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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1985 -15.0176 0.0086 25.1 -159.8 2.2554 22.2 TRIG_00635795
------------------------------------------
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
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)
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: 5.97857 ( -0.46668 0.482652 )
Norm@50keV : 9.51619E-05 ( -3.58962e-05 5.16776e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.17 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 57 degrees of freedom
# Null hypothesis probability = 8.469911e-01
Photon flux (15-150 keV) in 64 sec: 0.383280 ( -0.0386472 0.0387436 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.37536e-07 ( -7.07187e-08 7.07558e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.20091E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 274.67 using 59 PHA bins.
# Reduced chi-squared = 4.9048 for 56 degrees of freedom
# Null hypothesis probability = 1.358975e-30
Photon flux (15-150 keV) in 64 sec: 0.379440 ( -0.040391 0.040055 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18771e-07 ( -7.3376e-08 7.29792e-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 : -1.74655 ( 1.74507 1.74507 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 1.21560 ( -0.156927 1.23186 )
Norm@50keV : 0.322938 ( -0.182893 2433.73 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.27 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 55 degrees of freedom
# Null hypothesis probability = 8.493167e-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] : 2.51408 (-0.208224 0.240454)
R^2/D10^2 : 179.326 (-91.6341 184.113)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.60 using 59 PHA bins.
# Reduced chi-squared = 0.8000 for 57 degrees of freedom
# Null hypothesis probability = 8.609740e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.557e-07 1.768e-07
25- 50 4.931e-08 1.505e-08
50-150 1.646e-11 1.316e-11
15-150 7.050e-07 1.832e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.45886 (-0.544225 0.67453)
Norm : 135.196 (-60.4185 110.439)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.31 using 59 PHA bins.
# Reduced chi-squared = 0.7774 for 57 degrees of freedom
# Null hypothesis probability = 8.899898e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.530e-07 1.273e-07
25- 50 6.294e-08 1.934e-08
50-150 1.771e-10 1.364e-10
15-150 7.162e-07 1.410e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.50893 (-0.226663 0.263351)
R1^2/D10^2 : 182.014 (-92.0003 206.557)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 2.87202E-06 (-2.87202e-06 -2.87202e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.60 using 59 PHA bins.
#Fit statistic : Chi-Squared = 44.94 using 59 PHA bins.
# Reduced chi-squared = 0.8291 for 55 degrees of freedom
# Reduced chi-squared = 0.8171 for 55 degrees of freedom
# Null hypothesis probability = 8.127798e-01
# Null hypothesis probability = 8.315552e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.547e-07 1.386e-07
25- 50 4.949e-08 1.504e-08
50-150 1.853e-11 1.270e-11
15-150 7.041e-07 1.540e-07
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: 5.97857 ( -0.46668 0.482652 )
Norm@50keV : 9.51619E-05 ( -3.58962e-05 5.16776e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.17 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 57 degrees of freedom
# Null hypothesis probability = 8.469911e-01
Photon flux (15-150 keV) in 64 sec: 0.383280 ( -0.0386472 0.0387436 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.37536e-07 ( -7.07187e-08 7.07558e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.20091E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 274.67 using 59 PHA bins.
# Reduced chi-squared = 4.9048 for 56 degrees of freedom
# Null hypothesis probability = 1.358975e-30
Photon flux (15-150 keV) in 64 sec: 0.379440 ( -0.040391 0.040055 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18771e-07 ( -7.3376e-08 7.29792e-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 : -1.74655 ( 1.74507 1.74507 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 1.21560 ( -0.156927 1.23185 )
Norm@50keV : 0.322938 ( -0.182893 3212.57 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.27 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 55 degrees of freedom
# Null hypothesis probability = 8.493167e-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] : 2.51408 (-0.208224 0.240454)
R^2/D10^2 : 179.326 (-91.6341 184.113)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.60 using 59 PHA bins.
# Reduced chi-squared = 0.8000 for 57 degrees of freedom
# Null hypothesis probability = 8.609740e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.557e-07 1.708e-07
25- 50 4.931e-08 1.520e-08
50-150 1.646e-11 1.284e-11
15-150 7.050e-07 1.431e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.45886 (-0.544225 0.67453)
Norm : 135.196 (-60.4185 110.439)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.31 using 59 PHA bins.
# Reduced chi-squared = 0.7774 for 57 degrees of freedom
# Null hypothesis probability = 8.899898e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.530e-07 1.315e-07
25- 50 6.294e-08 1.693e-08
50-150 1.771e-10 1.365e-10
15-150 7.162e-07 1.448e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.50893 (-0.226663 0.263351)
R1^2/D10^2 : 182.014 (-92.0003 206.557)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 2.87202E-06 (-2.87202e-06 -2.87202e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.60 using 59 PHA bins.
#Fit statistic : Chi-Squared = 44.94 using 59 PHA bins.
