batgrbproduct analysis for trigger=824063
batgrbproduct Analysis for Trigger=824063
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 v2.46
Process Start Time (local time): Wed Apr 11 15:19:52 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger824063/GCN5_download_cron
======================================================================
Trigger: 00824063 Segment: 000
BAT Trigger Time: 545040200 [s; MET]
Trigger Stop: 545040296 [s; MET]
UTC: 2018-04-10T08:02:59.237600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 95.981565817236 Dec: 12.8078803516501 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.52
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.52
Flight Position: [ source = BAT ]
RA: 95.981565817236 Dec: 12.8078803516501 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 95.9738673781194 Dec: 12.8042177040524 [deg; J2000]
{ 06h 23m 53.7s , +12d 48' 15.2" }
+/- 1.94006137109915 [arcmin] (estimated 90% radius based on SNR)
+/- 0.766641128160313 [arcmin] (formal 1-sigma fit error)
SNR: 11.8019406162854
Angular difference between Flight and Ground position is 0.501168 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 100.743999958038 +/- 13.7610770828814
Measured from: 27.2360000610352
to: 127.980000019073 [s; relative to TRIGTIME]
T50: 47.9759999513626 +/- 10.6413833243515
Measured from: 41.5080001354218
to: 89.4840000867844 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 25.7039999961853
to: 26.7039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.1640000343323
to: 153.667999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.820435 1.174084 1.117061 0.148256
0.085191 0.088063 0.074811 0.062319 [error]
Peak 0.007427 0.030714 0.038231 0.013727
0.007889 0.008607 0.007934 0.006391 [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 2.85e-07 5.39e-07 7.85e-07 2.44e-06 2.23e-06 4.05e-06 erg/cm2
Error 3.82e-08 4.37e-08 7.33e-08 4.96e-07 1.81e-07 5.46e-07 erg/cm2
Peak flux Power-law 1.31e-01 1.99e-01 2.27e-01 4.93e-01 7.04e-01 1.05e+00 ph/cm2/s
Error 7.87e-02 7.52e-02 5.96e-02 2.79e-01 1.98e-01 3.01e-01 ph/cm2/s
Fluence Cutoff-PL 2.56e-07 5.65e-07 8.21e-07 1.20e-06 2.15e-06 2.84e-06 erg/cm2
Error 4.74e-08 5.20e-08 8.36e-08 8.73e-07 1.95e-07 8.81e-07 erg/cm2
Peak flux Cutoff-PL 9.92e-02 2.08e-01 2.55e-01 2.18e-01 6.83e-01 7.80e-01 ph/cm2/s
Error 1.02e-01 8.67e-02 8.12e-02 3.81e-01 2.02e-01 3.59e-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 1.456 0.129 - - 1.81e-03 1.36e-04 47.440 57
CPL 0.908 0.570 104.7 443.4 3.33e-03 2.27e-03 44.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.813 0.467 - - 6.13e-03 1.78e-03 66.950 57
CPL -0.186 2.269 129.4 0.0 1.65e-02 1.64e-01 66.190 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: 50.176000 sec.
T50 in the 50-300 keV band: 27.840000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 128.504 25.164 153.668
T90 100.744 27.236 127.980
T50 47.976 41.508 89.484
Peak 1.000 25.704 26.704
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
95.9739 +12.8042 0.0163 33.6 155.9 2.7555 11.8 TRIG_00824063
------------------------------------------
Foreground time interval of the image:
25.164 105.101 (delta_t = 79.937 [sec])
Background time interval of the image:
-15.899 25.164 (delta_t = 41.063 [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 25.164 sec. to 153.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45586 ( -0.12916 0.129201 )
Norm@50keV : 1.81261E-03 ( -0.000135869 0.000135606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 57 degrees of freedom
# Null hypothesis probability = 8.125734e-01
Photon flux (15-150 keV) in 128.5 sec: 0.223706 ( -0.0173846 0.017426 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22648e-06 ( -1.80094e-07 1.80973e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.164 sec. to 153.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.908114 ( -0.608076 0.532524 )
Epeak [keV] : 104.666 ( -30.22 856.582 )
Norm@50keV : 3.33482E-03 ( -0.00146407 0.00306871 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7922 for 56 degrees of freedom
# Null hypothesis probability = 8.691256e-01
Photon flux (15-150 keV) in 128.5 sec: 0.217774 ( -0.018421 0.018347 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15374e-06 ( -1.95461e-07 1.95436e-07 ) ergs/cm2
Band function
Time interval is from 25.164 sec. to 153.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.903508 ( -0.338322 0.651729 )
beta : -2.16537 ( 2.10694 3.43927 )
Epeak [keV] : 104.564 ( -40.1236 734.29 )
Norm@50keV : 3.34255E-03 ( -0.00149973 0.00330451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.33 using 59 PHA bins.
