batgrbproduct Analysis for Trigger=677582
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Fri Mar 4 20:12:11 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger677582/GCN5_download_cron
======================================================================
Trigger: 00677582 Segment: 000
BAT Trigger Time: 478737624 [s; MET]
Trigger Stop: 478738000 [s; MET]
UTC: 2016-03-03T22:40:08.071940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 257.21734079521 Dec: -36.4009142002776 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.3
Flight Position: [ source = BAT ]
RA: 257.21734079521 Dec: -36.4009142002776 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 257.26018870247 Dec: -36.4670827654465 [deg; J2000]
{ 17h 09m 02.4s , -36d 28' 01.5" }
+/- 5.86191905855307 [arcmin] (estimated 90% radius based on SNR)
+/- 4.30039079446822 [arcmin] (formal 1-sigma fit error)
SNR: 2.43174841145083
Angular difference between Flight and Ground position is 4.476604 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
T50: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 376 second)
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.146365 0.251233 0.131474 0.003646
0.086317 0.075230 0.064086 0.059906 [error]
Peak 0.146365 0.251233 0.131474 0.003646
0.086317 0.075230 0.064086 0.059906 [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 5.07e-08 8.55e-08 1.10e-07 2.83e-07 3.24e-07 5.29e-07 erg/cm2
Error 3.03e-08 3.34e-08 5.88e-08 3.74e-07 1.42e-07 3.90e-07 erg/cm2
Peak flux Power-law 9.00e-03 8.34e-03 5.35e-03 5.29e-03 2.49e-02 2.80e-02 ph/cm2/s
Error 5.48e-03 3.31e-03 2.78e-03 6.46e-03 9.66e-03 1.08e-02 ph/cm2/s
Fluence Cutoff-PL 3.93e-08 9.76e-08 1.15e-07 5.38e-08 2.91e-07 3.06e-07 erg/cm2
Error 3.71e-08 4.24e-08 5.36e-08 3.26e-07 1.45e-07 3.77e-07 erg/cm2
Peak flux Cutoff-PL 6.84e-03 9.37e-03 5.75e-03 1.41e-03 2.31e-02 2.34e-02 ph/cm2/s
Error 6.68e-03 4.15e-03 4.59e-03 5.71e-03 1.04e-02 1.23e-02 ph/cm2/s
Fluence Band 3.80e-08 9.61e-08 1.28e-07 2.50e-07 3.43e-07 5.29e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 7.42e-03 9.06e-03 5.83e-03 2.22e-03 2.39e-02 2.46e-02 ph/cm2/s
Error -------- -------- 4.55e-03 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.640 0.706 - - 1.91e-04 7.91e-05 49.730 57
CPL 0.129 4.576 59.9 0.0 1.13e-03 1.14e+01 48.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.640 0.706 - - 1.91e-04 7.91e-05 49.730 57
CPL 0.129 4.599 59.9 0.0 1.13e-03 1.14e+01 48.990 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 376.000 0.000 376.000
T90 376.000 0.000 376.000
T50 376.000 0.000 376.000
Peak 376.000 0.000 376.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.2602 -36.4671 0.0795 0.1 21.2 0.5196 2.4 TRIG_00677582
------------------------------------------
Foreground time interval of the image:
0.000 131.900 (delta_t = 131.900 [sec])
133.000 183.062 (delta_t = 50.062 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63975 ( -0.675914 0.736259 )
Norm@50keV : 1.91255E-04 ( -8.06552e-05 7.75616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.419525e-01
Photon flux (15-150 keV) in 182 sec: 2.48895E-02 ( -0.00963598 0.0096925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24055e-07 ( -1.37662e-07 1.45558e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.129249 ( -7.12537 2.02626 )
Epeak [keV] : 59.9203 ( -59.9208 -59.9208 )
Norm@50keV : 1.12570E-03 ( -0.00112573 22.7285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.352747e-01
Photon flux (15-150 keV) in 182 sec: 2.30815E-02 ( -0.0105618 0.0103324 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90534e-07 ( -1.33106e-07 1.57765e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.277281 ( 0.728086 0.728086 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 61.0344 ( -39.6651 208.893 )
Norm@50keV : 9.54297E-04 ( -0.000953939 0.549784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022797e-01
