batgrbproduct analysis for trigger=802999
batgrbproduct Analysis for Trigger=802999
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 Jan 3 14:51:31 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger802999/GCN5_download_cron
======================================================================
Trigger: 00802999 Segment: 000
BAT Trigger Time: 536601004.544 [s; MET]
Trigger Stop: 536601005.568 [s; MET]
UTC: 2018-01-02T15:49:44.290400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 203.115129995838 Dec: 62.1481848328947 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.37
Image Trigger?: NO
Rate S/N Ratio: 11.8321595661992 [ if not an image trigger ]
Image S/N Ratio: 7.37
Flight Position: [ source = BAT ]
RA: 203.115129995838 Dec: 62.1481848328947 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 203.078350843807 Dec: 62.160572473681 [deg; J2000]
{ 13h 32m 18.8s , +62d 09' 38.1" }
+/- 1.46185006803731 [arcmin] (estimated 90% radius based on SNR)
+/- 0.834857272635061 [arcmin] (formal 1-sigma fit error)
SNR: 17.6824689964329
Angular difference between Flight and Ground position is 1.270781 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 10.8479999303818 +/- 1.72179558501115
Measured from: -6.0919998884201
to: 4.75600004196167 [s; relative to TRIGTIME]
T50: 3.96799999475479 +/- 1.85109692695779
Measured from: -0.759999930858612
to: 3.20800006389618 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.799999952316284
to: 1.79999995231628 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.6240000128746
to: 6.29999995231628 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.266545 0.264508 0.128770 0.033154
0.020811 0.021659 0.018284 0.014919 [error]
Peak 0.029292 0.044941 0.041533 0.011054
0.005669 0.006097 0.005465 0.004227 [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 7.92e-08 1.07e-07 1.06e-07 1.89e-07 3.53e-07 4.81e-07 erg/cm2
Error 1.06e-08 9.93e-09 1.77e-08 6.30e-08 4.00e-08 8.20e-08 erg/cm2
Peak flux Power-law 3.22e-01 3.29e-01 2.37e-01 2.74e-01 9.95e-01 1.16e+00 ph/cm2/s
Error 7.51e-02 4.84e-02 4.41e-02 1.03e-01 1.40e-01 1.70e-01 ph/cm2/s
Fluence Cutoff-PL 7.85e-08 1.08e-07 1.06e-07 1.55e-07 3.50e-07 4.47e-07 erg/cm2
Error 1.14e-08 1.21e-08 1.84e-08 9.98e-08 4.58e-08 1.20e-07 erg/cm2
Peak flux Cutoff-PL 2.80e-01 3.52e-01 2.53e-01 1.30e-01 9.66e-01 1.01e+00 ph/cm2/s
Error 9.59e-02 5.96e-02 5.16e-02 1.51e-01 1.48e-01 2.22e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.80e-01 3.53e-01 2.52e-01 1.58e-01 9.65e-01 1.05e+00 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 2.012 0.184 - - 2.75e-03 3.30e-04 51.540 57
CPL 1.910 0.480 37.3 0.0 3.15e-03 0.00e+00 51.470 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.473 0.243 - - 8.03e-03 1.18e-03 48.090 57
CPL 0.724 1.135 86.2 -28.2 1.90e-02 3.90e-02 46.680 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: 2.688000 sec.
T50 in the 50-300 keV band: 1.216000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.924 -7.624 6.300
T90 10.848 -6.092 4.756
T50 3.968 -0.760 3.208
Peak 1.000 0.800 1.800
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
203.0784 +62.1606 0.0109 19.0 -34.2 0.7247 17.7 TRIG_00802999
------------------------------------------
Foreground time interval of the image:
-7.624 6.300 (delta_t = 13.924 [sec])
Background time interval of the image:
-60.544 -7.624 (delta_t = 52.920 [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 -7.624 sec. to 6.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01220 ( -0.179638 0.189072 )
Norm@50keV : 2.75058E-03 ( -0.000333758 0.000325568 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 0.9042 for 57 degrees of freedom
# Null hypothesis probability = 6.793160e-01
Photon flux (15-150 keV) in 13.92 sec: 0.414918 ( -0.0383481 0.0383627 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.53326e-07 ( -3.95899e-08 4.03837e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.624 sec. to 6.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91030 ( -0.734409 0.224665 )
Epeak [keV] : 37.3363 ( )
Norm@50keV : 3.14656E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9191 for 56 degrees of freedom
# Null hypothesis probability = 6.468876e-01
Photon flux (15-150 keV) in 13.92 sec: 0.413017 ( -0.040009 0.039562 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.49542e-07 ( -4.6362e-08 4.51718e-08 ) ergs/cm2
Band function
Time interval is from -7.624 sec. to 6.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.91025 ( 1.83948 0.666692 )
beta : -10.00000 ( 10 2.13163e-14 )
Epeak [keV] : 37.3984 ( -28.0496 -37.3984 )
Norm@50keV : 3.14545E-03 ( -0.000289468 0.00508527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9358 for 55 degrees of freedom
# Null hypothesis probability = 6.103927e-01
Photon flux (15-150 keV) in 13.92 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] : 9.55035 (-1.06766 1.22243)
R^2/D10^2 : 0.223438 (-0.083068 0.130431)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.68 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 57 degrees of freedom
# Null hypothesis probability = 2.121891e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.678e-08 9.306e-09
25- 50 1.321e-07 1.485e-08
50-150 6.025e-08 1.671e-08
15-150 2.491e-07 2.909e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.9436 (-17.8486 28.6158)
Norm : 2.05646 (-0.306478 0.360488)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9356 for 57 degrees of freedom
# Null hypothesis probability = 6.134899e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.307e-08 8.916e-09
25- 50 1.148e-07 1.169e-08
50-150 1.426e-07 3.523e-08
15-150 3.305e-07 4.273e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.92667 (-1.76652 1.60597)
R1^2/D10^2 : 1.06368 (-0.60804 1.28266)
kT2 [keV] : 22.2701 (-7.20032 15.1309)
R2^2/D10^2 : 6.25358E-03 (-0.00521624 0.0239577)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.70 using 59 PHA bins.
