batgrbproduct Analysis for Trigger=663490
Analysis Summary
Special note:
- During this time when the CZT bias voltage is at -150v (not the normal -200v; GCN Circ. 18562),
the energy scale in the plots below and in the data from the Quicklook and HEASARC sites
is somewhat off from the proper calibration.
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 Nov 15 06:25:51 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger663490/GCN5_download_cron
======================================================================
Trigger: 00663490 Segment: 000
BAT Trigger Time: 469187989.568 [s; MET]
Trigger Stop: 469187990.08 [s; MET]
UTC: 2015-11-14T09:59:34.155100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 120.937400376558 Dec: -61.0422350757683 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.86
Image Trigger?: NO
Rate S/N Ratio: 14.6287388383278 [ if not an image trigger ]
Image S/N Ratio: 7.86
Flight Position: [ source = BAT ]
RA: 120.937400376558 Dec: -61.0422350757683 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 120.947213789916 Dec: -61.0327905303238 [deg; J2000]
{ 08h 03m 47.3s , -61d 01' 58.0" }
+/- 1.7641297212892 [arcmin] (estimated 90% radius based on SNR)
+/- 0.791452411749649 [arcmin] (formal 1-sigma fit error)
SNR: 13.5186065185786
Angular difference between Flight and Ground position is 0.634359 arcmin
Partial Coding Fraction: 0.3046875 [ including projection effects ]
Duration
T90: 4.85599994659424 +/- 0.846990032594533
Measured from: -3.76799988746643
to: 1.08800005912781 [s; relative to TRIGTIME]
T50: 2.567999958992 +/- 1.23476314762281
Measured from: -1.94399988651276
to: 0.624000072479248 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0559999942779541
to: 0.944000005722046 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.25999999046326
to: 1.25199997425079 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.233258 0.268702 0.111486 0.046863
0.028664 0.029967 0.024770 0.022429 [error]
Peak 0.111871 0.115543 0.056449 0.024038
0.013750 0.014499 0.011443 0.009959 [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 9.33e-08 1.16e-07 1.05e-07 1.65e-07 3.71e-07 4.80e-07 erg/cm2
Error 1.72e-08 1.53e-08 2.42e-08 7.50e-08 5.61e-08 1.03e-07 erg/cm2
Peak flux Power-law 1.36e+00 9.39e-01 4.24e-01 2.66e-01 2.86e+00 2.99e+00 ph/cm2/s
Error 2.73e-01 1.30e-01 9.71e-02 1.15e-01 4.01e-01 4.13e-01 ph/cm2/s
Fluence Cutoff-PL 9.05e-08 1.21e-07 1.04e-07 9.03e-08 3.61e-07 4.06e-07 erg/cm2
Error 1.91e-08 2.07e-08 2.69e-08 1.21e-07 6.29e-08 1.37e-07 erg/cm2
Peak flux Cutoff-PL 1.30e+00 9.87e-01 4.27e-01 1.55e-01 2.82e+00 2.87e+00 ph/cm2/s
Error 3.19e-01 1.79e-01 1.05e-01 1.91e-01 4.15e-01 4.75e-01 ph/cm2/s
Fluence Band 8.76e-08 1.24e-07 1.00e-07 1.22e-07 3.60e-07 4.35e-07 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 2.143 0.252 - - 7.22e-03 1.21e-03 57.970 57
CPL 1.794 0.767 25.0 0.0 1.15e-02 0.00e+00 57.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.147 0.261 - - 1.77e-02 3.09e-03 49.900 57
CPL 1.726 0.919 28.1 0.0 3.08e-02 0.00e+00 49.500 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 5.512 -4.260 1.252
T90 4.856 -3.768 1.088
T50 2.568 -1.944 0.624
Peak 1.000 -0.056 0.944
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
120.9472 -61.0328 0.0142 48.8 -173.8 0.7247 13.5 TRIG_00663490
------------------------------------------
Foreground time interval of the image:
-4.260 1.252 (delta_t = 5.512 [sec])
Background time interval of the image:
-239.367 -145.048 (delta_t = 94.319 [sec])
-143.568 -4.260 (delta_t = 139.308 [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 -4.260 sec. to 1.252 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14312 ( -0.241303 0.262108 )
Norm@50keV : 7.21813E-03 ( -0.00123422 0.00119304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.97 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.392058e-01
Photon flux (15-150 keV) in 5.512 sec: 1.16038 ( -0.152839 0.15298 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.71352e-07 ( -5.5658e-08 5.6627e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.260 sec. to 1.252 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79409 ( -1.2684 0.265314 )
Epeak [keV] : 24.9628 ( )
Norm@50keV : 1.14619E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.61 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.154911e-01
Photon flux (15-150 keV) in 5.512 sec: 1.14666 ( -0.157932 0.15743 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60881e-07 ( -6.29322e-08 6.29603e-08 ) ergs/cm2
Band function
