batgrbproduct analysis for trigger=1209401
batgrbproduct Analysis for Trigger=1209401
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 Jan 18 09:40:14 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1209401/GCN5_download_cron
======================================================================
Trigger: 01209401 Segment: 000
BAT Trigger Time: 727200600 [s; MET]
Trigger Stop: 727200664 [s; MET]
UTC: 2024-01-17T16:09:27.251840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.412284923332 Dec: 34.6757013714688 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.88
Flight Position: [ source = BAT ]
RA: 299.412284923332 Dec: 34.6757013714688 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.399189204516 Dec: 34.6638294831381 [deg; J2000]
{ 19h 57m 35.8s , +34d 39' 49.8" }
+/- 1.81586228912408 [arcmin] (estimated 90% radius based on SNR)
+/- 0.669713612187376 [arcmin] (formal 1-sigma fit error)
SNR: 12.9717908522176
Angular difference between Flight and Ground position is 0.961771 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.630368 0.552026 0.200188 0.055944
0.049050 0.049625 0.041674 0.036241 [error]
Peak 0.630368 0.552026 0.200188 0.055944
0.049050 0.049625 0.041674 0.036241 [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 1.79e-07 2.13e-07 1.83e-07 2.69e-07 6.70e-07 8.44e-07 erg/cm2
Error 2.31e-08 2.24e-08 3.69e-08 1.03e-07 8.43e-08 1.50e-07 erg/cm2
Peak flux Power-law 9.15e-02 6.05e-02 2.60e-02 1.54e-02 1.86e-01 1.93e-01 ph/cm2/s
Error 1.21e-02 6.21e-03 5.06e-03 5.52e-03 1.83e-02 1.93e-02 ph/cm2/s
Fluence Cutoff-PL 1.76e-07 2.26e-07 1.65e-07 8.27e-08 6.19e-07 6.49e-07 erg/cm2
Error 2.42e-08 3.26e-08 -------- 1.58e-07 1.16e-07 2.30e-07 erg/cm2
Peak flux Cutoff-PL 8.95e-02 6.42e-02 2.38e-02 5.85e-03 1.82e-01 1.83e-01 ph/cm2/s
Error 1.28e-02 9.17e-03 7.62e-03 1.01e-02 1.94e-02 2.31e-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 2.217 0.203 - - 1.11e-03 1.62e-04 42.530 57
CPL 1.670 0.959 21.4 0.0 2.48e-03 0.00e+00 41.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.217 0.203 - - 1.11e-03 1.62e-04 42.530 57
CPL 1.670 0.959 21.4 0.0 2.48e-03 0.00e+00 41.620 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.3992 +34.6638 0.0148 6.0 -58.1 1.4608 13.0 TRIG_01209401
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21700 ( -0.196205 0.208946 )
Norm@50keV : 1.11083E-03 ( -0.000163688 0.000161136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.53 using 59 PHA bins.
# Reduced chi-squared = 0.7461 for 57 degrees of freedom
# Null hypothesis probability = 9.232175e-01
Photon flux (15-150 keV) in 64 sec: 0.185560 ( -0.0182837 0.0182838 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70067e-07 ( -8.29651e-08 8.55507e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67039 ( -1.44086 0.476375 )
Epeak [keV] : 21.3815 ( )
Norm@50keV : 2.48463E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.62 using 59 PHA bins.
# Reduced chi-squared = 0.7432 for 56 degrees of freedom
# Null hypothesis probability = 9.238960e-01
Photon flux (15-150 keV) in 64 sec: 0.181803 ( -0.019446 0.019413 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.19168e-07 ( -1.10923e-07 1.20602e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.75988 ( -5.45368 -3.75988 )
beta : -2.50168 ( -0.483329 0.304265 )
Epeak [keV] : 22.9017 ( -4.73441 8.4958 )
Norm@50keV : 43.9738 ( -43.9743 397.771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.73 using 59 PHA bins.
# Reduced chi-squared = 0.6859 for 55 degrees of freedom
# Null hypothesis probability = 9.636471e-01
Photon flux (15-150 keV) in 64 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] : 7.57582 (-0.775522 0.875636)
R^2/D10^2 : 0.253828 (-0.0913053 0.141443)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.01 using 59 PHA bins.
# Reduced chi-squared = 0.8948 for 57 degrees of freedom
# Null hypothesis probability = 6.982256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.614e-07 2.538e-08
25- 50 2.564e-07 3.446e-08
50-150 5.610e-08 2.065e-08
15-150 4.740e-07 5.741e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.7329 (-10.0675 15.5296)
Norm : 1.16651 (-0.214805 0.274892)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.738e-07 2.320e-08
25- 50 2.328e-07 2.970e-08
50-150 1.886e-07 6.298e-08
15-150 5.952e-07 8.323e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53160 (-0.978874 0.971047)
R1^2/D10^2 : 0.419967 (-0.17338 0.346443)
kT2 [keV] : 38.5320 (-19.4743 -38.535)
R2^2/D10^2 : 3.38559E-04 (-0.000320472 0.00309169)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.747e-07 3.866e-08
25- 50 2.321e-07 5.974e-08
50-150 2.883e-07 1.564e-07
15-150 6.951e-07 2.177e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21700 ( -0.196205 0.208946 )
Norm@50keV : 1.11083E-03 ( -0.000163688 0.000161136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.53 using 59 PHA bins.
# Reduced chi-squared = 0.7461 for 57 degrees of freedom
# Null hypothesis probability = 9.232175e-01
Photon flux (15-150 keV) in 64 sec: 0.185560 ( -0.0182837 0.0182838 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70067e-07 ( -8.29651e-08 8.55507e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67039 ( -1.44086 0.476375 )
Epeak [keV] : 21.3815 ( )
Norm@50keV : 2.48463E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.62 using 59 PHA bins.
# Reduced chi-squared = 0.7432 for 56 degrees of freedom
# Null hypothesis probability = 9.238960e-01
Photon flux (15-150 keV) in 64 sec: 0.181803 ( -0.019446 0.019413 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.19168e-07 ( -1.10923e-07 1.20602e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.75988 ( -5.45382 -3.75988 )
beta : -2.50168 ( -0.483329 0.304265 )
Epeak [keV] : 22.9017 ( -4.73441 8.49219 )
Norm@50keV : 43.9738 ( -43.9743 235.671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.73 using 59 PHA bins.
# Reduced chi-squared = 0.6859 for 55 degrees of freedom
# Null hypothesis probability = 9.636471e-01
Photon flux (15-150 keV) in 64 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] : 7.57582 (-0.775522 0.875636)
R^2/D10^2 : 0.253828 (-0.0913053 0.141443)
(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 1.614e-07 2.557e-08
25- 50 2.564e-07 3.789e-08
50-150 5.610e-08 2.039e-08
15-150 4.740e-07 6.339e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.7329 (-10.0675 15.5296)
Norm : 1.16651 (-0.214805 0.274892)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.738e-07 2.042e-08
25- 50 2.328e-07 2.880e-08
50-150 1.886e-07 5.648e-08
15-150 5.952e-07 8.848e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53160 (-0.978874 0.971047)
R1^2/D10^2 : 0.419967 (-0.17338 0.346443)
kT2 [keV] : 38.5320 (-19.4743 -38.535)
R2^2/D10^2 : 3.38559E-04 (-0.000320472 0.00309169)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.747e-07 4.106e-08
25- 50 2.321e-07 5.507e-08
50-150 2.883e-07 1.715e-07
15-150 6.951e-07 2.318e-07
Plot creation:
Thu Jan 18 09:42:05 EST 2024