batgrbproduct analysis for trigger=1205107
batgrbproduct Analysis for Trigger=1205107
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): Fri Dec 29 10:13:15 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1205107/GCN5_download_cron
======================================================================
Trigger: 01205107 Segment: 000
BAT Trigger Time: 725445424 [s; MET]
Trigger Stop: 725445528 [s; MET]
UTC: 2023-12-28T08:36:31.372320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 300.460982746026 Dec: 35.3340881333985 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.37
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.37
Flight Position: [ source = BAT ]
RA: 300.460982746026 Dec: 35.3340881333985 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.454955551499 Dec: 35.3333444081552 [deg; J2000]
{ 20h 01m 49.2s , +35d 20' 00.0" }
+/- 1.63085094591772 [arcmin] (estimated 90% radius based on SNR)
+/- 0.562464064741035 [arcmin] (formal 1-sigma fit error)
SNR: 15.1240959189814
Angular difference between Flight and Ground position is 0.298374 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 453.535999894142 +/- 176.389778189224
Measured from: -18.8639998435974
to: 434.672000050545 [s; relative to TRIGTIME]
T50: 284.051999926567 +/- 68.4326362646217
Measured from: 35.9160001277924
to: 319.968000054359 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 111.299999952316
to: 112.299999952316 [s; relative to TRIGTIME]
Total Fluence
Measured from: -82.8040000200272
to: 725.955999970436 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.483141 6.605699 2.901170 0.384329
0.176058 0.177323 0.147941 0.124507 [error]
Peak 0.018869 0.021843 0.011909 0.015129
0.006008 0.006016 0.005294 0.004439 [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 2.24e-06 2.64e-06 2.24e-06 3.22e-06 8.27e-06 1.03e-05 erg/cm2
Error 1.38e-07 9.62e-08 1.45e-07 4.36e-07 3.23e-07 5.67e-07 erg/cm2
Peak flux Power-law 1.64e-01 1.49e-01 9.30e-02 8.88e-02 4.43e-01 4.95e-01 ph/cm2/s
Error 7.64e-02 4.51e-02 4.22e-02 8.34e-02 1.33e-01 1.55e-01 ph/cm2/s
Fluence Cutoff-PL 2.18e-06 2.68e-06 2.22e-06 2.32e-06 8.10e-06 9.41e-06 erg/cm2
Error 1.62e-07 1.18e-07 1.54e-07 1.09e-06 4.27e-07 1.16e-06 erg/cm2
Peak flux Cutoff-PL 1.67e-01 1.49e-01 9.16e-02 8.52e-02 4.43e-01 4.94e-01 ph/cm2/s
Error 7.70e-02 4.48e-02 4.20e-02 9.75e-02 1.33e-01 1.62e-01 ph/cm2/s
Fluence Band 2.09e-06 2.69e-06 2.19e-06 2.96e-06 8.08e-06 9.96e-06 erg/cm2
Error 1.88e-07 -------- 1.56e-07 -------- 2.78e-07 -------- 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 2.237 0.080 - - 1.09e-03 4.93e-05 53.910 57
CPL 1.993 -0.852 1.2 0.5 1.48e-03 1.22e-04 52.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.677 0.583 - - 3.36e-03 1.17e-03 51.750 57
CPL 2.311 2.054 112.0 0.0 1.57e-03 0.00e+00 51.660 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 808.760 -82.804 725.956
T90 453.536 -18.864 434.672
T50 284.052 35.916 319.968
Peak 1.000 111.300 112.300
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.4550 +35.3333 0.0127 4.7 -40.7 3.0479 15.1 TRIG_01205107
------------------------------------------
Foreground time interval of the image:
-12.899 111.201 (delta_t = 124.100 [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
Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23652 ( -0.07959 0.0809803 )
Norm@50keV : 1.09096E-03 ( -4.95126e-05 4.90737e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.91 using 59 PHA bins.
# Reduced chi-squared = 0.9457 for 57 degrees of freedom
# Null hypothesis probability = 5.918703e-01
Photon flux (15-150 keV) in 801.8 sec: 0.184152 ( -0.00733294 0.00736777 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26912e-06 ( -3.22353e-07 3.2384e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99315 ( -0.289767 -1.99315 )
Epeak [keV] : 1.23659 ( -0.326735 0.628796 )
Norm@50keV : 1.47904E-03 ( -0.000119794 0.000123355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9462 for 56 degrees of freedom
# Null hypothesis probability = 5.897215e-01
Photon flux (15-150 keV) in 801.8 sec: 0.181484 ( -0.008492 0.008469 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.10131e-06 ( -4.26437e-07 4.2784e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13998 ( )
beta : -8.12642 ( )
Epeak [keV] : 64.7600 ( )
Norm@50keV : 2.48026E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.25 using 59 PHA bins.
