batgrbproduct Analysis for Trigger=701503
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): Sun Jun 26 19:39:34 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger701503/GCN5_download_cron
======================================================================
Trigger: 00701503 Segment: 000
BAT Trigger Time: 488587247.936 [s; MET]
Trigger Stop: 488587248.96 [s; MET]
UTC: 2016-06-25T22:40:31.466540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 176.936915418812 Dec: -65.1138111609725 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.86
Image Trigger?: NO
Rate S/N Ratio: 15.3622914957372 [ if not an image trigger ]
Image S/N Ratio: 8.86
Flight Position: [ source = BAT ]
RA: 176.936915418812 Dec: -65.1138111609725 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 176.938530425409 Dec: -65.1417619960889 [deg; J2000]
{ 11h 47m 45.2s , -65d 08' 30.3" }
+/- 0.799432133793426 [arcmin] (estimated 90% radius based on SNR)
+/- 0.195894618672755 [arcmin] (formal 1-sigma fit error)
SNR: 41.8795307643476
Angular difference between Flight and Ground position is 1.677545 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 53.9679999351501 +/- 3.0554115928288
Measured from: -9.37999987602234
to: 44.5880000591278 [s; relative to TRIGTIME]
T50: 31.9599999189377 +/- 0.788821884337627
Measured from: 2.44800013303757
to: 34.4080000519753 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 35.0720000267029
to: 36.0720000267029 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.0360000133514
to: 47.4120000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.278542 2.375723 1.159768 0.252689
0.060515 0.062305 0.053668 0.045918 [error]
Peak 0.115986 0.135178 0.070352 0.016222
0.009057 0.009414 0.007882 0.005814 [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 7.91e-07 1.02e-06 9.59e-07 1.59e-06 3.30e-06 4.36e-06 erg/cm2
Error 4.89e-08 3.68e-08 5.56e-08 1.96e-07 1.26e-07 2.42e-07 erg/cm2
Peak flux Power-law 1.31e+00 1.00e+00 5.16e-01 3.81e-01 3.01e+00 3.21e+00 ph/cm2/s
Error 1.60e-01 8.14e-02 6.49e-02 9.22e-02 2.47e-01 2.60e-01 ph/cm2/s
Fluence Cutoff-PL 7.70e-07 1.03e-06 9.59e-07 1.20e-06 3.25e-06 3.97e-06 erg/cm2
Error 5.99e-08 4.42e-08 5.72e-08 4.90e-07 1.55e-07 5.14e-07 erg/cm2
Peak flux Cutoff-PL 1.26e+00 1.04e+00 5.19e-01 2.46e-01 2.97e+00 3.07e+00 ph/cm2/s
Error 1.79e-01 1.06e-01 6.90e-02 1.45e-01 2.54e-01 3.20e-01 ph/cm2/s
Fluence Band 7.39e-07 1.05e-06 9.39e-07 1.40e-06 3.23e-06 4.13e-06 erg/cm2
Error -------- -------- 5.99e-08 -------- 1.47e-07 -------- 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 2.087 0.074 - - 5.70e-03 2.34e-04 37.320 57
CPL 1.917 0.241 22.6 24.0 7.01e-03 0.00e+00 36.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.962 0.148 - - 2.04e-02 1.95e-03 52.820 57
CPL 1.634 0.572 48.9 0.0 3.12e-02 0.00e+00 51.820 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: 53.376000 sec.
T50 in the 50-300 keV band: 32.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 62.448 -15.036 47.412
T90 53.968 -9.380 44.588
T50 31.960 2.448 34.408
Peak 1.000 35.072 36.072
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
176.9385 -65.1418 0.0046 32.7 26.2 6.1947 41.9 TRIG_00701503
------------------------------------------
Foreground time interval of the image:
-15.036 47.412 (delta_t = 62.448 [sec])
Background time interval of the image:
-223.735 -15.036 (delta_t = 208.699 [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 -15.036 sec. to 47.412 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08661 ( -0.0739076 0.0750169 )
Norm@50keV : 5.70120E-03 ( -0.000234604 0.000232899 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.32 using 59 PHA bins.
# Reduced chi-squared = 0.6547 for 57 degrees of freedom
# Null hypothesis probability = 9.797210e-01
Photon flux (15-150 keV) in 62.45 sec: 0.891064 ( -0.0348367 0.0349881 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30384e-06 ( -1.25712e-07 1.26153e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.036 sec. to 47.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91669 ( -0.309168 0.173036 )
Epeak [keV] : 22.5796 ( -20.8455 27.2194 )
Norm@50keV : 7.00835E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.31 using 59 PHA bins.
