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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
273.3660 -33.9879 0.0430 10.7 -30.4 0.4498 4.5 TRIG_00637807
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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)
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.53949 ( -0.672533 0.866053 )
Norm@50keV : 2.44427E-04 ( -0.000138928 0.000149427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.259949e-01
Photon flux (15-150 keV) in 64 sec: 4.92002E-02 ( -0.0176067 0.0176739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5809e-07 ( -6.69696e-08 7.65638e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.39104 ( )
Epeak [keV] : 27.2863 ( -5.64415 5.77567 )
Norm@50keV : 430.400 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.65 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.445125e-01
Photon flux (15-150 keV) in 64 sec: 4.64697E-02 ( -0.0157021 0.0169694 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23879e-07 ( -4.23584e-08 4.85696e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98835 ( -5.13748 -4.98835 )
beta : -9.37116 ( 9.37116 19.3125 )
Epeak [keV] : 27.0607 ( -4.8257 5.86451 )
Norm@50keV : 45.7994 ( -14.7159 149.472 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.78 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.064053e-01
Photon flux (15-150 keV) in 64 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] : 6.62830 (-1.58632 2.04811)
R^2/D10^2 : 0.130769 (-0.13085 0.286995)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.74 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.427303e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.562e-08 3.392e-08
25- 50 6.836e-08 4.278e-08
50-150 9.261e-09 8.237e-09
15-150 1.332e-07 8.202e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1316 (-12.0374 34.8316)
Norm : 0.479200 (-0.255097 0.553045)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.18 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.671798e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.636e-08 3.453e-08
25- 50 5.796e-08 3.651e-08
50-150 2.484e-08 2.192e-08
15-150 1.392e-07 8.800e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.357 ( )
R1^2/D10^2 : 1.18569E-06 (-1.27292e-06 0.400545)
kT2 [keV] : 6.54461 (-6.54081 2.0493)
R2^2/D10^2 : 0.136310 (-0.0874947 0.313014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.74 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Reduced chi-squared = 1.101 for 55 degrees of freedom
# Null hypothesis probability = 2.767852e-01
# Null hypothesis probability = 2.822215e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.582e-08 1.289e+00
25- 50 6.815e-08 1.030e+01
50-150 9.118e-09 2.416e+02
15-150 1.331e-07 2.875e+02
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.53949 ( -0.672533 0.866053 )
Norm@50keV : 2.44427E-04 ( -0.000138928 0.000149427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.259949e-01
Photon flux (15-150 keV) in 64 sec: 4.92002E-02 ( -0.0176067 0.0176739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5809e-07 ( -6.69696e-08 7.65638e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.39104 ( )
Epeak [keV] : 27.2863 ( -5.64415 5.77567 )
Norm@50keV : 430.400 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.65 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.445125e-01
Photon flux (15-150 keV) in 64 sec: 4.64697E-02 ( -0.0157022 0.0169694 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23879e-07 ( -4.23584e-08 4.85696e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98835 ( -5.13748 -4.98835 )
beta : -9.37116 ( 9.37116 19.3125 )
Epeak [keV] : 27.0607 ( -4.8257 5.86451 )
Norm@50keV : 45.7994 ( -14.7159 149.472 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.78 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.064053e-01
Photon flux (15-150 keV) in 64 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] : 6.62830 (-1.58632 2.04811)
R^2/D10^2 : 0.130769 (-0.13085 0.286995)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.74 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.427303e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.562e-08 3.315e-08
25- 50 6.836e-08 4.141e-08
50-150 9.261e-09 8.211e-09
15-150 1.332e-07 8.109e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1316 (-12.0374 34.8316)
