batgrbproduct analysis for trigger=1136936
batgrbproduct Analysis for Trigger=1136936
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): Thu Nov 10 12:03:16 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1136936/batgroup_hand_proc
======================================================================
Trigger: 01136936 Segment: 000
BAT Trigger Time: 689740127.744 [s; MET]
Trigger Stop: 689740128.768 [s; MET]
UTC: 2022-11-10T02:28:17.554360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 29.119436251407 Dec: -27.3142945105164 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.01
Image Trigger?: NO
Rate S/N Ratio: 13.3790881602597 [ if not an image trigger ]
Image S/N Ratio: 8.01
Flight Position: [ source = BAT ]
RA: 29.119436251407 Dec: -27.3142945105164 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 29.1061881017316 Dec: -27.2976008251396 [deg; J2000]
{ 01h 56m 25.5s , -27d 17' 51.4" }
+/- 1.49009744901039 [arcmin] (estimated 90% radius based on SNR)
+/- 0.580864329355719 [arcmin] (formal 1-sigma fit error)
SNR: 17.2055614751203
Angular difference between Flight and Ground position is 1.225612 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 8.9799998998642 +/- 2.10693811743884
Measured from: 0.0680000782012939
to: 9.04799997806549 [s; relative to TRIGTIME]
T50: 3.83999991416931 +/- 0.761146524130931
Measured from: 1.26400005817413
to: 5.10399997234344 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.516000032424927
to: 1.51600003242493 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.407999992370605
to: 9.73600006103516 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.218267 0.301965 0.235325 0.038164
0.024014 0.025624 0.022905 0.018603 [error]
Peak 0.036523 0.061698 0.043253 -0.000346
0.007870 0.008430 0.007750 0.005933 [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 6.23e-08 1.21e-07 1.81e-07 5.87e-07 5.09e-07 9.50e-07 erg/cm2
Error 9.87e-09 1.16e-08 2.21e-08 1.56e-07 5.39e-08 1.72e-07 erg/cm2
Peak flux Power-law 3.90e-01 3.76e-01 2.53e-01 2.66e-01 1.13e+00 1.29e+00 ph/cm2/s
Error 9.71e-02 6.42e-02 5.91e-02 1.19e-01 1.90e-01 2.28e-01 ph/cm2/s
Fluence Cutoff-PL 6.09e-08 1.23e-07 1.83e-07 4.68e-07 5.04e-07 8.33e-07 erg/cm2
Error 1.13e-08 1.39e-08 2.37e-08 2.11e-07 5.91e-08 2.29e-07 erg/cm2
Peak flux Cutoff-PL 3.12e-01 4.59e-01 2.63e-01 4.50e-02 1.07e+00 1.08e+00 ph/cm2/s
Error 1.20e-01 9.38e-02 7.63e-02 8.74e-02 1.96e-01 2.06e-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 1.415 0.163 - - 5.21e-03 4.89e-04 0.000 0
CPL 1.276 0.556 261.5 0.0 6.13e-03 5.54e-03 0.000 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.571 0.273 - - 8.84e-03 1.64e-03 0.000 0
CPL -0.264 1.782 54.9 28.6 9.08e-02 5.92e-01 0.000 0
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: 6.656000 sec.
T50 in the 50-300 keV band: 3.200000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 10.144 -0.408 9.736
T90 8.980 0.068 9.048
T50 3.840 1.264 5.104
Peak 1.000 0.516 1.516
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
29.1062 -27.2976 0.0112 17.7 -68.6 0.8266 17.2 TRIG_01136936
------------------------------------------
Foreground time interval of the image:
-0.408 9.736 (delta_t = 10.144 [sec])
Background time interval of the image:
-239.744 -0.408 (delta_t = 239.336 [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 -0.408 sec. to 9.736 sec.