# Reduced chi-squared = 0.6485 for 56 degrees of freedom
# Null hypothesis probability = 9.809005e-01
Photon flux (15-150 keV) in 62.45 sec: 0.879270 ( -0.039683 0.039629 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24931e-06 ( -1.56637e-07 1.54183e-07 ) ergs/cm2
Band function
Time interval is from -15.036 sec. to 47.412 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.61519 ( 1.57469 6.31098 )
beta : -2.17632 ( 2.20095 0.147291 )
Epeak [keV] : 30.3819 ( -31.4204 9.24338 )
Norm@50keV : 1.07964E-02 ( -0.00575449 1803.79 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.83 using 59 PHA bins.
# Reduced chi-squared = 0.6333 for 55 degrees of freedom
# Null hypothesis probability = 9.846270e-01
Photon flux (15-150 keV) in 62.45 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22629e-06 ( -3.22585e-06 -1.46814e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6754 ( )
R^2/D10^2 : 0.294302 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 201.88 using 59 PHA bins.
# Reduced chi-squared = 3.5417 for 57 degrees of freedom
# Null hypothesis probability = 4.485991e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.348e-07 3.010e-08
25- 50 1.182e-06 4.746e-08
50-150 7.433e-07 7.057e-08
15-150 2.360e-06 9.992e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.6459 (-7.21356 8.62909)
Norm : 4.31887 (-0.29454 0.321365)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.57 using 59 PHA bins.
# Reduced chi-squared = 0.7994 for 57 degrees of freedom
# Null hypothesis probability = 8.618574e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.868e-07 4.028e-08
25- 50 1.073e-06 4.215e-08
50-150 1.313e-06 1.177e-07
15-150 3.073e-06 1.243e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.55329 (-0.77068 0.77127)
R1^2/D10^2 : 1.51739 (-0.496297 0.894356)
kT2 [keV] : 23.0815 (-3.70963 5.45054)
R2^2/D10^2 : 1.02419E-02 (-0.00557907 0.0104915)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8191 for 55 degrees of freedom
# Null hypothesis probability = 8.284696e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.690e-07 6.869e-08
25- 50 1.065e-06 8.962e-08
50-150 1.428e-06 2.988e-07
15-150 3.162e-06 3.488e-07
Peak spectrum fit
Power-law model
Time interval is from 35.072 sec. to 36.072 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96204 ( -0.145135 0.150529 )
Norm@50keV : 2.03959E-02 ( -0.00196848 0.00193534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.82 using 59 PHA bins.
# Reduced chi-squared = 0.9267 for 57 degrees of freedom
# Null hypothesis probability = 6.324828e-01
Photon flux (15-150 keV) in 1 sec: 3.00719 ( -0.246778 0.246965 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87772e-07 ( -1.73567e-08 1.75258e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 35.072 sec. to 36.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63370 ( -0.635736 0.508313 )
Epeak [keV] : 48.9453 ( )
Norm@50keV : 3.11872E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.82 using 59 PHA bins.
# Reduced chi-squared = 0.9254 for 56 degrees of freedom
# Null hypothesis probability = 6.336667e-01
Photon flux (15-150 keV) in 1 sec: 2.97155 ( -0.25404 0.25385 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82569e-07 ( -1.9626e-08 1.9621e-08 ) ergs/cm2
Band function
Time interval is from 35.072 sec. to 36.072 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.173977 ( -2.3159 0.566092 )
beta : -2.16321 ( 2.1462 0.23729 )
Epeak [keV] : 30.3626 ( -11.6428 37.9987 )
Norm@50keV : 0.583755 ( -0.571955 2132.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.62 using 59 PHA bins.
# Reduced chi-squared = 0.9021 for 55 degrees of freedom
# Null hypothesis probability = 6.797181e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8201e-07 ( -1.82003e-07 -1.812e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.98799 (-1.00455 1.15393)
R^2/D10^2 : 1.38997 (-0.476434 0.706526)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.60 using 59 PHA bins.
# Reduced chi-squared = 1.537 for 57 degrees of freedom
# Null hypothesis probability = 5.687450e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.823e-08 4.020e-09
25- 50 7.007e-08 6.415e-09
50-150 3.644e-08 8.440e-09
15-150 1.347e-07 1.375e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 73.9359 (-16.8975 25.4279)
Norm : 14.4612 (-1.82517 2.15259)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9212 for 57 degrees of freedom
# Null hypothesis probability = 6.440522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.730e-08 4.360e-09
25- 50 6.021e-08 5.375e-09
50-150 8.047e-08 1.530e-08
15-150 1.780e-07 1.850e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.63465 (-1.20975 1.26511)
R1^2/D10^2 : 5.17384 (-2.34856 3.25595)
kT2 [keV] : 24.6581 (-6.56328 14.8816)
R2^2/D10^2 : 2.96414E-02 (-0.0237268 0.0715869)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.9013 for 55 degrees of freedom
# Null hypothesis probability = 6.814189e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.764e-08 9.580e-09
25- 50 6.024e-08 1.364e-08
50-150 8.602e-08 4.352e-08
15-150 1.839e-07 5.671e-08
Plot creation:
Sun Jun 26 19:43:39 EDT 2016