batgrbproduct analysis for trigger=741528
batgrbproduct Analysis for Trigger=741528
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 Mar 8 14:38:18 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger741528/GCN5_download_cron
======================================================================
Trigger: 00741528 Segment: 000
BAT Trigger Time: 510611080 [s; MET]
Trigger Stop: 510611152 [s; MET]
UTC: 2017-03-07T20:24:21.280840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 13.5352800445089 Dec: 9.53652894499694 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.12
Flight Position: [ source = BAT ]
RA: 13.5352800445089 Dec: 9.53652894499694 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 13.5104221945586 Dec: 9.53829953354605 [deg; J2000]
{ 00h 54m 02.5s , +09d 32' 17.9" }
+/- 2.50229426208396 [arcmin] (estimated 90% radius based on SNR)
+/- 1.41129293694587 [arcmin] (formal 1-sigma fit error)
SNR: 8.20471597100569
Angular difference between Flight and Ground position is 1.474687 arcmin
Partial Coding Fraction: 0.4335938 [ including projection effects ]
Duration
T90: 56.9239999651909 +/- 27.3968012429363
Measured from: 56.3120000958443
to: 113.236000061035 [s; relative to TRIGTIME]
T50: 13.2079999446869 +/- 6.19982481221156
Measured from: 65.2280001044273
to: 78.4360000491142 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 69.7239999771118
to: 70.7239999771118 [s; relative to TRIGTIME]
Total Fluence
Measured from: 55.3320000171661
to: 124.688000023365 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.837422 0.798714 0.488785 0.212203
0.084946 0.092397 0.088495 0.095076 [error]
Peak 0.052760 0.072096 0.034347 -0.012961
0.010921 0.012349 0.011454 0.011526 [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 2.57e-07 3.75e-07 4.06e-07 8.23e-07 1.29e-06 1.86e-06 erg/cm2
Error 4.35e-08 4.49e-08 8.67e-08 3.51e-07 1.98e-07 4.44e-07 erg/cm2
Peak flux Power-law 5.91e-01 4.84e-01 2.69e-01 2.20e-01 1.44e+00 1.56e+00 ph/cm2/s
Error 1.68e-01 1.01e-01 9.09e-02 1.41e-01 3.00e-01 3.38e-01 ph/cm2/s
Fluence Cutoff-PL 2.55e-07 3.81e-07 4.03e-07 6.12e-07 1.27e-06 1.65e-06 erg/cm2
Error 4.58e-08 5.63e-08 9.45e-08 6.01e-07 2.31e-07 6.23e-07 erg/cm2
Peak flux Cutoff-PL 5.46e-01 5.61e-01 2.47e-01 4.28e-02 1.39e+00 1.40e+00 ph/cm2/s
Error 1.83e-01 1.51e-01 1.34e-01 1.18e-01 3.04e-01 3.39e-01 ph/cm2/s
Fluence Band 3.90e-07 7.75e-07 8.46e-07 1.40e-06 2.49e-06 3.45e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.52e-01 5.47e-01 2.60e-01 6.25e-02 1.41e+00 1.42e+00 ph/cm2/s
Error 1.83e-01 -------- -------- -------- 3.07e-01 3.34e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.883 0.232 - - 2.02e-03 3.11e-04 41.840 57
CPL 1.744 0.769 74.9 0.0 2.45e-03 0.00e+00 41.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.849 0.372 - - 1.03e-02 2.67e-03 54.320 57
CPL 0.617 2.414 43.8 0.0 5.71e-02 0.00e+00 52.600 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: 41.344000 sec.
T50 in the 50-300 keV band: 18.944000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 69.356 55.332 124.688
T90 56.924 56.312 113.236
T50 13.208 65.228 78.436
Peak 1.000 69.724 70.724
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
13.5104 +9.5383 0.0234 33.3 -55.7 2.1235 8.2 TRIG_00741528
------------------------------------------
Foreground time interval of the image:
55.332 124.688 (delta_t = 69.356 [sec])
Background time interval of the image:
-60.000 55.332 (delta_t = 115.332 [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 55.332 sec. to 124.688 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88318 ( -0.225601 0.238973 )
Norm@50keV : 2.02492E-03 ( -0.00031524 0.000306487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.84 using 59 PHA bins.
# Reduced chi-squared = 0.7340 for 57 degrees of freedom
# Null hypothesis probability = 9.339544e-01
Photon flux (15-150 keV) in 69.36 sec: 0.288544 ( -0.0341963 0.0341964 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29112e-06 ( -1.94308e-07 2.00869e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 55.332 sec. to 124.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74351 ( -1.00722 0.530645 )
Epeak [keV] : 74.9069 ( )
Norm@50keV : 2.44799E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7457 for 56 degrees of freedom
# Null hypothesis probability = 9.215870e-01
Photon flux (15-150 keV) in 69.36 sec: 0.286754 ( -0.035735 0.017804 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26685e-06 ( -2.40471e-07 2.21106e-07 ) ergs/cm2
Band function
Time interval is from 55.332 sec. to 124.688 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.86814 ( -3.86817 -3.86817 )
beta : -1.98277 ( -0.359735 0.271779 )
Epeak [keV] : 21.7705 ( -21.734 45.1203 )
Norm@50keV : 92.3801 ( -93.4147 201.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.74 using 59 PHA bins.