# Reduced chi-squared = 0.8059 for 55 degrees of freedom
# Null hypothesis probability = 8.479264e-01
Photon flux (15-150 keV) in 128.5 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] : 16.5372 (-1.41192 1.57683)
R^2/D10^2 : 1.83762E-02 (-0.00505409 0.0068105)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.55 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 57 degrees of freedom
# Null hypothesis probability = 9.293915e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.325e-07 1.883e-08
25- 50 5.732e-07 6.110e-08
50-150 1.109e-06 1.529e-07
15-150 1.815e-06 1.748e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.1519 -200)
Norm : 0.925553 (-0.0687354 0.0687354)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.06 using 59 PHA bins.
# Reduced chi-squared = 0.8256 for 57 degrees of freedom
# Null hypothesis probability = 8.232792e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.962e-07 2.596e-08
25- 50 5.697e-07 5.442e-08
50-150 1.250e-06 4.241e-07
15-150 2.115e-06 5.371e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.87171 (-1.36641 1.94189)
R1^2/D10^2 : 0.700095 (-0.507649 2.43908)
kT2 [keV] : 20.6631 (-2.54469 3.75927)
R2^2/D10^2 : 7.57003E-03 (-0.00356908 0.00479207)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.68 using 59 PHA bins.
# Reduced chi-squared = 0.7759 for 55 degrees of freedom
# Null hypothesis probability = 8.871708e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.760e-07 1.201e-07
25- 50 5.225e-07 1.318e-07
50-150 1.282e-06 2.428e-07
15-150 2.080e-06 3.649e-07
Peak spectrum fit
Power-law model
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.812881 ( -0.502505 0.431916 )
Norm@50keV : 6.13048E-03 ( -0.00181347 0.00173991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.95 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.725673e-01
Photon flux (15-150 keV) in 1 sec: 0.704330 ( -0.196732 0.200054 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.12542e-08 ( -1.90156e-08 1.91201e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.185777 ( -3.28729 1.25143 )
Epeak [keV] : 129.360 ( -129.437 -129.437 )
Norm@50keV : 1.65137E-02 ( -0.0164966 0.310909 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.19 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 56 degrees of freedom
# Null hypothesis probability = 1.655732e-01
Photon flux (15-150 keV) in 1 sec: 0.683282 ( -0.199841 0.203972 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.85949e-08 ( -2.1271e-08 2.02417e-08 ) ergs/cm2
Band function
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.79976 ( -4.79976 -4.79976 )
beta : -1.20919 ( -1.613 0.70264 )
Epeak [keV] : 46.0450 ( -46.045 28.8937 )
Norm@50keV : 10.3885 ( -2.65686 1.14491e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.63 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.544334e-01
Photon flux (15-150 keV) in 1 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] : 23.9103 (-6.70956 12.4391)
R^2/D10^2 : 2.08745E-02 (-0.0149905 0.0389431)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.86 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.743705e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.122e-09 1.347e-09
25- 50 1.176e-08 7.220e-09
50-150 5.010e-08 2.863e-08
15-150 6.398e-08 3.302e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-69.8468 -200)
Norm : 2.92022 (-0.841311 0.841311)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.33 using 59 PHA bins.
# Reduced chi-squared = 1.304 for 57 degrees of freedom
# Null hypothesis probability = 6.127881e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.278e-09 4.624e-09
25- 50 1.400e-08 8.505e-09
50-150 3.071e-08 1.837e-08
15-150 5.198e-08 3.152e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 192.681 (-194.152 -194.152)
R1^2/D10^2 : 1.11825E-04 (-0.000109891 0.0419224)
kT2 [keV] : 16.5514 (-16.5461 14.1543)
R2^2/D10^2 : 5.01045E-02 (-0.039388 -0.0502149)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.62 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.32 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Reduced chi-squared = 1.188 for 55 degrees of freedom
# Null hypothesis probability = 1.547639e-01
# Null hypothesis probability = 1.608513e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.049e-09 2.382e-09
25- 50 1.322e-08 9.715e-09
50-150 5.299e-08 3.414e-08
15-150 6.926e-08 4.215e-08
Plot creation:
Wed Apr 11 15:27:51 EDT 2018