J/ApJ/704/1107 Transiting planet candidates in HATNet field 205 (Latham+, 2009)
Discovery of a transiting planet and eight eclipsing binaries in HATNet field
G205.
Latham D.W., Bakos G.A., Torres G., Stefanik R.P., Noyes R.W., Kovacs G.,
Pal A., Marcy G.W., Fischer D.A., Butler R.P., Sipocz B., Sasselov D.D.,
Esquerdo G.A., Vogt S.S., Hartman J.D., Kovacs G., Lazar J., Papp I.,
Sari P.
<Astrophys. J., 704, 1107-1119 (2009)>
=2009ApJ...704.1107L 2009ApJ...704.1107L
ADC_Keywords: Planets ; Stars, double and multiple ; Photometry ;
Radial velocities ; Spectroscopy
Keywords: planetary systems - stars: individual (HAT-P-8, GSC 02757-01152) -
techniques: spectroscopic
Abstract:
We report the discovery of HAT-P-8b, a transiting planet with mass
Mp=1.52+0.18-0.16MJ, radius Rp=1.50+0.08-0.06RJ, and
photometric period P=3.076days. HAT-P-8b has a somewhat inflated
radius for its mass, and a somewhat large mass for its period. The
host star is a solar-metallicity F dwarf, with mass
M*=1.28±0.04M☉ and R*=1.58+0.08-0.06R☉_. HAT-P-8b
was initially identified as one of the 32 transiting-planet candidates
in HATNet field G205. We describe the procedures that we have used to
follow up these candidates with spectroscopic and photometric
observations, and we present a status report on our interpretation for
28 of the candidates. Eight are eclipsing binaries with orbital
solutions whose periods are consistent with their photometric
ephemerides; two of these spectroscopic orbits are single-lined and
six are double-lined.
Description:
The HATNet telescopes HAT-5, HAT-6, HAT-8, and HAT-9 observed HATNet
field G205, centered at RA=22h56m, DE=+37°30', on a nightly basis
between 2003 September 29 and 2004 February 1, and between 2006 July 3
and 2006 July 24. For the photometric follow up of many of the most
interesting candidates identified by HATNet, we have used KeplerCam on
the 1.2m reflector at FLWO. For the reconnaissance spectroscopy, we
have been using the CfA Digital Speedometers, mostly on the 1.5m
Tillinghast Reflector at FLWO, but also on the 1.5m Wyeth Reflector at
the Oak Ridge Observatory in the Town of Harvard, MA, up until 2005
when that facility was terminated.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 32 Candidates from HATNet field G205
table2.dat 56 124 Single-lined radial velocities
table3.dat 73 69 Double-lined radial velocities
table4.dat 81 32 Mean radial velocities and error estimates
table10.dat 29 4464 HATNet Photometry for HTR205-024
table11.dat 30 1451 KeplerCam Photometry for HTR205-024
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See also:
J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)
J/MNRAS/408/475 : HATNet Pleiades Rotation Period Catalogue (Hartman+, 2010)
J/ApJ/663/573 : Sloan gi light curves of HAT-TR-205-012 (Beatty+, 2007)
J/AJ/128/1761 : HATNET variability survey (Hartman+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HTR]
4- 11 A8 --- HTR HATNet transiting-planet candidate designation
<[LBT2009] HTRFFF-NNNW> in Simbad
13- 14 I2 h RAh HATNet hour of right ascension (J2000)
16- 17 I2 min RAm HATNet minute of right ascension (J2000)
19- 22 F4.1 s RAs HATNet second of right ascension (J2000)
24 A1 --- DE- HATNet sign of declination (J2000)
25- 26 I2 deg DEd HATNet degree of declination (J2000)
28- 29 I2 arcmin DEm HATNet arcminute of declination (J2000)
31- 32 I2 arcsec DEs HATNet arcsecond of declination (J2000)
34- 38 F5.2 mag Vmag Estimated V-band magnitude
40- 44 F5.2 mas/yr pm ? Proper motion
46- 49 F4.2 mag J-Ks 2MASS J-Ks color index
51- 58 F8.6 d Per Photometric period
