batgrbproduct Analysis for Trigger=655097
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 Sep 11 03:49:09 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger655097/GCN5_download_cron
======================================================================
Trigger: 00655097 Segment: 000
BAT Trigger Time: 463568704 [s; MET]
Trigger Stop: 463568768 [s; MET]
UTC: 2015-09-10T09:04:48.885620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 5.67522090431259 Dec: 33.4987706090102 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.08
Flight Position: [ source = BAT ]
RA: 5.67522090431259 Dec: 33.4987706090102 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 5.67746440419537 Dec: 33.4662152452305 [deg; J2000]
{ 00h 22m 42.6s , +33d 27' 58.4" }
+/- 2.33586362787781 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00909736294563 [arcmin] (formal 1-sigma fit error)
SNR: 9.05242282630047
Angular difference between Flight and Ground position is 1.956546 arcmin
Partial Coding Fraction: 0.1484375 [ including projection effects ]
Duration
T90: 112.000000059605 +/- 38.5494757277456
Measured from: 1.40000009536743
to: 113.400000154972 [s; relative to TRIGTIME]
T50: 44.6080000400543 +/- 7.878566382857
Measured from: 39.4160001277924
to: 84.0240001678467 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 82.8920000195503
to: 83.8920000195503 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5
to: 149.751999974251 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.556323 2.762756 2.037592 0.466004
0.158375 0.164064 0.144641 0.128852 [error]
Peak 0.041673 0.027565 0.040031 0.040512
0.014407 0.015697 0.014261 0.012969 [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 5.93e-07 1.14e-06 1.71e-06 5.52e-06 4.82e-06 8.96e-06 erg/cm2
Error 7.41e-08 8.52e-08 1.44e-07 1.03e-06 3.55e-07 1.13e-06 erg/cm2
Peak flux Power-law 3.38e-01 3.51e-01 2.58e-01 3.04e-01 1.06e+00 1.25e+00 ph/cm2/s
Error 3.14e-01 1.54e-01 1.36e-01 4.11e-01 3.93e-01 4.67e-01 ph/cm2/s
Fluence Cutoff-PL 5.88e-07 1.15e-06 1.72e-06 5.08e-06 4.80e-06 8.53e-06 erg/cm2
Error 8.27e-08 9.34e-08 1.52e-07 1.68e-06 3.73e-07 1.94e-06 erg/cm2
Peak flux Cutoff-PL 3.38e-01 3.51e-01 2.58e-01 3.02e-01 1.06e+00 1.25e+00 ph/cm2/s
Error 2.62e-01 1.53e-01 1.36e-01 4.58e-01 3.92e-01 8.51e-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 1.420 0.120 - - 3.27e-03 2.21e-04 53.080 57
CPL 1.417 0.299 9999.5 0.0 3.28e-03 1.25e-03 53.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.452 0.984 - - 8.64e-03 3.49e-03 53.790 57
CPL 5.851 1.054 658.5 0.0 9.55e-05 1.26e-03 48.820 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: 108.544000 sec.
T50 in the 50-300 keV band: 44.800000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 154.752 -5.000 149.752
T90 112.000 1.400 113.400
T50 44.608 39.416 84.024
Peak 1.000 82.892 83.892
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.6775 +33.4662 0.0213 37.5 121.0 2.8388 9.1 TRIG_00655097
------------------------------------------
Foreground time interval of the image:
-5.000 14.450 (delta_t = 19.450 [sec])
16.000 72.001 (delta_t = 56.001 [sec])
Background time interval of the image:
-239.000 -56.431 (delta_t = 182.568 [sec])
-55.000 -5.000 (delta_t = 50.000 [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
Multiple GTIs in the spectrum
tstart tstop
-5.000000 14.450000
16.000000 149.752000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42020 ( -0.12061 0.120065 )
Norm@50keV : 3.26732E-03 ( -0.000220755 0.000220469 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9312 for 57 degrees of freedom
# Null hypothesis probability = 6.229492e-01
Photon flux (15-150 keV) in 153.2 sec: 0.399762 ( -0.0281591 0.0282429 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81714e-06 ( -3.541e-07 3.55726e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-5.000000 14.450000
16.000000 149.752000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41719 ( -0.456021 0.141273 )
Epeak [keV] : 9999.53 ( -9999.53 -9999.53 )
Norm@50keV : 3.27873E-03 ( -0.000221588 0.00227372 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9478 for 56 degrees of freedom
# Null hypothesis probability = 5.862124e-01
Photon flux (15-150 keV) in 153.2 sec: 0.399123 ( -0.02886 0.028678 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.80118e-06 ( -3.75064e-07 3.71525e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-5.000000 14.450000
16.000000 149.752000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.494422 ( 0.519673 0.519673 )
beta : -1.50858 ( 1.50918 0.171852 )
Epeak [keV] : 38.1902 ( -38.0853 103.716 )
Norm@50keV : 6.60720E-02 ( -0.0690819 112.697 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.19 using 59 PHA bins.