# Reduced chi-squared = 2.7682 for 55 degrees of freedom
# Null hypothesis probability = 4.590304e-11
Photon flux (15-150 keV) in 801.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.07509e-06 ( -8.06948e-06 -1.87292e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.65082 ( )
R^2/D10^2 : 8.69598E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 201.34 using 59 PHA bins.
# Reduced chi-squared = 3.5323 for 57 degrees of freedom
# Null hypothesis probability = 5.451309e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.305e-06 8.419e-08
25- 50 3.084e-06 1.115e-07
50-150 1.451e-06 1.475e-07
15-150 5.840e-06 2.197e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.1272 (-5.32381 6.64549)
Norm : 0.984060 (-0.070271 0.0834704)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.939e-06 1.211e-07
25- 50 2.807e-06 1.106e-07
50-150 2.783e-06 2.682e-07
15-150 7.528e-06 3.115e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.62298 (-0.716155 0.782521)
R1^2/D10^2 : 0.583093 (-0.224789 0.423737)
kT2 [keV] : 18.7463 (-2.81005 4.24511)
R2^2/D10^2 : 4.32527E-03 (-0.00240411 0.00427475)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.019e-06 2.454e-07
25- 50 2.681e-06 2.622e-07
50-150 3.060e-06 5.637e-07
15-150 7.761e-06 9.397e-07
Peak spectrum fit
Power-law model
Time interval is from 111.300 sec. to 112.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67734 ( -0.558363 0.606733 )
Norm@50keV : 3.36312E-03 ( -0.00121349 0.00113645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.75 using 59 PHA bins.
# Reduced chi-squared = 0.9078 for 57 degrees of freedom
# Null hypothesis probability = 6.719009e-01
Photon flux (15-150 keV) in 1 sec: 0.443182 ( -0.133403 0.133435 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11975e-08 ( -1.1225e-08 1.18662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 111.300 sec. to 112.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.31052 ( -4.0043 0.103347 )
Epeak [keV] : 112.039 ( )
Norm@50keV : 1.57205E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.66 using 59 PHA bins.
# Reduced chi-squared = 0.9225 for 56 degrees of freedom
# Null hypothesis probability = 6.396811e-01
Photon flux (15-150 keV) in 1 sec: 0.443276 ( -0.133286 0.133236 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12296e-08 ( -1.23235e-08 1.15951e-08 ) ergs/cm2
Band function
Time interval is from 111.300 sec. to 112.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.84349 ( -4.84349 -4.84349 )
beta : -1.80816 ( -1.18499 0.639078 )
Epeak [keV] : 23.8161 ( -23.8161 12.8747 )
Norm@50keV : 441.259 ( -132.135 4.40163e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9368 for 55 degrees of freedom
# Null hypothesis probability = 6.082842e-01
Photon flux (15-150 keV) in 1 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] : 10.5419 (-3.19113 4.93507)
R^2/D10^2 : 0.172542 (-0.172437 0.481574)
(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 3.967e-09 2.545e-09
25- 50 1.061e-08 6.295e-09
50-150 6.438e-09 5.040e-09
15-150 2.101e-08 1.394e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 131.756 (-92.8993 -132.019)
Norm : 1.85947 (-0.601809 1.09089)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.821e-09 2.868e-09
25- 50 8.760e-09 5.225e-09
50-150 1.634e-08 1.134e-08
15-150 2.992e-08 1.939e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.58542 (-3.49728 3.57646)
R1^2/D10^2 : 0.328039 (-0.248582 1.68837)
kT2 [keV] : 198.080 (-198.188 -198.188)
R2^2/D10^2 : 6.18005E-05 (-4.5875e-05 0.0238603)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.663e-09 2.848e-09
25- 50 9.705e-09 5.760e-09
50-150 1.920e-08 4.131e-09
15-150 3.357e-08 1.262e-08
Plot creation:
Fri Dec 29 10:16:09 EST 2023