batgrbproduct analysis for trigger=1264304
batgrbproduct Analysis for Trigger=1264304
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): Sat Nov 2 07:03:21 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1264304/GCN5_download_cron
======================================================================
Trigger: 01264304 Segment: 000
BAT Trigger Time: 752132540.224 [s; MET]
Trigger Stop: 752132541.248 [s; MET]
UTC: 2024-11-01T05:41:45.768580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 204.332981941944 Dec: 28.2635808935666 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.27
Image Trigger?: NO
Rate S/N Ratio: 22 [ if not an image trigger ]
Image S/N Ratio: 11.27
Flight Position: [ source = BAT ]
RA: 204.332981941944 Dec: 28.2635808935666 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 204.323046389437 Dec: 28.2380450223198 [deg; J2000]
{ 13h 37m 17.5s , +28d 14' 17.0" }
+/- 1.20672943710047 [arcmin] (estimated 90% radius based on SNR)
+/- 0.372123937676397 [arcmin] (formal 1-sigma fit error)
SNR: 23.2558811036455
Angular difference between Flight and Ground position is 1.619644 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 10.8919999599457 +/- 3.90243252117558
Measured from: -2.17999982833862
to: 8.71200013160706 [s; relative to TRIGTIME]
T50: 3.16799986362457 +/- 0.755502541649496
Measured from: -0.283999800682068
to: 2.8840000629425 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.287999987602234
to: 0.712000012397766 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.76399993896484
to: 12.892000079155 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.318207 0.367943 0.213599 0.034140
0.022216 0.023205 0.019365 0.016486 [error]
Peak 0.050138 0.073463 0.055872 0.006147
0.006183 0.006635 0.005423 0.004357 [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 9.28e-08 1.43e-07 1.65e-07 3.65e-07 5.08e-07 7.66e-07 erg/cm2
Error 1.05e-08 1.03e-08 1.88e-08 8.55e-08 4.34e-08 1.03e-07 erg/cm2
Peak flux Power-law 4.85e-01 4.81e-01 3.34e-01 3.66e-01 1.45e+00 1.67e+00 ph/cm2/s
Error 7.87e-02 5.01e-02 4.31e-02 9.34e-02 1.46e-01 1.69e-01 ph/cm2/s
Fluence Cutoff-PL 8.95e-08 1.48e-07 1.65e-07 2.14e-07 4.93e-07 6.16e-07 erg/cm2
Error 1.18e-08 1.33e-08 1.98e-08 1.63e-07 4.99e-08 1.60e-07 erg/cm2
Peak flux Cutoff-PL 4.14e-01 5.25e-01 3.58e-01 1.49e-01 1.40e+00 1.45e+00 ph/cm2/s
Error 9.44e-02 6.20e-02 5.03e-02 -------- 1.50e-01 1.80e-01 ph/cm2/s
Fluence Band 8.79e-08 1.49e-07 1.60e-07 3.14e-07 4.97e-07 7.12e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.32e-01 5.16e-01 3.55e-01 1.81e-01 1.41e+00 1.48e+00 ph/cm2/s
Error 8.77e-02 6.40e-02 4.74e-02 -------- 1.55e-01 1.90e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.792 0.135 - - 3.53e-03 2.92e-04 42.630 57
CPL 1.479 0.416 74.9 -24.8 5.23e-03 3.61e-03 41.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.527 0.165 - - 1.15e-02 1.19e-03 58.840 57
CPL 0.602 0.745 74.8 42.3 3.41e-02 3.49e-02 53.180 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: 5.760000 sec.
T50 in the 50-300 keV band: 2.752000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.656 -2.764 12.892
T90 10.892 -2.180 8.712
T50 3.168 -0.284 2.884
Peak 1.000 -0.288 0.712
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
204.3230 +28.2380 0.0083 12.6 -145.7 0.9475 23.3 TRIG_01264304
------------------------------------------
Foreground time interval of the image:
-2.764 12.892 (delta_t = 15.656 [sec])
Background time interval of the image:
-239.224 -77.284 (delta_t = 161.940 [sec])
-76.224 -2.764 (delta_t = 73.460 [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 -2.764 sec. to 12.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79230 ( -0.133436 0.13669 )
Norm@50keV : 3.52574E-03 ( -0.000293697 0.000289769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.63 using 59 PHA bins.
# Reduced chi-squared = 0.7479 for 57 degrees of freedom
# Null hypothesis probability = 9.214719e-01
Photon flux (15-150 keV) in 15.66 sec: 0.484398 ( -0.0353665 0.0353858 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08444e-07 ( -4.31303e-08 4.36577e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.764 sec. to 12.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47931 ( -0.56313 0.268602 )
Epeak [keV] : 74.9095 ( -25.2265 -74.9095 )
Norm@50keV : 5.23236E-03 ( -0.0019277 0.00529941 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.51 using 59 PHA bins.
