batgrbproduct analysis for trigger=1205319
batgrbproduct Analysis for Trigger=1205319
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 Dec 30 23:27:33 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1205319/GCN5_download_cron
======================================================================
Trigger: 01205319 Segment: 000
BAT Trigger Time: 725592581.376 [s; MET]
Trigger Stop: 725592584.448 [s; MET]
UTC: 2023-12-30T01:29:08.738220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.197505172734 Dec: 58.1197216671146 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.14
Image Trigger?: NO
Rate S/N Ratio: 25.9807621135332 [ if not an image trigger ]
Image S/N Ratio: 9.14
Flight Position: [ source = BAT ]
RA: 245.197505172734 Dec: 58.1197216671146 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.222983376624 Dec: 58.1317162294758 [deg; J2000]
{ 16h 20m 53.5s , +58d 07' 54.2" }
+/- 1.12441385105885 [arcmin] (estimated 90% radius based on SNR)
+/- 0.434888560716544 [arcmin] (formal 1-sigma fit error)
SNR: 25.7256694184578
Angular difference between Flight and Ground position is 1.081463 arcmin
Partial Coding Fraction: 0.3554688 [ including projection effects ]
Duration
T90: 15.2439999580383 +/- 0.919452061231655
Measured from: 1.12800002098083
to: 16.3719999790192 [s; relative to TRIGTIME]
T50: 7.75600004196167 +/- 1.43694121245971
Measured from: 5.51600003242493
to: 13.2720000743866 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.63599991798401
to: 8.63599991798401 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.25599992275238
to: 17.2639999389648 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.561331 0.996172 1.038184 0.295021
0.050379 0.055784 0.050327 0.042782 [error]
Peak 0.036992 0.094700 0.100570 0.037389
0.012305 0.014551 0.012936 0.010682 [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 2.24e-07 4.72e-07 7.76e-07 2.89e-06 2.14e-06 4.36e-06 erg/cm2
Error 2.45e-08 3.11e-08 4.86e-08 4.03e-07 1.24e-07 4.29e-07 erg/cm2
Peak flux Power-law 6.21e-01 7.21e-01 6.03e-01 8.50e-01 2.25e+00 2.80e+00 ph/cm2/s
Error 1.80e-01 1.33e-01 9.85e-02 2.79e-01 3.66e-01 4.27e-01 ph/cm2/s
Fluence Cutoff-PL 2.05e-07 4.85e-07 8.10e-07 1.81e-06 2.11e-06 3.31e-06 erg/cm2
Error 3.07e-08 3.46e-08 5.93e-08 8.31e-07 1.29e-07 8.25e-07 erg/cm2
Peak flux Cutoff-PL 4.98e-01 7.69e-01 6.77e-01 4.05e-01 2.19e+00 2.35e+00 ph/cm2/s
Error 2.21e-01 1.57e-01 1.33e-01 -------- 3.74e-01 5.58e-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 1.281 0.095 - - 1.27e-02 7.03e-04 41.760 57
CPL 0.900 0.394 163.8 1387.1 1.89e-02 7.53e-03 38.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.258 0.244 - - 1.90e-02 2.90e-03 47.590 57
CPL 0.331 1.248 101.1 -34.1 5.07e-02 1.16e-01 45.530 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: 16.384000 sec.
T50 in the 50-300 keV band: 9.024000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 17.008 0.256 17.264
T90 15.244 1.128 16.372
T50 7.756 5.516 13.272
Peak 1.000 7.636 8.636
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.2230 +58.1317 0.0074 45.8 -152.6 3.0623 25.7 TRIG_01205319
------------------------------------------
Foreground time interval of the image:
0.256 17.264 (delta_t = 17.008 [sec])
Background time interval of the image:
-239.376 0.256 (delta_t = 239.632 [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 0.256 sec. to 17.264 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28121 ( -0.0954602 0.0945416 )
Norm@50keV : 1.26850E-02 ( -0.000703309 0.000702523 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7326 for 57 degrees of freedom
# Null hypothesis probability = 9.351105e-01
Photon flux (15-150 keV) in 17.01 sec: 1.50825 ( -0.089704 0.0899472 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14217e-06 ( -1.23928e-07 1.24108e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.256 sec. to 17.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.899729 ( -0.414238 0.374285 )
Epeak [keV] : 163.786 ( -57.0757 2717.05 )
Norm@50keV : 1.88759E-02 ( -0.00530823 0.0097513 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.82 using 59 PHA bins.
