batgrbproduct analysis for trigger=1071993
batgrbproduct Analysis for Trigger=1071993
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 Sep 5 22:24:35 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1071993/GCN5_download_cron
======================================================================
Trigger: 01071993 Segment: 000
BAT Trigger Time: 652493588.992 [s; MET]
Trigger Stop: 652493591.04 [s; MET]
UTC: 2021-09-05T00:12:41.320740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 309.061771074576 Dec: -44.4308232449456 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.35
Image Trigger?: NO
Rate S/N Ratio: 14.1774468787578 [ if not an image trigger ]
Image S/N Ratio: 9.35
Flight Position: [ source = BAT ]
RA: 309.061771074576 Dec: -44.4308232449456 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 309.054484088303 Dec: -44.4240341283562 [deg; J2000]
{ 20h 36m 13.1s , -44d 25' 26.5" }
+/- 1.38702822389321 [arcmin] (estimated 90% radius based on SNR)
+/- 0.471337834228057 [arcmin] (formal 1-sigma fit error)
SNR: 19.0607235386967
Angular difference between Flight and Ground position is 0.513247 arcmin
Partial Coding Fraction: 0.3398438 [ including projection effects ]
Duration
T90: 778.079999923706 +/- 388.352032957867
Measured from: -23.8479998111725
to: 754.232000112534 [s; relative to TRIGTIME]
T50: 778.079999923706 +/- 772.355341720927
Measured from: -23.8479998111725
to: 754.232000112534 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.860000014305115
to: 1.86000001430511 [s; relative to TRIGTIME]
Total Fluence
Measured from: -23.8479999303818
to: 754.231999993324 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.005637 2.426051 1.979097 0.617059
0.253150 0.261663 0.233188 0.213997 [error]
Peak 0.051232 0.073701 0.095821 0.038033
0.013265 0.014566 0.012762 0.010113 [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 6.04e-07 1.09e-06 1.50e-06 4.33e-06 4.33e-06 7.53e-06 erg/cm2
Error 1.12e-07 1.26e-07 2.30e-07 1.40e-06 5.57e-07 1.59e-06 erg/cm2
Peak flux Power-law 3.94e-01 5.43e-01 5.53e-01 1.02e+00 1.82e+00 2.51e+00 ph/cm2/s
Error 1.53e-01 1.29e-01 9.59e-02 3.95e-01 3.35e-01 4.46e-01 ph/cm2/s
Fluence Cutoff-PL 5.66e-07 1.15e-06 1.53e-06 2.06e-06 4.15e-06 5.32e-06 erg/cm2
Error 1.27e-07 1.61e-07 2.50e-07 2.71e-06 6.23e-07 2.16e-06 erg/cm2
Peak flux Cutoff-PL 3.95e-01 5.44e-01 5.53e-01 1.02e+00 1.82e+00 2.51e+00 ph/cm2/s
Error 1.74e-01 1.31e-01 -------- 4.31e-01 3.35e-01 5.86e-01 ph/cm2/s
Fluence Band 5.84e-07 1.16e-06 1.46e-06 3.65e-06 4.24e-06 6.87e-06 erg/cm2
Error -------- 1.55e-07 -------- -------- 5.66e-07 -------- 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 1.532 0.194 - - 5.95e-04 6.98e-05 58.150 57
CPL 1.054 0.749 94.2 -29.3 1.06e-03 1.25e-03 56.960 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.974 0.311 - - 1.58e-02 2.85e-03 49.080 57
CPL 0.969 0.343 9999.4 0.0 1.59e-02 1.68e-02 49.080 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: 279.744000 sec.
