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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1838 -45.0156 0.0331 24.4232 63.9003 1.1035358 5.801 TRIG_00559642
Foreground time interval of the image:
-18.499 72.901 (delta_t = 91.400 [sec])
Background time interval of the image:
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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
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 64.000000
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 -79.000 sec. to 497.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46866 ( -0.227462 0.245609 )
Norm@50keV : 4.29517E-04 ( -7.96207e-05 8.03541e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.04 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 57 degrees of freedom
# Null hypothesis probability = 2.433044e-01
Photon flux (15-150 keV) in 576 sec: 8.27833E-02 ( -0.00911929 0.00912247 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45374e-06 ( -3.41444e-07 3.57371e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -79.000 sec. to 497.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.834449 ( -1.52408 0.90484 )
Epeak [keV] : 23.1826 ( )
Norm@50keV : 5.27575E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 56 degrees of freedom
# Null hypothesis probability = 4.073935e-01
Photon flux (15-150 keV) in 576 sec: 7.96964E-02 ( -0.0045558 0.009097 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10547e-06 ( -3.06369e-07 3.67615e-07 ) ergs/cm2
Band function
Time interval is from -79.000 sec. to 497.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.69311 -5 )
beta : -2.83996 ( -0.439869 0.342262 )
Epeak [keV] : 21.0075 ( -3.00535 2.53882 )
Norm@50keV : 364.530 ( -39.3644 706.263 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.45 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 55 degrees of freedom
# Null hypothesis probability = 4.205437e-01
Photon flux (15-150 keV) in 576 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] : 6.94852 (-0.827064 0.93523)
R^2/D10^2 : 0.162200 (-0.0663635 0.114963)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.26 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 57 degrees of freedom
# Null hypothesis probability = 2.373659e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.191e-07 1.453e-07
25- 50 9.707e-07 1.662e-07
50-150 1.566e-07 6.621e-08
15-150 1.846e-06 3.050e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.2174 (-6.88567 9.80292)
Norm : 0.664922 (-0.14158 0.190571)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.289217e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.824e-07 1.155e-07
25- 50 8.975e-07 1.325e-07
50-150 4.962e-07 1.903e-07
15-150 2.176e-06 3.522e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.41139 (-1.51 1.6812)
R1^2/D10^2 : 0.682386 (-0.454552 2.82478)
kT2 [keV] : 10.9004 (-8.0057 8.00486)
R2^2/D10^2 : 1.59312E-02 (-0.0148117 0.0633068)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.130856e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.907e-07 4.188e-07
25- 50 9.021e-07 4.654e-07
50-150 4.292e-07 2.581e-07
15-150 2.122e-06 1.057e-06
Peak spectrum fit
Power-law model
Time interval is from 472.500 sec. to 473.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 10.0000 ( )
Norm@50keV : 1.30612E-07 ( -1.30618e-07 -1.30618e-07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.8697 for 57 degrees of freedom
# Null hypothesis probability = 7.470904e-01
Photon flux (15-150 keV) in 1 sec: 0.118127 ( -0.118127 0.15239 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.36185e-09 ( -7.36184e-09 1.30022e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 472.500 sec. to 473.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.82639 ( )
Epeak [keV] : 38.6047 ( -42.4857 -42.4857 )
Norm@50keV : 0.149066 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.45 using 59 PHA bins.
# Reduced chi-squared = 0.8831 for 56 degrees of freedom
# Null hypothesis probability = 7.193950e-01
Photon flux (15-150 keV) in 1 sec: 0.112785 ( -0.112785 0.119275 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27245e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 472.500 sec. to 473.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.74699 ( -4.74699 -4.74699 )
beta : -9.19736 ( 9.19736 9.19736 )
Epeak [keV] : 42.5051 ( )
Norm@50keV : 3.74802 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.9013 for 55 degrees of freedom
# Null hypothesis probability = 6.813811e-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] : 0.941224 (-9.80174 -9.80174)
R^2/D10^2 : 7.48900E+05 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.02 using 59 PHA bins.
