batgrbproduct analysis for trigger=1245636
batgrbproduct Analysis for Trigger=1245636
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): Wed Jul 31 11:51:17 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1245636/GCN5_download_cron
======================================================================
Trigger: 01245636 Segment: 000
BAT Trigger Time: 744018760 [s; MET]
Trigger Stop: 744018824 [s; MET]
UTC: 2024-07-30T07:52:06.099900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 37.8292169789855 Dec: 59.074165988813 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.74
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.74
Flight Position: [ source = BAT ]
RA: 37.8292169789855 Dec: 59.074165988813 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 37.8411693003919 Dec: 59.0454209065582 [deg; J2000]
{ 02h 31m 21.9s , +59d 02' 43.5" }
+/- 1.92723663645439 [arcmin] (estimated 90% radius based on SNR)
+/- 0.770398045911352 [arcmin] (formal 1-sigma fit error)
SNR: 11.9142941645658
Angular difference between Flight and Ground position is 1.763677 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 50.1319999694824 +/- 7.59672454258023
Measured from: -3.43199992179871
to: 46.7000000476837 [s; relative to TRIGTIME]
T50: 29.6599998474121 +/- 6.23637070546309
Measured from: 6.5880001783371
to: 36.2480000257492 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.79999995231628
to: 6.79999995231628 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.06400001049042
to: 53.4279999732971 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.316352 0.443529 0.331177 0.016241
0.045264 0.046650 0.039586 0.032984 [error]
Peak 0.019763 0.019806 0.011356 0.000231
0.005988 0.006078 0.005224 0.004335 [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 9.18e-08 1.68e-07 2.37e-07 7.01e-07 6.78e-07 1.20e-06 erg/cm2
Error 1.69e-08 1.99e-08 3.71e-08 2.28e-07 9.01e-08 2.60e-07 erg/cm2
Peak flux Power-law 1.59e-01 1.29e-01 7.14e-02 5.79e-02 3.85e-01 4.17e-01 ph/cm2/s
Error 7.63e-02 4.50e-02 4.09e-02 7.24e-02 1.33e-01 1.51e-01 ph/cm2/s
Fluence Cutoff-PL 8.00e-08 1.86e-07 2.47e-07 2.04e-07 6.31e-07 7.17e-07 erg/cm2
Error 2.01e-08 2.61e-08 4.23e-08 -------- 9.77e-08 2.68e-07 erg/cm2
Peak flux Cutoff-PL 1.52e-01 1.36e-01 7.27e-02 3.40e-02 3.81e-01 3.95e-01 ph/cm2/s
Error 1.39e-01 5.51e-02 4.54e-02 7.06e-02 1.33e-01 1.58e-01 ph/cm2/s
Fluence Band 7.94e-08 1.85e-07 2.46e-07 2.05e-07 6.30e-07 7.18e-07 erg/cm2
Error 1.92e-08 2.58e-08 4.01e-08 -------- -------- -------- erg/cm2
Peak flux Band 1.49e-01 1.37e-01 7.42e-02 3.57e-02 3.81e-01 3.96e-01 ph/cm2/s
Error 8.50e-02 -------- -------- 4.47e-02 1.34e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.505 0.194 - - 1.20e-03 1.45e-04 56.690 57
CPL 0.570 0.914 73.6 83.0 3.69e-03 5.30e-03 52.770 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.858 0.685 - - 2.73e-03 1.22e-03 66.460 57
CPL 1.433 1.852 59.5 0.0 4.72e-03 0.00e+00 66.350 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: 49.408000 sec.
T50 in the 50-300 keV band: 30.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 59.492 -6.064 53.428
T90 50.132 -3.432 46.700
T50 29.660 6.588 36.248
Peak 1.000 5.800 6.800
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
37.8412 +59.0454 0.0162 8.9 -99.6 1.1214 11.9 TRIG_01245636
------------------------------------------
Foreground time interval of the image:
-6.064 53.428 (delta_t = 59.492 [sec])
Background time interval of the image:
-209.699 -6.064 (delta_t = 203.635 [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 -6.064 sec. to 53.428 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50464 ( -0.192424 0.195265 )
Norm@50keV : 1.20291E-03 ( -0.00014553 0.000144354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.69 using 59 PHA bins.
