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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.2961 -4.8739 0.0271 15.6 -161.1 0.0119 7.1 TRIG_00445776
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-239.128 -3.128 (delta_t = 236.000 [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 0.008000
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 0.008000
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 0.008000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.06294 ( -0.446206 0.599848 )
Norm@50keV : 2.48381E-02 ( -0.011891 0.0118925 )
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 57 degrees of freedom
# Null hypothesis probability = 4.912674e-01
Photon flux (15-150 keV) in 0.008 sec: 7.15325 ( -2.30061 2.30061 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45569e-09 ( -8.3824e-10 8.53424e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.00325 ( )
Epeak [keV] : 35.0791 ( -3.65846 3.58473 )
Norm@50keV : 4.80455E+05 ( )
------------------------------------------------------------
# Chi-Squared = 33.13 using 59 PHA bins.
# Reduced chi-squared = 0.5915 for 56 degrees of freedom
# Null hypothesis probability = 9.936039e-01
Photon flux (15-150 keV) in 0.008 sec: 9.50277 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92482e-09 ( -9.50056e-10 9.60192e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( -4.2676 2.20044 )
beta : -9.37167 ( 10 20 )
Epeak [keV] : 33.2516 ( -3.4819 4.03741 )
Norm@50keV : 1013.12 ( -1013.12 361.333 )
------------------------------------------------------------
# Chi-Squared = 35.03 using 59 PHA bins.
# Reduced chi-squared = 0.6370 for 55 degrees of freedom
# Null hypothesis probability = 9.835853e-01
Photon flux (15-150 keV) in 0.008 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.06294 ( -0.446206 0.599848 )
Norm@50keV : 2.48381E-02 ( -0.011891 0.0118925 )
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 57 degrees of freedom
# Null hypothesis probability = 4.912674e-01
Photon flux (15-150 keV) in 0.008 sec: 7.15325 ( -2.30061 2.30061 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45569e-09 ( -8.3824e-10 8.53424e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.00325 ( )
Epeak [keV] : 35.0791 ( -3.65846 3.58473 )
Norm@50keV : 4.80455E+05 ( )
------------------------------------------------------------
# Chi-Squared = 33.13 using 59 PHA bins.
# Reduced chi-squared = 0.5915 for 56 degrees of freedom
# Null hypothesis probability = 9.936039e-01
Photon flux (15-150 keV) in 0.008 sec: 9.50277 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92482e-09 ( -9.50056e-10 9.60192e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( -4.2676 2.20044 )
beta : -9.37167 ( 10 20 )
Epeak [keV] : 33.2516 ( -3.48191 4.03741 )
Norm@50keV : 1013.12 ( -1013.12 361.332 )
------------------------------------------------------------
# Chi-Squared = 35.03 using 59 PHA bins.
# Reduced chi-squared = 0.6370 for 55 degrees of freedom
# Null hypothesis probability = 9.835853e-01
Photon flux (15-150 keV) in 0.008 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
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: 3.06294 ( -0.446206 0.599848 )
Norm@50keV : 2.48381E-02 ( -0.011891 0.0118925 )
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 57 degrees of freedom
# Null hypothesis probability = 4.912674e-01
Photon flux (15-150 keV) in 0.008 sec: 7.15325 ( -2.30061 2.30061 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45569e-09 ( -8.3824e-10 8.53424e-10 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.00325 ( )
Epeak [keV] : 35.0791 ( -3.65846 3.58473 )
Norm@50keV : 4.80455E+05 ( )
------------------------------------------------------------
# Chi-Squared = 33.13 using 59 PHA bins.
# Reduced chi-squared = 0.5915 for 56 degrees of freedom
# Null hypothesis probability = 9.936039e-01
Photon flux (15-150 keV) in 0.008 sec: 9.50277 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92482e-09 ( -9.50056e-10 9.60192e-10 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38521 ( -4.2676 2.20044 )
beta : -9.37167 ( 10 20 )
Epeak [keV] : 33.2619 ( -3.50349 4.01101 )
Norm@50keV : 1010.82 ( -1010.82 363.535 )
------------------------------------------------------------
# Chi-Squared = 35.03 using 59 PHA bins.
# Reduced chi-squared = 0.6370 for 55 degrees of freedom
# Null hypothesis probability = 9.835904e-01
Photon flux (15-150 keV) in 0.008 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) = 8.14288e-10
S(50-100 keV) = 3.88162e-10
T90 vs. Hardness ratio plot
T90 = 0.0079999566078186 sec.
