batgrbproduct analysis for trigger=1201696
batgrbproduct Analysis for Trigger=1201696
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): Mon Dec 11 19:45:20 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1201696/GCN5_download_cron
======================================================================
Trigger: 01201696 Segment: 000
BAT Trigger Time: 723936577.024 [s; MET]
Trigger Stop: 723936579.072 [s; MET]
UTC: 2023-12-10T21:29:04.499760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 95.7721784977718 Dec: -48.3592989761389 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.31
Image Trigger?: NO
Rate S/N Ratio: 14.5258390463339 [ if not an image trigger ]
Image S/N Ratio: 7.31
Flight Position: [ source = BAT ]
RA: 95.7721784977718 Dec: -48.3592989761389 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 95.8028039923779 Dec: -48.3345978186657 [deg; J2000]
{ 06h 23m 12.7s , -48d 20' 04.6" }
+/- 1.76147305536333 [arcmin] (estimated 90% radius based on SNR)
+/- 0.831494622772727 [arcmin] (formal 1-sigma fit error)
SNR: 13.5477428671451
Angular difference between Flight and Ground position is 1.920416 arcmin
Partial Coding Fraction: 0.1757812 [ including projection effects ]
Duration
T90: 7.47200012207031 +/- 0.647950639186933
Measured from: 0.00800001621246338
to: 7.48000013828278 [s; relative to TRIGTIME]
T50: 4.04800009727478 +/- 0.892134608046634
Measured from: 0.79200005531311
to: 4.84000015258789 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.236000061035156
to: 0.763999938964844 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.23199999332428
to: 7.81599998474121 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.355580 0.603113 0.722922 0.239517
0.064664 0.074479 0.070074 0.065387 [error]
Peak 0.098941 0.176911 0.149305 0.059489
0.024757 0.028748 0.026419 0.023510 [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 1.18e-07 2.80e-07 5.31e-07 2.44e-06 1.44e-06 3.37e-06 erg/cm2
Error 2.60e-08 3.79e-08 6.61e-08 6.73e-07 1.73e-07 7.09e-07 erg/cm2
Peak flux Power-law 1.08e+00 1.24e+00 1.02e+00 1.40e+00 3.85e+00 4.74e+00 ph/cm2/s
Error 3.38e-01 2.49e-01 2.06e-01 5.61e-01 7.05e-01 8.66e-01 ph/cm2/s
Fluence Cutoff-PL 9.16e-08 3.02e-07 5.89e-07 7.79e-07 1.37e-06 1.76e-06 erg/cm2
Error 3.23e-08 4.53e-08 8.31e-08 7.65e-07 1.87e-07 7.68e-07 erg/cm2
Peak flux Cutoff-PL 8.09e-01 1.55e+00 1.10e+00 2.06e-01 3.64e+00 3.67e+00 ph/cm2/s
Error 4.14e-01 3.87e-01 2.84e-01 5.60e-01 7.43e-01 8.67e-01 ph/cm2/s
Fluence Band 8.79e-08 3.05e-07 5.78e-07 1.32e-06 1.37e-06 2.30e-06 erg/cm2
Error 3.40e-08 4.90e-08 -------- -------- 1.85e-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 1.080 0.187 - - 1.70e-02 1.93e-03 51.640 57
CPL 0.020 0.976 105.2 107.9 5.11e-02 6.41e-02 47.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.285 0.278 - - 3.24e-02 5.75e-03 62.720 57
CPL -0.811 2.411 62.2 86.0 4.25e-01 6.80e+00 59.180 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: 5.248000 sec.
T50 in the 50-300 keV band: 3.072000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.048 -0.232 7.816
T90 7.472 0.008 7.480
T50 4.048 0.792 4.840
Peak 1.000 -0.236 0.764
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
95.8028 -48.3346 0.0142 40.4 130.9 2.2119 13.5 TRIG_01201696
------------------------------------------
Foreground time interval of the image:
-0.232 7.816 (delta_t = 8.048 [sec])
Background time interval of the image:
-60.024 -0.232 (delta_t = 59.792 [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 -0.232 sec. to 7.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07955 ( -0.190318 0.184571 )
Norm@50keV : 1.69780E-02 ( -0.00193367 0.0019289 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9060 for 57 degrees of freedom
# Null hypothesis probability = 6.756400e-01
Photon flux (15-150 keV) in 8.048 sec: 1.96559 ( -0.230216 0.231075 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43806e-06 ( -1.72648e-07 1.73496e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 7.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97938E-02 ( -1.09296 0.858901 )
Epeak [keV] : 105.166 ( -27.6087 188.094 )
Norm@50keV : 5.11367E-02 ( -0.0297901 0.0985026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.04 using 59 PHA bins.
