batgrbproduct analysis for trigger=1178410
batgrbproduct Analysis for Trigger=1178410
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 Jul 9 13:23:25 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1178410/batgroup_hand_proc
======================================================================
Trigger: 01178410 Segment: 000
BAT Trigger Time: 710585678.336 [s; MET]
Trigger Stop: 710585678.784 [s; MET]
UTC: 2023-07-09T08:54:06.725300 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms
BAT
RA: 162.058436815731 Dec: -22.6263859697495 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.9
Image Trigger?: NO
Rate S/N Ratio: 21.1896201004171 [ if not an image trigger ]
Image S/N Ratio: 6.9
Flight Position: [ source = BAT ]
RA: 162.058436815731 Dec: -22.6263859697495 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 161.882028638626 Dec: -22.5300332916676 [deg; J2000]
{ 10h 47m 31.7s , -22d 31' 48.1" }
+/- 5.46660613518449 [arcmin] (estimated 90% radius based on SNR)
+/- 3.99534583047646 [arcmin] (formal 1-sigma fit error)
SNR: 2.68680303868
Angular difference between Flight and Ground position is 11.355101 arcmin
Partial Coding Fraction: 0.546875 [ including projection effects ]
Duration
T90: 0.448000073432922 +/-
Measured from: 0
to: 0.448000073432922 [s; relative to TRIGTIME]
T50: 0.448000073432922 +/-
Measured from: 0
to: 0.448000073432922 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.448000073432922 second)
Measured from: -5.96046447753906e-08
to: 0.448000013828278 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.448000073432922 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.008059 0.001978 -0.003452 -0.002450
0.006870 0.006775 0.006057 0.006222 [error]
Peak 0.008059 0.001978 -0.003452 -0.002450
0.006870 0.006775 0.006057 0.006222 [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 1.39e-11 1.58e-10 1.63e-09 1.20e-07 7.04e-09 1.22e-07 erg/cm2
Error 8.44e-10 1.64e-09 3.62e-09 1.33e-07 1.01e-08 1.34e-07 erg/cm2
Peak flux Power-law 9.44e-04 5.59e-03 2.88e-02 6.56e-01 9.28e-02 6.91e-01 ph/cm2/s
Error 6.10e-02 6.37e-02 6.86e-02 7.08e-01 2.07e-01 7.34e-01 ph/cm2/s
Fluence Cutoff-PL 2.07e-11 1.37e-10 1.70e-09 1.10e-07 9.23e-09 1.12e-07 erg/cm2
Error 4.07e-10 1.62e-09 4.00e-09 -------- 1.09e-08 8.97e-07 erg/cm2
Peak flux Cutoff-PL 7.23e-05 1.61e-03 2.71e-02 3.39e-01 1.13e-01 3.96e-01 ph/cm2/s
Error 4.93e-02 5.99e-02 7.11e-02 -------- 1.31e-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 -1.370 0.000 - - 3.26e-04 1.80e-03 83.400 57
CPL -10.000 0.000 154.6 0.0 3.35e-03 1.88e-02 83.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.370 0.000 - - 3.26e-04 1.80e-03 83.400 57
CPL -10.000 0.000 154.6 0.0 3.35e-03 1.88e-02 83.130 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 0.448 0.000 0.448
T90 0.448 0.000 0.448
T50 0.448 0.000 0.448
Peak 0.448 -0.000 0.448
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
161.8820 -22.5300 0.0717 35.6 -37.7 0.0324 2.7 TRIG_01178410
------------------------------------------
Foreground time interval of the image:
0.000 0.448 (delta_t = 0.448 [sec])
Background time interval of the image:
-60.336 -6.336 (delta_t = 54.000 [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 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.36992 ( 1.36193 1.36193 )
Norm@50keV : 3.25920E-04 ( -0.000327469 0.00327534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.40 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 57 degrees of freedom
# Null hypothesis probability = 1.288546e-02
Photon flux (15-150 keV) in 0.448 sec: 9.27659E-02 ( -0.0927659 0.321059 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04493e-09 ( -7.04493e-09 1.31255e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.00000 ( 1.70433 1.70433 )
Epeak [keV] : 154.566 ( -9895.78 -9895.78 )
Norm@50keV : 3.35161E-03 ( -0.00334989 0.0341542 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.13 using 59 PHA bins.
