1 sec: 0.881353 ( -0.154371 0.154752 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.57763e-08 ( -1.46056e-08 1.4802e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.172 sec. to 6.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21760 ( -0.343364 0.305132 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 7.52737E-03 ( -0.00128545 0.00847767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.60 using 59 PHA bins.
# Reduced chi-squared = 0.8857 for 56 degrees of freedom
# Null hypothesis probability = 7.142305e-01
Photon flux (15-150 keV) in 1 sec: 0.883417 ( -0.156516 0.152543 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.57356e-08 ( -1.45555e-08 1.44738e-08 ) ergs/cm2
Band function
Time interval is from 5.172 sec. to 6.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91448 ( -4.91448 -4.91448 )
beta : -1.27843 ( -0.40877 0.357089 )
Epeak [keV] : 24.8648 ( -24.8648 9.79277 )
Norm@50keV : 558.467 ( -95.3146 2.87846e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.44 using 59 PHA bins.
# Reduced chi-squared = 0.8989 for 55 degrees of freedom
# Null hypothesis probability = 6.860841e-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] : 19.6307 (-4.97641 7.32757)
R^2/D10^2 : 4.12065E-02 (-0.0259882 0.0669963)
(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 3.083e-09 1.379e-09
25- 50 1.517e-08 5.014e-09
50-150 4.322e-08 1.517e-08
15-150 6.147e-08 1.891e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-63.8665 -200)
Norm : 3.61920 (-0.631918 0.631918)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.016e-09 5.215e-09
25- 50 1.734e-08 9.960e-09
50-150 3.804e-08 2.150e-08
15-150 6.439e-08 3.654e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.05682 (-2.29878 3.6482)
R1^2/D10^2 : 0.936034 (-0.694802 1.90351)
kT2 [keV] : 43.7009 (-18.6885 -43.7025)
R2^2/D10^2 : 3.19212E-03 (-0.00303794 0.0131906)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.288e-09 4.770e-09
25- 50 1.566e-08 8.595e-09
50-150 5.649e-08 3.133e-08
15-150 8.043e-08 4.283e-08
Plot creation:
Mon Oct 25 20:37:44 EDT 2021