Click here for the BAT GCN circular template
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1190 -45.0990 0.0291 24.2 -5.1 1.8905 6.6 TRIG_00417420
------------------------------------------
Foreground time interval of the image:
-116.824 128.616 (delta_t = 245.440 [sec])
Background time interval of the image:
-239.000 -116.824 (delta_t = 122.176 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 64.000000
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 64.000000
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 64.000000
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 -116.824 sec. to 128.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.39971 ( -0.272363 0.304536 )
Norm@50keV : 3.36402E-04 ( -7.62637e-05 7.61823e-05 )
------------------------------------------------------------
# Chi-Squared = 82.93 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.407506e-02
Photon flux (15-150 keV) in 245.4 sec: 6.22316E-02 ( -0.00860166 0.00860689 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.05221e-07 ( -1.41236e-07 1.48442e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -116.824 sec. to 128.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 8.58670E-02 ( -2.86545 1.02902 )
Epeak [keV] : 28.5625 ( -21.0419 9.33217 )
Norm@50keV : 1.03357E-02 ( )
------------------------------------------------------------
# Chi-Squared = 77.09 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.234279e-02
Photon flux (15-150 keV) in 245.4 sec: 5.98245E-02 ( -0.0084604 0.0085293 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -116.824 sec. to 128.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.140361 ( -1.35241 1.81195 )
beta : -9.99984 ( 19589.1 19599.1 )
Epeak [keV] : 28.3027 ( -19.4933 6.37447 )
Norm@50keV : 9.62196E-03 ( -0.00838711 0.164962 )
------------------------------------------------------------
# Chi-Squared = 77.07 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 55 degrees of freedom
# Null hypothesis probability = 2.640007e-02
Photon flux (15-150 keV) in 245.4 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] : 7.83515 (-1.00791 1.12918)
R^2/D10^2 : 7.73228E-02 (-0.0326294 0.057708)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 79.27 using 59 PHA bins.
# Reduced chi-squared = 1.391 for 57 degrees of freedom
# Null hypothesis probability = 2.718228e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.073e-07 4.944e-08
25- 50 3.499e-07 7.205e-08
50-150 8.574e-08 3.551e-08
15-150 6.429e-07 1.342e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.1578 (-9.24676 14.2645)
Norm : 0.457204 (-0.108108 0.148944)
------------------------------------------------------------
# Chi-Squared = 78.18 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 57 degrees of freedom
# Null hypothesis probability = 3.277903e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.426e-07 4.160e-08
25- 50 2.967e-07 6.382e-08
50-150 1.914e-07 9.039e-08
15-150 7.307e-07 1.541e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.40250 (-1.88457 3.3223)
R1^2/D10^2 : 6.71807 (-6.4823 -6.59149)
kT2 [keV] : 8.83683 (-1.42246 2.62048)
R2^2/D10^2 : 4.29123E-02 (-0.0326724 0.0504006)
------------------------------------------------------------
# Chi-Squared = 75.34 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 55 degrees of freedom
# Null hypothesis probability = 3.564795e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.259e-07 1.123e-07
25- 50 3.316e-07 1.838e-07
50-150 1.181e-07 6.993e-08
15-150 6.756e-07 3.483e-07
Peak spectrum fit
Power-law model
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85876 ( -0.640047 0.758341 )
Norm@50keV : 2.40946E-03 ( -0.00116029 0.00110604 )
