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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
337.6473 -33.1889 0.0060 43.6488 37.5777 22.7162599 32.579 TRIG_00660671
Foreground time interval of the image:
-21.620 16.829 (delta_t = 38.449 [sec])
Background time interval of the image:
-239.872 -21.620 (delta_t = 218.252 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -21.620 sec. to 127.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52493 ( -0.0370307 0.0370114 )
Norm@50keV : 1.94554E-02 ( -0.000368632 0.000368495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.10 using 59 PHA bins.
# Reduced chi-squared = 0.6509 for 57 degrees of freedom
# Null hypothesis probability = 9.809880e-01
Photon flux (15-150 keV) in 149 sec: 2.44544 ( -0.0549612 0.0551901 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.73916e-05 ( -5.25387e-07 5.2563e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.620 sec. to 127.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52347 ( -0.0384361 0.0362975 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.94844E-02 ( -0.000367566 0.00173074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.18 using 59 PHA bins.
# Reduced chi-squared = 0.6639 for 56 degrees of freedom
# Null hypothesis probability = 9.752514e-01
Photon flux (15-150 keV) in 149 sec: 2.44703 ( -0.05827 0.05229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.73938e-05 ( -5.23735e-07 5.16285e-07 ) ergs/cm2
Band function
Time interval is from -21.620 sec. to 127.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.712455 ( 0.996294 5.87017 )
beta : -1.53556 ( -0.0483707 0.0403238 )
Epeak [keV] : 43.9723 ( -43.9903 107.734 )
Norm@50keV : 7.14302E-02 ( -0.072059 1.88467e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.12 using 59 PHA bins.
# Reduced chi-squared = 0.6567 for 55 degrees of freedom
# Null hypothesis probability = 9.769764e-01
Photon flux (15-150 keV) in 149 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] : 17.8689 ( )
R^2/D10^2 : 0.141446 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 734.59 using 59 PHA bins.
# Reduced chi-squared = 12.888 for 57 degrees of freedom
# Null hypothesis probability = 1.986586e-118
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-06 5.647e-08
25- 50 6.211e-06 1.810e-07
50-150 1.437e-05 4.217e-07
15-150 2.193e-05 4.321e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-4.69772 -200)
Norm : 9.99879 (-0.188741 0.188741)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.00 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 57 degrees of freedom
# Null hypothesis probability = 1.005719e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.711e-06 7.971e-08
25- 50 7.139e-06 1.475e-07
50-150 1.566e-05 3.427e-07
15-150 2.651e-05 5.885e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.95155 (-0.517184 0.541468)
R1^2/D10^2 : 1.67924 (-0.344595 0.457805)
kT2 [keV] : 32.4431 (-2.3466 2.8818)
R2^2/D10^2 : 1.46831E-02 (-0.00366099 0.00437095)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.41 using 59 PHA bins.
# Reduced chi-squared = 0.8621 for 55 degrees of freedom
# Null hypothesis probability = 7.565444e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.191e-06 1.862e-07
25- 50 7.113e-06 2.742e-07
50-150 1.693e-05 6.854e-07
15-150 2.724e-05 8.717e-07
Peak spectrum fit
Power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42029 ( -0.154429 0.15749 )
Norm@50keV : 7.96116E-02 ( -0.00698165 0.00693836 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.83 using 59 PHA bins.
# Reduced chi-squared = 0.8391 for 57 degrees of freedom
# Null hypothesis probability = 8.013330e-01
Photon flux (15-150 keV) in 1 sec: 9.74078 ( -0.838999 0.840017 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6614e-07 ( -7.57774e-08 7.62499e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41847 ( -0.26532 0.157481 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 7.98705E-02 ( -0.0798722 0.0284313 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.85 using 59 PHA bins.
# Reduced chi-squared = 0.8545 for 56 degrees of freedom
# Null hypothesis probability = 7.723984e-01
Photon flux (15-150 keV) in 1 sec: 9.75232 ( -0.84706 0.82858 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.60553e-07 ( -7.0418e-08 8.1084e-08 ) ergs/cm2
Band function
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21717 ( 1.21719 1.21719 )
beta : -1.42024 ( -0.157493 0.154445 )
Epeak [keV] : 15.7066 ( -15.7072 -15.7072 )
Norm@50keV : 0.162290 ( -0.0895955 1.88524 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.83 using 59 PHA bins.
# Reduced chi-squared = 0.8696 for 55 degrees of freedom
# Null hypothesis probability = 7.426294e-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] : 17.2775 (-2.38562 2.70271)
R^2/D10^2 : 0.675406 (-0.254907 0.430409)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.96 using 59 PHA bins.
