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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
59.0490 -48.8978 0.0447 30.4 -30.3 0.0501 4.3 TRIG_00590503
------------------------------------------
Foreground time interval of the image:
0.000 0.256 (delta_t = 0.256 [sec])
Background time interval of the image:
-183.531 -30.023 (delta_t = 153.508 [sec])
-28.832 -8.832 (delta_t = 20.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
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 0.256000
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 0.256000
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 0.000 sec. to 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.21550 ( -0.9532 1.43949 )
Norm@50keV : 2.36239E-03 ( -0.00236081 0.00456722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.21 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.960897e-01
Photon flux (15-150 keV) in 0.256 sec: 0.604137 ( -0.604166 0.443588 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57492e-08 ( -1.96108e-08 1.6107e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99960 ( )
Epeak [keV] : 151.294 ( -151.279 251.609 )
Norm@50keV : 2.30172E-02 ( -0.0230557 0.0911968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.65 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.119304e-01
Photon flux (15-150 keV) in 0.256 sec: 0.701877 ( -0.377299 0.378963 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25949e-08 ( -1.75288e-08 1.74602e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38547 ( 0.15543 0.15543 )
beta : -9.37167 ( 9.36874 11.4222 )
Epeak [keV] : 227.120 ( -106.164 744.001 )
Norm@50keV : 5.47852E-03 ( -0.00547604 777.713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.45 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.560395e-01
Photon flux (15-150 keV) in 0.256 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] : 199.308 ( )
R^2/D10^2 : 3.69803E-04 (-0.000225721 0.00350223)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.42 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.895908e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.18 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.128732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
R1^2/D10^2 : 3.28595 ( )
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 3.81610E-04 (-0.000225327 0.0057135)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.67 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.41 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.227212e-01
# Null hypothesis probability = 2.233553e-01
# Null hypothesis probability = 2.295291e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.21550 ( -0.9532 1.43949 )
Norm@50keV : 2.36239E-03 ( -0.00236081 0.00456722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.21 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.960897e-01
Photon flux (15-150 keV) in 0.256 sec: 0.604137 ( -0.604166 0.443588 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57492e-08 ( -1.96108e-08 1.6107e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99960 ( )
Epeak [keV] : 151.294 ( -151.279 258.344 )
Norm@50keV : 2.30172E-02 ( -0.0230557 0.0911968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.65 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.119304e-01
Photon flux (15-150 keV) in 0.256 sec: 0.701877 ( -0.377299 0.378963 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25949e-08 ( -1.75288e-08 1.74602e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38547 ( 0.15543 0.15543 )
beta : -9.37167 ( 9.36874 11.4222 )
Epeak [keV] : 227.120 ( -106.164 770.207 )
Norm@50keV : 5.47852E-03 ( -0.00547604 777.713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.45 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.560395e-01
Photon flux (15-150 keV) in 0.256 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] : 199.308 ( )
R^2/D10^2 : 3.69803E-04 (-0.000225721 0.00350223)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.42 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.895908e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.18 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.128732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
R1^2/D10^2 : 3.28595 ( )
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 3.81610E-04 (-0.000225327 0.0057135)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.67 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.41 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.227212e-01
# Null hypothesis probability = 2.233553e-01
# Null hypothesis probability = 2.295291e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: -1.21550 ( -0.9532 1.43949 )
Norm@50keV : 2.36239E-03 ( -0.00236081 0.00456722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.21 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.960897e-01
Photon flux (15-150 keV) in 0.256 sec: 0.604137 ( -0.604166 0.443588 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57492e-08 ( -1.96108e-08 1.6107e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99960 ( )
Epeak [keV] : 151.294 ( -151.279 258.36 )
Norm@50keV : 2.30172E-02 ( -0.0230557 0.0911968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.65 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.119304e-01
Photon flux (15-150 keV) in 0.256 sec: 0.701877 ( -0.377299 0.378963 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25949e-08 ( -1.75288e-08 1.74602e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38547 ( 0.15543 0.15543 )
beta : -9.37167 ( 9.36874 11.4222 )
Epeak [keV] : 227.120 ( -106.164 9407.08 )
Norm@50keV : 5.47852E-03 ( -0.00547604 777.713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.45 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.560395e-01
Photon flux (15-150 keV) in 0.256 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) = 6.70843e-10
S(50-100 keV) = 6.24371e-09
T90 vs. Hardness ratio plot
T90 = 0.255999982357025 sec.
Hardness ratio (energy fluence ratio) = 9.30726
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -1.02619
Count Ratio (50-100 keV) / (15-25 keV) = -1.65503
Mask shadow pattern
IMX = 5.054901639934323E-01, IMY = 2.956809670946123E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
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:
-183.531410 -30.023100
-28.832000 -8.832000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4149 -40.4693 18.1 38.7 71.8 1.4809 0.6 7.3 Vela X-1
170.2812 -60.7673 6.1 28.6 123.3 -1.7045 -1.9 8.7 Cen X-3
186.5063 -62.7668 19.1 30.8 138.7 0.5416 0.6 4.1 GX 301-2
117.3051 -43.1036 2.4 33.2 50.2 4.6736 4.8 ------ UNKNOWN
222.0011 -47.8533 3.7 52.0 158.1 10.5131 3.1 ------ UNKNOWN
114.4420 -47.7088 3.3 28.3 47.9 3.0158 3.5 ------ UNKNOWN
104.1051 -61.5705 2.6 13.7 37.4 2.9014 4.5 ------ UNKNOWN
92.6719 -54.7287 2.6 20.3 15.6 2.5982 4.5 ------ UNKNOWN
76.7418 -41.2423 3.7 34.9 -4.4 2.4262 3.1 ------ UNKNOWN
61.8681 -35.5044 2.6 42.7 -21.0 4.2079 4.4 ------ UNKNOWN
315.0226 -54.5376 2.3 48.0 -128.9 14.0532 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.256000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4965 -40.7099 9.3 38.5 72.0 -0.0448 -1.2 9.4 Vela X-1
170.6103 -60.6854 3.2 28.7 123.5 0.0566 3.6 9.4 Cen X-3
186.3958 -62.6574 5.6 30.9 138.5 -0.0295 -2.1 9.9 GX 301-2
210.4770 -55.0420 2.3 43.0 151.8 0.1194 4.9 ------ UNKNOWN
58.7071 -56.1333 2.3 23.7 -36.4 0.0532 5.0 ------ UNKNOWN
62.3968 -23.9432 2.1 54.0 -17.3 0.1722 5.5 ------ UNKNOWN
49.4776 -23.9655 2.3 56.4 -31.4 0.3142 5.0 ------ UNKNOWN
317.6938 -55.1399 2.0 47.1 -127.1 0.2553 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Wed Mar 19 00:20:38 EDT 2014