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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
113.5960 -50.4041 0.0498 44.2 -21.4 3.0185 3.8 TRIG_00595162
------------------------------------------
Foreground time interval of the image:
0.000 19.730 (delta_t = 19.730 [sec])
21.000 544.790 (delta_t = 523.790 [sec])
546.000 665.060 (delta_t = 119.060 [sec])
666.000 672.360 (delta_t = 6.360 [sec])
674.000 840.000 (delta_t = 166.000 [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
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)
The mask-weighted light curves based on cleaned DPHs
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 19.730000
21.000000 544.790000
546.000000 665.060000
666.000000 672.360000
674.000000 840.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.73335 ( -0.506608 0.637108 )
Norm@50keV : 1.52753E-04 ( -6.84796e-05 7.14437e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.89 using 59 PHA bins.
# Reduced chi-squared = 0.7525 for 57 degrees of freedom
# Null hypothesis probability = 9.170458e-01
Photon flux (15-150 keV) in 834.9 sec: 3.48584E-02 ( -0.00885301 0.00885969 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37294e-06 ( -4.17266e-07 4.51119e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 19.730000
21.000000 544.790000
546.000000 665.060000
666.000000 672.360000
674.000000 840.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.754942 ( )
Epeak [keV] : 19.2853 ( )
Norm@50keV : 3.54092E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.15 using 59 PHA bins.
# Reduced chi-squared = 0.7349 for 56 degrees of freedom
# Null hypothesis probability = 9.313662e-01
Photon flux (15-150 keV) in 834.9 sec: 3.39741E-02 ( -0.00864 0.0087368 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1831e-06 ( -3.47828e-07 4.72011e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 19.730000
21.000000 544.790000
546.000000 665.060000
666.000000 672.360000
674.000000 840.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.71881 ( -7.6679 -4.71881 )
beta : -3.49306 ( 3.49306 0.960646 )
Epeak [keV] : 22.0786 ( -5.40124 5.15574 )
Norm@50keV : 71.6969 ( -17.6857 852017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.63 using 59 PHA bins.
# Reduced chi-squared = 0.7387 for 55 degrees of freedom
# Null hypothesis probability = 9.260032e-01
Photon flux (15-150 keV) in 834.9 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] : 6.14068 (-1.43778 1.83317)
R^2/D10^2 : 0.119403 (-0.119368 0.271535)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.51 using 59 PHA bins.
# Reduced chi-squared = 0.7283 for 57 degrees of freedom
# Null hypothesis probability = 9.386847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.160e-07 3.006e-07
25- 50 5.410e-07 3.325e-07
50-150 5.443e-08 4.469e-08
15-150 1.111e-06 6.775e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.2351 (-9.49151 18.6196)
Norm : 0.363854 (-0.161557 0.340098)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.35 using 59 PHA bins.
# Reduced chi-squared = 0.7255 for 57 degrees of freedom
# Null hypothesis probability = 9.408525e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.294e-07 2.020e-07
25- 50 5.169e-07 2.622e-07
50-150 1.970e-07 1.579e-07
15-150 1.243e-06 6.071e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98612 (-4.98715 -4.98715)
R1^2/D10^2 : 0.228577 (-0.228468 -0.228468)
kT2 [keV] : 11.2174 (-11.2245 -11.2245)
R2^2/D10^2 : 3.45881E-03 (-0.00344716 0.330235)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.87 using 59 PHA bins.
# Reduced chi-squared = 0.7431 for 55 degrees of freedom
# Null hypothesis probability = 9.220284e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.352e-07 3.193e-07
25- 50 5.186e-07 3.806e-07
50-150 1.713e-07 1.420e-07
15-150 1.225e-06 7.765e-07
Peak spectrum fit
Power-law model
Time interval is from 674.000 sec. to 840.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.73335 ( -0.506608 0.637108 )
Norm@50keV : 1.52753E-04 ( -6.84796e-05 7.14437e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.89 using 59 PHA bins.
# Reduced chi-squared = 0.7525 for 57 degrees of freedom
# Null hypothesis probability = 9.170458e-01
Photon flux (15-150 keV) in 834.9 sec: 3.48584E-02 ( -0.00885301 0.00885969 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37294e-06 ( -4.17266e-07 4.51119e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 674.000 sec. to 840.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.754942 ( )
Epeak [keV] : 19.2853 ( )
Norm@50keV : 3.54092E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.15 using 59 PHA bins.
# Reduced chi-squared = 0.7349 for 56 degrees of freedom
# Null hypothesis probability = 9.313662e-01
Photon flux (15-150 keV) in 834.9 sec: 3.39741E-02 ( -0.00864 0.0087368 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1831e-06 ( -3.47828e-07 4.72011e-07 ) ergs/cm2
Band function
Time interval is from 674.000 sec. to 840.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.87222 ( -8.29603 -4.87222 )
beta : -3.48713 ( -4.98749 0.954992 )
Epeak [keV] : 22.0474 ( -22.0474 5.11894 )
Norm@50keV : 95.8973 ( -23.6559 851458 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.63 using 59 PHA bins.
# Reduced chi-squared = 0.7388 for 55 degrees of freedom
# Null hypothesis probability = 9.259641e-01
Photon flux (15-150 keV) in 834.9 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] : 6.14068 (-1.43778 1.83317)
R^2/D10^2 : 0.119403 (-0.119368 0.271535)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.51 using 59 PHA bins.