# Reduced chi-squared = 0.8599 for 57 degrees of freedom
# Null hypothesis probability = 7.650569e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.301e-09 1.172e-09
25- 50 3.145e-09 2.509e-09
50-150 1.548e-09 1.785e-09
15-150 5.994e-09 5.070e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 1.17503 (-66.9933 -66.9933)
Norm : 2.23283E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8595 for 57 degrees of freedom
# Null hypothesis probability = 7.658863e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.572e-09 1.160e-09
25- 50 2.452e-09 2.242e-09
50-150 2.980e-09 4.048e-09
15-150 7.004e-09 7.830e-09
Double BB
R1^2/D10^2 : 8.91497E+08 ( )
kT2 [keV] : 12.5464 (-12.511 -12.511)
R2^2/D10^2 : 2.25898E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.69 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.47 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.39 using 59 PHA bins.
# Reduced chi-squared = 0.8672 for 55 degrees of freedom
# Reduced chi-squared = 0.8631 for 55 degrees of freedom
# Reduced chi-squared = 0.8617 for 55 degrees of freedom
# Null hypothesis probability = 7.472054e-01
# Null hypothesis probability = 7.546533e-01
# Null hypothesis probability = 7.571440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.196e-09 6.505e-10
25- 50 2.496e-09 2.018e-09
50-150 2.472e-09 3.735e-09
15-150 6.165e-09 4.285e-09
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: 2.82750 ( -0.376904 0.463622 )
Norm@50keV : 4.43017E-04 ( -0.000161559 0.00018283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.56 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.228424e-01
Photon flux (15-150 keV) in 91.4 sec: 0.107925 ( -0.021828 0.0223352 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.53624e-07 ( -1.13941e-07 1.24926e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.65554 ( -6.3547 2.66553 )
Epeak [keV] : 25.6779 ( -3.49082 3.42091 )
Norm@50keV : 86.4146 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.9133 for 56 degrees of freedom
# Null hypothesis probability = 6.588478e-01
Photon flux (15-150 keV) in 91.4 sec: 0.112972 ( -0.020819 0.020891 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.17786e-07 ( -8.30899e-08 8.71664e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.49235 ( 1.96685 4.49235 )
beta : -2.83570 ( -0.4466 0.393901 )
Epeak [keV] : 33.4491 ( -33.4491 -33.4491 )
Norm@50keV : 5.97986E-02 ( -0.0220809 0.0247282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.56 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 55 degrees of freedom
# Null hypothesis probability = 8.943440e-02
Photon flux (15-150 keV) in 91.4 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) = 8.11498e-07
S(50-100 keV) = 5.86466e-07
T90 vs. Hardness ratio plot
T90 = 512 sec.
Hardness ratio (energy fluence ratio) = 0.722696
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.736818
Count Ratio (50-100 keV) / (15-25 keV) = 0.164907
Mask shadow pattern
IMX = 1.997782300080999E-01, IMY = -4.078030603721801E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-18.499400 72.900590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5347 -40.5728 1.4 25.3 49.9 1.5328 8.3 1.1 Vela X-1
130.1838 -45.0156 2.0 24.4 63.9 1.1037 5.8 ------ UNKNOWN
51.5669 -8.1166 2.8 58.2 -162.5 3.0170 4.1 ------ UNKNOWN
52.3004 -5.4201 3.5 58.8 -159.3 2.9407 3.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
118.900590 963.167000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5198 -40.5494 0.4 5.9 -19.5 17.4613 30.1 0.5 Vela X-1
169.9278 -60.6628 0.0 28.0 75.8 2.7867 2.4 11.7 Cen X-3
186.6817 -62.7533 1.3 36.1 77.3 14.7751 9.0 1.2 GX 301-2
185.2780 -39.6971 3.1 40.2 40.2 5.1872 3.7 ------ UNKNOWN
163.1676 -29.7395 5.9 30.0 8.4 1.4398 2.0 ------ UNKNOWN
130.1781 -45.0492 2.1 0.0 -174.5 3.3964 5.6 ------ UNKNOWN
52.0999 -36.8582 2.9 57.2 -173.7 13.6261 3.9 ------ UNKNOWN
156.1915 -18.5316 2.6 34.2 -14.7 3.2607 4.5 ------ UNKNOWN
121.6976 -20.7227 3.4 25.3 -81.2 2.7226 3.4 ------ UNKNOWN
168.1688 4.0103 3.6 59.6 -17.0 14.3824 3.2 ------ UNKNOWN
Plot creation:
Wed Jul 3 08:38:52 EDT 2013