------------------------------------------------------------
# Chi-Squared = 50.69 using 59 PHA bins.
# Reduced chi-squared = 0.8894 for 57 degrees of freedom
# Null hypothesis probability = 7.091070e-01
Photon flux (15-150 keV) in 1 sec: 0.339898 ( -0.130047 0.130053 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21537e-08 ( -9.92492e-09 1.08264e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.46107 ( )
Epeak [keV] : 40.3875 ( -8.64111 26.837 )
Norm@50keV : 10.8372 ( -11.1546 4.1831 )
------------------------------------------------------------
# Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8473 for 56 degrees of freedom
# Null hypothesis probability = 7.850908e-01
Photon flux (15-150 keV) in 1 sec: 0.311008 ( -0.111231 0.11762 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73927e-08 ( -6.4728e-09 8.5236e-09 ) ergs/cm2
Band function
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97558 ( -90.19 -80.1905 )
beta : -5.87716 ( 5.26946 5.03874 )
Epeak [keV] : 40.6630 ( -5.52006 8.75533 )
Norm@50keV : 19.7895 ( -20.1378 111.526 )
------------------------------------------------------------
# Chi-Squared = 47.31 using 59 PHA bins.
# Reduced chi-squared = 0.8601 for 55 degrees of freedom
# Null hypothesis probability = 7.600539e-01
Photon flux (15-150 keV) in 1 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] : 10.3532 (-2.68205 3.92868)
R^2/D10^2 : 0.157070 (-0.15706 0.322311)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 48.10 using 59 PHA bins.
# Reduced chi-squared = 0.8438 for 57 degrees of freedom
# Null hypothesis probability = 7.934599e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.466e-09 2.200e-09
25- 50 9.045e-09 5.725e-09
50-150 5.215e-09 3.819e-09
15-150 1.773e-08 1.155e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 71.8313 (-44.7788 -71.7943)
Norm : 1.69177 (-0.742634 1.33072)
------------------------------------------------------------
# Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.8771 for 57 degrees of freedom
# Null hypothesis probability = 7.329388e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.352e-09 2.735e-09
25- 50 6.972e-09 4.477e-09
50-150 9.127e-09 8.030e-09
15-150 2.045e-08 1.441e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.914490 (-1.24521 12.7459)
R1^2/D10^2 : 4.22533E+05 ( )
kT2 [keV] : 10.6431 (-2.81567 4.35007)
R2^2/D10^2 : 0.137709 (-0.102286 0.293746)
------------------------------------------------------------
# Chi-Squared = 47.69 using 59 PHA bins.
# Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8670 for 55 degrees of freedom
# Reduced chi-squared = 0.8662 for 55 degrees of freedom
# Null hypothesis probability = 7.474820e-01
# Null hypothesis probability = 7.490630e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.625e-09 2.182e-09
25- 50 8.740e-09 5.640e-09
50-150 5.406e-09 3.980e-09
15-150 1.777e-08 1.120e-08
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: 2.39971 ( -0.272363 0.304536 )
Norm@50keV : 3.36402E-04 ( -7.62637e-05 7.61823e-05 )
------------------------------------------------------------
# Chi-Squared = 82.93 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.407506e-02
Photon flux (15-150 keV) in 245.4 sec: 6.22316E-02 ( -0.00860166 0.00860689 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.05221e-07 ( -1.41236e-07 1.48442e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 8.58670E-02 ( -2.86545 1.02902 )
Epeak [keV] : 28.5625 ( -21.0419 9.33217 )
Norm@50keV : 1.03357E-02 ( )
------------------------------------------------------------
# Chi-Squared = 77.09 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.234279e-02
Photon flux (15-150 keV) in 245.4 sec: 5.98245E-02 ( -0.0084604 0.0085293 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.140361 ( -1.35241 1.81195 )
beta : -9.99984 ( 19589.1 19599.1 )
Epeak [keV] : 28.3027 ( -19.4666 6.37447 )
Norm@50keV : 9.62196E-03 ( -0.00838711 0.164962 )
------------------------------------------------------------
# Chi-Squared = 77.07 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 55 degrees of freedom
# Null hypothesis probability = 2.640007e-02
Photon flux (15-150 keV) in 245.4 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) = 2.64065e-07
S(50-100 keV) = 2.00164e-07
T90 vs. Hardness ratio plot
T90 = 210.304000020027 sec.