# Reduced chi-squared = 0.7283 for 57 degrees of freedom
# Null hypothesis probability = 9.386847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.160e-07 3.055e-07
25- 50 5.410e-07 3.194e-07
50-150 5.443e-08 4.551e-08
15-150 1.111e-06 6.604e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.2351 (-9.49151 18.6196)
Norm : 0.363854 (-0.161557 0.340098)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.35 using 59 PHA bins.
# Reduced chi-squared = 0.7255 for 57 degrees of freedom
# Null hypothesis probability = 9.408525e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.294e-07 2.240e-07
25- 50 5.169e-07 2.605e-07
50-150 1.970e-07 1.638e-07
15-150 1.243e-06 5.413e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98612 (-4.98715 -4.98715)
R1^2/D10^2 : 0.228577 (-0.228468 -0.228468)
kT2 [keV] : 11.2174 (-11.2245 -11.2245)
R2^2/D10^2 : 3.45881E-03 (-0.00344716 0.330235)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.87 using 59 PHA bins.
# Reduced chi-squared = 0.7431 for 55 degrees of freedom
# Null hypothesis probability = 9.220284e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.352e-07 3.580e-07
25- 50 5.186e-07 3.871e-07
50-150 1.713e-07 9.927e-08
15-150 1.225e-06 7.656e-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: 2.73335 ( -0.506608 0.637108 )
Norm@50keV : 1.52753E-04 ( -6.84796e-05 7.14437e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.89 using 59 PHA bins.
# Reduced chi-squared = 0.7525 for 57 degrees of freedom
# Null hypothesis probability = 9.170458e-01
Photon flux (15-150 keV) in 834.9 sec: 3.48584E-02 ( -0.00885301 0.00885969 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37294e-06 ( -4.17266e-07 4.51119e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.754942 ( )
Epeak [keV] : 19.2853 ( )
Norm@50keV : 3.54092E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.15 using 59 PHA bins.
# Reduced chi-squared = 0.7349 for 56 degrees of freedom
# Null hypothesis probability = 9.313662e-01
Photon flux (15-150 keV) in 834.9 sec: 3.39741E-02 ( -0.00864 0.0087368 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1831e-06 ( -3.47828e-07 4.72011e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.13985 ( -6.99736 -4.13983 )
beta : -3.50989 ( 3.50983 1.04914 )
Epeak [keV] : 22.1412 ( -22.1417 5.56307 )
Norm@50keV : 24.3733 ( -24.3681 23.9279 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.62 using 59 PHA bins.
# Reduced chi-squared = 0.7386 for 55 degrees of freedom
# Null hypothesis probability = 9.261021e-01
Photon flux (15-150 keV) in 834.9 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) = 4.61431e-07
S(50-100 keV) = 2.77574e-07
T90 vs. Hardness ratio plot
T90 = 840 sec.
Hardness ratio (energy fluence ratio) = 0.60155
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.972624
Count Ratio (50-100 keV) / (15-25 keV) = 0.193036
Mask shadow pattern
IMX = 9.043265192677391E-01, IMY = 3.542333241190493E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
0.000000 19.730000
21.000000 544.790000
546.000000 665.060000
666.000000 672.360000
674.000000 840.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5454 -40.5339 0.5 40.3 5.2 16.2041 22.0 1.5 Vela X-1
170.3174 -60.7765 4.9 11.8 -13.1 1.1561 2.3 9.2 Cen X-3
186.6583 -62.7639 0.4 4.9 -43.7 14.6534 30.9 0.4 GX 301-2
255.9769 -37.9319 20.5 44.2 -176.1 0.4510 0.6 5.3 4U 1700-377
256.3620 -36.3919 9.4 45.6 -177.1 1.0737 1.2 4.0 GX 349+2
264.6376 -44.4329 25.0 43.8 -162.8 -0.4169 -0.5 4.6 4U 1735-44
262.9631 -33.7812 4.2 51.0 -173.7 3.3263 2.7 3.5 GX 354-0
150.8221 -19.7325 3.7 50.1 37.3 7.8072 3.1 ------ UNKNOWN
130.8731 -31.5032 3.6 49.7 9.2 3.6097 3.2 ------ UNKNOWN
121.5060 -28.7753 2.8 56.7 3.0 11.0986 4.0 ------ UNKNOWN
128.9620 -35.5315 2.6 47.5 4.2 3.8978 4.5 ------ UNKNOWN
118.7672 -30.4210 2.8 56.7 -0.5 10.5510 4.1 ------ UNKNOWN
188.1807 -61.8142 2.7 3.8 -40.2 1.8880 4.3 ------ UNKNOWN
255.2238 -41.7933 2.4 40.9 -172.9 3.7056 4.9 ------ UNKNOWN
103.4964 -41.4673 3.2 55.5 -20.4 6.9089 3.6 ------ UNKNOWN
104.8521 -54.7272 3.3 45.0 -31.1 3.0506 3.5 ------ UNKNOWN
97.1921 -40.7904 3.8 58.9 -24.4 11.2076 3.1 ------ UNKNOWN
93.8129 -45.3213 3.3 56.7 -29.9 11.8788 3.5 ------ UNKNOWN
78.6002 -64.6390 3.1 46.9 -53.7 10.1187 3.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Wed Apr 9 05:30:21 EDT 2014