batgrbproduct analysis for trigger=1180410
batgrbproduct Analysis for Trigger=1180410
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 v2.46
Process Start Time (local time): Tue Jul 25 10:45:08 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1180410/GCN5_download_cron
======================================================================
Trigger: 01180410 Segment: 000
BAT Trigger Time: 711805384.576 [s; MET]
Trigger Stop: 711805385.088 [s; MET]
UTC: 2023-07-23T11:42:32.881800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 250.378850607907 Dec: -5.3272728850738 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.27
Image Trigger?: NO
Rate S/N Ratio: 14.247806848775 [ if not an image trigger ]
Image S/N Ratio: 8.27
Flight Position: [ source = BAT ]
RA: 250.378850607907 Dec: -5.3272728850738 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 250.390680151011 Dec: -5.31892262464675 [deg; J2000]
{ 16h 41m 33.8s , -05d 19' 08.1" }
+/- 1.0048274523743 [arcmin] (estimated 90% radius based on SNR)
+/- 0.36686510932048 [arcmin] (formal 1-sigma fit error)
SNR: 30.208595555158
Angular difference between Flight and Ground position is 0.866290 arcmin
Partial Coding Fraction: 0.3984375 [ including projection effects ]
Duration
T90: 6.64399993419647 +/- 0.814560045364915
Measured from: 0.124000191688538
to: 6.76800012588501 [s; relative to TRIGTIME]
T50: 2.67999994754791 +/- 0.409838994945152
Measured from: 1.26800012588501
to: 3.94800007343292 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.6360000371933
to: 2.6360000371933 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.215999960899353
to: 7.93599998950958 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.746554 1.094046 0.707104 0.149929
0.050926 0.048651 0.039717 0.028597 [error]
Peak 0.141977 0.271431 0.153765 0.031045
0.019228 0.020043 0.016037 0.010899 [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 3.05e-07 4.76e-07 5.60e-07 1.27e-06 1.71e-06 2.61e-06 erg/cm2
Error 2.47e-08 2.47e-08 3.83e-08 1.77e-07 9.31e-08 2.12e-07 erg/cm2
Peak flux Power-law 2.43e+00 1.68e+00 7.61e-01 4.80e-01 5.11e+00 5.35e+00 ph/cm2/s
Error 3.13e-01 1.66e-01 9.94e-02 1.07e-01 5.17e-01 5.32e-01 ph/cm2/s
Fluence Cutoff-PL 2.75e-07 5.14e-07 5.85e-07 5.31e-07 1.65e-06 1.90e-06 erg/cm2
Error 2.92e-08 3.20e-08 4.32e-08 2.39e-07 9.91e-08 2.51e-07 erg/cm2
Peak flux Cutoff-PL 1.57e+00 2.26e+00 1.12e+00 1.36e-01 5.07e+00 5.09e+00 ph/cm2/s
Error 3.59e-01 2.36e-01 1.62e-01 7.30e-02 5.18e-01 5.23e-01 ph/cm2/s
Fluence Band 2.70e-07 5.16e-07 5.75e-07 7.68e-07 1.65e-06 2.13e-06 erg/cm2
Error 2.99e-08 3.51e-08 -------- -------- 9.82e-08 -------- erg/cm2
Peak flux Band 1.63e+00 2.23e+00 1.12e+00 1.50e-01 5.11e+00 5.13e+00 ph/cm2/s
Error 2.51e-01 2.18e-01 1.30e-01 -------- 4.83e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.768 0.084 - - 2.28e-02 1.21e-03 52.210 57
CPL 1.090 0.382 65.9 15.8 5.10e-02 2.39e-02 41.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.142 0.132 - - 3.18e-02 3.46e-03 101.780 57
CPL -0.443 0.831 49.6 4.8 6.34e-01 8.07e-01 53.240 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: 5.184000 sec.
T50 in the 50-300 keV band: 2.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.152 -0.216 7.936
T90 6.644 0.124 6.768
T50 2.680 1.268 3.948
Peak 1.000 1.636 2.636
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.3907 -5.3189 0.0064 44.7 -21.4 2.8244 30.2 TRIG_01180410
------------------------------------------
Foreground time interval of the image:
-0.216 7.936 (delta_t = 8.152 [sec])
Background time interval of the image:
-239.576 -105.856 (delta_t = 133.720 [sec])
-103.576 -76.116 (delta_t = 27.460 [sec])
-74.576 -14.526 (delta_t = 60.050 [sec])
-13.576 -0.216 (delta_t = 13.360 [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 -0.216 sec. to 7.936 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76780 ( -0.0838321 0.0849179 )
Norm@50keV : 2.27890E-02 ( -0.0012091 0.00120402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.21 using 59 PHA bins.