Hardness ratio (energy fluence ratio) = 0.75801
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.985352
Count Ratio (50-100 keV) / (15-25 keV) = 0.167552
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-239.000000 -116.824000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5171 -40.5580 1.1 25.5 8.9 1.4072 10.5 0.6 Vela X-1
169.9879 -60.7207 4.3 3.8 168.3 0.3183 2.7 11.3 Cen X-3
186.5224 -62.6880 3.3 11.9 176.1 0.3885 3.5 6.2 GX 301-2
264.6951 -44.3975 6.3 58.1 -173.4 1.2786 1.8 3.8 4U 1735-44
222.7602 -36.0843 2.4 44.7 147.8 1.6142 4.8 ------ UNKNOWN
195.1366 -61.6388 2.0 15.9 172.5 0.6520 5.6 ------ UNKNOWN
255.7071 -48.7875 1.4 50.8 -176.1 2.6277 8.5 ------ UNKNOWN
276.2163 -48.1924 2.8 59.4 -163.2 3.2725 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-116.824000 128.616000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5346 -40.3562 6.0 25.7 9.2 0.5626 1.9 11.9 Vela X-1
169.9194 -60.7075 0.0 3.8 168.2 -0.4496 -1.8 12.7 Cen X-3
186.5763 -62.6180 7.0 11.9 175.7 -0.4157 -1.7 9.4 GX 301-2
264.6937 -44.3273 5.8 58.1 -173.5 -3.2316 -2.0 7.7 4U 1735-44
130.1195 -45.0990 1.7 24.2 -5.1 1.8898 6.6 ------ UNKNOWN
105.3345 -18.7702 2.4 57.5 -8.5 6.5607 4.8 ------ UNKNOWN
299.5076 -62.5011 2.2 53.3 -141.2 7.1105 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
456.300600 851.050000
852.000000 963.060800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9866 -15.6492 0.4 33.4 81.5 27.5875 30.1 0.7 Sco X-1
254.5020 35.3754 3.5 49.4 161.2 4.2873 3.3 2.9 Her X-1
256.0805 -37.8667 100.6 35.6 38.1 -0.0784 -0.1 4.7 4U 1700-377
256.5100 -36.4592 3.2 34.3 39.3 2.3176 3.6 4.2 GX 349+2
262.9687 -24.7976 4.6 22.0 47.4 1.0202 2.5 3.8 GX 1+4
264.8973 -44.3114 0.0 37.7 23.0 1.5594 2.6 10.6 4U 1735-44
268.3765 -1.4978 2.7 12.3 131.5 1.5865 4.3 2.8 SW J1753.5-0127
270.3556 -25.0849 3.6 18.3 31.1 1.1980 3.2 3.9 GX 5-1
270.3248 -25.7274 3.4 18.9 30.3 1.2691 3.4 1.5 GRS 1758-258
274.0251 -13.9729 2.2 7.0 45.3 1.9658 5.2 4.0 GX 17+2
275.9243 -30.3986 5.2 22.0 12.9 0.8592 2.2 1.9 H1820-303
285.1641 -24.7522 65.2 17.4 -13.7 0.0669 0.2 12.3 HT1900.1-2455
288.7636 10.9560 0.7 22.0 -145.0 6.3773 16.7 2.1 GRS 1915+105
299.5732 35.2065 0.5 48.1 -149.7 20.0327 21.9 0.9 Cyg X-1
238.1937 -3.2438 2.5 40.4 102.1 6.6519 4.5 ------ UNKNOWN
246.5428 -46.1361 2.8 46.5 37.4 5.3509 4.2 ------ UNKNOWN
255.7275 -48.7806 1.0 44.5 28.3 9.9546 11.5 ------ UNKNOWN
255.1931 -41.6636 1.8 39.0 35.0 4.9071 6.6 ------ UNKNOWN
266.8367 44.6349 2.9 54.2 176.9 5.7691 4.0 ------ UNKNOWN
268.8363 47.7190 3.0 56.9 179.3 8.7033 3.8 ------ UNKNOWN
287.5758 49.9723 3.0 59.0 -166.1 10.3970 3.8 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Plot creation:
Thu Apr 1 10:21:38 EDT 2010