batgrbproduct analysis for trigger=1162001
batgrbproduct Analysis for Trigger=1162001
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): Wed Mar 29 15:24:17 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1162001/GCN5_download_cron
======================================================================
Trigger: 01162001 Segment: 000
BAT Trigger Time: 701708119.552 [s; MET]
Trigger Stop: 701708120.576 [s; MET]
UTC: 2023-03-28T14:54:48.547320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.985760498204 Dec: 80.0162708424252 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.77
Image Trigger?: NO
Rate S/N Ratio: 53.7866154354408 [ if not an image trigger ]
Image S/N Ratio: 17.77
Flight Position: [ source = BAT ]
RA: 290.985760498204 Dec: 80.0162708424252 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 291.036803724337 Dec: 80.0125804631595 [deg; J2000]
{ 19h 24m 08.8s , +80d 00' 45.3" }
+/- 0.827827818059234 [arcmin] (estimated 90% radius based on SNR)
+/- 0.26544493947753 [arcmin] (formal 1-sigma fit error)
SNR: 39.8425318302376
Angular difference between Flight and Ground position is 0.575367 arcmin
Partial Coding Fraction: 0.46875 [ including projection effects ]
Duration
T90: 19.2319999933243 +/- 3.8156897210748
Measured from: -2.78399991989136
to: 16.4480000734329 [s; relative to TRIGTIME]
T50: 6.36800003051758 +/- 0.501134746042828
Measured from: 0.880000114440918
to: 7.2480001449585 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.259999990463257
to: 1.25999999046326 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.37600004673004
to: 25.4879999160767 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.930999 2.627081 1.979252 0.464879
0.078423 0.083092 0.072370 0.057218 [error]
Peak 0.205533 0.354406 0.338527 0.104842
0.017739 0.021214 0.020385 0.013657 [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 6.91e-07 1.17e-06 1.51e-06 3.94e-06 4.46e-06 7.32e-06 erg/cm2
Error 4.74e-08 4.76e-08 7.34e-08 4.19e-07 1.77e-07 4.68e-07 erg/cm2
Peak flux Power-law 2.29e+00 2.68e+00 2.25e+00 3.19e+00 8.36e+00 1.04e+01 ph/cm2/s
Error 2.70e-01 1.94e-01 1.60e-01 4.73e-01 5.38e-01 6.68e-01 ph/cm2/s
Fluence Cutoff-PL 6.35e-07 1.21e-06 1.56e-06 2.30e-06 4.34e-06 5.71e-06 erg/cm2
Error 5.97e-08 5.49e-08 8.17e-08 8.34e-07 1.96e-07 8.46e-07 erg/cm2
Peak flux Cutoff-PL 2.12e+00 2.74e+00 2.34e+00 2.28e+00 8.26e+00 9.49e+00 ph/cm2/s
Error 3.38e-01 2.16e-01 2.00e-01 -------- 5.52e-01 1.11e+00 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 1.631 0.068 - - 1.46e-02 5.50e-04 35.850 57
CPL 1.222 0.291 99.7 59.7 2.29e-02 7.39e-03 29.530 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.252 0.105 - - 7.07e-02 4.38e-03 61.860 57
CPL 0.914 0.414 178.9 -53.1 1.01e-01 4.72e-02 59.960 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: 14.592000 sec.
T50 in the 50-300 keV band: 5.056000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 32.864 -7.376 25.488
T90 19.232 -2.784 16.448
T50 6.368 0.880 7.248
Peak 1.000 0.260 1.260
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
291.0368 +80.0126 0.0048 37.4 -147.3 6.8115 39.8 TRIG_01162001
------------------------------------------
Foreground time interval of the image:
-7.376 15.949 (delta_t = 23.325 [sec])
Background time interval of the image:
-239.552 -7.376 (delta_t = 232.176 [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 -7.376 sec. to 25.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63080 ( -0.067946 0.0682946 )
Norm@50keV : 1.45686E-02 ( -0.00055079 0.00055021 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.85 using 59 PHA bins.
# Reduced chi-squared = 0.6289 for 57 degrees of freedom
# Null hypothesis probability = 9.872523e-01
Photon flux (15-150 keV) in 32.86 sec: 1.89044 ( -0.0761743 0.0763923 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.46124e-06 ( -1.76925e-07 1.77345e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.376 sec. to 25.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22170 ( -0.300145 0.281141 )
Epeak [keV] : 99.7017 ( -21.9534 97.3603 )
Norm@50keV : 2.29053E-02 ( -0.00599432 0.00878537 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.53 using 59 PHA bins.
