J/MNRAS/379/816 SuperWASP-North extrasolar planet candidates (Street+, 2007)
SuperWASP-N extrasolar planet candidates between 18 < RA < 21h.
Street R.A., Christian D.J., Clarkson W.I., Cameron A.C., Enoch B.,
Kane S.R., Lister T.A., West R.G., Wilson D.M., Evans A., Fitzsimmons A.,
Haswell C.A., Hellier C., Hodgkin S.T., Horne K., Irwin J., Keenan F.P.,
Norton A.J., Osborne J., Pollacco D.L., Ryans R., Skillen I.,
Wheatley P.J., Barnes J.
<Mon. Not. R. Astron. Soc., 379, 816-832 (2007)>
=2007MNRAS.379..816S 2007MNRAS.379..816S
ADC_Keywords: Planets ; Photometry ; Stars, diameters
Keywords: techniques: photometric - methods: data analysis - surveys -
binaries: eclipsing - planetary systems
Abstract:
The SuperWASP-I (Wide Angle Search for Planets-I) instrument observed
6.7 million stars between 8 and 15mag from La Palma during the 2004
May-September season. Our transit-hunting algorithm selected 11626
objects from the 184442 stars within the RA (right ascension) range
18-21h. We describe our thorough selection procedure whereby catalogue
information is exploited along with careful study of the SuperWASP
data to filter out, as far as possible, transit mimics. We have
identified 35 candidates which we recommend for follow-up
observations.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 91 77 Initial list of candidates after stage 3
table3.dat 90 78 Candidate list after stage 4
--------------------------------------------------------------------------------
See also:
J/MNRAS/372/1117 : SuperWASP exoplanetary transit survey (Christian+, 2006)
J/A+A/467/785 : SuperWASP/ROSAT periodic variable stars (Norton+, 2007)
J/MNRAS/379/647 : SuperWASP-North extrasolar planet candidates (Lister+, 2007)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Note [+*(] Note (G1)
3- 21 A19 --- 1SWASP 1SWASP designation (JHHMMSS.ss+DDMMSS.s)
23- 28 F6.3 mag Vmag SW V magnitude
30- 37 F8.6 d Per Period
39- 43 F5.3 h Dur Duration
45- 50 F6.4 mag Delta Transit depth
52- 53 I2 --- Ntr Number of transits
55- 60 F6.3 --- Sred Signal-to-noise red ratio (1)
62- 71 F10.4 --- Delta.chi2 Transit depth (Delta) multiplied by
goodness of fit statistic (chi2)
73- 78 F6.3 --- S/Nell Signal-to-noise ratio of the ellipsoidal
variation (2)
80- 86 F7.4 --- Rchi2 Ratio of Δχ2 with a transit
model to the /Δχ2 of an
antri-transit model
88- 91 I4 --- LCcode LC four-digit code (3)
--------------------------------------------------------------------------------
Note (1): Ratio of the best-fitting transit depth to the rms scatter when
binned on the expected transit duration and gives a measure of
the reliability of a transit detection.
Note (2): S/N of the ellipsoidal variation (S/Nellip)<8 (based on a cosine
fit to the out-of-transit data.
Note (3): Four-digit coding scheme is:
* First digit: shape and visibility of the transit:
1 = clear transit-shaped signal of credible width and depth
2 = shallow/noisy but clearly visible transit signal
3 = transit barely visible, either very shallow, lost in noise
or ill-shaped
4 = partial transit or gaps around phase 0 but still showing clear
transit morphology
5 = signs of a dip at phase 0 but no clear in/egress
* Second digit: out-of-transit light curve:
1 = clean and flat, no other variations
2 = noisy but flat
3 = signs of ellipsoidal variation or suspected secondary eclipses
(includes some candidates which have been folded on twice the period)
4 = shows low-amplitude sinusoidal variation on short time-scales,
giving a knotty appearance (can indicate that the light curve
is folded on the wrong period)
5 = realistic variability of some other form out of transit
6 = multi-level or jumpy light curves (can indicate the wrong
period or photometry artefacts)
* Third digit: distribution of points in the folded light curve:
1 = smoothly sampled with a similar density of points throughout
2 = some minor regions with slightly lower density of points,
retaining a clear signal
3 = significant clumpiness of data points (can indicate a
pathological period)
* Fourth digit: credibility of determined period
1 = no reason to doubt measured period, clear peak in D.chi2 periodogram
2 = period gives a secure signal visible in the folded light
curve, but peak lies close to a known alias. Sometimes
associated with gaps in the folded light curve
3 = signal visible in folded light curve but period is a known
alias or peak lies at a commonly occurring frequency
4 = light curve suggests that the measured period is wrong
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Note [+*(] Note (G1)
3- 21 A19 --- 1SWASP 1SWASP designation (JHHMMSS.ss+DDMMSS.s)
22 A1 --- n_1SWASP [b] Individual note (1)
24- 32 F9.6 d Per Period
34- 38 F5.3 h Dur Duration
40- 45 F6.4 mag Delta Transit depth
47- 51 F5.2 mag V-K ?=- V(SW)-K colour index
53- 57 F5.3 mag J-H J-H colour index
59- 64 A6 --- SpType MK spectral type
66- 69 F4.2 solRad Rs Star radius
71- 74 F4.2 --- Rp Planet radius, in units of Jupier radius
76- 79 F4.2 --- etap Exoplanet diagnostic (2)
81 I1 --- Nbr Number of USNO-B1.0 objects listed within
48" of the target that are brighter
83- 84 I2 --- Nft Number of USNO-B1.0 objects objects within
48" of the target less than 5mag fainter
86 A1 --- rad Radius code (3)
88 A1 --- eta Eta code (4)
90 A1 --- bl Blendinf code (5)
--------------------------------------------------------------------------------
Note (1): 1SWASP J211448.98+203557.1 was identified in two fields, SW2114+1628
and SW2115+2351 and independent results are given for each.
Note (2): Exoplanet diagnostic defined as etap=Dobs/D where Dobs is the observed
transit duration and D is the theoretical transit duration.
Note (3): Radius code as follows:
A = Rp<1.6
B = 1.6≥Rp>1.75
C = Rp≥1.75
Note (4): Eta code as follows:
A = 0.5≥etap≥1.5
B = etap<0.5
C = etap>1.5
Note (5): Blending code as follows:
A = OK
B = 1 or 2 fainter objects in aperture
C = >2 fainter objects in aperture
D = brighter objects in aperture
--------------------------------------------------------------------------------
Global notes:
Note (G1): Note as follows:
+ = Borderline candidates (listed for information)
* = objects of particular interest at the stage 4
( = indicates that spectroscopic data are discussed in Section 5
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Christian et al., 23h<RA<03h 2006MNRAS.372.1117C 2006MNRAS.372.1117C, Cat. J/MNRAS/372/1117
Lister et al., 17h<RA<18h 2007MNRAS.379..647L 2007MNRAS.379..647L, Cat. J/MNRAS/379/647
Clarkson et al., 03h<RA<06h 2007MNRAS.381..851C 2007MNRAS.381..851C
(End) Patricia Vannier [CDS] 02-Jan-2008