# Reduced chi-squared = 0.8291 for 55 degrees of freedom
# Reduced chi-squared = 0.8171 for 55 degrees of freedom
# Null hypothesis probability = 8.127798e-01
# Null hypothesis probability = 8.315552e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.547e-07 1.536e-07
25- 50 4.949e-08 1.549e-08
50-150 1.853e-11 1.381e-11
15-150 7.041e-07 1.474e-07
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: 5.97857 ( -0.46668 0.482652 )
Norm@50keV : 9.51619E-05 ( -3.58962e-05 5.16776e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.17 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 57 degrees of freedom
# Null hypothesis probability = 8.469911e-01
Photon flux (15-150 keV) in 64 sec: 0.383280 ( -0.0386472 0.0387436 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.37536e-07 ( -7.07187e-08 7.07558e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.20091E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 274.67 using 59 PHA bins.
# Reduced chi-squared = 4.9048 for 56 degrees of freedom
# Null hypothesis probability = 1.358975e-30
Photon flux (15-150 keV) in 64 sec: 0.379440 ( -0.040391 0.040055 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18771e-07 ( -7.3376e-08 7.29792e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.74655 ( 1.74507 1.74507 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 1.21560 ( -0.156927 1.23186 )
Norm@50keV : 0.322938 ( -0.182893 3211.96 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.27 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 55 degrees of freedom
# Null hypothesis probability = 8.493167e-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) = 9.05e-08
S(50-100 keV) = 5.74e-09
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.0634254
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0834153
Count Ratio (50-100 keV) / (15-25 keV) = -0.00733107
Mask shadow pattern
IMX = -4.394757394745163E-01, IMY = 1.617835741385017E-01
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:
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] [']
170.5138 -60.7051 17.3 45.4 0.8 0.1209 0.7 7.6 Cen X-3
186.8213 -62.8634 5.5 39.3 -6.8 0.2733 2.1 7.2 GX 301-2
244.8924 -15.7643 5.6 24.4 -159.0 0.2105 2.0 9.0 Sco X-1
256.2077 -37.7579 5.6 26.5 -101.0 0.2678 2.1 11.7 4U 1700-377
256.2428 -36.4297 12.9 26.5 -103.9 -0.1146 -0.9 9.3 GX 349+2
263.1350 -24.9270 0.0 34.4 -124.4 -0.1403 -1.0 12.9 GX 1+4
264.9436 -44.5114 13.1 33.8 -89.0 0.1829 0.9 9.3 4U 1735-44
268.2612 -1.4152 28.4 51.0 -150.5 0.1120 0.4 6.8 SW J1753.5-0127
270.3428 -25.2144 4.5 40.4 -120.3 0.5854 2.6 8.7 GX 5-1
270.3839 -25.6358 7.0 40.3 -119.6 -0.3784 -1.6 7.8 GRS 1758-258
274.1270 -14.1525 7.5 48.4 -132.4 -0.6219 -1.5 9.9 GX 17+2
262.9750 -33.9656 8.0 32.1 -108.4 0.2171 1.4 7.9 GX 354-0
204.4365 -25.0633 2.5 18.9 72.3 0.5137 4.7 ------ UNKNOWN
161.0827 -50.5974 2.2 49.7 15.1 1.4123 5.2 ------ UNKNOWN
245.1985 -15.0177 0.5 25.1 -159.8 2.2555 22.2 ------ UNKNOWN
268.4225 4.3309 2.9 55.1 -155.6 1.5509 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
123.900590 303.068400
361.000000 423.057000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8189 -15.7735 8.8 0.8 19.6 -0.3136 -1.3 12.2 Sco X-1
254.5194 35.3426 6.6 51.1 -176.7 -1.2301 -1.7 3.0 Her X-1
255.9989 -37.6968 6.2 24.6 -27.3 -0.4313 -1.9 8.9 4U 1700-377
256.2577 -36.4553 10.9 23.6 -29.1 -0.2473 -1.0 8.8 GX 349+2
263.1693 -24.8486 6.0 19.5 -63.4 -0.4896 -1.9 10.7 GX 1+4
264.8767 -44.4563 6.7 33.8 -32.0 0.4900 1.7 5.7 4U 1735-44
268.4153 -1.5968 8.1 26.6 -124.6 0.3796 1.4 9.1 SW J1753.5-0127
270.4479 -25.0732 4.9 25.7 -69.4 0.7206 2.3 8.9 GX 5-1
270.2144 -25.7541 5.5 25.7 -67.8 0.6284 2.1 4.8 GRS 1758-258
274.1567 -13.9030 0.0 28.0 -95.0 -0.5796 -1.7 11.9 GX 17+2
275.8891 -30.4873 9.8 32.1 -62.3 -0.4365 -1.2 7.5 H1820-303
284.8643 -24.8301 0.0 38.4 -75.2 1.5482 2.3 10.8 HT1900.1-2455
263.1603 -33.8658 6.4 24.9 -44.0 0.4880 1.8 8.7 GX 354-0
245.2534 -14.9927 0.3 0.1 -127.6 9.0143 35.7 ------ UNKNOWN
244.5024 -67.9715 2.8 52.9 -6.1 2.6904 4.2 ------ UNKNOWN
256.2911 -37.1292 0.7 24.2 -28.4 3.9371 17.1 ------ UNKNOWN
271.1520 -33.6437 2.2 29.9 -53.3 1.6545 5.3 ------ UNKNOWN
278.2528 33.7838 2.5 58.1 -154.1 7.5367 4.7 ------ UNKNOWN
Plot creation:
Mon Mar 23 02:06:58 EDT 2015