Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1490 -15.5287 0.2627 32.4 19.0 -0.0940 -0.7 TRIG_01218293
------------------------------------------
Foreground time interval of the image:
-233.848 -226.632 (delta_t = 7.216 [sec])
Background time interval of the image:
-239.000 -233.848 (delta_t = 5.152 [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 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 -233.848 sec. to -226.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.1524 for 57 degrees of freedom
# Null hypothesis probability = 1.029238e-06
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -233.848 sec. to -226.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.1909 for 56 degrees of freedom
# Null hypothesis probability = 6.828268e-07
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -233.848 sec. to -226.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( )
beta : -2.50000 ( )
Epeak [keV] : 80.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.2307 for 55 degrees of freedom
# Null hypothesis probability = 4.489849e-07
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) 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] : 5.00000 ( )
R^2/D10^2 : 0.0 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.1524 for 57 degrees of freedom
# Null hypothesis probability = 1.029238e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 ( )
Norm : 0.0 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00000 ( )
R1^2/D10^2 : 0.0 ( )
kT2 [keV] : 10.0000 ( )
R2^2/D10^2 : 0.0 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from -233.652 sec. to -232.652 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58712 ( -0.904866 0.780545 )
Norm@50keV : 3.78585E-03 ( -0.00163778 0.00157403 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.77 using 59 PHA bins.
# Reduced chi-squared = 1.470 for 57 degrees of freedom
# Null hypothesis probability = 1.202554e-02
Photon flux (15-150 keV) in 1 sec: 0.484577 ( -0.202414 0.204112 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.54651e-08 ( -1.55938e-08 1.6526e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -233.652 sec. to -232.652 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99951 ( 9.99991 3.81814 )
Epeak [keV] : 24.5201 ( -2.87741 3.26919 )
Norm@50keV : 5.88203E+06 ( -5.87887e+06 3.43048e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.56 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 56 degrees of freedom
# Null hypothesis probability = 2.502799e-02
Photon flux (15-150 keV) in 1 sec: 0.487744 ( -0.205571 0.2008 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.62719e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from -233.652 sec. to -232.652 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.00064 -5 )
beta : -2.61272 ( 2.61747 1.25864 )
Epeak [keV] : 25.9615 ( -5.97689 6.66603 )
Norm@50keV : 532.505 ( -194.053 2031.01 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.99 using 59 PHA bins.
# Reduced chi-squared = 1.454 for 55 degrees of freedom
# Null hypothesis probability = 1.551086e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.90264 (-1.93295 5.17903)
R^2/D10^2 : 1.01266 (-1.01265 3.06982)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.638e-09 4.851e-09
25- 50 1.018e-08 6.645e-09
50-150 1.603e-09 1.398e-09
15-150 1.942e-08 1.245e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.371 (-169.808 -198.485)
Norm : 1.93856 (-0.789093 2.24945)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.830e-09 3.130e-09
25- 50 9.287e-09 6.020e-09
50-150 2.033e-08 1.308e-08
15-150 3.445e-08 2.161e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23847 (-1.64457 2.5835)
R1^2/D10^2 : 1.41267 (-1.14851 3.00708)
kT2 [keV] : 199.169 (-172.442 -199.175)
R2^2/D10^2 : 9.56608E-05 (-6.12017e-05 0.0048154)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.832e-09 5.110e-09
25- 50 9.398e-09 5.915e-09
50-150 2.619e-08 8.030e-09
15-150 4.342e-08 1.308e-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: 1.50000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.1524 for 57 degrees of freedom
# Null hypothesis probability = 1.029238e-06
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.1909 for 56 degrees of freedom
# Null hypothesis probability = 6.828268e-07
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) 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 : -0.983950 ( )
beta : -2.50000 ( )
Epeak [keV] : 80.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.69 using 59 PHA bins.
# Reduced chi-squared = 2.2307 for 55 degrees of freedom
# Null hypothesis probability = 4.489849e-07
Photon flux (15-150 keV) in 7.216 sec: 0.0 ( ) 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) = 0.00e+00
S(50-100 keV) = 0.00e+00
T90 vs. Hardness ratio plot
T90 = 5.60000002384186 sec.