Time interval is from -4.260 sec. to 1.252 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.79373 ( -4.22785 0.663479 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 24.9736 ( -12.9126 -24.9736 )
Norm@50keV : 1.14647E-02 ( -0.00458247 0.0522518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.61 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 55 degrees of freedom
# Null hypothesis probability = 3.789500e-01
Photon flux (15-150 keV) in 5.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59503e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.29988 (-1.31904 1.53331)
R^2/D10^2 : 0.703378 (-0.31922 0.585842)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.81 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 57 degrees of freedom
# Null hypothesis probability = 1.357631e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.634e-08 1.525e-08
25- 50 1.483e-07 2.682e-08
50-150 6.248e-08 2.178e-08
15-150 2.771e-07 5.181e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.2142 (-17.0026 28.9676)
Norm : 6.29129 (-1.35103 1.72652)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.07 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.356628e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.587e-08 1.491e-08
25- 50 1.273e-07 2.028e-08
50-150 1.349e-07 4.840e-08
15-150 3.480e-07 6.165e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.13399 (-4.12681 1.8775)
R1^2/D10^2 : 1.67598 (-0.95084 5.68627)
kT2 [keV] : 28.7427 (-25.7533 155.313)
R2^2/D10^2 : 5.09404E-03 (-0.00486839 0.175061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Null hypothesis probability = 3.429199e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.072e-08 3.375e-08
25- 50 1.319e-07 5.533e-08
50-150 1.531e-07 8.751e-08
15-150 3.658e-07 1.600e-07
Peak spectrum fit
Power-law model
Time interval is from -0.056 sec. to 0.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14726 ( -0.250305 0.272364 )
Norm@50keV : 1.77428E-02 ( -0.00314251 0.00303254 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.90 using 59 PHA bins.
# Reduced chi-squared = 0.8754 for 57 degrees of freedom
# Null hypothesis probability = 7.362309e-01
Photon flux (15-150 keV) in 1 sec: 2.85832 ( -0.400574 0.401065 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65687e-07 ( -2.58163e-08 2.61805e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.056 sec. to 0.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72558 ( -1.46595 0.372244 )
Epeak [keV] : 28.0928 ( )
Norm@50keV : 3.08089E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
# Reduced chi-squared = 0.8839 for 56 degrees of freedom
# Null hypothesis probability = 7.178485e-01
Photon flux (15-150 keV) in 1 sec: 2.81964 ( -0.41669 0.41365 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6082e-07 ( -2.8586e-08 1.457e-08 ) ergs/cm2
Band function
Time interval is from -0.056 sec. to 0.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43937 ( 1.31709 1.31709 )
beta : -2.58812 ( 2.63684 0.705978 )
Epeak [keV] : 32.3429 ( -33.4364 26.8281 )
Norm@50keV : 4.58833E-02 ( -0.0265772 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.19 using 59 PHA bins.
# Reduced chi-squared = 0.8944 for 55 degrees of freedom
# Null hypothesis probability = 6.950422e-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] : 10.1377 (-1.40214 1.5781)
R^2/D10^2 : 1.25642 (-0.550706 0.995133)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.69 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.132568e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.642e-08 6.950e-09
25- 50 6.696e-08 1.164e-08
50-150 3.635e-08 1.292e-08
15-150 1.297e-07 2.357e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.1725 (-17.3751 30.1019)
Norm : 15.3927 (-3.42448 4.32913)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.78 using 59 PHA bins.
# Reduced chi-squared = 0.8733 for 57 degrees of freedom
# Null hypothesis probability = 7.402548e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.824e-08 7.405e-09
25- 50 5.701e-08 9.620e-09
50-150 6.133e-08 2.304e-08
15-150 1.566e-07 2.860e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.87325 (-1.29853 1.88892)
R1^2/D10^2 : 162.008 (-148.428 12640.1)
kT2 [keV] : 12.1896 (-2.08226 3.67705)
R2^2/D10^2 : 0.532272 (-0.347142 0.463803)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.59 using 59 PHA bins.
# Reduced chi-squared = 0.8835 for 55 degrees of freedom
# Null hypothesis probability = 7.163740e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.979e-08 1.813e-08
25- 50 5.656e-08 2.228e-08
50-150 4.846e-08 2.346e-08
15-150 1.448e-07 6.721e-08
Plot creation:
Sun Nov 15 06:31:38 EST 2015