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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.4794 -45.5402 0.0507 20.7 35.3 1.2909 3.8 TRIG_00523489
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.74878 ( -0.529068 0.656197 )
Norm@50keV : 1.39096E-04 ( -6.52677e-05 7.1228e-05 )
------------------------------------------------------------
# Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 57 degrees of freedom
# Null hypothesis probability = 6.623907e-01
Photon flux (15-150 keV) in 320 sec: 3.20712E-02 ( -0.00855391 0.00858197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8176e-07 ( -1.54821e-07 1.72076e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.39558 ( 2.09887 3.67697 )
Epeak [keV] : 25.3292 ( -12.5229 5.68989 )
Norm@50keV : 2.95065 ( )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.033555e-01
Photon flux (15-150 keV) in 320 sec: 3.11204E-02 ( -0.0081575 0.0081879 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03235e-07 ( -1.08692e-07 1.19952e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.26212 ( -4.26336 -2.77746 )
beta : -8.83808 ( 6.85623 16.7976 )
Epeak [keV] : 25.2732 ( -4.44668 4.99843 )
Norm@50keV : 2.37539 ( -2.38804 14.3869 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8514 for 55 degrees of freedom
# Null hypothesis probability = 7.754535e-01
Photon flux (15-150 keV) in 320 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] : 6.21362 (-1.25112 1.5136)
R^2/D10^2 : 0.109293 (-0.0674005 0.183084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8249 for 57 degrees of freedom
# Null hypothesis probability = 8.243742e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 1.092e-07
25- 50 2.025e-07 1.226e-07
50-150 2.136e-08 1.755e-08
15-150 4.122e-07 2.450e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7073 (-8.40144 16.25)
Norm : 0.364441 (-0.1615 0.317092)
------------------------------------------------------------
# Chi-Squared = 49.36 using 59 PHA bins.
# Reduced chi-squared = 0.8659 for 57 degrees of freedom
# Null hypothesis probability = 7.541246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.933e-07 8.493e-08
25- 50 1.799e-07 1.019e-07
50-150 6.163e-08 5.058e-08
15-150 4.348e-07 2.205e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.28963 (-6.26998 85.9291)
R1^2/D10^2 : 7.63934E-02 (-0.0769343 -0.0769343)
kT2 [keV] : 6.11466 (-6.1583 -6.1583)
R2^2/D10^2 : 3.08597E-02 (-0.0317889 -0.0317889)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8550 for 55 degrees of freedom
# Null hypothesis probability = 7.692675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.875e-07 3.341e-01
25- 50 2.036e-07 2.819e+00
50-150 2.191e-08 7.187e+01
15-150 4.129e-07 7.038e+01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.74878 ( -0.529068 0.656197 )
Norm@50keV : 1.39096E-04 ( -6.52677e-05 7.1228e-05 )
------------------------------------------------------------
# Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 57 degrees of freedom
# Null hypothesis probability = 6.623907e-01
Photon flux (15-150 keV) in 320 sec: 3.20712E-02 ( -0.00855391 0.00858197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8176e-07 ( -1.54821e-07 1.72076e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.39558 ( 2.09887 3.67697 )
Epeak [keV] : 25.3292 ( -12.5229 5.68989 )
Norm@50keV : 2.95065 ( )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.033555e-01
Photon flux (15-150 keV) in 320 sec: 3.11204E-02 ( -0.0081575 0.0081879 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03235e-07 ( -1.08692e-07 1.19952e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.26212 ( -4.26336 -2.77746 )
beta : -8.83808 ( 6.85623 16.7976 )
Epeak [keV] : 25.2732 ( -4.44668 4.99843 )
Norm@50keV : 2.37539 ( -2.38804 14.3869 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8514 for 55 degrees of freedom
# Null hypothesis probability = 7.754535e-01
Photon flux (15-150 keV) in 320 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] : 6.21362 (-1.25112 1.5136)
R^2/D10^2 : 0.109293 (-0.0674005 0.183084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8249 for 57 degrees of freedom
# Null hypothesis probability = 8.243742e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 1.127e-07
25- 50 2.025e-07 1.232e-07
50-150 2.136e-08 1.745e-08
15-150 4.122e-07 2.329e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7073 (-8.40144 16.25)
Norm : 0.364441 (-0.1615 0.317092)