Norm : 0.479200 (-0.255097 0.553046)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.18 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.671798e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.636e-08 3.546e-08
25- 50 5.796e-08 3.754e-08
50-150 2.484e-08 2.169e-08
15-150 1.392e-07 8.826e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.357 ( )
R1^2/D10^2 : 1.18569E-06 (-1.27292e-06 0.400545)
kT2 [keV] : 6.54461 (-6.54081 2.0493)
R2^2/D10^2 : 0.136310 (-0.0874947 0.313014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.74 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Reduced chi-squared = 1.101 for 55 degrees of freedom
# Null hypothesis probability = 2.767852e-01
# Null hypothesis probability = 2.822215e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.582e-08 1.118e+00
25- 50 6.815e-08 1.128e+01
50-150 9.118e-09 2.665e+02
15-150 1.331e-07 2.573e+02
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: 2.53949 ( -0.672533 0.866053 )
Norm@50keV : 2.44427E-04 ( -0.000138928 0.000149427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.259949e-01
Photon flux (15-150 keV) in 64 sec: 4.92002E-02 ( -0.0176067 0.0176739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5809e-07 ( -6.69696e-08 7.65638e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.39104 ( )
Epeak [keV] : 27.2863 ( -5.64415 5.77567 )
Norm@50keV : 430.400 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.65 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.445125e-01
Photon flux (15-150 keV) in 64 sec: 4.64697E-02 ( -0.0157019 0.0169694 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23879e-07 ( -4.23584e-08 4.85696e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98835 ( -5.13748 -4.98835 )
beta : -9.37116 ( 9.37116 19.3125 )
Epeak [keV] : 27.0607 ( -4.8257 5.86451 )
Norm@50keV : 45.7994 ( -14.7159 149.472 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.78 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.064053e-01
Photon flux (15-150 keV) in 64 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) = 5.26e-08
S(50-100 keV) = 3.62e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.688213
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.826248
Count Ratio (50-100 keV) / (15-25 keV) = 0.0271729
Mask shadow pattern
IMX = 1.631083349255417E-01, IMY = 9.567576679818923E-02
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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9889 -15.6200 0.5 22.6 108.8 2.7339 21.3 1.3 Sco X-1
255.9569 -37.8310 1.0 16.1 32.3 1.2770 11.8 1.6 4U 1700-377
256.2505 -36.4379 4.1 14.9 35.0 0.2976 2.8 9.0 GX 349+2
263.0401 -24.5971 32.1 3.6 91.4 -0.0357 -0.4 9.1 GX 1+4
264.6465 -44.5970 7.6 19.9 4.1 -0.1648 -1.5 9.7 4U 1735-44
268.2289 -1.6006 0.0 23.2 -177.9 0.2850 2.7 12.2 SW J1753.5-0127
270.2429 -25.0986 6.5 2.9 -84.4 -0.1845 -1.8 2.5 GX 5-1
270.2648 -25.7238 2.3 3.1 -72.7 0.5632 5.5 2.3 GRS 1758-258
273.9067 -14.1329 4.2 12.5 -148.5 0.2856 2.7 8.2 GX 17+2
275.7442 -30.2276 0.0 9.4 -53.9 0.2695 2.7 12.6 H1820-303
285.1967 -25.0480 5.2 16.5 -86.2 0.2439 2.2 11.6 HT1900.1-2455
288.8184 11.0268 3.7 41.6 -147.7 0.5810 3.1 5.0 GRS 1915+105
262.9349 -33.9821 542.4 9.9 19.4 0.0020 0.0 9.2 GX 354-0
247.0299 21.3025 2.3 50.0 154.5 2.1259 5.1 ------ UNKNOWN
247.6727 17.8368 2.6 46.6 153.3 1.3320 4.5 ------ UNKNOWN
251.7404 10.3417 2.6 38.2 154.2 0.8398 4.5 ------ UNKNOWN
233.5020 -68.4493 2.8 48.1 14.9 1.0633 4.1 ------ UNKNOWN
267.0151 -24.7883 1.7 0.0 111.1 0.6840 6.8 ------ UNKNOWN
277.2046 -23.6857 2.3 9.3 -95.7 0.4923 5.1 ------ UNKNOWN
291.7434 6.7386 2.4 39.7 -140.4 0.8490 4.8 ------ UNKNOWN
324.5798 -50.9142 3.0 50.7 -44.3 2.1725 3.8 ------ UNKNOWN
UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
235.500590 483.290000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
273.8547 -14.1996 0.0 43.1 123.9 -10.1869 -1.0 13.2 GX 17+2
275.9965 -30.2620 227.1 35.7 101.0 0.2912 0.1 7.3 H1820-303
284.9002 -24.8058 10.1 29.3 114.4 4.1702 1.1 10.1 HT1900.1-2455
288.8924 11.0169 10.5 49.4 164.0 8.7542 1.1 7.0 GRS 1915+105
283.7085 -27.5212 4.2 29.7 108.5 9.8013 2.8 ------ UNKNOWN
301.9168 -40.2831 2.6 16.4 69.0 12.4296 4.4 ------ UNKNOWN
304.3585 5.9221 3.8 38.1 -179.3 9.9403 3.1 ------ UNKNOWN
24.4435 -58.5265 3.2 52.9 -14.8 21.6497 3.6 ------ UNKNOWN
346.3638 -3.7121 2.4 37.8 -106.1 30.1032 4.9 ------ UNKNOWN
11.2178 -28.6576 2.4 46.4 -55.3 59.5590 4.8 ------ UNKNOWN
Plot creation:
Mon Apr 13 12:12:42 EDT 2015