batgrbproduct analysis for trigger=1167288
batgrbproduct Analysis for Trigger=1167288
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 May 7 18:40:12 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1167288/GCN5_download_cron
======================================================================
Trigger: 01167288 Segment: 000
BAT Trigger Time: 705085790.592 [s; MET]
Trigger Stop: 705085791.616 [s; MET]
UTC: 2023-05-06T17:09:19.357080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 134.373246151572 Dec: 45.1256110571573 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.73
Image Trigger?: NO
Rate S/N Ratio: 11.2249721603218 [ if not an image trigger ]
Image S/N Ratio: 7.73
Flight Position: [ source = BAT ]
RA: 134.373246151572 Dec: 45.1256110571573 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 134.37130800613 Dec: 45.1307397460312 [deg; J2000]
{ 08h 57m 29.1s , +45d 07' 50.7" }
+/- 1.4322381122956 [arcmin] (estimated 90% radius based on SNR)
+/- 0.797887738240301 [arcmin] (formal 1-sigma fit error)
SNR: 18.2070458274687
Angular difference between Flight and Ground position is 0.318471 arcmin
Partial Coding Fraction: 0.46875 [ including projection effects ]
Duration
T90: 31 +/- 6.32455532033676
Measured from: -7.5919998884201
to: 23.4080001115799 [s; relative to TRIGTIME]
T50: 9 +/- 3.60555127546399
Measured from: -1.5919998884201
to: 7.4080001115799 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.407999992370605
to: 1.40799999237061 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.59200000762939
to: 28.4079999923706 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.981950 1.106976 0.625407 0.202046
0.086568 0.089588 0.077946 0.068001 [error]
Peak 0.083923 0.111259 0.070917 0.026915
0.016493 0.017650 0.015670 0.012354 [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 3.41e-07 4.93e-07 5.30e-07 1.06e-06 1.69e-06 2.43e-06 erg/cm2
Error 4.77e-08 4.54e-08 7.71e-08 3.12e-07 1.79e-07 3.89e-07 erg/cm2
Peak flux Power-law 9.84e-01 7.93e-01 4.32e-01 3.45e-01 2.36e+00 2.55e+00 ph/cm2/s
Error 2.69e-01 1.51e-01 1.19e-01 1.80e-01 4.52e-01 4.86e-01 ph/cm2/s
Fluence Cutoff-PL 3.35e-07 5.05e-07 5.30e-07 7.59e-07 1.66e-06 2.13e-06 erg/cm2
Error 5.20e-08 5.81e-08 7.98e-08 6.65e-07 2.04e-07 6.13e-07 erg/cm2
Peak flux Cutoff-PL 9.15e-01 8.69e-01 4.44e-01 1.50e-01 2.33e+00 2.38e+00 ph/cm2/s
Error 2.95e-01 1.98e-01 1.40e-01 2.47e-01 4.55e-01 5.13e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 9.26e-01 8.58e-01 4.45e-01 1.70e-01 2.34e+00 2.40e+00 ph/cm2/s
Error -------- -------- -------- -------- 4.56e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.895 0.169 - - 4.98e-03 5.31e-04 52.020 57
CPL 1.711 0.630 69.2 0.0 6.31e-03 0.00e+00 51.770 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.876 0.318 - - 1.66e-02 3.61e-03 64.760 57
CPL 1.165 1.287 51.9 0.0 4.19e-02 0.00e+00 63.620 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: 11.392000 sec.
T50 in the 50-300 keV band: 6.464000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 37.000 -8.592 28.408
T90 31.000 -7.592 23.408
T50 9.000 -1.592 7.408
Peak 1.000 0.408 1.408
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
134.3713 +45.1307 0.0105 42.9 -163.3 3.1455 18.2 TRIG_01167288
------------------------------------------
Foreground time interval of the image:
-8.592 28.408 (delta_t = 37.000 [sec])
Background time interval of the image:
-239.592 -8.592 (delta_t = 231.000 [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 -8.592 sec. to 28.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89461 ( -0.166066 0.171631 )
Norm@50keV : 4.97671E-03 ( -0.000535588 0.000526151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.02 using 59 PHA bins.
# Reduced chi-squared = 0.9126 for 57 degrees of freedom
# Null hypothesis probability = 6.620365e-01
Photon flux (15-150 keV) in 37 sec: 0.712582 ( -0.0667379 0.0667987 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69285e-06 ( -1.78446e-07 1.80498e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.592 sec. to 28.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71086 ( -0.721101 0.538621 )
Epeak [keV] : 69.1697 ( )
Norm@50keV : 6.31264E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.77 using 59 PHA bins.
