batgrbproduct analysis for trigger=765130
batgrbproduct Analysis for Trigger=765130
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Jul 29 10:41:17 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger765130
======================================================================
Trigger: 00765130 Segment: 000
BAT Trigger Time: 522975818.88 [s; MET]
Trigger Stop: 522975819.136 [s; MET]
UTC: 2017-07-28T23:03:19.438780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 238.044095700942 Dec: 70.1423694896049 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.73
Image Trigger?: NO
Rate S/N Ratio: 41.5571895103603 [ if not an image trigger ]
Image S/N Ratio: 6.73
Flight Position: [ source = BAT ]
RA: 238.044095700942 Dec: 70.1423694896049 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 238.018818171544 Dec: 70.1111218030441 [deg; J2000]
{ 15h 52m 04.5s , +70d 06' 40.0" }
+/- 2.33848312504942 [arcmin] (estimated 90% radius based on SNR)
+/- 1.20978776801455 [arcmin] (formal 1-sigma fit error)
SNR: 9.03794023738933
Angular difference between Flight and Ground position is 1.944458 arcmin
Partial Coding Fraction: 0.05126953 [ including projection effects ]
Duration
T90: 47.6800000071526 +/- 25.1527328240056
Measured from: 0.0559999942779541
to: 47.7360000014305 [s; relative to TRIGTIME]
T50: 19.5839999914169 +/- 26.050142408082
Measured from: 0.439999997615814
to: 20.0239999890327 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0920000076293945
to: 0.907999992370605 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0719999670982361
to: 50.5519999861717 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.684483 1.186935 0.574810 0.159416
0.206261 0.211586 0.188615 0.161683 [error]
Peak 0.176770 0.297010 0.396870 0.137489
0.043998 0.047494 0.048207 0.032619 [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 3.47e-07 4.82e-07 4.95e-07 9.26e-07 1.62e-06 2.26e-06 erg/cm2
Error 1.17e-07 1.18e-07 1.70e-07 6.10e-07 4.29e-07 8.14e-07 erg/cm2
Peak flux Power-law 2.56e-04 3.65e-03 3.41e-02 3.65e+00 1.52e-01 3.65e+00 ph/cm2/s
Error 1.56e-04 1.69e-03 1.65e-02 1.05e+00 6.93e-02 1.07e+00 ph/cm2/s
Fluence Cutoff-PL 1.67e-07 7.34e-07 4.75e-07 1.67e-08 1.39e-06 1.39e-06 erg/cm2
Error 1.32e-07 1.86e-07 2.53e-07 -------- 3.84e-07 3.87e-07 erg/cm2
Peak flux Cutoff-PL 4.06e-01 4.71e-01 1.61e-01 1.56e-01 1.34e+00 1.63e+00 ph/cm2/s
Error 6.97e-01 4.20e-01 7.02e-01 1.41e-01 1.20e+00 3.99e+00 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 1.960 0.376 - - 3.48e-03 9.43e-04 65.470 57
CPL -3.303 -0.073 44.9 7.5 2.27e+00 4.22e+03 53.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.244 0.235 - - 6.74e-02 1.05e-02 61.400 57
CPL -1.189 1.842 79.0 22.4 7.00e-01 2.55e+00 51.980 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: 0.640000 sec.