# Reduced chi-squared = 1.485 for 56 degrees of freedom
# Null hypothesis probability = 1.076369e-02
Photon flux (15-150 keV) in 0.448 sec: 0.113096 ( -0.113096 0.148721 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.31012e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( 0.0128192 0.0128192 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 238.837 ( -208.525 -239.023 )
Norm@50keV : 7.71705E-04 ( -0.000759822 0.0665682 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.29 using 59 PHA bins.
# Reduced chi-squared = 1.514 for 55 degrees of freedom
# Null hypothesis probability = 8.225537e-03
Photon flux (15-150 keV) in 0.448 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] : 200.000 (-200 -200)
R^2/D10^2 : 7.09989E-05 (-7.1171e-05 -7.1171e-05)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.46 using 59 PHA bins.
# Reduced chi-squared = 1.464 for 57 degrees of freedom
# Null hypothesis probability = 1.273053e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.481e-10 7.853e-10
25- 50 7.394e-10 8.933e-10
50-150 1.737e-10 2.345e-10
15-150 1.361e-09 1.799e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
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
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 7.02111E-05 (-7.05556e-05 -7.05556e-05)
kT2 [keV] : 5.77349 (-5.7835 -5.7835)
R2^2/D10^2 : 0.204066 (-0.203225 -0.203225)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.683e-10 1.733e-10
25- 50 5.363e-10 5.233e-10
50-150 8.840e-09 5.049e-09
15-150 9.645e-09 4.068e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.36992 ( 1.36193 1.36193 )
Norm@50keV : 3.25920E-04 ( -0.000327469 0.00327534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.40 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 57 degrees of freedom
# Null hypothesis probability = 1.288546e-02
Photon flux (15-150 keV) in 0.448 sec: 9.27659E-02 ( -0.0927659 0.321059 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04493e-09 ( -7.04493e-09 1.31255e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.00000 ( 1.70433 1.70433 )
Epeak [keV] : 154.566 ( -9895.78 -9895.78 )
Norm@50keV : 3.35161E-03 ( -0.00334989 0.0341542 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.13 using 59 PHA bins.
# Reduced chi-squared = 1.485 for 56 degrees of freedom
# Null hypothesis probability = 1.076369e-02
Photon flux (15-150 keV) in 0.448 sec: 0.113096 ( -0.113096 0.148721 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.31012e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( 0.0128192 0.0128192 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 238.837 ( -226.597 -239.023 )
Norm@50keV : 7.71705E-04 ( -0.000759822 0.0665682 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.29 using 59 PHA bins.
# Reduced chi-squared = 1.514 for 55 degrees of freedom
# Null hypothesis probability = 8.225537e-03
Photon flux (15-150 keV) in 0.448 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] : 200.000 (-200 -200)
R^2/D10^2 : 7.09989E-05 (-7.1171e-05 -7.1171e-05)
(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 4.481e-10 7.457e-10
25- 50 7.394e-10 1.483e-09
50-150 1.737e-10 4.386e-10
15-150 1.361e-09 1.486e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
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
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 7.02111E-05 (-7.05556e-05 -7.05556e-05)
kT2 [keV] : 5.77349 (-5.7835 -5.7835)
R2^2/D10^2 : 0.204066 (-0.203225 -0.203225)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.683e-10 4.079e-11
25- 50 5.363e-10 2.623e-10
50-150 8.840e-09 5.430e-09
15-150 9.645e-09 8.528e-09
Plot creation:
Sun Jul 9 13:28:49 EDT 2023