batgrbproduct analysis for trigger=1242223
batgrbproduct Analysis for Trigger=1242223
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 14 14:40:22 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1242223/GCN5_download_cron
======================================================================
Trigger: 01242223 Segment: 000
BAT Trigger Time: 742447666.624 [s; MET]
Trigger Stop: 742447674.816 [s; MET]
UTC: 2024-07-12T03:27:12.831520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 122.368929948927 Dec: -37.0767268156002 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.11
Image Trigger?: NO
Rate S/N Ratio: 12.6095202129185 [ if not an image trigger ]
Image S/N Ratio: 7.11
Flight Position: [ source = BAT ]
RA: 122.368929948927 Dec: -37.0767268156002 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 122.384514269066 Dec: -37.0934094989021 [deg; J2000]
{ 08h 09m 32.3s , -37d 05' 36.3" }
+/- 2.66760757965939 [arcmin] (estimated 90% radius based on SNR)
+/- 1.51069612487094 [arcmin] (formal 1-sigma fit error)
SNR: 7.48811917203463
Angular difference between Flight and Ground position is 1.248336 arcmin
Partial Coding Fraction: 0.9375 [ including projection effects ]
Duration
T90: 16.4520000219345 +/- 4.8915769241868
Measured from: -4.2519998550415
to: 12.200000166893 [s; relative to TRIGTIME]
T50: 6.93599998950958 +/- 3.88233015960244
Measured from: 0.932000160217285
to: 7.86800014972687 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.24000000953674
to: 2.24000000953674 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.67999994754791
to: 12.5920000076294 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.081815 0.146160 0.140041 0.022127
0.024952 0.025926 0.022538 0.019573 [error]
Peak 0.010876 0.023295 0.025280 0.002632
0.006066 0.006478 0.005614 0.004746 [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 2.89e-08 6.06e-08 9.94e-08 3.68e-07 2.74e-07 5.57e-07 erg/cm2
Error 9.05e-09 1.17e-08 2.13e-08 1.73e-07 5.37e-08 1.88e-07 erg/cm2
Peak flux Power-law 1.38e-01 1.57e-01 1.28e-01 1.73e-01 4.86e-01 5.96e-01 ph/cm2/s
Error 7.11e-02 5.15e-02 4.36e-02 1.22e-01 1.45e-01 1.80e-01 ph/cm2/s
Fluence Cutoff-PL 2.49e-08 6.50e-08 1.06e-07 1.40e-07 2.61e-07 3.35e-07 erg/cm2
Error 1.08e-08 1.41e-08 2.46e-08 1.71e-07 5.72e-08 2.12e-07 erg/cm2
Peak flux Cutoff-PL 9.94e-02 1.70e-01 1.47e-01 6.33e-02 4.61e-01 4.79e-01 ph/cm2/s
Error 8.77e-02 6.30e-02 5.58e-02 1.40e-01 1.53e-01 1.73e-01 ph/cm2/s
Fluence Band 2.48e-08 6.41e-08 1.06e-07 1.57e-07 2.64e-07 3.54e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.06e-01 1.68e-01 1.45e-01 7.39e-02 4.67e-01 4.92e-01 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 1.285 0.298 - - 1.60e-03 2.83e-04 52.510 57
CPL 0.516 1.237 101.1 0.0 3.78e-03 0.00e+00 51.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.299 0.492 - - 4.08e-03 1.19e-03 65.220 57
CPL -0.056 2.695 83.8 -13.0 1.71e-02 2.54e-01 64.120 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 17.272 -4.680 12.592
T90 16.452 -4.252 12.200
T50 6.936 0.932 7.868
Peak 1.000 1.240 2.240
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
122.3845 -37.0934 0.0257 21.4 -3.1 0.3762 7.5 TRIG_01242223
------------------------------------------
Foreground time interval of the image:
-4.680 12.592 (delta_t = 17.272 [sec])
Background time interval of the image:
-239.624 -237.214 (delta_t = 2.410 [sec])
-229.624 -79.904 (delta_t = 149.720 [sec])
-76.624 -4.680 (delta_t = 71.944 [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 -4.680 sec. to 12.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28542 ( -0.300701 0.295605 )
Norm@50keV : 1.60240E-03 ( -0.000283322 0.000282578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9212 for 57 degrees of freedom
# Null hypothesis probability = 6.440947e-01
Photon flux (15-150 keV) in 17.27 sec: 0.190667 ( -0.0343117 0.0344095 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7445e-07 ( -5.33189e-08 5.41195e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.680 sec. to 12.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.515721 ( -1.50876 0.965341 )
Epeak [keV] : 101.146 ( )
Norm@50keV : 3.78102E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.21 using 59 PHA bins.
