batgrbproduct analysis for trigger=1188089
batgrbproduct Analysis for Trigger=1188089
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): Wed Aug 30 02:19:12 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1188089/GCN5_download_cron
======================================================================
Trigger: 01188089 Segment: 000
BAT Trigger Time: 714982400 [s; MET]
Trigger Stop: 714982472 [s; MET]
UTC: 2023-08-29T06:12:48.088500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.7172234488687 Dec: 21.8245086865911 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.53
Flight Position: [ source = BAT ]
RA: 83.7172234488687 Dec: 21.8245086865911 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.718273524583 Dec: 21.8406715079402 [deg; J2000]
{ 05h 34m 52.4s , +21d 50' 26.4" }
+/- 1.37917605840629 [arcmin] (estimated 90% radius based on SNR)
+/- 0.634814575441141 [arcmin] (formal 1-sigma fit error)
SNR: 19.2159408028184
Angular difference between Flight and Ground position is 0.971531 arcmin
Partial Coding Fraction: 1.03125 [ 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 1.144242 1.011960 0.478123 0.069870
0.053543 0.055223 0.049119 0.047640 [error]
Peak 1.144242 1.011960 0.478123 0.069870
0.053543 0.055223 0.049119 0.047640 [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 3.22e-07 4.09e-07 3.79e-07 6.16e-07 1.32e-06 1.73e-06 erg/cm2
Error 3.15e-08 2.65e-08 4.68e-08 1.54e-07 1.03e-07 2.01e-07 erg/cm2
Peak flux Power-law 1.46e-01 1.03e-01 4.76e-02 3.09e-02 3.11e-01 3.27e-01 ph/cm2/s
Error 1.46e-02 6.60e-03 5.66e-03 7.16e-03 2.02e-02 2.10e-02 ph/cm2/s
Fluence Cutoff-PL 3.18e-07 4.13e-07 3.76e-07 4.95e-07 1.30e-06 1.60e-06 erg/cm2
Error 2.68e-08 3.25e-08 4.99e-08 2.56e-07 1.24e-07 3.35e-07 erg/cm2
Peak flux Cutoff-PL 1.44e-01 1.04e-01 4.74e-02 2.60e-02 3.09e-01 3.21e-01 ph/cm2/s
Error 1.66e-02 7.98e-03 5.88e-03 1.33e-02 2.21e-02 2.73e-02 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 2.109 0.139 - - 1.97e-03 1.70e-04 58.440 57
CPL 1.993 0.000 2.6 0.0 2.30e-03 0.00e+00 58.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.109 0.139 - - 1.97e-03 1.70e-04 58.440 57
CPL 1.993 0.000 2.6 0.0 2.30e-03 0.00e+00 58.320 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
83.7183 +21.8407 0.0100 10.9 -170.5 2.7508 19.2 TRIG_01188089
------------------------------------------
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: 2.10888 ( -0.13681 0.141879 )
Norm@50keV : 1.96871E-03 ( -0.000171853 0.000168959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.223627e-01
Photon flux (15-150 keV) in 72 sec: 0.311092 ( -0.0202208 0.0202508 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.31813e-06 ( -1.01637e-07 1.0347e-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: 1.99263 ( )
Epeak [keV] : 2.62044 ( )
Norm@50keV : 2.29678E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 56 degrees of freedom
# Null hypothesis probability = 3.901463e-01
Photon flux (15-150 keV) in 72 sec: 0.308986 ( -0.02248 0.021754 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30058e-06 ( -1.31026e-07 1.17713e-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 : -1.91366 ( 1.91376 1.91376 )
beta : -2.24493 ( 2.24507 0.268586 )
Epeak [keV] : 18.0594 ( -17.3897 45.4268 )
Norm@50keV : 2.54826E-03 ( -0.000525397 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 3.562214e-01
Photon flux (15-150 keV) in 72 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] : 9.64523 (-0.772282 0.835923)
R^2/D10^2 : 0.155167 (-0.0429887 0.0600063)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.88 using 59 PHA bins.
# Reduced chi-squared = 1.9452 for 57 degrees of freedom
# Null hypothesis probability = 2.534228e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.089e-07 2.286e-08
25- 50 4.930e-07 3.614e-08
50-150 2.315e-07 4.475e-08
15-150 9.334e-07 7.380e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.5075 (-11.028 15.0335)
Norm : 1.62259 (-0.192086 0.210358)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.915e-07 2.639e-08
25- 50 4.378e-07 3.125e-08
50-150 4.807e-07 8.226e-08
15-150 1.210e-06 1.102e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.09447 (-0.889103 1.16586)
R1^2/D10^2 : 3.35565 (-2.18858 7.80345)
kT2 [keV] : 14.7826 (-2.25664 3.63441)
R2^2/D10^2 : 2.38598E-02 (-0.0143455 0.0239382)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.245e-07 1.283e-07
25- 50 4.036e-07 1.007e-07
50-150 4.575e-07 1.299e-07
15-150 1.186e-06 2.807e-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: 2.10888 ( -0.13681 0.141879 )
Norm@50keV : 1.96871E-03 ( -0.000171853 0.000168959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.223627e-01
Photon flux (15-150 keV) in 72 sec: 0.311092 ( -0.0202208 0.0202508 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.31813e-06 ( -1.01637e-07 1.0347e-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: 1.99263 ( )
Epeak [keV] : 2.62044 ( )
Norm@50keV : 2.29678E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 56 degrees of freedom
# Null hypothesis probability = 3.901463e-01
Photon flux (15-150 keV) in 72 sec: 0.308986 ( -0.02248 0.021754 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30058e-06 ( -1.31026e-07 1.17713e-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 : -1.91366 ( 1.91376 1.91376 )
beta : -2.24493 ( 2.24507 0.268586 )
Epeak [keV] : 18.0594 ( -17.3897 45.4268 )
Norm@50keV : 2.54826E-03 ( -0.000525393 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 3.562214e-01
Photon flux (15-150 keV) in 72 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] : 9.64523 (-0.772282 0.835923)
R^2/D10^2 : 0.155167 (-0.0429887 0.0600063)
(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 2.089e-07 2.534e-08
25- 50 4.930e-07 3.715e-08
50-150 2.315e-07 4.396e-08
15-150 9.334e-07 7.272e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.5075 (-11.028 15.0335)
Norm : 1.62259 (-0.192086 0.210358)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.915e-07 2.830e-08
25- 50 4.378e-07 3.132e-08
50-150 4.807e-07 8.640e-08
15-150 1.210e-06 1.001e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.09447 (-0.889103 1.16586)
R1^2/D10^2 : 3.35565 (-2.18858 7.80345)
kT2 [keV] : 14.7826 (-2.25664 3.63441)
R2^2/D10^2 : 2.38598E-02 (-0.0143455 0.0239382)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.245e-07 1.285e-07
25- 50 4.036e-07 8.258e-08
50-150 4.575e-07 1.246e-07
15-150 1.186e-06 2.794e-07
Plot creation:
Wed Aug 30 02:21:24 EDT 2023