J/MNRAS/463/1780 Exoplanet candidates in Praesepe (M 44) (Libralato+, 2016)
A PSF-based approach to Kepler/K2 data.
II. Exoplanet candidates in Praesepe (M 44).
Libralato M., Nardiello D., Bedin L.R., Borsato L., Granata V.,
Malavolta L., Piotto G., Ochner P., Cunial A., Nascimbeni V.
<Mon. Not. R. Astron. Soc., 463, 1780-1796 (2016)>
=2016MNRAS.463.1780L 2016MNRAS.463.1780L (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, double and multiple ; Planets ;
Exoplanets ; Photometry
Keywords: techniques: image processing - techniques: photometric -
binaries: general - planetary systems - stars: variables: general -
open clusters and associations: individual: NGC 2632 (M 44)
Abstract:
In this work we keep pushing K2 data to a high photometric precision,
close to that of the Kepler main mission, using a PSF-based,
neighbour-subtraction technique, which also overcome the dilution
effects in crowded environments. We analyse the open cluster M 44
(NGC 2632), observed during the K2 Campaign 5, and extract light
curves of stars imaged on module 14, where most of the cluster lies.
We present two candidate exoplanets hosted by cluster members and five
by field stars. As a by-product of our investigation, we find 1680
eclipsing binaries and variable stars, 1071 of which are new
discoveries. Among them, we report the presence of a heartbeat binary
star. Together with this work, we release to the community a catalogue
with the variable stars and the candidate exoplanets found, as well as
all our raw and detrended light curves.
Description:
We observed M 44 in seven nights (between 2015 March 27 and April 22)
using the Asiago 67/92 cm Schmidt telescope on Mount Ekar. A SBIG
STL-11000M camera, equipped with a Kodak KAI-11000M detector
(4050x2672-pixel2 with a pixel scale of 0.8625-arcsec/pixel), is
placed at the focus of the telescope and covers a field of view (FoV)
of about 58x38-arcmin2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 117 24462 M 44 input catalogue
table4.dat 61 1680 Variable/exoplanet catalogue
list.dat 112 4 List of fits images
fits/* . 4 Individual fits images
lc/* . 2199 Individual light curves
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See also:
J/MNRAS/463/1831 : Exoplanet candidates in M 67 (NGC 2682)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right ascension (J2000)
11- 20 F10.6 deg DEdeg Declination (J2000)
22- 29 F8.4 mag Nmag ?=-99.9999 Instrumental "white light" magnitude
31- 38 F8.4 mag Bmag ?=-99.9999 Calibrated B magnitude
40- 47 F8.4 mag Rmag ?=-99.9999 Calibrated R magnitude
49- 56 F8.4 mag Imag ?=-99.9999 Calibrated I magnitude
58- 65 F8.4 mag Jmag ?=-99.9999 Calibrated 2MASS J magnitude
67- 74 F8.4 mag Hmag ?=-99.9999 Calibrated 2MASS H magnitude
76- 83 F8.4 mag Kmag ?=-99.9999 Calibrated 2MASS H magnitude
85- 91 F7.2 mas/yr pmRA ?=-999.99 Proper motion along RA (pmRA*cosDE)
93- 99 F7.2 mas/yr pmDE ?=-999.99 Proper motion along DE
101-108 F8.4 mag Kpmag ?=-99.9999 Instrumental Kepler magnitude
110-114 I05 --- ID ID number of the star in the corresponding mAIC
116-117 I2 --- K2ch ?=0 K2 channel number
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 I05 --- ID ID number
7- 8 I2 --- K2ch K2 channel number
10- 16 F7.4 mag Kpmag Kepler magnitude
18- 28 F11.8 d Per Period (1)
30 I1 --- Flag [1/3] Light-curve classification flag (2)
32- 46 A15 --- Ref Reference for catalogues in the literature
that already analysed the object (3)
48- 61 A14 --- Name EPIC or ESPG name if the star hosts one of the
candidate exoplanets listed in Tables 1 and 2
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Note (1): If Period = 74.82 d, the star could be either irregular/long-period
variable or the observed variability is due to a systematic effect.