# Reduced chi-squared = 1.8414 for 57 degrees of freedom
# Null hypothesis probability = 1.136358e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.087e-08 6.985e-09
25- 50 1.832e-07 2.315e-08
50-150 3.924e-07 6.955e-08
15-150 6.165e-07 7.655e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-35.7 -200)
Norm : 39.8306 (-3.40175 3.40175)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9340 for 57 degrees of freedom
# Null hypothesis probability = 6.170869e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.917e-08 1.231e-08
25- 50 1.908e-07 4.340e-08
50-150 4.184e-07 1.905e-07
15-150 7.083e-07 1.828e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.99641 (-1.11392 1.35273)
R1^2/D10^2 : 19.1559 (-10.2411 24.5673)
kT2 [keV] : 31.3129 (-5.88933 9.71426)
R2^2/D10^2 : 8.12564E-02 (-0.0457479 0.0790745)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.49 using 59 PHA bins.
# Reduced chi-squared = 0.7908 for 55 degrees of freedom
# Null hypothesis probability = 8.685898e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.036e-07 4.511e-08
25- 50 1.672e-07 4.497e-08
50-150 5.264e-07 1.549e-07
15-150 7.972e-07 2.418e-07
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33406 ( -0.0468071 0.0467011 )
Norm@50keV : 4.12866E-02 ( -0.0010457 0.00104485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.03 using 59 PHA bins.
# Reduced chi-squared = 0.6671 for 57 degrees of freedom
# Null hypothesis probability = 9.749960e-01
Photon flux (15-150 keV) in 38.45 sec: 4.95784 ( -0.139264 0.139833 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55608e-05 ( -4.06386e-07 4.06793e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33014 ( -0.179727 0.0466121 )
Epeak [keV] : 9998.94 ( -9998.96 -9998.96 )
Norm@50keV : 4.14513E-02 ( -0.00104025 0.00751761 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.03 using 59 PHA bins.
# Reduced chi-squared = 0.6792 for 56 degrees of freedom
# Null hypothesis probability = 9.684405e-01
Photon flux (15-150 keV) in 38.45 sec: 4.95639 ( -0.13514 0.13699 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55632e-05 ( -4.03994e-07 4.05917e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.511340 ( 0.829145 0.829145 )
beta : -1.35918 ( 1.36643 0.0660207 )
Epeak [keV] : 56.2784 ( -56.1698 181.318 )
Norm@50keV : 0.141899 ( -0.142988 2561.37 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.52 using 59 PHA bins.
# Reduced chi-squared = 0.6640 for 55 degrees of freedom
# Null hypothesis probability = 9.740920e-01
Photon flux (15-150 keV) in 38.45 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 6.86e-06
S(50-100 keV) = 9.53e-06
T90 vs. Hardness ratio plot
T90 = 110.055999994278 sec.
Hardness ratio (energy fluence ratio) = 1.38921
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.40848
Count Ratio (50-100 keV) / (15-25 keV) = 1.11388
Mask shadow pattern
IMX = 7.560019176857721E-01, IMY = -5.817320087857388E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
-239.872000 -21.620000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.9099 -44.4855 5.5 52.5 -39.8 -1.9910 -2.1 7.5 4U 1735-44
1.7972 -39.1271 2.6 34.4 66.7 1.8133 4.5 ------ UNKNOWN
343.8240 -35.6354 2.9 40.1 44.2 1.9290 4.1 ------ UNKNOWN
94.0575 -32.3076 2.5 56.9 173.8 5.6401 4.7 ------ UNKNOWN
105.9736 -35.5910 3.3 57.2 -173.8 2.9952 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-21.620000 16.828600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.6746 -44.4019 4.8 52.6 -39.9 1.0241 2.4 4.1 4U 1735-44
337.6473 -33.1889 0.4 43.6 37.6 22.7168 32.6 ------ UNKNOWN
322.5658 -28.8344 3.1 51.3 22.2 4.3124 3.7 ------ UNKNOWN
270.5725 -44.3638 3.2 51.2 -34.9 0.9884 3.7 ------ UNKNOWN
146.6341 -53.2562 2.3 49.8 -133.0 2.0714 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
79.828600 362.388000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
335.2506 15.2399 3.2 48.5 32.4 25.4987 3.6 ------ UNKNOWN
36.3615 -50.5473 3.0 45.7 166.1 14.0846 3.9 ------ UNKNOWN
55.8931 -55.3067 2.2 56.8 173.7 60.4724 5.3 ------ UNKNOWN
326.0215 -12.1229 3.8 23.6 6.1 5.4314 3.0 ------ UNKNOWN
72.7684 -75.3051 2.9 59.3 -161.6 43.8263 4.0 ------ UNKNOWN
287.7540 -74.9248 2.4 48.0 -129.0 33.0735 4.7 ------ UNKNOWN
286.0252 -52.6279 3.6 41.3 -98.5 20.1053 3.2 ------ UNKNOWN
Plot creation:
Mon Nov 16 15:50:33 EST 2015