# Reduced chi-squared = 0.9245 for 56 degrees of freedom
# Null hypothesis probability = 6.354457e-01
Photon flux (15-150 keV) in 37 sec: 0.707623 ( -0.068901 0.068717 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66389e-06 ( -2.06808e-07 2.01909e-07 ) ergs/cm2
Band function
Time interval is from -8.592 sec. to 28.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93328 ( -6.50693 -4.93328 )
beta : -2.02272 ( -0.247799 0.19827 )
Epeak [keV] : 22.8628 ( -5.54299 3.6671 )
Norm@50keV : 1187.81 ( -108.762 7180.48 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.43 using 59 PHA bins.
# Reduced chi-squared = 0.8805 for 55 degrees of freedom
# Null hypothesis probability = 7.220867e-01
Photon flux (15-150 keV) in 37 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] : 10.4512 (-1.19476 1.37058)
R^2/D10^2 : 0.278562 (-0.104497 0.165392)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.03 using 59 PHA bins.
# Reduced chi-squared = 1.422 for 57 degrees of freedom
# Null hypothesis probability = 1.992361e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.324e-07 3.482e-08
25- 50 6.142e-07 6.919e-08
50-150 3.637e-07 9.126e-08
15-150 1.210e-06 1.352e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.0758 (-22.5687 38.4038)
Norm : 3.29610 (-0.443675 0.552257)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.172e-07 4.357e-08
25- 50 5.268e-07 5.014e-08
50-150 7.625e-07 3.117e-07
15-150 1.606e-06 3.243e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.83397 (-1.53585 1.60756)
R1^2/D10^2 : 1.10992 (-0.57388 1.1975)
kT2 [keV] : 28.0974 (-9.66574 33.1011)
R2^2/D10^2 : 4.77572E-03 (-0.00423156 0.0184912)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.230e-07 9.052e-08
25- 50 5.286e-07 1.474e-07
50-150 8.363e-07 4.230e-07
15-150 1.688e-06 6.020e-07
Peak spectrum fit
Power-law model
Time interval is from 0.408 sec. to 1.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87641 ( -0.30634 0.330655 )
Norm@50keV : 1.66350E-02 ( -0.00366631 0.00355965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.76 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.243211e-01
Photon flux (15-150 keV) in 1 sec: 2.36375 ( -0.451824 0.452192 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52926e-07 ( -3.27987e-08 3.34244e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.408 sec. to 1.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16512 ( -1.55762 1.01545 )
Epeak [keV] : 51.9146 ( )
Norm@50keV : 4.18528E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.62 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 56 degrees of freedom
# Null hypothesis probability = 2.258833e-01
Photon flux (15-150 keV) in 1 sec: 2.33189 ( -0.45464 0.45501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45907e-07 ( -3.5192e-08 3.558e-08 ) ergs/cm2
Band function
Time interval is from 0.408 sec. to 1.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16622 ( -2.55349 1.4555 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 51.9078 ( -20.4313 -51.9078 )
Norm@50keV : 4.17952E-02 ( -0.0417951 0.300611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.62 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Null hypothesis probability = 1.988644e-01
Photon flux (15-150 keV) in 1 sec: 2.34101 ( 4.65899 -0.46564 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46702e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3200 (-2.42012 3.25035)
R^2/D10^2 : 1.00618 (-0.641793 1.75891)
(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 2.204e-08 8.000e-09
25- 50 5.726e-08 1.878e-08
50-150 3.272e-08 1.608e-08
15-150 1.120e-07 3.662e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.7924 (-36.5459 98.8775)
Norm : 11.1137 (-2.74336 3.67431)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.892e-08 7.505e-09
25- 50 4.812e-08 1.225e-08
50-150 7.004e-08 4.592e-08
15-150 1.471e-07 5.829e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.44325 (-2.03547 2.70368)
R1^2/D10^2 : 4.44964 (-3.15049 5.4935)
kT2 [keV] : 23.0772 (-23.116 34.2367)
R2^2/D10^2 : 3.26280E-02 (-0.0308738 0.0709024)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-08 1.788e-08
25- 50 4.842e-08 2.654e-08
50-150 7.178e-08 4.548e-08
15-150 1.503e-07 7.855e-08
Plot creation:
Sun May 7 18:43:33 EDT 2023