# Reduced chi-squared = 0.9144 for 56 degrees of freedom
# Null hypothesis probability = 6.565826e-01
Photon flux (15-150 keV) in 17.27 sec: 0.184758 ( -0.035685 0.035584 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61323e-07 ( -5.66715e-08 5.78096e-08 ) ergs/cm2
Band function
Time interval is from -4.680 sec. to 12.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.517256 ( -0.546025 1.12717 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 101.241 ( -33.9573 -101.241 )
Norm@50keV : 3.77437E-03 ( -0.00236827 0.0147481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.21 using 59 PHA bins.
# Reduced chi-squared = 0.9310 for 55 degrees of freedom
# Null hypothesis probability = 6.203785e-01
Photon flux (15-150 keV) in 17.27 sec: 0.186842 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.64119e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.8029 (-3.51715 4.62476)
R^2/D10^2 : 1.28283E-02 (-0.00693672 0.0142495)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 57 degrees of freedom
# Null hypothesis probability = 5.403793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.411e-08 5.722e-09
25- 50 6.471e-08 2.533e-08
50-150 1.484e-07 5.154e-08
15-150 2.272e-07 6.616e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-71.6838 -200)
Norm : 0.791232 (-0.140407 0.140407)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.403e-08 1.984e-08
25- 50 6.546e-08 3.752e-08
50-150 1.436e-07 8.095e-08
15-150 2.430e-07 1.420e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.32396 (-3.72428 7.5713)
R1^2/D10^2 : 0.193483 (-0.174922 8.04623)
kT2 [keV] : 23.5036 (-6.61425 35.1803)
R2^2/D10^2 : 4.37291E-03 (-0.00419207 0.0101856)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.656e-08 1.559e-08
25- 50 6.236e-08 3.159e-08
50-150 1.717e-07 1.040e-07
15-150 2.607e-07 1.362e-07
Peak spectrum fit
Power-law model
Time interval is from 1.240 sec. to 2.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29877 ( -0.494032 0.490915 )
Norm@50keV : 4.07730E-03 ( -0.00119209 0.00119065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.22 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.125698e-01
Photon flux (15-150 keV) in 1 sec: 0.486326 ( -0.144993 0.145679 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03028e-08 ( -1.28012e-08 1.30499e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.240 sec. to 2.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.60345E-02 ( -3.66505 1.72423 )
Epeak [keV] : 83.8497 ( -57.8997 -83.8734 )
Norm@50keV : 1.70764E-02 ( -0.0170902 0.490569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.12 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 56 degrees of freedom
# Null hypothesis probability = 2.133143e-01
Photon flux (15-150 keV) in 1 sec: 0.460557 ( -0.154028 0.15249 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81389e-08 ( -1.28383e-08 1.35435e-08 ) ergs/cm2
Band function
Time interval is from 1.240 sec. to 2.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.11308E-02 ( -1.26498 3.32375 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 83.9409 ( -29.823 122.179 )
Norm@50keV : 1.69966E-02 ( -0.0169966 0.491542 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.12 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 55 degrees of freedom
# Null hypothesis probability = 1.872484e-01
Photon flux (15-150 keV) in 1 sec: 0.466939 ( ) 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] : 18.4860 (-5.002 7.45318)
R^2/D10^2 : 2.99318E-02 (-0.0299325 0.056913)
(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 2.030e-09 1.301e-09
25- 50 9.574e-09 5.872e-09
50-150 2.391e-08 1.463e-08
15-150 3.551e-08 2.199e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-111.194 -199.363)
Norm : 2.02531 (-0.594638 0.594653)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.043e-09 3.045e-09
25- 50 9.701e-09 5.900e-09
50-150 2.128e-08 1.281e-08
15-150 3.602e-08 2.180e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.28064 (-1.63781 5.07037)
R1^2/D10^2 : 1.45913E+04 (-14404.3 -14404.3)
kT2 [keV] : 19.4474 (-5.28905 8.26313)
R2^2/D10^2 : 2.46056E-02 (-0.0246011 0.0317095)
------------------------------------------------------------
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 Jul 14 14:43:55 EDT 2024