# Reduced chi-squared = 0.8399 for 56 degrees of freedom
# Null hypothesis probability = 7.975531e-01
Photon flux (15-150 keV) in 8.048 sec: 1.88840 ( -0.24074 0.24017 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36882e-06 ( -1.86923e-07 1.86199e-07 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 7.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.95775E-02 ( -0.821548 0.707979 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 105.144 ( -19.8939 187.722 )
Norm@50keV : 5.11506E-02 ( -0.00568661 0.0517792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.04 using 59 PHA bins.
# Reduced chi-squared = 0.8552 for 55 degrees of freedom
# Null hypothesis probability = 7.687971e-01
Photon flux (15-150 keV) in 8.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36864e-06 ( -1.36859e-06 -1.86215e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.2121 (-2.48198 3.03385)
R^2/D10^2 : 9.33162E-02 (-0.0344994 0.0508515)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.35 using 59 PHA bins.
# Reduced chi-squared = 0.9009 for 57 degrees of freedom
# Null hypothesis probability = 6.860323e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.890e-08 1.295e-08
25- 50 2.954e-07 5.288e-08
50-150 8.959e-07 1.620e-07
15-150 1.250e-06 2.028e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-25.4068 -200)
Norm : 8.17322 (-0.954209 0.954209)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.637e-07 9.098e-08
25- 50 3.150e-07 1.724e-07
50-150 6.908e-07 3.808e-07
15-150 1.170e-06 6.406e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.60347 (-5.8342 -8.12823)
R1^2/D10^2 : 0.385811 (-0.324084 100.55)
kT2 [keV] : 26.9411 (-25.1561 -26.9413)
R2^2/D10^2 : 2.98995E-02 (-0.0296889 0.0779115)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.083e-08 5.300e-08
25- 50 2.991e-07 1.534e-07
50-150 9.631e-07 5.396e-07
15-150 1.353e-06 6.986e-07
Peak spectrum fit
Power-law model
Time interval is from -0.236 sec. to 0.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28493 ( -0.282307 0.274013 )
Norm@50keV : 3.23531E-02 ( -0.0057533 0.00575264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.72 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.808153e-01
Photon flux (15-150 keV) in 1 sec: 3.84934 ( -0.704078 0.706126 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.20894e-07 ( -6.12952e-08 6.18774e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.236 sec. to 0.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.810977 ( -2.89785 1.92422 )
Epeak [keV] : 62.2449 ( -13.5574 158.373 )
Norm@50keV : 0.425033 ( -0.440008 13.1635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 56 degrees of freedom
# Null hypothesis probability = 3.602959e-01
Photon flux (15-150 keV) in 1 sec: 3.63993 ( -0.7409 0.7458 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.70416e-07 ( -6.606e-08 7.9237e-08 ) ergs/cm2
Band function
Time interval is from -0.236 sec. to 0.764 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.38513 ( -4.33743 -4.41782 )
beta : -1.95181 ( -0.66269 0.487224 )
Epeak [keV] : 43.1683 ( -13.983 28.3471 )
Norm@50keV : 19.3847 ( -18.1548 100.088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.252233e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0075e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.8584 (-2.34816 3.00412)
R^2/D10^2 : 0.510266 (-0.247225 0.423655)
(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 2.362e-08 7.995e-09
25- 50 9.303e-08 2.239e-08
50-150 1.392e-07 4.696e-08
15-150 2.558e-07 7.080e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-71.109 -200)
Norm : 16.1483 (-2.89154 2.89154)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.023e-08 2.344e-08
25- 50 7.738e-08 4.472e-08
50-150 1.697e-07 9.625e-08
15-150 2.873e-07 1.655e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3528 (-2.32414 2.96764)
R1^2/D10^2 : 0.836463 (-0.405036 0.735522)
kT2 [keV] : 199.363 (-158.99 -199.363)
R2^2/D10^2 : 3.43431E-04 (-0.000266663 0.00867649)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.749e-08 1.618e-08
25- 50 9.176e-08 5.313e-08
50-150 1.732e-07 6.825e-08
15-150 2.925e-07 1.288e-07
Plot creation:
Mon Dec 11 19:48:11 EST 2023