batgrbproduct Analysis for Trigger=704310
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): Thu Jul 14 21:07:35 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger704310/GCN5_download_cron
======================================================================
Trigger: 00704310 Segment: 000
BAT Trigger Time: 490155572.096 [s; MET]
Trigger Stop: 490155572.352 [s; MET]
UTC: 2016-07-14T02:19:15.539440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 234.461473411661 Dec: 63.8313767687476 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.24
Image Trigger?: NO
Rate S/N Ratio: 9.38083151964686 [ if not an image trigger ]
Image S/N Ratio: 7.24
Flight Position: [ source = BAT ]
RA: 234.461473411661 Dec: 63.8313767687476 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 234.489034072367 Dec: 63.8090344619505 [deg; J2000]
{ 15h 37m 57.4s , +63d 48' 32.5" }
+/- 2.73490233085655 [arcmin] (estimated 90% radius based on SNR)
+/- 1.45895265746763 [arcmin] (formal 1-sigma fit error)
SNR: 7.22629651700755
Angular difference between Flight and Ground position is 1.526209 arcmin
Partial Coding Fraction: 0.3554688 [ including projection effects ]
Duration
T90: 0.347999930381775 +/- 0.113137078246357
Measured from: 0.03600013256073
to: 0.384000062942505 [s; relative to TRIGTIME]
T50: 0.191999912261963 +/- 0.105603032047646
Measured from: 0.0600001215934753
to: 0.252000033855438 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.28600001335144
to: 0.71399998664856 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0239999890327454
to: 0.399999976158142 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.021377 0.038378 0.038163 0.014420
0.007045 0.007849 0.007110 0.006102 [error]
Peak 0.024978 0.047116 0.043948 0.014294
0.010842 0.011635 0.010699 0.009726 [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 8.08e-09 1.61e-08 2.48e-08 8.41e-08 6.94e-08 1.33e-07 erg/cm2
Error 3.21e-09 3.94e-09 6.32e-09 4.72e-08 1.59e-08 5.11e-08 erg/cm2
Peak flux Power-law 2.97e-01 3.44e-01 2.87e-01 4.05e-01 1.07e+00 1.33e+00 ph/cm2/s
Error 1.55e-01 1.11e-01 8.34e-02 2.53e-01 3.01e-01 3.53e-01 ph/cm2/s
Fluence Cutoff-PL 7.50e-09 1.66e-08 2.59e-08 5.41e-08 6.86e-08 1.04e-07 erg/cm2
Error 3.80e-09 4.50e-09 7.48e-09 -------- 1.65e-08 6.45e-08 erg/cm2
Peak flux Cutoff-PL 2.80e-01 3.49e-01 2.96e-01 3.26e-01 1.06e+00 1.25e+00 ph/cm2/s
Error 1.79e-01 1.19e-01 9.96e-02 3.49e-01 2.32e-01 4.27e-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 1.372 0.370 - - 1.90e-02 4.09e-03 61.710 57
CPL 1.022 1.672 154.8 0.0 2.77e-02 8.07e-02 61.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.260 0.468 - - 9.07e-03 2.38e-03 66.380 57
CPL 0.999 0.578 215.1 0.0 1.19e-02 4.20e-02 66.330 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 0.376 0.024 0.400
T90 0.348 0.036 0.384
T50 0.192 0.060 0.252
Peak 1.000 -0.286 0.714
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
234.4890 +63.8090 0.0266 46.6 -169.2 0.1079 7.2 TRIG_00704310
------------------------------------------
Foreground time interval of the image:
0.024 0.400 (delta_t = 0.376 [sec])
Background time interval of the image:
-96.995 0.024 (delta_t = 97.019 [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 0.024 sec. to 0.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37209 ( -0.37217 0.366912 )
Norm@50keV : 1.89816E-02 ( -0.00409253 0.00409251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.71 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.115932e-01
Photon flux (15-150 keV) in 0.376 sec: 2.29740 ( -0.523755 0.52729 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.93686e-08 ( -1.58546e-08 1.59568e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.024 sec. to 0.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02153 ( -1.80477 1.54016 )
Epeak [keV] : 154.793 ( -154.791 -154.791 )
Norm@50keV : 2.76720E-02 ( -0.0125055 0.148935 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.52 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 56 degrees of freedom
# Null hypothesis probability = 2.849329e-01
Photon flux (15-150 keV) in 0.376 sec: 2.26698 ( -0.54064 0.54076 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.85587e-08 ( -1.66478e-08 1.6347e-08 ) ergs/cm2
Band function
Time interval is from 0.024 sec. to 0.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01981 ( 0.802872 5.75092 )