Note (2): Flag as follows:
1 = candidate variable
2 = 'difficult-interpretation' object
3 = possible blend
Note (3): References as follows:
1 = Agueros et al. (2011ApJ...740..110A 2011ApJ...740..110A)
2 = Bouvier et al. (2001, Cat. J/A+A/375/989)
3 = Breger et al. (2012AN....333..131B 2012AN....333..131B)
4 = Casewell et al. (2012ApJ...759L..34C 2012ApJ...759L..34C)
5 = Delorme et al. (2011, Cat. J/MNRAS/413/2218)
6 = Douglas et al. (2014, Cat. J/ApJ/795/161)
7 = Drake et al. (2014, Cat. J/ApJS/213/9)
8 = Kovacs et al. (2014, Cat. J/MNRAS/442/2081)
9 = Li (2007AJ....133..518L 2007AJ....133..518L)
10 = Liu et al. (2007PASJ...59..607L 2007PASJ...59..607L)
11 = Malavolta et al. (2016, Cat. J/A+A/588/A118)
12 = Mermilliod et al. (2009, Cat. J/A+A/498/949)
13 = Pepper et al. (2008, Cat. J/AJ/135/907)
14 = Quinn et al. (2012, Cat. J/ApJ/756/L33)
15 = Scholz et al. (2011MNRAS.413.2595S 2011MNRAS.413.2595S)
16 = GCVS (Samues et al., Cat. B/gcvs)
17 = VSX (Watson et al., Cat. B/vsx)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 F4.2 arcsec/pix scale Scale of the image
25- 28 I4 --- Nx Number of pixels along X-axis
30- 33 I4 --- Ny Number of pixels along Y-axis
35- 38 I4 Kibyte size Size of FITS file
40- 60 A21 --- FileName Name of FITS file, in subdirectory fits
62-112 A51 --- Title Title of the FITS file
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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5- 21 F17.9 d Time Average BJD for a given K2 long-cadence
reconstructed exposure
25- 36 F12.8 mag M1det Detrended K2 magnitude obtained with 1-pixel
aperture photometry
40- 51 F12.8 mag M1raw Raw K2 magnitude obtained with 1-pixel
aperture photometry
55- 66 F12.8 mag M2det Detrended K2 magnitude obtained with 1.5-pixel
aperture photometry
70- 81 F12.8 mag M2raw Raw K2 magnitude obtained with 1.5-pixel
aperture photometry
85- 96 F12.8 mag M3det Detrended K2 magnitude obtained with 2-pixel
aperture photometry
100-111 F12.8 mag M3raw Raw K2 magnitude obtained with 2-pixel
aperture photometry
115-126 F12.8 mag M4det Detrended K2 magnitude obtained with 2.5-pixel
aperture photometry
130-141 F12.8 mag M4raw Raw K2 magnitude obtained with 2.5-pixel
aperture photometry
145-156 F12.8 mag MPSFdet Detrended K2 magnitude obtained with
PSF-fitting photometry
160-171 F12.8 mag MPSFraw Raw K2 magnitude obtained with
PSF-fitting photometry
175-186 F12.4 pix X x position in the corresponding K2
long-cadence reconstructed exposure
(in K2 pixel)
190-201 F12.4 pix Y y position in the corresponding K2
long-cadence reconstructed exposure
(in K2 pixel)
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History:
From electronic version of the journal
References:
Libralato et al., Paper I 2016MNRAS.456.1137L 2016MNRAS.456.1137L
Nardiello et al., Paper III 2016MNRAS.463.1831N 2016MNRAS.463.1831N, Cat. J/MNRAS/463/1831
(End) Patricia Vannier [CDS] 04-May-2018