batgrbproduct analysis for trigger=1098633
batgrbproduct Analysis for Trigger=1098633
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): Tue Mar 22 16:10:49 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1098633/GCN5_download_cron
======================================================================
Trigger: 01098633 Segment: 000
BAT Trigger Time: 669572592 [s; MET]
Trigger Stop: 669572664 [s; MET]
UTC: 2022-03-21T16:22:43.178280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.668556533171 Dec: 35.3978858372273 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.13
Flight Position: [ source = BAT ]
RA: 299.668556533171 Dec: 35.3978858372273 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.666032809955 Dec: 35.3783329431996 [deg; J2000]
{ 19h 58m 39.8s , +35d 22' 42.0" }
+/- 1.56240073706533 [arcmin] (estimated 90% radius based on SNR)
+/- 0.558741040017203 [arcmin] (formal 1-sigma fit error)
SNR: 16.0794816368011
Angular difference between Flight and Ground position is 1.179651 arcmin
Partial Coding Fraction: 0.6640625 [ including projection effects ]
Duration
T90: 72 +/-
Measured from: 0
to: 72 [s; relative to TRIGTIME]
T50: 72 +/-
Measured from: 0
to: 72 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 72 second)
Measured from: 0
to: 72 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 72 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.743943 1.035092 0.667135 0.105696
0.061994 0.063693 0.056088 0.050806 [error]
Peak 0.743943 1.035092 0.667135 0.105696
0.061994 0.063693 0.056088 0.050806 [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 2.67e-07 4.21e-07 5.00e-07 1.15e-06 1.52e-06 2.34e-06 erg/cm2
Error 3.06e-08 3.09e-08 5.42e-08 2.57e-07 1.28e-07 3.07e-07 erg/cm2
Peak flux Power-law 1.20e-01 1.04e-01 6.19e-02 5.51e-02 3.10e-01 3.42e-01 ph/cm2/s
Error 1.40e-02 7.74e-03 6.48e-03 1.14e-02 2.30e-02 2.50e-02 ph/cm2/s
Fluence Cutoff-PL 2.48e-07 4.50e-07 5.03e-07 4.66e-07 1.44e-06 1.67e-06 erg/cm2
Error 3.51e-08 4.06e-08 5.95e-08 3.99e-07 1.45e-07 4.24e-07 erg/cm2
Peak flux Cutoff-PL 1.11e-01 1.11e-01 6.31e-02 2.72e-02 3.02e-01 3.12e-01 ph/cm2/s
Error 1.63e-02 9.83e-03 7.11e-03 1.81e-02 2.40e-02 3.01e-02 ph/cm2/s
Fluence Band 2.43e-07 4.55e-07 4.87e-07 7.68e-07 1.45e-06 1.96e-06 erg/cm2
Error 3.61e-08 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.11e-01 1.11e-01 6.31e-02 2.77e-02 3.02e-01 3.13e-01 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 1.753 0.130 - - 2.29e-03 1.84e-04 62.380 57
CPL 1.162 0.562 64.8 67.3 4.79e-03 3.75e-03 58.600 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.753 0.130 - - 2.29e-03 1.84e-04 62.380 57
CPL 1.162 0.562 64.8 67.3 4.79e-03 3.75e-03 58.600 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 72.000 0.000 72.000
T90 72.000 0.000 72.000
T50 72.000 0.000 72.000
Peak 72.000 0.000 72.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.6660 +35.3783 0.0120 33.5 6.3 2.7844 16.1 TRIG_01098633
------------------------------------------
Foreground time interval of the image:
0.000 72.000 (delta_t = 72.000 [sec])
Background time interval of the image:
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 0.000 sec. to 72.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75330 ( -0.129034 0.1318 )
Norm@50keV : 2.29150E-03 ( -0.00018542 0.00018353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.38 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 57 degrees of freedom
# Null hypothesis probability = 2.909112e-01
Photon flux (15-150 keV) in 72 sec: 0.310228 ( -0.0229658 0.0229871 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52212e-06 ( -1.26921e-07 1.28177e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16203 ( -0.600907 0.523459 )
Epeak [keV] : 64.7502 ( -14.4207 120.224 )
Norm@50keV : 4.78664E-03 ( -0.00225212 0.00524784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.60 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 56 degrees of freedom
# Null hypothesis probability = 3.804142e-01
Photon flux (15-150 keV) in 72 sec: 0.302189 ( -0.02403 0.024016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44296e-06 ( -1.43518e-07 1.45663e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18061 ( -0.505394 0.416007 )
beta : -9.37165 ( 9.37167 19.3717 )
Epeak [keV] : 65.7056 ( -14.4597 62.1567 )
Norm@50keV : 4.66515E-03 ( -0.00213367 0.00103172 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.60 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.448177e-01
Photon flux (15-150 keV) in 72 sec: 0.302450 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45381e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1177 (-1.0595 1.16593)
R^2/D10^2 : 7.20644E-02 (-0.0208556 0.0291385)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.62 using 59 PHA bins.