Hardness ratio (energy fluence ratio) =
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0957248
Count Ratio (50-100 keV) / (15-25 keV) = -0.122953
Mask shadow pattern
IMX = 6.002693714984250E-01, IMY = -2.069393729768471E-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:
-239.000000 -233.848000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8958 -15.7822 4.7 33.0 19.4 -0.1683 -2.5 9.8 Sco X-1
254.3174 35.2192 5.9 19.8 -137.9 0.1028 2.0 10.1 Her X-1
256.1187 -37.8913 4.4 56.1 8.6 -0.5467 -2.6 6.9 4U 1700-377
256.4390 -36.4192 214.4 54.7 7.9 0.0211 0.1 0.3 GX 349+2
263.1254 -24.7290 8.2 45.5 -4.1 0.1517 1.4 6.4 GX 1+4
268.2511 -1.5603 5.9 29.6 -33.8 -0.1260 -1.9 9.5 SW J1753.5-0127
270.4062 -25.1336 6.8 49.0 -11.8 -0.2199 -1.7 7.4 GX 5-1
270.2507 -25.7067 7.1 49.4 -11.2 -0.2176 -1.6 3.5 GRS 1758-258
273.8746 -13.9368 8.6 42.2 -25.0 -0.1273 -1.4 9.7 GX 17+2
275.9183 -30.3451 5.8 56.1 -13.1 0.7863 2.0 1.4 H1820-303
284.9463 -24.9507 20.4 57.4 -24.5 -0.3918 -0.6 5.2 HT1900.1-2455
288.7437 10.8494 3.1 42.8 -68.3 -0.4397 -3.8 6.6 GRS 1915+105
262.8918 -33.8709 8.4 53.8 0.8 0.4101 1.4 5.3 GX 354-0
200.8388 17.6169 2.6 42.1 116.7 0.5189 4.4 ------ UNKNOWN
193.5482 32.6174 2.7 48.7 137.8 0.5955 4.2 ------ UNKNOWN
281.7132 5.3706 2.9 37.8 -57.0 0.3526 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-233.848000 -226.632000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0842 -15.5456 22.6 32.4 19.1 -0.0649 -0.5 8.3 Sco X-1
254.4982 35.2002 7.9 20.1 -138.3 -0.1474 -1.5 8.8 Her X-1
255.8786 -37.8678 1397.2 55.7 8.8 0.0040 0.0 5.3 4U 1700-377
256.5489 -36.4069 3.5 54.4 7.7 -2.6913 -3.3 5.6 GX 349+2
262.9702 -24.8965 4.7 45.2 -4.0 0.4763 2.4 9.3 GX 1+4
268.4629 -1.3166 7.2 29.3 -34.9 0.1849 1.6 10.0 SW J1753.5-0127
270.1592 -25.0511 14.1 48.5 -11.7 -0.2003 -0.8 7.0 GX 5-1
270.1690 -25.6857 12.7 49.0 -11.3 -0.2226 -0.9 8.0 GRS 1758-258
273.8697 -13.9835 3.6 41.9 -25.2 0.5457 3.2 8.5 GX 17+2
275.9224 -30.2003 4.5 55.6 -13.4 -1.8674 -2.6 10.0 H1820-303
285.1508 -24.9758 6.6 57.2 -24.9 -2.3533 -1.8 7.1 HT1900.1-2455
288.7678 10.8697 9.3 42.7 -68.8 -0.2733 -1.2 4.9 GRS 1915+105
262.8969 -33.8832 11.7 53.5 0.7 0.5363 1.0 5.4 GX 354-0
215.3438 -12.7648 2.2 41.8 65.7 1.3020 5.1 ------ UNKNOWN
204.0010 45.5943 2.4 44.6 158.1 0.5650 4.8 ------ UNKNOWN
211.8863 57.9036 2.6 47.8 175.9 0.5321 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat Mar 2 23:36:58 EST 2024