batgrbproduct analysis for trigger=1078701
batgrbproduct Analysis for Trigger=1078701
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): Sun Oct 10 19:29:08 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1078701/batgroup_hand_proc
======================================================================
Trigger: 01078701 Segment: 000
BAT Trigger Time: 655555383.904 [s; MET]
Trigger Stop: 655555383.968 [s; MET]
UTC: 2021-10-10T10:42:36.027440 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 287.080395726662 Dec: 29.8220019747643 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.5
Image Trigger?: NO
Rate S/N Ratio: 6.48074069840786 [ if not an image trigger ]
Image S/N Ratio: 6.5
Flight Position: [ source = BAT ]
RA: 287.080395726662 Dec: 29.8220019747643 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 287.009873709878 Dec: 29.8121942561125 [deg; J2000]
{ 19h 08m 02.4s , +29d 48' 43.9" }
+/- 4.72835558515291 [arcmin] (estimated 90% radius based on SNR)
+/- 3.49644044551281 [arcmin] (formal 1-sigma fit error)
SNR: 3.30557310872394
Angular difference between Flight and Ground position is 3.718031 arcmin
Partial Coding Fraction: 0.3867188 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 5.96046447753906e-08
to: 0.0640000700950623 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.020099 0.002802 -0.007275 -0.002044
0.003793 0.002761 0.002618 0.001504 [error]
Peak 0.020099 0.002802 -0.007275 -0.002044
0.003793 0.002761 0.002618 0.001504 [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 3.86e-09 1.54e-09 3.36e-10 1.01e-10 5.75e-09 5.92e-09 erg/cm2
Error 1.92e-09 1.06e-09 4.56e-10 2.36e-10 3.08e-09 3.13e-09 erg/cm2
Peak flux Power-law 2.05e+00 4.68e-01 5.47e-02 7.01e-03 2.58e+00 2.58e+00 ph/cm2/s
Error 1.03e+00 3.13e-01 6.78e-02 1.53e-02 1.28e+00 1.28e+00 ph/cm2/s
Fluence Cutoff-PL 6.00e-09 1.34e-09 2.70e-13 1.79e-23 7.35e-09 7.34e-09 erg/cm2
Error 2.30e-09 1.11e-09 8.79e-12 1.04e-16 2.85e-09 2.85e-09 erg/cm2
Peak flux Cutoff-PL 3.09e+00 4.34e-01 3.88e-05 8.81e-16 3.53e+00 3.53e+00 ph/cm2/s
Error 1.20e+00 3.70e-01 1.65e-03 1.09e-08 1.34e+00 1.34e+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 4.032 1.139 - - 4.05e-03 4.08e-03 55.750 57
CPL 1.000 0.000 50.0 0.0 5.05e-03 0.00e+00 66.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.032 1.139 - - 4.05e-03 4.08e-03 55.750 57
CPL 1.000 0.000 50.0 0.0 5.05e-03 0.00e+00 66.260 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.0099 +29.8122 0.0582 46.6 -8.3 0.0182 3.3 TRIG_01078701
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.904 -7.904 (delta_t = 53.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.03198 ( -0.903677 1.37517 )
Norm@50keV : 4.04707E-03 ( -0.00400158 0.00416588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 0.9780 for 57 degrees of freedom
# Null hypothesis probability = 5.221094e-01
Photon flux (15-150 keV) in 0.064 sec: 2.58240 ( -1.28313 1.28089 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.74659e-09 ( -3.07277e-09 3.08012e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.04931E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.26 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 56 degrees of freedom
# Null hypothesis probability = 1.639724e-01
Photon flux (15-150 keV) in 0.064 sec: 3.53415 3.55136 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32786e-14 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.32162 ( 1.24546 1.24546 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 17.3270 ( -3.4072 4.11025 )
Norm@50keV : 2.10669E+04 ( -20902.7 97003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 55 degrees of freedom
# Null hypothesis probability = 6.664903e-01
Photon flux (15-150 keV) in 0.064 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] : 3.88196 (-0.995464 1.27619)
R^2/D10^2 : 101.495 (-100.662 389.692)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 59 PHA bins.
# Reduced chi-squared = 0.8975 for 57 degrees of freedom
# Null hypothesis probability = 6.928180e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.100e-09 3.222e-09
25- 50 1.689e-09 1.235e-09
50-150 1.709e-11 2.325e-11
15-150 6.806e-09 4.272e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.29400 (-3.77125 7.49352)
Norm : 120.651 (-122.171 344.891)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.543e-09 2.942e-09
25- 50 1.768e-09 1.234e-09
50-150 9.875e-11 1.132e-10
15-150 6.410e-09 4.230e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89746 (-0.98819 1.28281)
R1^2/D10^2 : 99.5149 (-99.8692 390.752)
kT2 [keV] : 4.15335E-02 (-0.0415335 -0.0415335)
R2^2/D10^2 : 7.00358E-02 (-0.0700403 -0.0700403)
------------------------------------------------------------
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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.03198 ( -0.903677 1.37517 )
Norm@50keV : 4.04707E-03 ( -0.00400158 0.00416588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 0.9780 for 57 degrees of freedom
# Null hypothesis probability = 5.221094e-01
Photon flux (15-150 keV) in 0.064 sec: 2.58240 ( -1.28313 1.28089 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.74659e-09 ( -3.07277e-09 3.08012e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.04931E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.26 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 56 degrees of freedom
# Null hypothesis probability = 1.639724e-01
Photon flux (15-150 keV) in 0.064 sec: 3.53415 3.55136 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32786e-14 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.32162 ( 1.24546 1.24546 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 17.3270 ( -3.4072 4.11025 )
Norm@50keV : 2.10669E+04 ( -20902.7 97003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 55 degrees of freedom
# Null hypothesis probability = 6.664903e-01
Photon flux (15-150 keV) in 0.064 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] : 3.88196 (-0.995464 1.27619)
R^2/D10^2 : 101.495 (-100.662 389.692)
(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 5.100e-09 3.148e-09
25- 50 1.689e-09 1.193e-09
50-150 1.709e-11 2.158e-11
15-150 6.806e-09 4.288e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.29400 (-3.77125 7.49352)
Norm : 120.651 (-122.171 344.891)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.543e-09 2.756e-09
25- 50 1.768e-09 1.247e-09
50-150 9.875e-11 1.168e-10
15-150 6.410e-09 4.064e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89746 (-0.98819 1.28281)
R1^2/D10^2 : 99.5149 (-99.8692 390.752)
kT2 [keV] : 4.15335E-02 (-0.0415335 -0.0415335)
R2^2/D10^2 : 7.00358E-02 (-0.0700403 -0.0700403)
------------------------------------------------------------
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:
Sun Oct 10 22:36:07 EDT 2021