Photon flux (15-150 keV) in 182 sec: 2.38555E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4265e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9251 (-4.71288 7.91951)
R^2/D10^2 : 3.67500E-03 (-0.00367524 0.0125731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8654 for 57 degrees of freedom
# Null hypothesis probability = 7.549450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 1.799e-08
25- 50 1.014e-07 6.353e-08
50-150 1.291e-07 9.093e-08
15-150 2.579e-07 1.636e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.687 (-105.866 -144.884)
Norm : 0.103251 (-0.0409569 0.0718357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 57 degrees of freedom
# Null hypothesis probability = 7.537179e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.830e-08 2.875e-08
25- 50 8.941e-08 5.553e-08
50-150 1.758e-07 1.195e-07
15-150 3.135e-07 2.007e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.86713 (-2.86712 20.2819)
R1^2/D10^2 : 0.879988 (-0.881621 10.5549)
kT2 [keV] : 15.3969 (-5.54208 -15.3964)
R2^2/D10^2 : 2.42691E-03 (-0.00215709 0.0103214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.55 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 55 degrees of freedom
# Null hypothesis probability = 7.179185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.430e-08 2.087e-08
25- 50 9.158e-08 5.480e-08
50-150 1.449e-07 9.528e-08
15-150 2.808e-07 1.618e-07
Peak spectrum fit
Power-law model
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63975 ( -0.675914 0.736259 )
Norm@50keV : 1.91255E-04 ( -8.06552e-05 7.75616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.419525e-01
Photon flux (15-150 keV) in 182 sec: 2.48895E-02 ( -0.00963598 0.0096925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24055e-07 ( -1.37662e-07 1.45558e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.129249 ( -7.12537 2.07265 )
Epeak [keV] : 59.9203 ( -59.9208 -59.9208 )
Norm@50keV : 1.12570E-03 ( -0.00112573 22.7285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.352747e-01
Photon flux (15-150 keV) in 182 sec: 2.30815E-02 ( -0.0105618 0.0103324 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90534e-07 ( -1.33106e-07 1.57765e-07 ) ergs/cm2
Band function
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.277281 ( 0.728086 0.728086 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 61.0344 ( -35.0957 208.892 )
Norm@50keV : 9.54297E-04 ( -0.000953939 0.549784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022797e-01
Photon flux (15-150 keV) in 182 sec: 2.38555E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4265e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9251 (-4.71288 7.91951)
R^2/D10^2 : 3.67500E-03 (-0.00367524 0.0125731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8654 for 57 degrees of freedom
# Null hypothesis probability = 7.549450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 1.789e-08
25- 50 1.014e-07 6.338e-08
50-150 1.291e-07 9.300e-08
15-150 2.579e-07 1.696e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.687 (-105.866 -144.884)
Norm : 0.103251 (-0.0409569 0.0718357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 57 degrees of freedom
# Null hypothesis probability = 7.537179e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.830e-08 2.907e-08
25- 50 8.941e-08 5.414e-08
50-150 1.758e-07 1.158e-07
15-150 3.135e-07 1.972e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.86713 (-2.86712 20.2819)
R1^2/D10^2 : 0.879988 (-0.881621 10.3267)
kT2 [keV] : 15.3969 (-5.54208 -15.3964)
R2^2/D10^2 : 2.42691E-03 (-0.00242691 0.0103637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.55 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 55 degrees of freedom
# Null hypothesis probability = 7.179185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.430e-08 1.978e-08
25- 50 9.158e-08 6.074e-08
50-150 1.449e-07 1.022e-07
15-150 2.808e-07 1.671e-07
Plot creation:
Fri Mar 4 20:16:33 EST 2016