# Reduced chi-squared = 0.7407 for 55 degrees of freedom
# Null hypothesis probability = 9.241991e-01
Photon flux (15-150 keV) in 69.36 sec: 0.527366 ( 6.47263 -0.057954 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48656e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.56105 (-1.36687 1.6324)
R^2/D10^2 : 0.157134 (-0.0703294 0.125277)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.574471e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.995e-07 4.432e-08
25- 50 4.649e-07 7.734e-08
50-150 2.127e-07 7.335e-08
15-150 8.771e-07 1.597e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.6154 (-27.7945 58.5216)
Norm : 1.35848 (-0.223135 0.293997)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.35 using 59 PHA bins.
# Reduced chi-squared = 0.7430 for 57 degrees of freedom
# Null hypothesis probability = 9.260991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.442e-07 4.165e-08
25- 50 4.003e-07 6.014e-08
50-150 5.585e-07 2.936e-07
15-150 1.203e-06 3.267e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.27565 (-2.0116 1.96835)
R1^2/D10^2 : 0.598549 (-0.335389 1.50816)
kT2 [keV] : 25.5160 (-11.8083 50.3355)
R2^2/D10^2 : 2.77070E-03 (-0.00222998 0.0184873)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.49 using 59 PHA bins.
# Reduced chi-squared = 0.7543 for 55 degrees of freedom
# Null hypothesis probability = 9.110560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.526e-07 1.335e-07
25- 50 3.770e-07 1.892e-07
50-150 6.209e-07 3.673e-07
15-150 1.250e-06 6.433e-07
Peak spectrum fit
Power-law model
Time interval is from 69.724 sec. to 70.724 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84918 ( -0.354603 0.390195 )
Norm@50keV : 1.02593E-02 ( -0.00271156 0.00262453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.32 using 59 PHA bins.
# Reduced chi-squared = 0.9530 for 57 degrees of freedom
# Null hypothesis probability = 5.761802e-01
Photon flux (15-150 keV) in 1 sec: 1.44157 ( -0.299502 0.299552 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.43386e-08 ( -2.40811e-08 2.53689e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 69.724 sec. to 70.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.617086 ( -3.29011 1.5379 )
Epeak [keV] : 43.7695 ( )
Norm@50keV : 5.70688E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.60 using 59 PHA bins.
# Reduced chi-squared = 0.9393 for 56 degrees of freedom
# Null hypothesis probability = 6.042763e-01
Photon flux (15-150 keV) in 1 sec: 1.38990 ( -0.30202 0.30528 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.1851e-08 ( -2.52445e-08 2.9709e-08 ) ergs/cm2
Band function
Time interval is from 69.724 sec. to 70.724 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72597 ( -6.32244 -4.72597 )
beta : -2.45182 ( -1.21024 0.6325 )
Epeak [keV] : 29.0121 ( -10.5538 6.43689 )
Norm@50keV : 422.598 ( -85.5467 10558.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.05 using 59 PHA bins.
# Reduced chi-squared = 0.9283 for 55 degrees of freedom
# Null hypothesis probability = 6.261154e-01
Photon flux (15-150 keV) in 1 sec: 1.40711 ( 5.59289 -0.32267 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46446e-08 ( -8.46376e-08 -2.46612e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.41623 (-1.92523 2.62192)
R^2/D10^2 : 0.881959 (-0.534432 1.2101)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.44 using 59 PHA bins.
# Reduced chi-squared = 0.9550 for 57 degrees of freedom
# Null hypothesis probability = 5.718416e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.556e-08 6.571e-09
25- 50 3.544e-08 1.172e-08
50-150 1.550e-08 9.223e-09
15-150 6.649e-08 2.389e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 77.0545 (-36.5917 -77.0563)
Norm : 6.93838 (-1.94706 2.60977)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.00 using 59 PHA bins.
# Reduced chi-squared = 0.9298 for 57 degrees of freedom
# Null hypothesis probability = 6.259296e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.796e-08 5.580e-09
25- 50 2.929e-08 1.288e-08
50-150 4.030e-08 3.255e-08
15-150 8.755e-08 4.154e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.11204 (-2.92203 2.25087)
R1^2/D10^2 : 1.94253 (-1.42892 6.25681)
kT2 [keV] : 23.1992 (-12.534 -23.7027)
R2^2/D10^2 : 1.57467E-02 (-0.0151374 0.45968)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.05 using 59 PHA bins.
# Reduced chi-squared = 0.9282 for 55 degrees of freedom
# Null hypothesis probability = 6.262736e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.757e-08 1.050e-08
25- 50 3.099e-08 1.803e-08
50-150 3.748e-08 2.356e-08
15-150 8.605e-08 4.486e-08
Plot creation:
Wed Mar 8 14:59:17 EST 2017