T50 in the 50-300 keV band: 166.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 778.080 -23.848 754.232
T90 778.080 -23.848 754.232
T50 778.080 -23.848 754.232
Peak 1.000 0.860 1.860
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
309.0545 -44.4240 0.0101 33.0 54.5 3.7424 19.1 TRIG_01071993
------------------------------------------
Foreground time interval of the image:
-23.848 25.209 (delta_t = 49.057 [sec])
Background time interval of the image:
-239.992 -216.982 (delta_t = 23.010 [sec])
-215.992 -55.112 (delta_t = 160.880 [sec])
-53.992 -23.848 (delta_t = 30.144 [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
Multiple GTIs in the spectrum
tstart tstop
-23.848000 193.138000
197.008000 370.138000
373.008000 754.232000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53221 ( -0.193125 0.195139 )
Norm@50keV : 5.95033E-04 ( -7.0119e-05 6.95483e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.327548e-01
Photon flux (15-150 keV) in 771.3 sec: 7.49437E-02 ( -0.00854783 0.00855787 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.33186e-06 ( -5.53487e-07 5.60717e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-23.848000 193.138000
197.008000 370.138000
373.008000 754.232000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05418 ( -0.880961 0.61716 )
Epeak [keV] : 94.1636 ( -35.5802 -94.1636 )
Norm@50keV : 1.06417E-03 ( -0.000520338 0.00197956 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.393104e-01
Photon flux (15-150 keV) in 771.3 sec: 7.35299E-02 ( -0.0088502 0.0088341 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.1541e-06 ( -6.19655e-07 6.25902e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-23.848000 193.138000
197.008000 370.138000
373.008000 754.232000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95241 ( -13.464 -4.95241 )
beta : -1.67053 ( -0.247411 0.229469 )
Epeak [keV] : 25.3833 ( -6.63878 4.77866 )
Norm@50keV : 56.3309 ( -6.27394 346.242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9944 for 55 degrees of freedom
# Null hypothesis probability = 4.863923e-01
Photon flux (15-150 keV) in 771.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24262e-06 ( -4.23722e-06 -5.57681e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0390 (-1.90474 2.2556)
R^2/D10^2 : 1.06792E-02 (-0.00438957 0.00727806)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.52 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 57 degrees of freedom
# Null hypothesis probability = 8.062332e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.428e-07 7.952e-08
25- 50 1.279e-06 2.071e-07
50-150 1.662e-06 3.868e-07
15-150 3.283e-06 4.828e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.961 (-85.4368 -199.009)
Norm : 0.306435 (-0.0342604 0.0383822)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.887e-07 3.275e-07
25- 50 1.132e-06 6.213e-07
50-150 2.481e-06 1.355e-06
15-150 4.202e-06 2.296e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.60010 (-2.1513 3.15513)
R1^2/D10^2 : 9.41031E-02 (-0.065704 0.290487)
kT2 [keV] : 23.5520 (-6.34326 21.894)
R2^2/D10^2 : 1.33994E-03 (-0.00119622 0.00311267)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.786e-07 3.035e-07
25- 50 1.144e-06 6.101e-07
50-150 2.414e-06 1.362e-06
15-150 4.137e-06 2.142e-06
Peak spectrum fit
Power-law model
Time interval is from 0.860 sec. to 1.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.973742 ( -0.322789 0.298967 )
Norm@50keV : 1.58097E-02 ( -0.00288413 0.00281517 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8610 for 57 degrees of freedom
# Null hypothesis probability = 7.630291e-01
Photon flux (15-150 keV) in 1 sec: 1.81816 ( -0.333914 0.336418 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72576e-07 ( -3.0058e-08 3.01595e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.860 sec. to 1.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.969346 ( -0.386582 0.299994 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.58870E-02 ( -0.00270438 0.0308501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8764 for 56 degrees of freedom
# Null hypothesis probability = 7.321209e-01
Photon flux (15-150 keV) in 1 sec: 1.81833 ( -0.33447 0.3356 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72632e-07 ( -3.0261e-08 3.0112e-08 ) ergs/cm2
Band function
Time interval is from 0.860 sec. to 1.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.80049 ( -4.80049 -4.80049 )
beta : -1.04340 ( -0.354296 0.350531 )
Epeak [keV] : 28.5861 ( -28.5861 12.1754 )
Norm@50keV : 357.954 ( -59.9128 3.6686e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8815 for 55 degrees of freedom
# Null hypothesis probability = 7.202114e-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] : 26.1831 (-5.79682 8.48257)
R^2/D10^2 : 3.77632E-02 (-0.0214615 0.0449285)
(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 4.386e-09 1.778e-09
25- 50 2.546e-08 9.555e-09
50-150 1.284e-07 4.234e-08
15-150 1.582e-07 4.551e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-43.2657 -200)
Norm : 7.74398 (-1.38153 1.38153)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.928e-08 1.102e-08
25- 50 3.709e-08 2.104e-08
50-150 8.135e-08 4.665e-08
15-150 1.377e-07 7.845e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61905 (-2.65553 6.5925)
R1^2/D10^2 : 1.73913 (-1.51635 11.0536)
kT2 [keV] : 35.4160 (-10.184 44.1933)
R2^2/D10^2 : 1.38918E-02 (-0.0123153 0.0175242)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.395e-08 8.265e-09
25- 50 3.017e-08 1.663e-08
50-150 1.329e-07 7.470e-08
15-150 1.770e-07 9.320e-08
Plot creation:
Sun Sep 5 22:31:40 EDT 2021