# Reduced chi-squared = 0.9160 for 57 degrees of freedom
# Null hypothesis probability = 6.549537e-01
Photon flux (15-150 keV) in 8.152 sec: 3.10195 ( -0.163345 0.163554 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7126e-06 ( -9.29727e-08 9.3201e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.216 sec. to 7.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09007 ( -0.398119 0.365809 )
Epeak [keV] : 65.9312 ( -9.43965 22.2017 )
Norm@50keV : 5.09910E-02 ( -0.0176481 0.030124 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.57 using 59 PHA bins.
# Reduced chi-squared = 0.7424 for 56 degrees of freedom
# Null hypothesis probability = 9.246818e-01
Photon flux (15-150 keV) in 8.152 sec: 3.02483 ( -0.16859 0.16867 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65313e-06 ( -9.90713e-08 9.91528e-08 ) ergs/cm2
Band function
Time interval is from -0.216 sec. to 7.936 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.985101 ( -0.422966 1.0208 )
beta : -2.37373 ( 2.36397 0.435136 )
Epeak [keV] : 61.5897 ( -21.267 21.6353 )
Norm@50keV : 5.87183E-02 ( -0.0239516 0.221481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7432 for 55 degrees of freedom
# Null hypothesis probability = 9.219142e-01
Photon flux (15-150 keV) in 8.152 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6531e-06 ( -1.65304e-06 -9.81175e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.2123 (-0.754024 0.800428)
R^2/D10^2 : 0.537816 (-0.106585 0.132198)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.42 using 59 PHA bins.
# Reduced chi-squared = 1.9899 for 57 degrees of freedom
# Null hypothesis probability = 1.299470e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.623e-07 1.549e-08
25- 50 5.686e-07 3.481e-08
50-150 6.335e-07 6.603e-08
15-150 1.364e-06 7.948e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 116.551 (-20.878 24.7435)
Norm : 13.2527 (-0.867542 1.04683)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.817e-07 2.360e-08
25- 50 5.014e-07 3.163e-08
50-150 8.819e-07 2.338e-07
15-150 1.665e-06 2.507e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.69476 (-1.41978 1.61333)
R1^2/D10^2 : 3.85239 (-1.85977 4.88719)
kT2 [keV] : 20.9002 (-3.18775 5.74487)
R2^2/D10^2 : 7.18817E-02 (-0.0459358 0.0749588)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.638e-07 5.825e-08
25- 50 5.185e-07 7.663e-08
50-150 8.462e-07 2.055e-07
15-150 1.629e-06 2.433e-07
Peak spectrum fit
Power-law model
Time interval is from 1.636 sec. to 2.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14223 ( -0.12807 0.136896 )
Norm@50keV : 3.17743E-02 ( -0.00348112 0.00344778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.78 using 59 PHA bins.
# Reduced chi-squared = 1.7856 for 57 degrees of freedom
# Null hypothesis probability = 2.465418e-04
Photon flux (15-150 keV) in 1 sec: 5.10546 ( -0.516438 0.516951 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.96561e-07 ( -3.06741e-08 3.07234e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.636 sec. to 2.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.443448 ( -0.923271 0.739355 )
Epeak [keV] : 49.5545 ( -4.60241 4.90689 )
Norm@50keV : 0.633876 ( -0.361406 1.25314 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9507 for 56 degrees of freedom
# Null hypothesis probability = 5.799600e-01
Photon flux (15-150 keV) in 1 sec: 5.07295 ( -0.5176 0.519 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21414e-07 ( -3.3004e-08 3.2995e-08 ) ergs/cm2
Band function
Time interval is from 1.636 sec. to 2.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.444381 ( -0.691997 1.03068 )
beta : -10.0000 ( 10 2.13163e-14 )
Epeak [keV] : 49.5405 ( -4.59407 4.87243 )
Norm@50keV : 0.634815 ( -0.362146 1.24821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9680 for 55 degrees of freedom
# Null hypothesis probability = 5.420547e-01
Photon flux (15-150 keV) in 1 sec: 5.11385 ( 1.88615 -0.48528 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21621e-07 ( -3.21614e-07 -3.2376e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.5572 (-1.04777 1.12766)
R^2/D10^2 : 1.20900 (-0.341045 0.471152)
(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 4.042e-08 6.430e-09
25- 50 1.340e-07 1.490e-08
50-150 1.308e-07 2.440e-08
15-150 3.053e-07 3.305e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.0123 (-10.99 13.6659)
Norm : 27.6081 (-3.46422 3.79545)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.035e-08 8.700e-09
25- 50 1.101e-07 1.056e-08
50-150 1.353e-07 2.220e-08
15-150 3.158e-07 3.025e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.20540 (-1.29491 1.45758)
R1^2/D10^2 : 2.84963E+05 (-272080 -272314)
kT2 [keV] : 12.9962 (-1.12425 1.24562)
R2^2/D10^2 : 1.03758 (-0.315472 0.433277)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.852e-08 9.955e-09
25- 50 1.269e-07 1.670e-08
50-150 1.376e-07 2.640e-08
15-150 3.131e-07 3.760e-08
Plot creation:
Tue Jul 25 10:51:31 EDT 2023