# Reduced chi-squared = 0.9307 for 55 degrees of freedom
# Null hypothesis probability = 6.211118e-01
Photon flux (15-150 keV) in 153.2 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] : 15.6754 (-1.44415 1.64978)
R^2/D10^2 : 3.86369E-02 (-0.0114326 0.0157391)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 111.50 using 59 PHA bins.
# Reduced chi-squared = 1.9562 for 57 degrees of freedom
# Null hypothesis probability = 2.153032e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.020e-07 4.144e-08
25- 50 1.249e-06 1.224e-07
50-150 2.127e-06 2.880e-07
15-150 3.678e-06 3.079e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-27.1829 -200)
Norm : 1.65510 (-0.111582 0.111582)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.57 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.538005e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.315e-07 4.895e-08
25- 50 1.215e-06 1.056e-07
50-150 2.664e-06 6.097e-07
15-150 4.511e-06 7.576e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.86901 (-1.47345 1.5938)
R1^2/D10^2 : 0.208377 (-0.0848699 0.164697)
kT2 [keV] : 43.2508 (-12.8915 40.8861)
R2^2/D10^2 : 1.07166E-03 (-0.000849989 0.00210768)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.89 using 59 PHA bins.
# Reduced chi-squared = 0.8889 for 55 degrees of freedom
# Null hypothesis probability = 7.058874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.225e-07 1.037e-07
25- 50 1.269e-06 2.899e-07
50-150 3.104e-06 1.373e-06
15-150 4.895e-06 1.611e-06
Peak spectrum fit
Power-law model
Time interval is from 82.892 sec. to 83.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45244 ( -0.945573 1.0225 )
Norm@50keV : 8.64053E-03 ( -0.00383175 0.00314197 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9436 for 57 degrees of freedom
# Null hypothesis probability = 5.964254e-01
Photon flux (15-150 keV) in 1 sec: 1.06480 ( -0.389605 0.396042 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.27616e-08 ( -3.67673e-08 3.56481e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 82.892 sec. to 83.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.85119 ( -1.11251 0.994743 )
Epeak [keV] : 658.516 ( -9999.36 -9999.36 )
Norm@50keV : 9.55238E-05 ( -9.2827e-05 0.00242159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.82 using 59 PHA bins.
# Reduced chi-squared = 0.8718 for 56 degrees of freedom
# Null hypothesis probability = 7.408062e-01
Photon flux (15-150 keV) in 1 sec: 1.06417 ( -0.388538 0.39524 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.96789e-08 ( -3.24436e-08 3.91121e-08 ) ergs/cm2
Band function
Time interval is from 82.892 sec. to 83.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16769 ( 1.16822 1.16822 )
beta : -1.44422 ( 1.44648 0.942365 )
Epeak [keV] : 30.6786 ( -30.8562 -30.8562 )
Norm@50keV : 1.77030E-02 ( -0.0177227 0.379686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9779 for 55 degrees of freedom
# Null hypothesis probability = 5.210971e-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] : 23.8390 (-14.1656 -24.2066)
R^2/D10^2 : 2.36364E-02 (-0.0217149 0.400068)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.62 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.805167e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.664e-08 1.027e-08
25- 50 2.196e-09 1.542e-09
50-150 2.807e-12 4.228e-12
15-150 1.884e-08 1.139e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.334 (-199.352 -199.352)
Norm : 4.29642 (-1.56761 1.57041)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9611 for 57 degrees of freedom
# Null hypothesis probability = 5.587238e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.070e-08 6.860e-09
25- 50 2.058e-08 1.280e-08
50-150 4.513e-08 2.803e-08
15-150 7.641e-08 4.815e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.64124 (-1.23693 2.52732)
R1^2/D10^2 : 185.094 (-178.016 27508.5)
kT2 [keV] : 56.1944 (-38.8689 -57.7601)
R2^2/D10^2 : 2.22824E-03 (-0.00194181 0.0430046)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.73 using 59 PHA bins.
# Reduced chi-squared = 0.8859 for 55 degrees of freedom
# Null hypothesis probability = 7.117128e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.570e-08 9.405e-09
25- 50 6.559e-09 3.493e-09
50-150 7.059e-08 4.214e-08
15-150 9.285e-08 5.000e-08
Plot creation:
Fri Sep 11 03:54:06 EDT 2015