# Reduced chi-squared = 0.7413 for 56 degrees of freedom
# Null hypothesis probability = 9.256951e-01
Photon flux (15-150 keV) in 15.66 sec: 0.477291 ( -0.037092 0.037063 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92754e-07 ( -4.96344e-08 5.01919e-08 ) ergs/cm2
Band function
Time interval is from -2.764 sec. to 12.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47934 ( 1.45529 0.515522 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 74.8981 ( -24.4345 -74.8981 )
Norm@50keV : 5.23130E-03 ( -0.00192783 0.00530111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.51 using 59 PHA bins.
# Reduced chi-squared = 0.7547 for 55 degrees of freedom
# Null hypothesis probability = 9.105989e-01
Photon flux (15-150 keV) in 15.66 sec: 0.477509 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.97163e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5221 (-1.0649 1.19164)
R^2/D10^2 : 0.132648 (-0.040631 0.0578432)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.42 using 59 PHA bins.
# Reduced chi-squared = 1.499 for 57 degrees of freedom
# Null hypothesis probability = 8.749762e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.807e-08 7.963e-09
25- 50 1.740e-07 1.456e-08
50-150 1.351e-07 2.420e-08
15-150 3.672e-07 3.093e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.7841 (-23.007 43.9704)
Norm : 2.13494 (-0.223666 0.233415)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.738e-08 1.045e-08
25- 50 1.510e-07 1.327e-08
50-150 2.445e-07 8.237e-08
15-150 4.829e-07 9.161e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.24433 (-1.3213 1.42185)
R1^2/D10^2 : 0.884522 (-0.443827 1.21661)
kT2 [keV] : 22.4135 (-4.78321 8.54817)
R2^2/D10^2 : 8.45732E-03 (-0.00585492 0.0124797)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.804e-08 2.654e-08
25- 50 1.476e-07 3.791e-08
50-150 2.538e-07 1.239e-07
15-150 4.895e-07 1.535e-07
Peak spectrum fit
Power-law model
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52699 ( -0.163761 0.166184 )
Norm@50keV : 1.14948E-02 ( -0.00119352 0.00118588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.84 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.078178e-01
Photon flux (15-150 keV) in 1 sec: 1.44566 ( -0.145501 0.145628 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08581e-07 ( -1.22097e-08 1.23326e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.601576 ( -0.808494 0.682163 )
Epeak [keV] : 74.7788 ( -16.0937 68.4093 )
Norm@50keV : 3.41108E-02 ( -0.0184866 0.0512485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.18 using 59 PHA bins.
# Reduced chi-squared = 0.9497 for 56 degrees of freedom
# Null hypothesis probability = 5.821563e-01
Photon flux (15-150 keV) in 1 sec: 1.39853 ( -0.15027 0.15001 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02404e-07 ( -1.28125e-08 1.3104e-08 ) ergs/cm2
Band function
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.600726 ( -0.619662 0.88824 )
beta : -10.00000 ( 10 4.40643e-11 )
Epeak [keV] : 74.7264 ( -16.0512 68.3626 )
Norm@50keV : 3.41510E-02 ( -0.00335593 0.00335593 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.18 using 59 PHA bins.
# Reduced chi-squared = 0.9670 for 55 degrees of freedom
# Null hypothesis probability = 5.443183e-01
Photon flux (15-150 keV) in 1 sec: 1.41476 ( 5.58524 -0.16915 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04793e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0095 (-1.66799 1.89475)
R^2/D10^2 : 0.168500 (-0.0580805 0.0872456)
(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 7.947e-09 1.540e-09
25- 50 3.159e-08 4.425e-09
50-150 4.845e-08 9.340e-09
15-150 8.800e-08 1.160e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 197.927 (-75.6176 -198.069)
Norm : 5.94187 (-0.585451 0.644199)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.481e-08 8.275e-09
25- 50 2.847e-08 1.369e-08
50-150 6.228e-08 3.276e-08
15-150 1.056e-07 5.077e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.25823 (-2.01101 2.76201)
R1^2/D10^2 : 3.18813 (-2.44243 22.1425)
kT2 [keV] : 19.3160 (-3.17828 5.28922)
R2^2/D10^2 : 5.98389E-02 (-0.0374094 0.0490828)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-08 6.905e-09
25- 50 2.819e-08 1.085e-08
50-150 5.874e-08 2.292e-08
15-150 1.007e-07 3.869e-08
Plot creation:
Sat Nov 2 07:08:27 EDT 2024