beta : -1.66928 ( 1.74772 11.7381 )
Epeak [keV] : 154.237 ( -141.366 -141.366 )
Norm@50keV : 2.77226E-02 ( -0.012002 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.51 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.542690e-01
Photon flux (15-150 keV) in 0.376 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] : 18.0626 (-4.60142 6.49323)
R^2/D10^2 : 0.142738 (-0.0926615 0.25262)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.90 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.962078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.502e-09 1.622e-09
25- 50 1.624e-08 7.210e-09
50-150 3.849e-08 1.614e-08
15-150 5.823e-08 1.908e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-91.1555 -199.363)
Norm : 9.65182 (-2.09426 2.09409)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.904619e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.037e-09 5.347e-09
25- 50 1.738e-08 1.012e-08
50-150 3.813e-08 2.256e-08
15-150 6.454e-08 3.745e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.55147 (-6.09909 9.62166)
R1^2/D10^2 : 1.54739 (-1.37352 5154.51)
kT2 [keV] : 27.4519 (-10.8762 -27.524)
R2^2/D10^2 : 2.81149E-02 (-0.0277092 0.170979)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.83 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 55 degrees of freedom
# Null hypothesis probability = 2.453249e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.042e-09 3.944e-09
25- 50 1.685e-08 9.441e-09
50-150 4.471e-08 2.638e-08
15-150 6.860e-08 3.617e-08
Peak spectrum fit
Power-law model
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26041 ( -0.47952 0.455794 )
Norm@50keV : 9.06622E-03 ( -0.00238577 0.00237955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.38 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.850955e-01
Photon flux (15-150 keV) in 1 sec: 1.07413 ( -0.299572 0.302708 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.04881e-08 ( -2.48855e-08 2.50622e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999157 ( -2.19073 -1.03509 )
Epeak [keV] : 215.068 ( -245.04 -245.04 )
Norm@50keV : 1.18687E-02 ( -0.00465808 0.0793478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.33 using 59 PHA bins.
# Reduced chi-squared = 1.184 for 56 degrees of freedom
# Null hypothesis probability = 1.625958e-01
Photon flux (15-150 keV) in 1 sec: 1.06383 ( -0.309592 0.15499 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98654e-08 ( -2.56978e-08 2.54706e-08 ) ergs/cm2
Band function
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.68861 ( -4.68861 -4.68861 )
beta : -1.28362 ( -0.502408 0.4927 )
Epeak [keV] : 22.6479 ( -22.6479 191.308 )
Norm@50keV : 799.502 ( -208.684 5.09581e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.29 using 59 PHA bins.
# Reduced chi-squared = 1.205 for 55 degrees of freedom
# Null hypothesis probability = 1.415827e-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] : 20.8109 (-6.26451 9.80808)
R^2/D10^2 : 4.26928E-02 (-0.0306221 0.0994541)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.51 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 57 degrees of freedom
# Null hypothesis probability = 1.237360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.507e-09 2.234e-09
25- 50 1.792e-08 9.594e-09
50-150 5.781e-08 3.645e-08
15-150 7.924e-08 4.706e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-72.8649 -199.363)
Norm : 4.55693 (-1.21077 1.21077)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.68 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.573846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-08 6.925e-09
25- 50 2.183e-08 1.311e-08
50-150 4.787e-08 2.857e-08
15-150 8.105e-08 4.690e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.15647 (-5.37587 10.4339)
R1^2/D10^2 : 0.879909 (-0.827477 822.473)
kT2 [keV] : 30.2468 (-23.0323 -30.2644)
R2^2/D10^2 : 1.06338E-02 (-0.00992227 0.0537124)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.93 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 55 degrees of freedom
# Null hypothesis probability = 1.485331e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.918e-09 5.740e-09
25- 50 1.995e-08 1.131e-08
50-150 6.227e-08 3.656e-08
15-150 9.114e-08 4.864e-08
Plot creation:
Thu Jul 14 21:16:11 EDT 2016