batgrbproduct analysis for trigger=1197311
batgrbproduct Analysis for Trigger=1197311
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 Nov 19 18:07:15 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1197311/GCN5_download_cron
======================================================================
Trigger: 01197311 Segment: 000
BAT Trigger Time: 722020625.6 [s; MET]
Trigger Stop: 722020626.624 [s; MET]
UTC: 2023-11-18T17:16:33.206740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 4.84300825958335 Dec: -48.0355229992106 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.93
Image Trigger?: NO
Rate S/N Ratio: 109.261155036911 [ if not an image trigger ]
Image S/N Ratio: 20.93
Flight Position: [ source = BAT ]
RA: 4.84300825958335 Dec: -48.0355229992106 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 4.84035276948835 Dec: -48.043753715045 [deg; J2000]
{ 00h 19m 21.7s , -48d 02' 37.5" }
+/- 0.786457923376863 [arcmin] (estimated 90% radius based on SNR)
+/- 0.288590950071839 [arcmin] (formal 1-sigma fit error)
SNR: 42.869990880153
Angular difference between Flight and Ground position is 0.505202 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 37.6320000886917 +/- 8.89487767030634
Measured from: -4.43999993801117
to: 33.1920001506805 [s; relative to TRIGTIME]
T50: 3.24800002574921 +/- 0.47946638299328
Measured from: -1.54399991035461
to: 1.70400011539459 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0839999914169312
to: 0.916000008583069 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.8400000333786
to: 55.2079999446869 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.280491 2.025960 1.744378 0.558642
0.067285 0.071738 0.064417 0.052643 [error]
Peak 0.231237 0.408340 0.420708 0.144091
0.014303 0.017814 0.017749 0.013159 [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 4.53e-07 8.82e-07 1.33e-06 4.37e-06 3.74e-06 7.04e-06 erg/cm2
Error 3.44e-08 3.96e-08 6.46e-08 4.75e-07 1.60e-07 5.13e-07 erg/cm2
Peak flux Power-law 2.45e+00 3.03e+00 2.73e+00 4.27e+00 9.68e+00 1.25e+01 ph/cm2/s
Error 2.19e-01 1.66e-01 1.43e-01 4.70e-01 4.60e-01 6.14e-01 ph/cm2/s
Fluence Cutoff-PL 4.31e-07 8.99e-07 1.36e-06 3.15e-06 3.69e-06 5.85e-06 erg/cm2
Error 4.25e-08 4.48e-08 7.26e-08 8.57e-07 1.74e-07 1.03e-06 erg/cm2
Peak flux Cutoff-PL 2.16e+00 3.14e+00 2.90e+00 2.60e+00 9.49e+00 1.08e+01 ph/cm2/s
Error 2.75e-01 1.86e-01 1.79e-01 8.05e-01 4.75e-01 9.30e-01 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 1.404 0.071 - - 6.25e-03 2.47e-04 62.700 57
CPL 1.172 0.276 191.2 -56.7 8.05e-03 2.43e-03 60.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.150 0.079 - - 8.30e-02 3.83e-03 53.600 57
CPL 0.633 0.343 147.6 94.9 1.44e-01 5.24e-02 46.130 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: 30.848000 sec.
T50 in the 50-300 keV band: 2.816000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 62.048 -6.840 55.208
T90 37.632 -4.440 33.192
T50 3.248 -1.544 1.704
Peak 1.000 -0.084 0.916
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
4.8404 -48.0438 0.0045 33.7 -134.2 4.9587 42.9 TRIG_01197311
------------------------------------------
Foreground time interval of the image:
-6.840 12.301 (delta_t = 19.141 [sec])
Background time interval of the image:
-60.600 -6.840 (delta_t = 53.760 [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 -6.840 sec. to 55.208 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40433 ( -0.0712966 0.0711627 )
Norm@50keV : 6.25019E-03 ( -0.000247156 0.000247125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.70 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.811789e-01
Photon flux (15-150 keV) in 62.05 sec: 0.761908 ( -0.0320593 0.0321277 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.74411e-06 ( -1.59503e-07 1.59879e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.840 sec. to 55.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17219 ( -0.294107 0.258086 )
Epeak [keV] : 191.168 ( -77.8627 -191.168 )
Norm@50keV : 8.05343E-03 ( -0.00190559 0.0029513 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.65 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.117791e-01
Photon flux (15-150 keV) in 62.05 sec: 0.752138 ( -0.033978 0.034017 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69029e-06 ( -1.74243e-07 1.73175e-07 ) ergs/cm2
Band function
Time interval is from -6.840 sec. to 55.208 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.312065 ( -0.901806 0.565852 )
beta : -1.49012 ( 1.48717 0.107671 )
Epeak [keV] : 52.9919 ( -27.6061 247.329 )
Norm@50keV : 2.97884E-02 ( -0.0307556 314.919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Null hypothesis probability = 3.336789e-01
Photon flux (15-150 keV) in 62.05 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] : 16.9425 ( )
R^2/D10^2 : 5.69973E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 188.27 using 59 PHA bins.