# Reduced chi-squared = 1.625 for 57 degrees of freedom
# Null hypothesis probability = 1.995355e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.613e-07 2.110e-08
25- 50 5.134e-07 4.738e-08
50-150 4.562e-07 8.363e-08
15-150 1.131e-06 9.468e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 110.968 (-28.0206 43.7233)
Norm : 1.33995 (-0.126803 0.151988)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.519e-07 2.617e-08
25- 50 4.444e-07 4.046e-08
50-150 7.622e-07 2.688e-07
15-150 1.459e-06 2.822e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53744 (-1.53572 1.77763)
R1^2/D10^2 : 0.448756 (-0.239299 0.675749)
kT2 [keV] : 21.4623 (-4.66101 9.592)
R2^2/D10^2 : 6.36533E-03 (-0.0048215 0.0073474)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.450e-07 7.974e-08
25- 50 4.514e-07 1.190e-07
50-150 7.392e-07 3.546e-07
15-150 1.436e-06 4.917e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75330 ( -0.129034 0.1318 )
Norm@50keV : 2.29150E-03 ( -0.00018542 0.00018353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.38 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 57 degrees of freedom
# Null hypothesis probability = 2.909112e-01
Photon flux (15-150 keV) in 72 sec: 0.310228 ( -0.0229658 0.0229871 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52212e-06 ( -1.26921e-07 1.28177e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16203 ( -0.600907 0.523459 )
Epeak [keV] : 64.7502 ( -14.4207 120.224 )
Norm@50keV : 4.78664E-03 ( -0.00225212 0.00524784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.60 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 56 degrees of freedom
# Null hypothesis probability = 3.804142e-01
Photon flux (15-150 keV) in 72 sec: 0.302189 ( -0.02403 0.024016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44296e-06 ( -1.43518e-07 1.45663e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 72.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18061 ( -0.505394 0.416007 )
beta : -9.37165 ( 9.37167 19.3717 )
Epeak [keV] : 65.7056 ( -14.4597 62.1567 )
Norm@50keV : 4.66515E-03 ( -0.00213367 0.00103172 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.60 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.448177e-01
Photon flux (15-150 keV) in 72 sec: 0.302450 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45381e-06 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1177 (-1.0595 1.16593)
R^2/D10^2 : 7.20644E-02 (-0.0208556 0.0291385)
(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 1.613e-07 2.135e-08
25- 50 5.134e-07 4.558e-08
50-150 4.562e-07 8.219e-08
15-150 1.131e-06 1.008e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 110.968 (-28.0206 43.7233)
Norm : 1.33995 (-0.126803 0.151988)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.519e-07 2.920e-08
25- 50 4.444e-07 3.931e-08
50-150 7.622e-07 2.680e-07
15-150 1.459e-06 2.797e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53744 (-1.53572 1.77763)
R1^2/D10^2 : 0.448756 (-0.239299 0.675451)
kT2 [keV] : 21.4623 (-4.66101 9.592)
R2^2/D10^2 : 6.36533E-03 (-0.0048215 0.0073474)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.450e-07 7.542e-08
25- 50 4.514e-07 1.220e-07
50-150 7.392e-07 3.730e-07
15-150 1.436e-06 4.437e-07
Plot creation:
Tue Mar 22 16:17:55 EDT 2022