batgrbproduct analysis for trigger=1073893
batgrbproduct Analysis for Trigger=1073893
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 Sep 20 07:22:36 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1073893/GCN5_download_cron
======================================================================
Trigger: 01073893 Segment: 000
BAT Trigger Time: 653704141.312 [s; MET]
Trigger Stop: 653704141.568 [s; MET]
UTC: 2021-09-19T00:28:33.559600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 80.229910067484 Dec: 1.27427647843543 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.91
Image Trigger?: NO
Rate S/N Ratio: 24.2899156029822 [ if not an image trigger ]
Image S/N Ratio: 8.91
Flight Position: [ source = BAT ]
RA: 80.229910067484 Dec: 1.27427647843543 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 80.2422705986849 Dec: 1.28577304488463 [deg; J2000]
{ 05h 20m 58.1s , +01d 17' 08.8" }
+/- 2.01603427986805 [arcmin] (estimated 90% radius based on SNR)
+/- 1.11943482996015 [arcmin] (formal 1-sigma fit error)
SNR: 11.1717539538775
Angular difference between Flight and Ground position is 1.012699 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 0.163999915122986 +/- 0.0312410238573899
Measured from: 0.064000129699707
to: 0.228000044822693 [s; relative to TRIGTIME]
T50: 0.0759999752044678 +/- 0.0256125023115591
Measured from: 0.108000040054321
to: 0.184000015258789 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.354000091552734
to: 0.645999908447266 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0519999265670776
to: 0.235999941825867 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.041516 0.050044 0.046443 0.020362
0.006643 0.007823 0.008004 0.006797 [error]
Peak 0.041638 0.059501 0.055102 0.024253
0.012417 0.013556 0.013225 0.012566 [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-08 2.24e-08 3.01e-08 8.26e-08 8.75e-08 1.48e-07 erg/cm2
Error 3.17e-09 3.68e-09 6.88e-09 3.84e-08 1.66e-08 4.48e-08 erg/cm2
Peak flux Power-law 4.23e-01 4.77e-01 3.84e-01 5.15e-01 1.47e+00 1.80e+00 ph/cm2/s
Error 1.82e-01 1.24e-01 1.08e-01 3.12e-01 3.46e-01 4.32e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-08 2.36e-08 3.19e-08 4.92e-08 8.71e-08 1.17e-07 erg/cm2
Error 3.76e-09 4.45e-09 8.14e-09 5.08e-08 1.70e-08 5.57e-08 erg/cm2
Peak flux Cutoff-PL 4.28e-01 4.78e-01 3.83e-01 5.06e-01 1.47e+00 1.80e+00 ph/cm2/s
Error 3.08e-01 1.34e-01 1.19e-01 -------- 3.47e-01 5.16e-01 ph/cm2/s
Fluence Band 1.14e-08 2.37e-08 3.24e-08 4.49e-08 8.71e-08 1.13e-07 erg/cm2
Error -------- -------- -------- 5.21e-08 1.69e-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 1.578 0.273 - - 5.07e-02 8.85e-03 40.470 57
CPL 1.139 0.881 106.6 -28.9 8.28e-02 1.39e-01 39.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.311 0.422 - - 1.23e-02 2.83e-03 49.650 57
CPL 2.711 2.049 220.0 0.0 1.84e-03 0.00e+00 48.860 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: 0.192000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.184 0.052 0.236
T90 0.164 0.064 0.228
T50 0.076 0.108 0.184
Peak 1.000 -0.354 0.646
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
80.2423 +1.2858 0.0172 42.6 -12.3 0.1602 11.2 TRIG_01073893
------------------------------------------
Foreground time interval of the image:
0.052 0.236 (delta_t = 0.184 [sec])
Background time interval of the image:
-239.312 -208.952 (delta_t = 30.360 [sec])
-206.312 -105.522 (delta_t = 100.790 [sec])
-104.312 -61.222 (delta_t = 43.090 [sec])
-60.312 0.052 (delta_t = 60.364 [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 0.052 sec. to 0.236 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57815 ( -0.261138 0.284514 )
Norm@50keV : 5.06865E-02 ( -0.00895015 0.00875575 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.47 using 59 PHA bins.
# Reduced chi-squared = 0.7099 for 57 degrees of freedom
# Null hypothesis probability = 9.521396e-01
Photon flux (15-150 keV) in 0.184 sec: 6.47013 ( -1.05354 1.05388 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.74618e-08 ( -1.65222e-08 1.66716e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.052 sec. to 0.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13933 ( -1.10334 0.658776 )
Epeak [keV] : 106.575 ( -48.7082 -106.578 )
Norm@50keV : 8.28027E-02 ( -0.0828014 0.19589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.79 using 59 PHA bins.