60- 67 F8.6 d e_Per ? Period uncertainty
69- 80 F12.4 d HJD ? Epoch of mid transit (Heliocentric Julian Day)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HTR]
4- 11 A8 --- HTR HATNet transiting-planet candidate designation
<[LBT2009] HTRFFF-NNNW> in Simbad
13 A1 --- Tel [WT] Telescope code: W=Wyeth, T=Tillinghast
15- 30 A16 --- Temp Template parameters (2)
32- 44 F13.5 d HJD Heliocentric Julian Date
46- 51 F6.2 km/s HRV Heliocentric radial velocity
53- 56 F4.2 km/s e_HRV Error estimate in HRV
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Note (2): Encoded in the form tTTTTTgGGp00vVVV, where TTTTT gives the
effective temperature in K, GG the log surface gravity times 10 in cgs
units, p00 signifies that the metallicity [m/H] is plus 0, i.e. solar,
and VVV is the rotational velocity in km/s.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HTR]
4- 11 A8 --- HTR HATNet transiting-planet candidate designation
<[LBT2009] HTRFFF-NNNW> in Simbad
12- 27 A16 --- TempA Primary template parameters (1)
29- 44 A16 --- TempB Secondary template parameters (1)
46- 57 F12.4 d HJD Heliocentric Julian Date
59- 65 F7.2 km/s HRVA Primary Heliocentric radial velocity
67- 73 F7.2 km/s HRVB Secondary Heliocentric radial velocity
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Note (1): Encoded in the form tTTTTTgGGp00vVVV, where TTTTT gives the
effective temperature in K, GG the log surface gravity times 10 in cgs
units, p00 signifies that the metallicity [m/H] is plus 0, i.e. solar,
and VVV is the rotational velocity in km/s.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HTR]
4- 11 A8 --- HTR HATNet transiting-planet candidate designation
<[LBT2009] HTRFFF-NNNW> in Simbad
13- 14 I2 --- Nobs Number of observations
16- 18 I3 d Span ? Number of time spanned (days)
20- 24 F5.1 km/s vsini ? Projected rotational velocity for the primary
derived from one-dimensional correlations
26- 31 F6.2 km/s ? Mean radial velocity (1)
33- 37 F5.2 km/s e_ ? uncertainty
39- 43 F5.2 --- Ext ? External rms residuals in the observed
velocities of the primary (2)
45- 48 F4.2 --- Int ? Mean internal velocity error estimate
50- 54 F5.2 --- E/I ? Ratio of external to internal errors
56- 61 F6.2 --- chi2 ? χ2
63- 67 F5.3 --- P(chi2) ? probability of observing velocity residuals
larger than actual ones
69- 73 F5.3 --- ? Mean of the peak correlation height
75- 81 A7 --- Comm Comments (3)
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Note (1): Mean radial velocity or center-of-mass velocity from an orbital
solution.
Note (2): From the orbital fit in the case of a binary.
Note (3): Comments as follows:
DO = double-lined orbital solution,
EB = eclipsing binary,
FR = rapidly rotating star,
G = giant,
NEB = blend with nearby eclipsing binary,
NP = blend with nearby transiting planet,
S = velocity is variable,
SO = single-lined orbital solution,
P = planet confirmed by a solution for the spectroscopic orbit,
P? = possible transiting planet,
fa = withdrawn by HATNet as a photometric false alarm
(originally written as "WD")
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d BJD Barycentric Julian Day
15- 21 F7.5 mag mag Best detrended HATNet magnitude
23- 29 F7.5 mag e_mag Estimated error in mag
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julian Day
15- 22 F8.5 mag mag Best detrended Kepler-Cam z magnitude (1)
24- 30 F7.5 mag e_mag Estimated error in mag
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Note (1): Normalized to 0.0 out of transit.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Nov-2011