batgrbproduct analysis for trigger=753110
batgrbproduct Analysis for Trigger=753110
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): Wed May 17 16:23:50 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger753110/GCN5_download_cron
======================================================================
Trigger: 00753110 Segment: 000
BAT Trigger Time: 516631779.648 [s; MET]
Trigger Stop: 516631780.672 [s; MET]
UTC: 2017-05-16T12:49:20.579320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 41.5980442407554 Dec: -55.8987916334193 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.32
Image Trigger?: NO
Rate S/N Ratio: 10.295630140987 [ if not an image trigger ]
Image S/N Ratio: 7.32
Flight Position: [ source = BAT ]
RA: 41.5980442407554 Dec: -55.8987916334193 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.5431548021064 Dec: -55.9286981536308 [deg; J2000]
{ 02h 46m 10.4s , -55d 55' 43.3" }
+/- 1.58582431228554 [arcmin] (estimated 90% radius based on SNR)
+/- 0.764855315717511 [arcmin] (formal 1-sigma fit error)
SNR: 15.7412677496974
Angular difference between Flight and Ground position is 2.574214 arcmin
Partial Coding Fraction: 0.6875 [ including projection effects ]
Duration
T90: 36.7840000391006 +/- 11.1398298412864
Measured from: -12.8959999084473
to: 23.8880001306534 [s; relative to TRIGTIME]
T50: 15.5840000510216 +/- 1.6103664296094
Measured from: 1.66400009393692
to: 17.2480001449585 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.26800000667572
to: 2.26800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.8560000061989
to: 31.216000020504 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.035362 0.795057 0.186190 0.019260
0.049288 0.049703 0.042355 0.036622 [error]
Peak 0.071449 0.056780 0.009367 0.005730
0.007877 0.007652 0.006349 0.004965 [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 3.54e-07 3.21e-07 2.00e-07 1.91e-07 9.55e-07 1.07e-06 erg/cm2
Error 3.32e-08 2.66e-08 3.43e-08 6.08e-08 8.19e-08 1.13e-07 erg/cm2
Peak flux Power-law 7.85e-01 3.93e-01 1.21e-01 4.73e-02 1.33e+00 1.35e+00 ph/cm2/s
Error 1.37e-01 6.91e-02 4.27e-02 2.96e-02 1.96e-01 2.01e-01 ph/cm2/s
Fluence Cutoff-PL 3.32e-07 3.60e-07 1.40e-07 1.50e-08 8.46e-07 8.47e-07 erg/cm2
Error 3.67e-08 3.51e-08 4.92e-08 2.90e-08 8.62e-08 9.11e-08 erg/cm2
Peak flux Cutoff-PL 7.45e-01 4.67e-01 7.78e-02 2.37e-03 1.29e+00 1.29e+00 ph/cm2/s
Error 1.50e-01 9.60e-02 5.28e-02 1.45e-02 1.93e-01 1.93e-01 ph/cm2/s
Fluence Band 3.28e-07 3.59e-07 1.40e-07 4.48e-08 8.57e-07 8.76e-07 erg/cm2
Error 3.65e-08 3.51e-08 -------- -------- -------- -------- 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 2.678 0.168 - - 1.77e-03 2.22e-04 47.680 57
CPL 1.160 0.891 18.7 11.8 1.70e-02 4.51e-02 37.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.701 0.334 - - 5.94e-03 1.62e-03 74.870 57
CPL 0.673 2.003 21.2 0.0 1.34e-01 0.00e+00 70.770 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 51.072 -19.856 31.216
T90 36.784 -12.896 23.888
T50 15.584 1.664 17.248
Peak 1.000 1.268 2.268
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
41.5432 -55.9287 0.0122 29.4 26.2 1.1907 15.7 TRIG_00753110
------------------------------------------
Foreground time interval of the image:
-19.856 10.853 (delta_t = 30.709 [sec])
Background time interval of the image:
-239.648 -89.658 (delta_t = 149.990 [sec])
-88.648 -19.856 (delta_t = 68.792 [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 -19.856 sec. to 31.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67811 ( -0.162742 0.172267 )
Norm@50keV : 1.77135E-03 ( -0.000221641 0.000222116 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.68 using 59 PHA bins.
# Reduced chi-squared = 0.8366 for 57 degrees of freedom
# Null hypothesis probability = 8.055867e-01
Photon flux (15-150 keV) in 51.07 sec: 0.389666 ( -0.0286215 0.0286346 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.55116e-07 ( -8.10992e-08 8.27661e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.856 sec. to 31.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15983 ( -1.09321 0.688612 )
Epeak [keV] : 18.7024 ( -16.8853 6.6306 )
Norm@50keV : 1.69751E-02 ( -0.0169752 0.073271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.75 using 59 PHA bins.