# Reduced chi-squared = 0.9946 for 57 degrees of freedom
# Null hypothesis probability = 4.866676e-01
Photon flux (15-150 keV) in 59.49 sec: 0.150358 ( -0.0174664 0.01748 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78353e-07 ( -8.95039e-08 9.07936e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.064 sec. to 53.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.569856 ( -1.01195 0.81555 )
Epeak [keV] : 73.6415 ( -18.0461 147.947 )
Norm@50keV : 3.68788E-03 ( -0.00226817 0.00832837 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9423 for 56 degrees of freedom
# Null hypothesis probability = 5.979222e-01
Photon flux (15-150 keV) in 59.49 sec: 0.145055 ( -0.018153 0.018113 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30546e-07 ( -9.59841e-08 9.93899e-08 ) ergs/cm2
Band function
Time interval is from -6.064 sec. to 53.428 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.569736 ( -0.769955 1.06375 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 73.6253 ( -16.8825 146.998 )
Norm@50keV : 3.68846E-03 ( -0.00226898 0.0083334 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9594 for 55 degrees of freedom
# Null hypothesis probability = 5.603161e-01
Photon flux (15-150 keV) in 59.49 sec: 0.146503 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30404e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.4957 (-1.83955 2.1532)
R^2/D10^2 : 1.97585E-02 (-0.00766434 0.0121678)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.53 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.171274e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.197e-08 1.104e-08
25- 50 2.000e-07 2.844e-08
50-150 2.815e-07 7.290e-08
15-150 5.334e-07 8.742e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-82.4949 -199.362)
Norm : 0.617843 (-0.0707105 0.0707801)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.153e-08 5.051e-08
25- 50 1.761e-07 9.759e-08
50-150 3.861e-07 2.102e-07
15-150 6.537e-07 3.602e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.20909 (-2.49225 5.15653)
R1^2/D10^2 : 0.318091 (-0.27639 1.3063)
kT2 [keV] : 18.5102 (-3.66792 13.465)
R2^2/D10^2 : 7.25598E-03 (-0.00652026 0.00977909)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.340e-08 4.283e-08
25- 50 1.775e-07 7.329e-08
50-150 3.488e-07 1.753e-07
15-150 6.097e-07 2.738e-07
Peak spectrum fit
Power-law model
Time interval is from 5.800 sec. to 6.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85766 ( -0.611506 0.758364 )
Norm@50keV : 2.73131E-03 ( -0.00126791 0.00116317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.46 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 57 degrees of freedom
# Null hypothesis probability = 1.832211e-01
Photon flux (15-150 keV) in 1 sec: 0.385114 ( -0.133471 0.133485 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51117e-08 ( -1.06777e-08 1.14443e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.800 sec. to 6.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43290 ( -2.93461 0.768661 )
Epeak [keV] : 59.4512 ( )
Norm@50keV : 4.72355E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.35 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 56 degrees of freedom
# Null hypothesis probability = 1.622500e-01
Photon flux (15-150 keV) in 1 sec: 0.381361 ( -0.132329 0.134472 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43688e-08 ( -1.06894e-08 1.19331e-08 ) ergs/cm2
Band function
Time interval is from 5.800 sec. to 6.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.50140 ( 1.58128 3.09213 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 59.4825 ( -43.7122 -59.4825 )
Norm@50keV : 4.39452E-03 ( -0.00265068 0.0222574 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.35 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.404963e-01
Photon flux (15-150 keV) in 1 sec: 0.381318 ( 6.61868 -0.133264 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.42912e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.6719 (-5.38611 8.08847)
R^2/D10^2 : 0.102585 (-0.0996504 0.871723)
(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 2.948e-09 1.936e-09
25- 50 8.975e-09 5.565e-09
50-150 7.214e-09 5.610e-09
15-150 1.914e-08 1.257e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.7458 (-89.7458 -89.7458)
Norm : 1.76315 (-0.692301 1.30851)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.600e-09 2.922e-09
25- 50 7.776e-09 4.827e-09
50-150 1.182e-08 1.010e-08
15-150 2.419e-08 1.672e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.25610 (-3.85994 6.67775)
R1^2/D10^2 : 3.18926 (-3.10732 -3.19143)
kT2 [keV] : 18.4865 (-18.4819 52.5652)
R2^2/D10^2 : 1.60127E-02 (-0.0158685 0.160284)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.973e-09 2.856e-09
25- 50 6.792e-09 3.647e-09
50-150 1.282e-08 8.990e-09
15-150 2.458e-08 1.415e-08
Plot creation:
Wed Jul 31 11:54:25 EDT 2024