------------------------------------------------------------
# Chi-Squared = 49.36 using 59 PHA bins.
# Reduced chi-squared = 0.8659 for 57 degrees of freedom
# Null hypothesis probability = 7.541246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.933e-07 8.222e-08
25- 50 1.799e-07 1.020e-07
50-150 6.163e-08 5.301e-08
15-150 4.348e-07 2.182e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.28963 (-6.26998 85.9291)
R1^2/D10^2 : 7.63934E-02 (-0.0769343 -0.0769343)
kT2 [keV] : 6.11466 (-6.1583 -6.1583)
R2^2/D10^2 : 3.08597E-02 (-0.0317889 -0.0317889)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8550 for 55 degrees of freedom
# Null hypothesis probability = 7.692675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.875e-07 3.158e-01
25- 50 2.036e-07 2.565e+00
50-150 2.191e-08 6.826e+01
15-150 4.129e-07 7.554e+01
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: 2.74878 ( -0.529068 0.656197 )
Norm@50keV : 1.39096E-04 ( -6.52677e-05 7.1228e-05 )
------------------------------------------------------------
# Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 57 degrees of freedom
# Null hypothesis probability = 6.623907e-01
Photon flux (15-150 keV) in 320 sec: 3.20712E-02 ( -0.00855391 0.00858197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8176e-07 ( -1.54821e-07 1.72076e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.39558 ( 2.09887 3.67697 )
Epeak [keV] : 25.3292 ( -12.5229 5.68989 )
Norm@50keV : 2.95065 ( )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.033555e-01
Photon flux (15-150 keV) in 320 sec: 3.11204E-02 ( -0.0081575 0.0081879 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03235e-07 ( -1.08692e-07 1.19952e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.26212 ( -4.26336 -2.77746 )
beta : -8.83808 ( 6.85623 16.7976 )
Epeak [keV] : 25.2732 ( -4.44668 4.99843 )
Norm@50keV : 2.37539 ( -2.38804 14.3869 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8514 for 55 degrees of freedom
# Null hypothesis probability = 7.754535e-01
Photon flux (15-150 keV) in 320 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) = 1.61942e-07
S(50-100 keV) = 9.6335e-08
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.594873
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.687727
Count Ratio (50-100 keV) / (15-25 keV) = -0.00335635
Mask shadow pattern
IMX = 3.085793752989618E-01, IMY = -2.185548147063053E-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 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9678 -15.6395 0.3 23.9 121.9 12.1557 33.5 0.7 Sco X-1
256.0919 -37.9283 6.8 12.3 43.8 -0.5082 -1.7 7.1 4U 1700-377
256.6135 -36.4145 4.8 11.0 48.1 0.7049 2.4 8.6 GX 349+2
263.0197 -24.7202 2.2 5.3 146.6 1.5636 5.2 1.6 GX 1+4
264.9229 -44.5408 9.8 15.5 6.3 0.3473 1.2 9.4 4U 1735-44
268.4174 -1.3618 3.2 27.8 -173.3 1.1463 3.6 6.2 SW J1753.5-0127
270.2831 -25.0323 2.0 5.3 -136.2 1.7045 5.9 2.8 GX 5-1
270.1964 -25.7285 5.6 4.7 -131.5 0.6132 2.1 5.8 GRS 1758-258
274.1201 -14.1047 3.5 16.6 -150.5 1.0280 3.3 7.8 GX 17+2
276.1163 -30.4806 5.9 8.5 -75.7 0.5925 1.9 12.0 H1820-303
285.0385 -24.9828 3.6 17.1 -97.1 0.9918 3.2 3.7 HT1900.1-2455
288.8229 10.9578 2.5 45.5 -146.0 3.4101 4.7 1.6 GRS 1915+105
262.9592 -33.9846 16.6 5.7 32.4 0.1873 0.7 9.1 GX 354-0
220.1183 -77.7157 2.6 52.9 13.5 5.1144 4.5 ------ UNKNOWN
248.4955 -47.3707 1.3 23.0 34.6 3.0133 9.1 ------ UNKNOWN
239.3337 -75.1952 2.4 48.1 11.4 3.2389 4.9 ------ UNKNOWN
259.3726 -85.6794 3.0 56.7 3.0 5.9964 3.9 ------ UNKNOWN
279.6366 -22.2726 3.5 13.7 -114.3 0.9754 3.3 ------ UNKNOWN
284.0715 27.1677 4.0 58.7 -159.2 7.3526 2.9 ------ UNKNOWN
285.9857 25.7685 3.1 58.0 -156.8 7.3311 3.7 ------ UNKNOWN
295.3943 16.2227 3.3 53.2 -142.1 6.3781 3.5 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
428.300600 963.087700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2128 -60.7895 17.6 47.1 -52.9 1.5038 0.7 10.4 Cen X-3
186.6446 -62.8283 5.7 39.1 -53.4 1.5492 2.0 3.5 GX 301-2
244.9793 -15.6555 0.5 30.2 75.7 16.7071 23.4 0.9 Sco X-1
256.1042 -37.8723 6.3 8.7 117.3 -0.6680 -1.8 5.8 4U 1700-377
256.5113 -36.5583 5.3 10.0 115.5 0.8317 2.2 8.9 GX 349+2
262.8993 -24.6752 3.9 23.1 116.2 1.4579 3.0 7.3 GX 1+4
264.5860 -44.4482 3.4 10.1 175.4 1.4113 3.4 6.7 4U 1735-44
270.2726 -25.0984 3.4 25.9 130.9 1.6489 3.4 1.3 GX 5-1
270.4910 -25.8720 0.0 25.3 132.3 0.6654 1.4 12.8 GRS 1758-258
274.0034 -14.0125 50.8 37.2 126.0 0.2413 0.2 1.4 GX 17+2
275.7165 -30.2548 0.0 24.9 147.3 0.7784 1.7 12.7 H1820-303
285.1010 -24.9374 5.9 34.6 151.6 -1.3830 -2.0 3.7 HT1900.1-2455
263.0102 -33.7588 3.7 15.2 130.0 1.1936 3.1 4.7 GX 354-0
248.5269 -47.3960 0.9 2.3 -60.6 5.4209 12.9 ------ UNKNOWN
331.1476 -40.9427 4.3 56.5 -157.3 5.4512 2.7 ------ UNKNOWN
333.0546 -40.4578 3.8 57.9 -156.8 8.6450 3.1 ------ UNKNOWN
323.3136 -63.6715 3.4 43.1 -132.2 3.2621 3.4 ------ UNKNOWN
329.9946 -74.5046 3.8 43.9 -116.1 6.3318 3.1 ------ UNKNOWN
335.6283 -64.6386 3.1 48.0 -128.9 7.3590 3.7 ------ UNKNOWN
Plot creation:
Mon Jun 4 10:59:26 EDT 2012