# Reduced chi-squared = 0.6740 for 56 degrees of freedom
# Null hypothesis probability = 9.708689e-01
Photon flux (15-150 keV) in 51.07 sec: 0.370736 ( -0.029879 0.030024 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.45786e-07 ( -8.15843e-08 9.07463e-08 ) ergs/cm2
Band function
Time interval is from -19.856 sec. to 31.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16001 ( -0.704886 1.29611 )
beta : -9.99998 ( 9.99998 19.9999 )
Epeak [keV] : 18.6971 ( -2.60428 6.63116 )
Norm@50keV : 1.69687E-02 ( -0.0169687 0.0734038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.75 using 59 PHA bins.
# Reduced chi-squared = 0.6863 for 55 degrees of freedom
# Null hypothesis probability = 9.634494e-01
Photon flux (15-150 keV) in 51.07 sec: 0.381613 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.56914e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.86557 (-0.532073 0.573091)
R^2/D10^2 : 0.770154 (-0.226626 0.326935)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.77 using 59 PHA bins.
# Reduced chi-squared = 0.9083 for 57 degrees of freedom
# Null hypothesis probability = 6.708954e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.918e-07 3.506e-08
25- 50 3.847e-07 3.618e-08
50-150 5.940e-08 1.751e-08
15-150 7.359e-07 6.562e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.4822 (-4.01687 4.96617)
Norm : 3.45669 (-0.563554 0.699806)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.84 using 59 PHA bins.
# Reduced chi-squared = 0.6638 for 57 degrees of freedom
# Null hypothesis probability = 9.763263e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.352e-07 3.120e-08
25- 50 3.562e-07 3.322e-08
50-150 1.646e-07 4.553e-08
15-150 8.559e-07 7.048e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.38364 (-1.42001 1.39503)
R1^2/D10^2 : 3.41357 (-2.09277 13.8507)
kT2 [keV] : 10.5174 (-2.42084 5.94765)
R2^2/D10^2 : 7.78768E-02 (-0.0702977 0.239738)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.48 using 59 PHA bins.
# Reduced chi-squared = 0.6815 for 55 degrees of freedom
# Null hypothesis probability = 9.659561e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.339e-07 1.756e-07
25- 50 3.555e-07 1.624e-07
50-150 1.485e-07 8.314e-08
15-150 8.379e-07 4.171e-07
Peak spectrum fit
Power-law model
Time interval is from 1.268 sec. to 2.268 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70068 ( -0.310592 0.357876 )
Norm@50keV : 5.93781E-03 ( -0.00160871 0.00163286 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.87 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.631932e-02
Photon flux (15-150 keV) in 1 sec: 1.32582 ( -0.196013 0.196091 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.3184e-08 ( -1.15597e-08 1.21273e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.268 sec. to 2.268 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.672897 ( -2.2669 1.74002 )
Epeak [keV] : 21.2355 ( )
Norm@50keV : 0.133977 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 56 degrees of freedom
# Null hypothesis probability = 8.844714e-02
Photon flux (15-150 keV) in 1 sec: 1.29121 ( -0.19236 0.19365 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.61808e-08 ( -9.7845e-09 1.1474e-08 ) ergs/cm2
Band function
Time interval is from 1.268 sec. to 2.268 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.673762 ( 1.70945 1.70945 )
beta : -10.00000 ( 10 7.83785e-07 )
Epeak [keV] : 21.2254 ( -4.50321 5.74924 )
Norm@50keV : 0.133815 ( -0.0193947 4.72525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.287 for 55 degrees of freedom
# Null hypothesis probability = 7.466261e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.64569e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.72797 (-0.994126 1.10441)
R^2/D10^2 : 3.03770 (-1.44652 2.97456)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.69 using 59 PHA bins.
# Reduced chi-squared = 1.293 for 57 degrees of freedom
# Null hypothesis probability = 6.768652e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.116e-08 4.720e-09
25- 50 2.680e-08 6.655e-09
50-150 3.840e-09 1.984e-09
15-150 5.180e-08 1.196e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.0226 (-6.69907 9.84197)
Norm : 12.7710 (-3.59058 5.40533)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.14 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 57 degrees of freedom
# Null hypothesis probability = 9.863795e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.340e-08 4.490e-09
25- 50 2.400e-08 5.990e-09
50-150 1.022e-08 5.385e-09
15-150 5.762e-08 1.289e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.18280 (-2.92671 12.3861)
R1^2/D10^2 : 38.8700 (-40.8937 -43.1985)
kT2 [keV] : 8.41099 (-1.74065 7.15014)
R2^2/D10^2 : 0.938072 (-0.956163 2.63052)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 55 degrees of freedom
# Null hypothesis probability = 8.177379e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.282e-08 1.107e-08
25- 50 2.553e-08 1.451e-08
50-150 7.316e-09 4.962e-09
15-150 5.567e-08 2.763e-08
Plot creation:
Wed May 17 16:49:52 EDT 2017