batgrbproduct analysis for trigger=1090472
batgrbproduct Analysis for Trigger=1090472
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 Dec 22 17:46:41 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1090472/batgroup_hand_proc
======================================================================
Trigger: 01090472 Segment: 000
BAT Trigger Time: 661812549.12 [s; MET]
Trigger Stop: 661812550.144 [s; MET]
UTC: 2021-12-21T20:48:40.822240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 78.9375331088164 Dec: 0.940451696142954 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: NO
Rate S/N Ratio: 13.8924439894498 [ if not an image trigger ]
Image S/N Ratio: 7.09
Flight Position: [ source = BAT ]
RA: 78.9375331088164 Dec: 0.940451696142954 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 78.9093186256411 Dec: 0.892637016724957 [deg; J2000]
{ 05h 15m 38.2s , +00d 53' 33.5" }
+/- 2.2464824317618 [arcmin] (estimated 90% radius based on SNR)
+/- 0.665951625784478 [arcmin] (formal 1-sigma fit error)
SNR: 9.57130595633718
Angular difference between Flight and Ground position is 3.330998 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 671.667999982834 +/- 105.9621365891
Measured from: -87.0600000619888
to: 584.607999920845 [s; relative to TRIGTIME]
T50: 344.947999954224 +/- 53.1888411241704
Measured from: 21.7000000476837
to: 366.648000001907 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.271999955177307
to: 0.728000044822693 [s; relative to TRIGTIME]
Total Fluence
Measured from: -129.396000027657
to: 688.363999962807 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.985962 2.463375 1.772724 1.178108
0.139140 0.143355 0.127429 0.121996 [error]
Peak 0.011511 0.026276 0.021356 0.013766
0.005361 0.005822 0.005166 0.004790 [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 5.24e-07 9.74e-07 1.39e-06 4.22e-06 3.97e-06 7.11e-06 erg/cm2
Error 6.29e-08 6.66e-08 1.29e-07 8.79e-07 3.03e-07 9.68e-07 erg/cm2
Peak flux Power-law 1.17e-01 1.54e-01 1.49e-01 2.57e-01 5.05e-01 6.77e-01 ph/cm2/s
Error 5.62e-02 4.53e-02 4.01e-02 1.54e-01 1.24e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 5.26e-07 9.76e-07 1.39e-06 4.15e-06 3.96e-06 7.04e-06 erg/cm2
Error 6.30e-08 6.67e-08 1.29e-07 7.29e-07 3.04e-07 1.03e-06 erg/cm2
Peak flux Cutoff-PL 1.16e-01 1.55e-01 1.50e-01 2.39e-01 5.04e-01 6.60e-01 ph/cm2/s
Error 6.36e-02 4.86e-02 4.45e-02 2.27e-01 1.25e-01 2.20e-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 1.483 0.129 - - 5.10e-04 3.43e-05 68.160 57
CPL 1.481 0.133 10000.0 0.0 5.12e-04 0.00e+00 68.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.050 0.435 - - 4.38e-03 1.05e-03 48.790 57
CPL 0.991 0.000 930.7 0.0 4.67e-03 0.00e+00 48.780 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: 17.856000 sec.
T50 in the 50-300 keV band: 8.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 817.760 -129.396 688.364
T90 671.668 -87.060 584.608
T50 344.948 21.700 366.648
Peak 1.000 -0.272 0.728
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
78.9093 +0.8926 0.0201 7.1 73.1 1.7548 9.6 TRIG_01090472
------------------------------------------
Foreground time interval of the image:
-129.396 15.181 (delta_t = 144.577 [sec])
Background time interval of the image:
-239.120 -129.396 (delta_t = 109.724 [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 -129.396 sec. to 688.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48279 ( -0.128642 0.129021 )
Norm@50keV : 5.10491E-04 ( -3.44444e-05 3.42197e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.16 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 57 degrees of freedom
# Null hypothesis probability = 1.479724e-01
Photon flux (15-150 keV) in 817.8 sec: 6.34388E-02 ( -0.00418557 0.00419442 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.97181e-06 ( -3.01915e-07 3.05003e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -129.396 sec. to 688.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48076 ( -0.147691 0.11922 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 5.11994E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.21 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 56 degrees of freedom
# Null hypothesis probability = 1.268802e-01
Photon flux (15-150 keV) in 817.8 sec: 6.34122E-02 ( -0.0041885 0.0041889 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.96478e-06 ( -2.95708e-07 3.11827e-07 ) ergs/cm2
Band function
Time interval is from -129.396 sec. to 688.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13294 ( 1.12878 1.12878 )
beta : -1.48386 ( -0.143322 0.129965 )
Epeak [keV] : 44.6153 ( -46.6212 -46.6212 )
Norm@50keV : 1.03669E-03 ( -0.000411125 55494.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.15 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 55 degrees of freedom
# Null hypothesis probability = 1.096643e-01
Photon flux (15-150 keV) in 817.8 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] : 14.7254 ( )
R^2/D10^2 : 7.17465E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 166.16 using 59 PHA bins.