# Reduced chi-squared = 3.3031 for 57 degrees of freedom
# Null hypothesis probability = 6.081234e-16
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.069e-07 1.573e-08
25- 50 9.132e-07 4.561e-08
50-150 1.870e-06 1.443e-07
15-150 2.990e-06 1.443e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-10.2968 -200)
Norm : 3.17097 (-0.125737 0.125737)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.899e-07 2.110e-08
25- 50 9.425e-07 4.126e-08
50-150 2.067e-06 8.935e-08
15-150 3.499e-06 1.530e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.97385 (-1.24312 1.41603)
R1^2/D10^2 : 0.474155 (-0.184614 0.347071)
kT2 [keV] : 30.0403 (-4.57683 7.96099)
R2^2/D10^2 : 6.40489E-03 (-0.00350332 0.00521778)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.935e-07 5.938e-08
25- 50 9.333e-07 1.129e-07
50-150 2.357e-06 3.676e-07
15-150 3.684e-06 5.138e-07
Peak spectrum fit
Power-law model
Time interval is from -0.084 sec. to 0.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15011 ( -0.0788021 0.0784365 )
Norm@50keV : 8.30199E-02 ( -0.00382868 0.0038282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.60 using 59 PHA bins.
# Reduced chi-squared = 0.9403 for 57 degrees of freedom
# Null hypothesis probability = 6.034842e-01
Photon flux (15-150 keV) in 1 sec: 9.68191 ( -0.459455 0.45984 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.5461e-07 ( -4.3366e-08 4.34905e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.084 sec. to 0.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.632554 ( -0.356676 0.329578 )
Epeak [keV] : 147.579 ( -38.6698 151.05 )
Norm@50keV : 0.143534 ( -0.0413766 0.0634402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.13 using 59 PHA bins.
# Reduced chi-squared = 0.8238 for 56 degrees of freedom
# Null hypothesis probability = 8.236916e-01
Photon flux (15-150 keV) in 1 sec: 9.48990 ( -0.47508 0.47504 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.34311e-07 ( -4.6367e-08 4.6113e-08 ) ergs/cm2
Band function
Time interval is from -0.084 sec. to 0.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.455016 ( -0.461414 1.03161 )
beta : -1.49215 ( 1.49269 0.259874 )
Epeak [keV] : 114.219 ( -57.6701 153.85 )
Norm@50keV : 0.180234 ( -0.0751153 0.632759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.76 using 59 PHA bins.
# Reduced chi-squared = 0.8319 for 55 degrees of freedom
# Null hypothesis probability = 8.082827e-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] : 19.4628 (-1.12358 1.21634)
R^2/D10^2 : 0.502810 (-0.0907134 0.108609)
(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 3.711e-08 3.340e-09
25- 50 1.815e-07 1.245e-08
50-150 5.075e-07 4.425e-08
15-150 7.261e-07 4.105e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 39.9196 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.940e-08 4.785e-09
25- 50 1.912e-07 8.900e-09
50-150 4.194e-07 2.410e-08
15-150 7.100e-07 3.855e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 31.9874 (-6.14409 14.0941)
R1^2/D10^2 : 7.87184E-02 (-0.0554545 0.0926965)
kT2 [keV] : 9.36373 (-2.40622 2.60853)
R2^2/D10^2 : 2.84169 (-1.29177 3.74444)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.155e-08 1.457e-08
25- 50 1.883e-07 3.040e-08
50-150 5.863e-07 1.646e-07
15-150 8.362e-07 1.873e-07
Plot creation:
Sun Nov 19 18:09:17 EST 2023