# Reduced chi-squared = 0.5273 for 56 degrees of freedom
# Null hypothesis probability = 9.986266e-01
Photon flux (15-150 keV) in 32.86 sec: 1.84087 ( -0.08245 0.08297 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.34347e-06 ( -1.96766e-07 1.95747e-07 ) ergs/cm2
Band function
Time interval is from -7.376 sec. to 25.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12595 ( -0.363635 0.665888 )
beta : -1.93376 ( 1.93452 0.247483 )
Epeak [keV] : 85.7794 ( -35.0739 100.015 )
Norm@50keV : 2.59644E-02 ( -0.00872795 0.0407423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.33 using 59 PHA bins.
# Reduced chi-squared = 0.5333 for 55 degrees of freedom
# Null hypothesis probability = 9.982377e-01
Photon flux (15-150 keV) in 32.86 sec: 1.83522 ( 5.16478 -0.08447 ) 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] : 14.9518 ( )
R^2/D10^2 : 0.206669 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.18 using 59 PHA bins.
# Reduced chi-squared = 2.8278 for 57 degrees of freedom
# Null hypothesis probability = 6.937637e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.180e-07 2.509e-08
25- 50 1.260e-06 6.013e-08
50-150 1.914e-06 1.359e-07
15-150 3.492e-06 1.544e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 170.109 (-29.3174 -170.014)
Norm : 7.67910 (-0.336402 0.363647)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.403e-07 3.960e-08
25- 50 1.208e-06 1.022e-07
50-150 2.505e-06 7.032e-07
15-150 4.353e-06 7.842e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.16689 (-1.28898 1.37989)
R1^2/D10^2 : 1.73482 (-0.73466 1.71653)
kT2 [keV] : 24.2206 (-3.28407 5.15925)
R2^2/D10^2 : 2.82355E-02 (-0.0148206 0.0224115)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.778e-07 8.839e-08
25- 50 1.227e-06 1.290e-07
50-150 2.467e-06 3.337e-07
15-150 4.272e-06 4.272e-07
Peak spectrum fit
Power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25150 ( -0.10522 0.104898 )
Norm@50keV : 7.06786E-02 ( -0.00437781 0.00437778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.068698e-01
Photon flux (15-150 keV) in 1 sec: 8.36140 ( -0.537908 0.538592 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07069e-07 ( -4.77356e-08 4.78631e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.913671 ( -0.457088 0.369939 )
Epeak [keV] : 178.894 ( -72.6107 -178.894 )
Norm@50keV : 0.101471 ( -0.0328174 0.0614858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.96 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 56 degrees of freedom
# Null hypothesis probability = 3.340388e-01
Photon flux (15-150 keV) in 1 sec: 8.26026 ( -0.55179 0.55235 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.9795e-07 ( -4.999e-08 4.9695e-08 ) ergs/cm2
Band function
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.747632 ( 0.718722 0.718722 )
beta : -1.45313 ( 1.46666 0.256751 )
Epeak [keV] : 122.788 ( -117.484 639.558 )
Norm@50keV : 0.126241 ( -0.0621876 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.64 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.108329e-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] : 18.6635 (-1.45543 1.61243)
R^2/D10^2 : 0.485915 (-0.117976 0.152255)
(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 3.348e-08 3.960e-09
25- 50 1.590e-07 1.425e-08
50-150 4.055e-07 4.100e-08
15-150 5.980e-07 4.775e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-12.5792 -200)
Norm : 34.8561 (-2.19421 2.19421)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.678e-08 6.315e-09
25- 50 1.669e-07 1.435e-08
50-150 3.661e-07 8.340e-08
15-150 6.198e-07 1.010e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.35557 (-2.79134 2.76868)
R1^2/D10^2 : 2.84709 (-1.39036 5.15528)
kT2 [keV] : 34.0590 (-8.75693 26.2543)
R2^2/D10^2 : 5.10167E-02 (-0.0410212 0.096855)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.797e-08 1.692e-08
25- 50 1.668e-07 3.957e-08
50-150 4.742e-07 2.090e-07
15-150 6.989e-07 2.181e-07
Plot creation:
Wed Mar 29 15:28:22 EDT 2023