# Reduced chi-squared = 2.9151 for 57 degrees of freedom
# Null hypothesis probability = 1.309649e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.671e-07 3.488e-08
25- 50 1.043e-06 9.405e-08
50-150 1.527e-06 2.347e-07
15-150 2.837e-06 2.519e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-34.9316 -200)
Norm : 0.257476 (-0.0166893 0.0166893)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.244e-07 3.733e-08
25- 50 1.009e-06 9.037e-08
50-150 2.212e-06 7.103e-07
15-150 3.745e-06 6.739e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65797 (-0.975298 1.14834)
R1^2/D10^2 : 9.49200E-02 (-0.0415586 0.0776511)
kT2 [keV] : 39.8453 (-9.84312 22.0744)
R2^2/D10^2 : 2.49688E-04 (-0.000165405 0.000319456)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.652e-07 1.139e-07
25- 50 9.347e-07 1.675e-07
50-150 2.808e-06 9.912e-07
15-150 4.308e-06 1.081e-06
Peak spectrum fit
Power-law model
Time interval is from -0.272 sec. to 0.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04954 ( -0.451703 0.418216 )
Norm@50keV : 4.37667E-03 ( -0.00104983 0.00104761 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.79 using 59 PHA bins.
# Reduced chi-squared = 0.8560 for 57 degrees of freedom
# Null hypothesis probability = 7.721976e-01
Photon flux (15-150 keV) in 1 sec: 0.505458 ( -0.123311 0.123837 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.65202e-08 ( -1.22883e-08 1.25196e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.272 sec. to 0.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.991066 ( )
Epeak [keV] : 930.671 ( )
Norm@50keV : 4.66813E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.78 using 59 PHA bins.
# Reduced chi-squared = 0.8712 for 56 degrees of freedom
# Null hypothesis probability = 7.420747e-01
Photon flux (15-150 keV) in 1 sec: 0.504353 ( -0.126338 0.124562 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.63623e-08 ( -1.34441e-08 1.26387e-08 ) ergs/cm2
Band function
Time interval is from -0.272 sec. to 0.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90015 ( -4.90015 -4.90015 )
beta : -1.18670 ( -0.605792 0.518345 )
Epeak [keV] : 30.1706 ( -30.1706 51.562 )
Norm@50keV : 93.7510 ( -22.2341 1.39977e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.24 using 59 PHA bins.
# Reduced chi-squared = 0.8771 for 55 degrees of freedom
# Null hypothesis probability = 7.286591e-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] : 20.6673 (-6.5381 11.2502)
R^2/D10^2 : 2.12692E-02 (-0.0155326 0.0514261)
(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 1.728e-09 1.079e-09
25- 50 8.793e-09 4.665e-09
50-150 2.795e-08 1.695e-08
15-150 3.847e-08 1.961e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-81.3059 -200)
Norm : 2.04560 (-0.508374 0.508374)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.094e-09 3.094e-09
25- 50 9.798e-09 5.840e-09
50-150 2.149e-08 1.299e-08
15-150 3.638e-08 2.185e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.32210 (-5.03942 8.828)
R1^2/D10^2 : 0.235431 (-0.188448 2.99404)
kT2 [keV] : 37.6008 (-41.4478 -42.97)
R2^2/D10^2 : 2.70610E-03 (-0.0019177 0.0179008)
------------------------------------------------------------
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:
Wed Dec 22 18:10:23 EST 2021