# Reduced chi-squared = 0.7105 for 56 degrees of freedom
# Null hypothesis probability = 9.501284e-01
Photon flux (15-150 keV) in 0.184 sec: 6.41560 ( -1.06173 1.0602 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.71188e-08 ( -1.70189e-08 1.69996e-08 ) ergs/cm2
Band function
Time interval is from 0.052 sec. to 0.236 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13940 ( -0.702795 0.943473 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 106.524 ( -48.6676 -106.531 )
Norm@50keV : 8.28012E-02 ( -0.0397807 0.195812 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.79 using 59 PHA bins.
# Reduced chi-squared = 0.7235 for 55 degrees of freedom
# Null hypothesis probability = 9.388764e-01
Photon flux (15-150 keV) in 0.184 sec: 6.37911 ( 0.62089 -1.03109 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.70933e-08 ( -8.7092e-08 -1.68408e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0620 (-3.20058 4.0504)
R^2/D10^2 : 0.739754 (-0.409335 0.922343)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.8768 for 57 degrees of freedom
# Null hypothesis probability = 7.336177e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.461e-09 2.218e-09
25- 50 2.577e-08 6.296e-09
50-150 3.986e-08 1.447e-08
15-150 7.209e-08 1.918e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.280 (-103.038 -199.292)
Norm : 26.5518 (-4.28665 4.29919)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.217e-08 7.072e-09
25- 50 2.340e-08 1.324e-08
50-150 5.132e-08 2.926e-08
15-150 8.689e-08 4.940e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.35426 (-2.27015 5.30465)
R1^2/D10^2 : 39.7521 (-37.0421 185.2)
kT2 [keV] : 21.5668 (-5.86436 14.4079)
R2^2/D10^2 : 0.189290 (-0.16284 0.41505)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.291e-08 7.216e-09
25- 50 2.033e-08 9.151e-09
50-150 5.498e-08 2.889e-08
15-150 8.822e-08 3.716e-08
Peak spectrum fit
Power-law model
Time interval is from -0.354 sec. to 0.646 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31095 ( -0.42096 0.422371 )
Norm@50keV : 1.23208E-02 ( -0.00283644 0.00282778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.8710 for 57 degrees of freedom
# Null hypothesis probability = 7.445404e-01
Photon flux (15-150 keV) in 1 sec: 1.47292 ( -0.344908 0.346365 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21431e-07 ( -3.11481e-08 3.16781e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.354 sec. to 0.646 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.71067 ( -3.05717 1.03985 )
Epeak [keV] : 219.981 ( )
Norm@50keV : 1.83716E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.86 using 59 PHA bins.
# Reduced chi-squared = 0.8726 for 56 degrees of freedom
# Null hypothesis probability = 7.393985e-01
Photon flux (15-150 keV) in 1 sec: 1.47405 ( -0.35147 0.34188 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21368e-07 ( -3.31953e-08 3.1676e-08 ) ergs/cm2
Band function
Time interval is from -0.354 sec. to 0.646 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06092 ( 1.06088 1.06088 )
beta : -1.31095 ( 1.31095 0.42135 )
Epeak [keV] : 40.4089 ( -40.4301 -40.4301 )
Norm@50keV : 2.32300E-02 ( -0.013702 2.03569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.9027 for 55 degrees of freedom
# Null hypothesis probability = 6.785573e-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] : 17.2352 (-4.40813 6.73457)
R^2/D10^2 : 0.107990 (-0.0721788 0.185476)
(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 6.508e-09 3.030e-09
25- 50 2.911e-08 1.301e-08
50-150 6.201e-08 3.232e-08
15-150 9.763e-08 4.338e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-97.4517 -199.363)
Norm : 6.07735 (-1.4044 1.40444)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.513e-08 8.970e-09
25- 50 2.911e-08 1.708e-08
50-150 6.385e-08 3.764e-08
15-150 1.081e-07 6.345e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.83385 (-1.7048 14.7123)
R1^2/D10^2 : 1587.82 (-1246.86 -1247.79)
kT2 [keV] : 19.2178 (-5.23492 9.6495)
R2^2/D10^2 : 7.19321E-02 (-0.0628116 0.0829283)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Mon Sep 20 07:29:35 EDT 2021