batgrbproduct analysis for trigger=1001130
batgrbproduct Analysis for Trigger=1001130
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 Oct 22 16:03:34 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1001130/batgroup_hand_proc
======================================================================
Trigger: 01001130 Segment: 000
BAT Trigger Time: 625004864.512 [s; MET]
Trigger Stop: 625004868.608 [s; MET]
UTC: 2020-10-21T20:27:18.666520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 12.549823305115 Dec: -55.8391953004332 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.84
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 11.84
Flight Position: [ source = BAT ]
RA: 12.549823305115 Dec: -55.8391953004332 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 12.5027063045929 Dec: -55.8622169329192 [deg; J2000]
{ 00h 50m 00.6s , -55d 51' 44.0" }
+/- 1.33561873831976 [arcmin] (estimated 90% radius based on SNR)
+/- 0.65401575824606 [arcmin] (formal 1-sigma fit error)
SNR: 20.1174044141466
Angular difference between Flight and Ground position is 2.103901 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 24.3839999437332 +/- 6.76097773129311
Measured from: -3.12000000476837
to: 21.2639999389648 [s; relative to TRIGTIME]
T50: 9.70799994468689 +/- 2.4339737203546
Measured from: 1.1360000371933
to: 10.8439999818802 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -3.62399995326996
to: -2.62399995326996 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.18799996376038
to: 27.9520000219345 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.522343 0.630853 0.466862 0.104708
0.045453 0.047545 0.041327 0.035200 [error]
Peak 0.042761 0.044248 0.030672 0.009365
0.008366 0.008668 0.007357 0.006306 [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 1.58e-07 2.69e-07 3.48e-07 9.12e-07 1.02e-06 1.69e-06 erg/cm2
Error 2.14e-08 2.24e-08 4.08e-08 2.27e-07 9.63e-08 2.60e-07 erg/cm2
Peak flux Power-law 4.31e-01 3.27e-01 1.65e-01 1.20e-01 9.78e-01 1.04e+00 ph/cm2/s
Error 1.19e-01 6.78e-02 5.59e-02 7.56e-02 2.02e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 1.57e-07 2.70e-07 3.49e-07 8.03e-07 1.02e-06 1.53e-06 erg/cm2
Error 2.34e-08 2.54e-08 4.20e-08 4.16e-07 1.02e-07 4.09e-07 erg/cm2
Peak flux Cutoff-PL 4.02e-01 3.67e-01 1.63e-01 3.86e-02 9.62e-01 9.71e-01 ph/cm2/s
Error 1.31e-01 9.06e-02 6.69e-02 9.25e-02 2.02e-01 2.15e-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 1.626 0.149 - - 3.42e-03 2.97e-04 46.120 0
CPL 1.587 0.579 520.2 0.0 3.58e-03 2.45e-03 46.100 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.984 0.367 - - 6.57e-03 1.72e-03 55.220 0
CPL 1.074 1.389 41.9 -0.7 2.26e-02 1.24e-01 0.559 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: 24.768000 sec.
