batgrbproduct analysis for trigger=1114148
batgrbproduct Analysis for Trigger=1114148
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 3 03:51:28 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1114148/GCN5_download_cron
======================================================================
Trigger: 01114148 Segment: 000
BAT Trigger Time: 678419616 [s; MET]
Trigger Stop: 678420216 [s; MET]
UTC: 2022-07-02T01:53:06.579200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 264.571687514825 Dec: -26.9640254804211 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.21
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.21
Flight Position: [ source = BAT ]
RA: 264.571687514825 Dec: -26.9640254804211 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 264.592598855702 Dec: -27.0129242083122 [deg; J2000]
{ 17h 38m 22.2s , -27d 00' 46.5" }
+/- 1.76464647058778 [arcmin] (estimated 90% radius based on SNR)
+/- 0.695771773930279 [arcmin] (formal 1-sigma fit error)
SNR: 13.5129515679598
Angular difference between Flight and Ground position is 3.139734 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 338.240000009537 +/- 33.505327749592
Measured from: 118.520000100136
to: 456.760000109673 [s; relative to TRIGTIME]
T50: 171.792000055313 +/- 35.5403274096625
Measured from: 211.152000069618
to: 382.944000124931 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 325.539999961853
to: 326.539999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: 84.8320000171661
to: 485.919999957085 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.934422 0.436522 0.126009 -0.003213
0.131364 0.113193 0.094035 0.081007 [error]
Peak 0.036571 0.018694 0.007577 0.006548
0.006813 0.005750 0.004840 0.003997 [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 1.72e-06 2.63e-07 1.85e-08 1.39e-09 2.00e-06 2.00e-06 erg/cm2
Error 1.65e-07 4.78e-08 8.11e-09 1.05e-09 1.73e-07 1.73e-07 erg/cm2
Peak flux Power-law 3.58e-01 1.34e-01 2.90e-02 7.48e-03 5.25e-01 5.28e-01 ph/cm2/s
Error 1.03e-01 5.52e-02 2.63e-02 1.40e-02 1.39e-01 1.41e-01 ph/cm2/s
Fluence Cutoff-PL 1.74e-06 1.76e-07 1.83e-10 5.92e-17 1.92e-06 1.92e-06 erg/cm2
Error 1.82e-07 5.69e-08 1.14e-09 3.09e-13 1.84e-07 1.84e-07 erg/cm2
Peak flux Cutoff-PL 3.58e-01 1.34e-01 2.87e-02 7.31e-03 5.25e-01 5.27e-01 ph/cm2/s
Error 1.03e-01 5.52e-02 3.06e-02 1.61e-02 1.40e-01 1.46e-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 5.829 0.377 - - 5.03e-05 1.79e-05 73.390 57
CPL 1.000 0.000 50.0 0.0 8.96e-04 0.00e+00 361.180 56
The chi2 of BB fit is 62.55 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.210 0.845 - - 1.63e-03 1.14e-03 56.890 57
CPL 1.000 0.000 50.0 0.0 9.23e-03 0.00e+00 70.300 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 401.088 84.832 485.920
T90 338.240 118.520 456.760
T50 171.792 211.152 382.944
Peak 1.000 325.540 326.540
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
264.5926 -27.0129 0.0142 5.1 -163.1 6.3197 13.5 TRIG_01114148
------------------------------------------
Foreground time interval of the image:
84.832 167.830 (delta_t = 82.998 [sec])
170.000 221.880 (delta_t = 51.880 [sec])
241.000 252.720 (delta_t = 11.720 [sec])
254.000 485.920 (delta_t = 231.920 [sec])
Background time interval of the image:
-19.899 -12.270 (delta_t = 7.629 [sec])
-11.000 84.832 (delta_t = 95.832 [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
Multiple GTIs in the spectrum
tstart tstop
84.832000 167.830000
170.000000 221.880000
241.000000 252.720000
254.000000 485.920000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.82875 ( -0.371874 0.382385 )
Norm@50keV : 5.02866E-05 ( -1.54747e-05 2.0375e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.39 using 59 PHA bins.