# Reduced chi-squared = 0.9763 for 55 degrees of freedom
# Null hypothesis probability = 5.245358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.583e-08 2.973e-08
25- 50 1.082e-07 3.341e-08
50-150 1.626e-07 8.896e-08
15-150 3.466e-07 1.342e-07
Peak spectrum fit
Power-law model
Time interval is from 0.800 sec. to 1.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47268 ( -0.239999 0.246964 )
Norm@50keV : 8.03179E-03 ( -0.00118495 0.00117121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.09 using 59 PHA bins.
# Reduced chi-squared = 0.8437 for 57 degrees of freedom
# Null hypothesis probability = 7.936034e-01
Photon flux (15-150 keV) in 1 sec: 0.995497 ( -0.1404 0.140499 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.65449e-08 ( -1.24423e-08 1.26448e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.800 sec. to 1.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.724365 ( -1.35878 0.910265 )
Epeak [keV] : 86.1981 ( -29.8221 -86.1795 )
Norm@50keV : 1.90355E-02 ( -0.0118127 0.0662458 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.68 using 59 PHA bins.
# Reduced chi-squared = 0.8335 for 56 degrees of freedom
# Null hypothesis probability = 8.081685e-01
Photon flux (15-150 keV) in 1 sec: 0.965717 ( -0.14886 0.147283 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29165e-08 ( -1.32865e-08 1.36943e-08 ) ergs/cm2
Band function
Time interval is from 0.800 sec. to 1.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.805832 ( 0.804841 1.55547 )
beta : -2.16440 ( 2.35142 3.96366 )
Epeak [keV] : 89.9603 ( -90.0871 -90.0871 )
Norm@50keV : 1.73793E-02 ( -0.0101846 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.69 using 59 PHA bins.
# Reduced chi-squared = 0.8488 for 55 degrees of freedom
# Null hypothesis probability = 7.799928e-01
Photon flux (15-150 keV) in 1 sec: 0.965132 ( ) 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] : 15.6867 (-2.29767 2.7503)
R^2/D10^2 : 0.100649 (-0.0432672 0.0732522)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9155 for 57 degrees of freedom
# Null hypothesis probability = 6.560835e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.143e-09 1.449e-09
25- 50 2.127e-08 4.715e-09
50-150 3.631e-08 1.006e-08
15-150 6.272e-08 1.244e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-83.3021 -199.363)
Norm : 4.08570 (-0.570095 0.570762)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.56 using 59 PHA bins.
# Reduced chi-squared = 0.8344 for 57 degrees of freedom
# Null hypothesis probability = 8.091392e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.017e-08 5.775e-09
25- 50 1.957e-08 1.092e-08
50-150 4.292e-08 2.386e-08
15-150 7.267e-08 4.031e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.25667 (-1.30569 2.77461)
R1^2/D10^2 : 189.086 (-200.054 1.42009e+06)
kT2 [keV] : 17.4136 (-2.79481 4.03023)
R2^2/D10^2 : 6.66809E-02 (-0.0357837 0.063048)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7697 for 55 degrees of freedom
# Null hypothesis probability = 8.944073e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.856e-09 3.506e-09
25- 50 1.867e-08 5.165e-09
50-150 4.022e-08 1.367e-08
15-150 6.775e-08 1.605e-08
Plot creation:
Wed Jan 3 15:13:56 EST 2018