T50 in the 50-300 keV band: 0.384000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 50.624 -0.072 50.552
T90 47.680 0.056 47.736
T50 19.584 0.440 20.024
Peak 1.000 -0.092 0.908
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.0188 70.1111 0.0213 55.2709 10.0366 3.1859843 9.038 TRIG_00765130
Foreground time interval of the image:
-0.040 52.392 (delta_t = 52.432 [sec])
Background time interval of the image:
-239.880 -0.040 (delta_t = 239.840 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -0.072 sec. to 50.552 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95968 ( -0.359065 0.392234 )
Norm@50keV : 3.47751E-03 ( -0.000950522 0.000934739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.47 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.064508e-01
Photon flux (15-150 keV) in 50.62 sec: 0.512376 ( -0.127395 0.128223 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61962e-06 ( -4.24661e-07 4.3406e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.072 sec. to 50.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.30326 ( 3.81184 3.66575 )
Epeak [keV] : 44.8642 ( -6.33304 8.63068 )
Norm@50keV : 2.27107 ( -2.28789 8441.67 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9507 for 56 degrees of freedom
# Null hypothesis probability = 5.800046e-01
Photon flux (15-150 keV) in 50.62 sec: 0.445945 ( -0.122889 0.129507 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39089e-06 ( -3.65795e-07 4.01338e-07 ) ergs/cm2
Band function
Time interval is from -0.072 sec. to 50.552 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 11.7342 (-2.01402 2.40814)
R^2/D10^2 : 0.153032 (-0.0799259 0.159185)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.83 using 59 PHA bins.
# Reduced chi-squared = 0.9445 for 57 degrees of freedom
# Null hypothesis probability = 5.946195e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.251e-07 9.615e-08
25- 50 6.898e-07 2.397e-07
50-150 5.624e-07 3.117e-07
15-150 1.477e-06 5.115e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.2957 (-27.6007 65.9969)
Norm : 2.68997 (-0.814939 1.06127)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.15 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.291859e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.478e-07 1.159e-07
25- 50 5.474e-07 2.405e-07
50-150 6.825e-07 5.278e-07
15-150 1.578e-06 7.241e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.162865 (0.822496 -0.162865)
R1^2/D10^2 : 1.08597E+15 (-1.08597e+15 -1.08597e+15)
kT2 [keV] : 11.7345 (-2.01425 2.40791)
R2^2/D10^2 : 0.153018 (-0.0799143 0.159196)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.83 using 59 PHA bins.
# Reduced chi-squared = 0.9788 for 55 degrees of freedom
# Null hypothesis probability = 5.192487e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24350 ( -0.236978 0.233637 )
Norm@50keV : 6.74481E-02 ( -0.0105253 0.0104937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.40 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.212240e-01
Photon flux (15-150 keV) in 1 sec: 0.151746 ( 0.008813 0.147383 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76254e-07 ( -1.06851e-07 1.07031e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.18883 ( -2.19606 1.48775 )
Epeak [keV] : 79.0023 ( -12.9111 31.8091 )
Norm@50keV : 0.700178 ( -0.704237 4.40569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.98 using 59 PHA bins.
# Reduced chi-squared = 0.9281 for 56 degrees of freedom
# Null hypothesis probability = 6.279074e-01
Photon flux (15-150 keV) in 1 sec: 1.33739 ( -1.33739 1.0617 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.52349e-07 ( -1.13521e-07 1.12719e-07 ) ergs/cm2
Band function
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 19.7950 (-2.64351 3.18993)
R^2/D10^2 : 0.419214 (-0.170509 0.264872)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9120 for 57 degrees of freedom
# Null hypothesis probability = 6.631583e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.180e-08 8.885e-09
25- 50 1.573e-07 3.635e-08
50-150 4.562e-07 1.218e-07
15-150 6.453e-07 1.355e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-45.9795 -200)
Norm : 34.3742 (-5.36627 5.36627)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.269886e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.560e-08 4.950e-08
25- 50 1.647e-07 9.300e-08
50-150 3.611e-07 2.025e-07
15-150 6.114e-07 3.432e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.11558 (-3.12642 -3.12642)
R1^2/D10^2 : 66.6341 (-60.9048 -60.9048)
kT2 [keV] : 20.2678 (-2.87707 -20.2874)
R2^2/D10^2 : 0.380681 (-0.379324 0.265642)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.37 using 59 PHA bins.
# Reduced chi-squared = 0.9339 for 55 degrees of freedom
# Null hypothesis probability = 6.142809e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.568e-08 1.807e-08
25- 50 1.533e-07 4.734e-08
50-150 4.596e-07 1.281e-07
15-150 6.586e-07 1.596e-07
Plot creation:
Sat Jul 29 12:23:16 EDT 2017