# Reduced chi-squared = 1.287 for 57 degrees of freedom
# Null hypothesis probability = 7.085638e-02
Photon flux (15-150 keV) in 378.5 sec: 0.174358 ( -0.0159626 0.0160164 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99975e-06 ( -1.73137e-07 1.73333e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
84.832000 167.830000
170.000000 221.880000
241.000000 252.720000
254.000000 485.920000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.96254E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 361.18 using 59 PHA bins.
# Reduced chi-squared = 6.4497 for 56 degrees of freedom
# Null hypothesis probability = 3.416394e-46
Photon flux (15-150 keV) in 378.5 sec: 0.169940 ( -0.0177 0.01741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91761e-06 ( -1.85219e-07 1.82766e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
84.832000 167.830000
170.000000 221.880000
241.000000 252.720000
254.000000 485.920000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.663569 ( -2.27175 2.37915 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 8.62897 ( -1.25055 3.84834 )
Norm@50keV : 10.5461 ( -10.5461 19834.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.254271e-01
Photon flux (15-150 keV) in 378.5 sec: 0.114892 ( 6.88511 -0.011393 ) 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] : 2.68021 (-0.187871 0.210496)
R^2/D10^2 : 51.2615 (-22.5363 39.7777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.55 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 57 degrees of freedom
# Null hypothesis probability = 2.858472e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.739e-06 3.030e-07
25- 50 1.680e-07 3.777e-08
50-150 1.025e-10 7.232e-11
15-150 1.907e-06 3.448e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.78657 (-0.487368 0.576958)
Norm : 46.8096 (-17.4234 28.0559)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.749e-06 2.824e-07
25- 50 2.000e-07 4.413e-08
50-150 8.280e-10 5.481e-10
15-150 1.950e-06 2.623e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.09825 ( )
R1^2/D10^2 : 2.62386 ( )
kT2 [keV] : 3.17725 ( )
R2^2/D10^2 : 1.87764E-03 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-06 7.135e-07
25- 50 3.924e-07 2.667e-07
50-150 5.513e-09 4.915e-09
15-150 1.413e-06 1.028e-06
Peak spectrum fit
Power-law model
Time interval is from 325.540 sec. to 326.540 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.21015 ( -0.721148 0.969307 )
Norm@50keV : 1.63286E-03 ( -0.00100684 0.00126372 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.89 using 59 PHA bins.
# Reduced chi-squared = 0.9980 for 57 degrees of freedom
# Null hypothesis probability = 4.792391e-01
Photon flux (15-150 keV) in 1 sec: 0.525355 ( -0.138614 0.13916 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17694e-08 ( -7.21783e-09 8.36857e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 325.540 sec. to 326.540 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.23179E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.30 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 56 degrees of freedom
# Null hypothesis probability = 9.463371e-02
Photon flux (15-150 keV) in 1 sec: 0.524846 ( -0.142027 0.137915 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15845e-08 ( -8.1689e-09 8.2848e-09 ) ergs/cm2
Band function
Time interval is from 325.540 sec. to 326.540 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.70005 ( 1.65714 1.65714 )
beta : -3.53198 ( 3.90231 1.38682 )
Epeak [keV] : 5.76101 ( -5.73 11.3265 )
Norm@50keV : 1.87793E-02 ( -0.0115665 374007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.82 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.071695e-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] : 4.84392 (-1.15874 1.37481)
R^2/D10^2 : 5.16199 (-5.16199 14.8815)
(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 1.104e-08 6.415e-09
25- 50 6.661e-09 4.177e-09
50-150 2.318e-10 2.227e-10
15-150 1.793e-08 1.045e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.6524 (-5.57293 11.4507)
Norm : 10.6800 (-2.75941 2.75941)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.105e-08 1.210e-08
25- 50 6.845e-09 1.224e-08
50-150 9.906e-10 4.879e-09
15-150 1.888e-08 2.912e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61673 (-1.16623 1.32756)
R1^2/D10^2 : 6.31480 (-6.12152 8.32756)
kT2 [keV] : 76.8895 (-99.7251 -99.7251)
R2^2/D10^2 : 1.80715E-04 (-0.000114371 6.64577)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.112e-08 6.410e-09
25- 50 6.531e-09 3.693e-09
50-150 1.109e-08 7.740e-09
15-150 2.874e-08 1.513e-08
Plot creation:
Sun Jul 3 03:55:49 EDT 2022