# Reduced chi-squared = 0.6932 for 56 degrees of freedom
# Null hypothesis probability = 9.610463e-01
Photon flux (15-150 keV) in 17.01 sec: 1.48219 ( -0.09324 0.09347 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11135e-06 ( -1.29667e-07 1.29072e-07 ) ergs/cm2
Band function
Time interval is from 0.256 sec. to 17.264 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.862899 ( -0.46472 1.36893 )
beta : -1.66399 ( 1.64831 0.392936 )
Epeak [keV] : 150.987 ( -75.0329 512.11 )
Norm@50keV : 1.97279E-02 ( -0.00610372 0.241911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.70 using 59 PHA bins.
# Reduced chi-squared = 0.7037 for 55 degrees of freedom
# Null hypothesis probability = 9.530950e-01
Photon flux (15-150 keV) in 17.01 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] : 19.3340 (-1.30219 1.43366)
R^2/D10^2 : 7.64365E-02 (-0.0166314 0.0207293)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.18 using 59 PHA bins.
# Reduced chi-squared = 1.652 for 57 degrees of freedom
# Null hypothesis probability = 1.418670e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.492e-08 1.200e-08
25- 50 4.621e-07 4.023e-08
50-150 1.274e-06 1.119e-07
15-150 1.831e-06 1.167e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-10.5936 -200)
Norm : 6.41347 (-0.358043 0.358043)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.716e-07 1.710e-08
25- 50 5.225e-07 3.462e-08
50-150 1.146e-06 8.667e-08
15-150 1.940e-06 1.352e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.22565 (-1.51919 1.97604)
R1^2/D10^2 : 1.09946 (-0.587383 1.43012)
kT2 [keV] : 27.7373 (-3.73702 6.30391)
R2^2/D10^2 : 1.92935E-02 (-0.00995535 0.013276)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.033e-07 5.742e-08
25- 50 4.825e-07 9.602e-08
50-150 1.421e-06 2.756e-07
15-150 2.107e-06 3.633e-07
Peak spectrum fit
Power-law model
Time interval is from 7.636 sec. to 8.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25832 ( -0.247118 0.239913 )
Norm@50keV : 1.90096E-02 ( -0.00290554 0.00289854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.59 using 59 PHA bins.
# Reduced chi-squared = 0.8350 for 57 degrees of freedom
# Null hypothesis probability = 8.081762e-01
Photon flux (15-150 keV) in 1 sec: 2.25141 ( -0.365029 0.367116 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89835e-07 ( -2.98172e-08 2.98885e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.636 sec. to 8.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.331433 ( -1.4793 1.01652 )
Epeak [keV] : 101.115 ( -32.8366 -101.112 )
Norm@50keV : 5.06883E-02 ( -0.0506907 0.180609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8130 for 56 degrees of freedom
# Null hypothesis probability = 8.400327e-01
Photon flux (15-150 keV) in 1 sec: 2.19079 ( -0.37333 0.3752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8503e-07 ( -3.1713e-08 3.1145e-08 ) ergs/cm2
Band function
Time interval is from 7.636 sec. to 8.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.396364 ( -1.61876 4.50006 )
beta : -1.78923 ( 1.79463 0.595661 )
Epeak [keV] : 71.3467 ( -22.2457 120.798 )
Norm@50keV : 0.125839 ( -0.137676 61.7713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.82 using 59 PHA bins.
# Reduced chi-squared = 0.8149 for 55 degrees of freedom
# Null hypothesis probability = 8.348336e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84827e-07 ( -1.8482e-07 -3.082e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.3516 (-2.80403 3.67907)
R^2/D10^2 : 0.143618 (-0.068154 0.113201)
(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 9.623e-09 2.989e-09
25- 50 4.515e-08 1.033e-08
50-150 1.109e-07 2.915e-08
15-150 1.657e-07 3.620e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-48.3321 -200)
Norm : 9.63296 (-1.48086 1.48086)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.400e-08 1.400e-08
25- 50 4.617e-08 2.611e-08
50-150 1.013e-07 5.740e-08
15-150 1.714e-07 9.765e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 64.1757 (-53.3647 -53.3648)
R1^2/D10^2 : 1.60271E-03 (-0.00146954 0.108046)
kT2 [keV] : 13.7738 (-12.3335 4.60656)
R2^2/D10^2 : 0.298443 (-0.169539 15.8942)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.454e-08 5.123e-09
25- 50 4.226e-08 1.290e-08
50-150 1.143e-07 3.389e-08
15-150 1.711e-07 4.421e-08
Plot creation:
Sat Dec 30 23:30:34 EST 2023