T50 in the 50-300 keV band: 14.528000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 32.140 -4.188 27.952
T90 24.384 -3.120 21.264
T50 9.708 1.136 10.844
Peak 1.000 -3.624 -2.624
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
12.5027 -55.8622 0.0095 29.1 13.0 1.8343 20.1 TRIG_01001130
------------------------------------------
Foreground time interval of the image:
-4.188 27.952 (delta_t = 32.140 [sec])
Background time interval of the image:
-239.512 -4.188 (delta_t = 235.324 [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 -4.188 sec. to 27.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62581 ( -0.147865 0.150274 )
Norm@50keV : 3.41863E-03 ( -0.000298827 0.000295849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.12 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.48e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 32.14 sec: 0.442895 ( -0.0367565 0.0368094 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02449e-06 ( -9.58145e-08 9.6724e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.188 sec. to 27.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58725 ( -0.557491 0.600068 )
Epeak [keV] : 520.239 ( -520.239 -520.239 )
Norm@50keV : 3.58057E-03 ( -0.0016242 0.00326769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.25e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 32.14 sec: 0.441932 ( -0.038007 0.0375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01867e-06 ( -1.02732e-07 1.01877e-07 ) ergs/cm2
Band function
Time interval is from -4.188 sec. to 27.952 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.962470 ( 1.17312 1.17312 )
beta : -1.65119 ( 1.65104 0.169266 )
Epeak [keV] : 41.2608 ( -41.5672 -41.5672 )
Norm@50keV : 1.03365E-02 ( -0.0105929 510861 )
------------------------------------------------------------
Photon flux (15-150 keV) in 32.14 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] : 13.6797 (-1.54275 1.76315)
R^2/D10^2 : 6.61888E-02 (-0.0232417 0.0356284)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 92.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.26e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.425e-08 1.351e-08
25- 50 3.061e-07 3.579e-08
50-150 3.727e-07 6.738e-08
15-150 7.631e-07 7.890e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 168.888 (-56.9103 -168.751)
Norm : 1.80500 (-0.160967 0.18558)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.23e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.473e-07 2.460e-08
25- 50 2.776e-07 8.892e-08
50-150 5.742e-07 2.987e-07
15-150 9.992e-07 4.421e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.05671 (-1.28685 1.5517)
R1^2/D10^2 : 0.861327 (-0.479033 1.30511)
kT2 [keV] : 25.1406 (-5.06437 8.92637)
R2^2/D10^2 : 6.20384E-03 (-0.00400785 0.0078735)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.41 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.18e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.586e-07 5.456e-08
25- 50 2.634e-07 8.496e-08
50-150 5.948e-07 2.352e-07
15-150 1.017e-06 3.408e-07
Peak spectrum fit
Power-law model
Time interval is from -3.624 sec. to -2.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98377 ( -0.346917 0.38614 )
Norm@50keV : 6.57166E-03 ( -0.0017547 0.00169303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.42e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.978465 ( -0.201843 0.201844 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.05559e-08 ( -1.49249e-08 1.5531e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.624 sec. to -2.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07428 ( -1.71235 1.06529 )
Epeak [keV] : 41.9392 ( -40.5955 -41.9419 )
Norm@50keV : 2.25548E-02 ( -0.0225439 0.224864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.59e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.962492 ( -0.201346 0.202128 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.63568e-08 ( -1.48202e-08 1.63857e-08 ) ergs/cm2
Band function
Time interval is from -3.624 sec. to -2.624 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95091 ( -7.64822 -4.95091 )
beta : -2.36286 ( -0.749661 0.4993 )
Epeak [keV] : 25.1490 ( -8.21142 4.82633 )
Norm@50keV : 1037.05 ( -209.322 18487.9 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.62717e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.76572 (-2.54207 3.39706)
R^2/D10^2 : 0.511306 (-0.3446 1.11179)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.94e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.847e-09 3.965e-09
25- 50 2.367e-08 8.600e-09
50-150 1.153e-08 6.556e-09
15-150 4.504e-08 1.702e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.4534 (-28.5162 74.0808)
Norm : 5.02872 (-1.40008 1.97402)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.86 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.94e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.280e-08 3.788e-09
25- 50 1.999e-08 5.825e-09
50-150 2.440e-08 1.625e-08
15-150 5.718e-08 2.157e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.17903 (-1.79821 2.48593)
R1^2/D10^2 : 3.90321 (-3.00514 7.53394)
kT2 [keV] : 17.3406 (-5.68508 12.1576)
R2^2/D10^2 : 4.19294E-02 (-0.0338409 0.169994)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.88e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.346e-08 7.785e-09
25- 50 1.924e-08 9.870e-09
50-150 2.516e-08 1.537e-08
15-150 5.786e-08 3.047e-08
Plot creation:
Thu Oct 22 16:13:04 EDT 2020