Hardness ratio (energy fluence ratio) = 0.476689
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.48786
Count Ratio (50-100 keV) / (15-25 keV) = 0.613417
Mask shadow pattern
IMX = -2.648231814037192E-01, IMY = 9.070722356830177E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
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:
-239.128000 -3.128000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9915 -15.6461 0.4 27.5 86.3 12.0864 28.3 0.8 Sco X-1
255.9513 -37.8477 1.2 24.3 29.4 2.8273 9.3 1.7 4U 1700-377
256.5233 -36.4529 5.4 23.0 31.0 0.6222 2.2 4.6 GX 349+2
262.9943 -24.5921 7.0 11.3 52.7 0.4068 1.7 9.2 GX 1+4
264.5961 -44.2744 0.0 26.3 8.4 -0.9041 -3.0 12.3 4U 1735-44
268.3128 -1.4371 3.3 18.4 156.5 0.9622 3.5 3.4 SW J1753.5-0127
270.4609 -25.0053 4.7 6.6 19.7 0.6144 2.4 10.6 GX 5-1
270.1259 -25.8096 8.4 7.5 18.9 0.3467 1.4 10.3 GRS 1758-258
274.0217 -13.9508 3.4 5.2 177.5 0.9342 3.4 5.2 GX 17+2
275.9977 -30.3106 3.5 11.4 -16.7 0.8692 3.3 5.1 H1820-303
285.0950 -24.9871 4.1 12.1 -65.3 0.7637 2.8 5.1 HT1900.1-2455
288.7981 10.9503 1.1 33.6 -158.8 3.4843 10.8 0.3 GRS 1915+105
299.9411 -74.8260 2.6 57.5 -14.3 6.4337 4.4 ------ UNKNOWN
303.9008 -72.9862 2.8 56.5 -16.6 4.6741 4.1 ------ UNKNOWN
322.8589 -48.4811 3.2 49.1 -48.0 5.8097 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.008000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9354 -15.4904 8.7 27.6 86.6 -0.0038 -1.3 9.3 Sco X-1
255.8216 -37.9575 16.0 24.4 29.4 0.0015 0.7 10.4 4U 1700-377
256.4307 -36.4070 217.0 23.0 31.2 0.0001 0.1 1.0 GX 349+2
263.1977 -24.6277 0.0 11.2 52.1 -0.0034 -2.0 12.5 GX 1+4
264.9647 -44.3306 0.0 26.2 7.8 -0.0036 -1.8 11.9 4U 1735-44
268.2499 -1.3075 4.1 18.6 156.4 -0.0050 -2.8 11.2 SW J1753.5-0127
270.0993 -25.2073 0.0 6.9 21.3 -0.0014 -0.8 12.6 GX 5-1
270.2589 -25.7592 5.6 7.4 18.2 -0.0039 -2.2 2.5 GRS 1758-258
274.0744 -13.9521 11.6 5.2 178.1 0.0017 1.0 6.4 GX 17+2
276.0252 -30.5182 315.0 11.6 -16.6 0.0001 0.0 10.5 H1820-303
285.1066 -25.0696 6.4 12.2 -65.0 0.0033 1.8 9.7 HT1900.1-2455
288.7347 11.1037 7.9 33.7 -159.0 0.0033 1.5 10.2 GRS 1915+105
256.4019 -4.6083 2.5 22.2 122.2 0.0101 4.7 ------ UNKNOWN
277.2028 -14.1616 2.4 6.0 -151.4 0.0081 4.9 ------ UNKNOWN
280.2961 -4.8739 1.6 15.6 -161.1 0.0119 7.1 ------ UNKNOWN
282.6759 21.2092 2.5 41.3 -173.6 0.0122 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
46.172590 335.022000
335.872000 962.986700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9836 -15.6439 0.5 36.3 59.2 32.1828 24.1 0.3 Sco X-1
254.3523 35.3111 31.7 47.0 139.8 0.9997 0.4 5.5 Her X-1
256.0433 -37.8326 2.0 39.6 19.6 5.6768 5.7 2.8 4U 1700-377
256.3420 -36.2293 0.0 38.3 21.0 1.0913 1.1 12.5 GX 349+2
262.9501 -24.7381 62.8 25.9 27.4 0.1244 0.2 3.2 GX 1+4
264.7480 -44.4506 165.2 41.8 5.7 0.0711 0.1 0.2 4U 1735-44
268.4099 -1.4767 2.2 12.4 94.8 3.0682 5.3 2.9 SW J1753.5-0127
270.4357 -25.1041 11.4 22.3 13.2 0.6698 1.0 8.4 GX 5-1
270.4575 -25.7546 5.1 22.9 12.4 1.5107 2.3 8.4 GRS 1758-258
273.9026 -13.9290 3.1 11.0 23.6 2.1369 3.7 8.8 GX 17+2
276.1159 -30.2488 0.0 25.6 -2.6 -0.7863 -1.1 12.2 H1820-303
284.9598 -24.9050 3.0 20.5 -23.1 2.2610 3.8 4.2 HT1900.1-2455
288.7951 10.9338 0.6 18.0 -162.9 12.8580 18.9 0.7 GRS 1915+105
299.6145 35.2116 1.1 44.0 -168.1 12.2675 10.6 1.3 Cyg X-1
308.1229 40.9469 71.4 52.5 -164.5 -0.3111 -0.2 0.7 Cyg X-3
246.9755 -35.1646 2.9 43.1 30.1 5.5444 4.0 ------ UNKNOWN
257.2183 -36.3771 2.3 37.9 19.9 5.1652 5.0 ------ UNKNOWN
315.5360 31.1025 3.7 49.3 -150.3 5.0151 3.1 ------ UNKNOWN
313.2965 12.0311 4.1 36.9 -128.5 3.0533 2.8 ------ UNKNOWN
Plot creation:
Sat Feb 19 00:59:43 EST 2011