batgrbproduct analysis for trigger=755873
batgrbproduct Analysis for Trigger=755873
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): Mon Jun 5 19:07:46 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger755873/GCN5_download_cron
======================================================================
Trigger: 00755873 Segment: 000
BAT Trigger Time: 518304671.68 [s; MET]
Trigger Stop: 518304679.872 [s; MET]
UTC: 2017-06-04T21:30:52.513540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 200.808261928358 Dec: 64.1979042702086 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.07
Image Trigger?: NO
Rate S/N Ratio: 66.460514593253 [ if not an image trigger ]
Image S/N Ratio: 7.07
Flight Position: [ source = BAT ]
RA: 200.808261928358 Dec: 64.1979042702086 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 200.528301799419 Dec: 64.2016255241528 [deg; J2000]
{ 13h 22m 06.8s , +64d 12' 05.9" }
+/- 6.97515789930814 [arcmin] (estimated 90% radius based on SNR)
+/- 5.96235234312951 [arcmin] (formal 1-sigma fit error)
SNR: 1.89688575531468
Angular difference between Flight and Ground position is 7.314306 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 8.19199997186661 +/-
Measured from: 0
to: 8.19199997186661 [s; relative to TRIGTIME]
T50: 8.19199997186661 +/-
Measured from: 0
to: 8.19199997186661 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 8.19199997186661 second)
Measured from: 2.98023223876953e-08
to: 8.19200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 8.19199997186661 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.106286 -0.001150 -0.030898 -0.011605
0.022941 0.024388 0.022822 0.024291 [error]
Peak 0.106286 -0.001150 -0.030898 -0.011605
0.022941 0.024388 0.022822 0.024291 [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 2.43e-08 1.08e-08 2.81e-09 9.35e-10 3.82e-08 3.91e-08 erg/cm2
Error 1.15e-08 1.06e-08 5.31e-09 4.21e-09 2.34e-08 2.48e-08 erg/cm2
Peak flux Power-law 1.01e-01 2.54e-02 3.37e-03 5.01e-04 1.30e-01 1.30e-01 ph/cm2/s
Error 4.76e-02 2.43e-02 6.05e-03 2.03e-03 6.54e-02 6.57e-02 ph/cm2/s
Fluence Cutoff-PL 3.60e-08 8.19e-09 1.71e-12 1.21e-22 4.43e-08 4.42e-08 erg/cm2
Error 1.34e-08 6.65e-09 6.10e-11 8.12e-16 1.73e-08 1.73e-08 erg/cm2
Peak flux Cutoff-PL 1.44e-01 2.26e-02 2.78e-06 1.20e-16 1.66e-01 1.66e-01 ph/cm2/s
Error 5.42e-02 2.02e-02 8.58e-05 3.63e-10 6.20e-02 6.20e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.23e-02 5.89e-04 2.52e-06 1.08e-08 3.29e-02 3.29e-02 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.918 1.373 - - 2.26e-04 3.18e-04 64.440 57
CPL 1.000 0.000 50.0 0.0 1.46e-03 0.00e+00 74.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.918 1.373 - - 2.26e-04 3.18e-04 64.440 57
CPL 1.000 0.000 50.0 0.0 1.46e-03 0.00e+00 74.330 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.192 0.000 8.192
T90 8.192 0.000 8.192
T50 8.192 0.000 8.192
Peak 8.192 0.000 8.192
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
200.5283 +64.2016 0.1019 38.2 -19.5 0.0980 1.9 TRIG_00755873
------------------------------------------
Foreground time interval of the image:
0.000 8.192 (delta_t = 8.192 [sec])
Background time interval of the image:
-113.179 -54.961 (delta_t = 58.218 [sec])
-53.680 -23.680 (delta_t = 30.000 [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 0.000 sec. to 8.192 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.91849 ( -1.09077 1.6558 )
Norm@50keV : 2.25593E-04 ( -0.000226302 0.000408716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.44 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.326178e-01
Photon flux (15-150 keV) in 8.192 sec: 0.129720 ( -0.0640505 0.0667618 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81697e-08 ( -2.0993e-08 2.5747e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.46459E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.33 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 56 degrees of freedom
# Null hypothesis probability = 5.111028e-02
Photon flux (15-150 keV) in 8.192 sec: 0.166384 0.166941 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.94354e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.10351 -5 )
beta : -9.37167 ( 9.37167 19.2841 )
Epeak [keV] : 17.8268 ( -3.54875 3.87053 )
Norm@50keV : 3329.23 ( -1284.83 59934.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.50 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 55 degrees of freedom
# Null hypothesis probability = 3.482967e-01
Photon flux (15-150 keV) in 8.192 sec: 3.28740E-02 ( 6.96713 -0.032874 ) 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] : 3.86967 (-1.0211 1.32179)
R^2/D10^2 : 4.93524 (-4.92407 20.3998)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.666653e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.125e-08 1.973e-08
25- 50 1.025e-08 7.422e-09
50-150 1.017e-10 1.393e-10
15-150 4.160e-08 2.560e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.16928 (-3.82733 8.46642)
Norm : 5.93937 (-5.97808 18.4849)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.11 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.991589e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.790e-08 1.729e-08
25- 50 1.065e-08 8.184e-09
50-150 5.719e-10 6.828e-10
15-150 3.912e-08 2.477e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.87862 (-1.02016 1.32285)
R1^2/D10^2 : 4.87903 (-4.9095 20.4125)
kT2 [keV] : 8.01127E-02 (-0.0801127 -0.0801127)
R2^2/D10^2 : 2.03374E-02 (-0.0203407 -0.0203407)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.986002e-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 0.000 sec. to 8.192 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.91849 ( -1.09077 1.6558 )
Norm@50keV : 2.25593E-04 ( -0.000226302 0.000408716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.44 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.326178e-01
Photon flux (15-150 keV) in 8.192 sec: 0.129720 ( -0.0640505 0.0667618 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81697e-08 ( -2.0993e-08 2.5747e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.46459E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.33 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 56 degrees of freedom
# Null hypothesis probability = 5.111028e-02
Photon flux (15-150 keV) in 8.192 sec: 0.166384 0.166941 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.94354e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.10351 -5 )
beta : -9.37167 ( 9.37167 5.16881 )
Epeak [keV] : 17.8268 ( -3.54875 3.87053 )
Norm@50keV : 3329.23 ( -1284.83 59934.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.50 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 55 degrees of freedom
# Null hypothesis probability = 3.482967e-01
Photon flux (15-150 keV) in 8.192 sec: 3.28740E-02 ( 6.96713 -0.032874 ) 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] : 3.86967 (-1.0211 1.32179)
R^2/D10^2 : 4.93524 (-4.92407 20.3998)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.666653e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.125e-08 1.840e-08
25- 50 1.025e-08 7.156e-09
50-150 1.017e-10 1.184e-10
15-150 4.160e-08 2.728e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.16928 (-3.82733 8.46642)
Norm : 5.93937 (-5.97808 18.4849)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.11 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.991589e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.790e-08 1.676e-08
25- 50 1.065e-08 7.082e-09
50-150 5.719e-10 6.619e-10
15-150 3.912e-08 2.550e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.87862 (-1.02016 1.32285)
R1^2/D10^2 : 4.87903 (-4.9095 20.4125)
kT2 [keV] : 8.01127E-02 (-0.0801127 -0.0801127)
R2^2/D10^2 : 2.03374E-02 (-0.0203407 -0.0203407)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.986002e-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
Plot creation:
Mon Jun 5 19:31:34 EDT 2017