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41482 ( -0.161959 0.163226 )
Norm@50keV : 5.21053E-03 ( -0.00049048 0.000487984 )
------------------------------------------------------------
Reduced chi-squared =
Photon flux (15-150 keV) in 10.14 sec: 0.636713 ( -0.0589923 0.059058 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.09005e-07 ( -5.36674e-08 5.42047e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.408 sec. to 9.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27576 ( -0.700247 0.411849 )
Epeak [keV] : 261.512 ( -261.512 -261.512 )
Norm@50keV : 6.13055E-03 ( -0.00359539 0.0074862 )
------------------------------------------------------------
Reduced chi-squared =
Photon flux (15-150 keV) in 10.14 sec: 0.632962 ( -0.061397 0.061123 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03633e-07 ( -6.00014e-08 5.82878e-08 ) ergs/cm2
Band function
Time interval is from -0.408 sec. to 9.736 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06135 ( 1.07152 1.07152 )
beta : -1.55693 ( 1.55565 0.292174 )
Epeak [keV] : 117.817 ( -122.727 9241.55 )
Norm@50keV : 8.10726E-03 ( -0.00289587 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.65 using 59 PHA bins.
# Reduced chi-squared = 0.8300 for 55 degrees of freedom
# Null hypothesis probability = 8.114906e-01
Photon flux (15-150 keV) in 10.14 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] : 15.4152 (-1.7634 2.04255)
R^2/D10^2 : 6.66283E-02 (-0.0232381 0.0347345)
(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 3.345e-08 5.942e-09
25- 50 1.362e-07 1.785e-08
50-150 2.229e-07 4.472e-08
15-150 3.927e-07 5.045e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-44.5296 -200)
Norm : 2.60131 (-0.239331 0.239331)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.599e-08 8.279e-09
25- 50 1.269e-07 1.977e-08
50-150 2.784e-07 1.510e-07
15-150 4.713e-07 1.884e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.77967 (-3.80294 4.00596)
R1^2/D10^2 : 0.440230 (-0.269378 0.802848)
kT2 [keV] : 29.3711 (-11.0912 -29.8822)
R2^2/D10^2 : 5.68957E-03 (-0.00520854 0.0248998)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.570e-08 2.914e-08
25- 50 1.279e-07 4.820e-08
50-150 3.153e-07 1.644e-07
15-150 4.989e-07 2.418e-07
Peak spectrum fit
Power-law model
Time interval is from 0.516 sec. to 1.516 sec.
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57113 ( -0.267238 0.279104 )
Norm@50keV : 8.84310E-03 ( -0.00165176 0.00162249 )
------------------------------------------------------------
Reduced chi-squared =
Photon flux (15-150 keV) in 1 sec: 1.12646 ( -0.190468 0.190483 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.30027e-08 ( -1.65319e-08 1.69609e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.516 sec. to 1.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.263786 ( -2.09358 1.47133 )
Epeak [keV] : 54.8666 ( -11.2591 46.0018 )
Norm@50keV : 9.07754E-02 ( -0.0907901 1.09415 )
------------------------------------------------------------
Reduced chi-squared =
Photon flux (15-150 keV) in 1 sec: 1.07273 ( -0.195404 0.19579 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.19468e-08 ( -1.59778e-08 1.837e-08 ) ergs/cm2
Band function
Time interval is from 0.516 sec. to 1.516 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.325269 ( -1.6291 -0.412087 )
beta : -2.55793 ( 2.93412 1.19339 )
Epeak [keV] : 60.4306 ( -22.6067 25.9787 )
Norm@50keV : 4.29772E-02 ( -0.0899077 104.253 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.76 using 59 PHA bins.
# Reduced chi-squared = 0.9956 for 55 degrees of freedom
# Null hypothesis probability = 4.839031e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42734e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0222 (-2.05478 2.44119)
R^2/D10^2 : 0.225403 (-0.103857 0.187328)
(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 8.107e-09 2.488e-09
25- 50 2.797e-08 6.510e-09
50-150 3.002e-08 1.108e-08
15-150 6.610e-08 1.669e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 162.026 (-82.6948 -160.008)
Norm : 4.69877 (-0.811956 1.02214)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-08 6.810e-09
25- 50 2.246e-08 1.238e-08
50-150 4.572e-08 2.718e-08
15-150 8.015e-08 4.611e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.32865 (-4.33251 -4.33251)
R1^2/D10^2 : 2.92379 (-2.92481 -2.92481)
kT2 [keV] : 14.4344 (-2.93514 -14.4361)
R2^2/D10^2 : 0.143727 (-0.143682 0.200166)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-08 5.260e-09
25- 50 2.589e-08 1.443e-08
50-150 3.369e-08 2.068e-08
15-150 6.973e-08 3.815e-08
Plot creation:
Thu Nov 10 12:44:09 EST 2022