J/ApJS/193/12 JHK photometry of Northern Galactic Cepheids (Monson+, 2011)
Near-infrared (JHK) photometry of 131 Northern Galactic classical Cepheids.
Monson A.J., Pierce M.J.
<Astrophys. J. Suppl. Ser., 193, 12 (2011)>
=2011ApJS..193...12M 2011ApJS..193...12M
ADC_Keywords: Stars, variable ; Photometry, infrared
Keywords: infrared: stars - stars: variables: Cepheids
Abstract:
Near-infrared photometric measurements for 131 Northern Galactic
Cepheids are presented. The Cepheid light curves are sampled with an
average of 22 measurements per star fully covering the phase of each
Cepheid. The J, H, and K light curves for each Cepheid were uniformly
interpolated to find the intensity mean magnitudes within each band.
The results are consistent within ±1% for 26 stars in common with
previous studies. This paper is the first in a projected series of two
papers which will provide additional fundamental data for Cepheids in
the Galaxy, namely, NIR photometry and line-of-sight extinction. In
the course of this project, 93 additional variables were fortuitously
observed within the Cepheid program fields, 82 of which have
previously not been identified.
Description:
All observations were obtained during a 10 month span in 2008 at the
University of Wyoming Red Buttes Observatory (RBO). Cepheids were
observed in 129 fields with the 0.6m telescope using BIRCAM (Buttes
Infra-Red CAMera), a near-infrared imaging camera with a 13' field of
view.
The sample was chosen from a catalog of 324 Fundamental Mode Galactic
Cepheids (FMGCs) compiled by Tammann et al. (2003, Cat. J/A+A/404/423).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 128 1705 Photometric data for fields stars, Cepheids and
other variables
table3.dat 67 3001 Photometric observations of Cepheids
table4.dat 82 132 Final summary of observed Cepheids and their
observed NIR magnitudes
table5.dat 64 93 Summary of serendipitous variables
table6.dat 64 1954 Photometric data for serendipitous variables
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2011)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+A/462/599 : JHKs photometry of LMC cluster Cepheids (Testa+, 2007)
J/A+A/404/423 : BVI photometry of Galactic Cepheids (Tammann+, 2003)
J/A+A/383/398 : Cepheids multiphotometry (Paturel+, 2002)
J/A+AS/143/211 : Galactic Cepheids BVRI photometry (Berdnikov+, 2000)
J/AJ/116/469 : VI photometry of galactic cepheids (Metzger+ 1998)
J/MNRAS/289/745 : Mira variables in NGC 6749 field (Rosino+, 1997)
J/AJ/113/2104 : UBV photometry of 163 stars around SU Cyg (Turner+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Star designation in field
<[MP2011] NNN FFFFFFFFF> in Simbad (1)
5- 13 A9 --- Field BIRCAM field name (1)
15- 16 I2 h RAh Hour of Right Ascension (J2000)
18- 19 I2 min RAm Minute of Right Ascension (J2000)
21- 25 F5.2 s RAs Second of Right Ascension (J2000)
27 A1 --- DE- Sign of the Declination (J2000)
28- 29 I2 deg DEd Degree of Declination (J2000)
31- 32 I2 arcmin DEm Arcminute of Declination (J2000)
34- 37 F4.1 arcsec DEs Arcsecond of Declination (J2000)
39- 44 F6.3 mag Jmag The BIRCAM J-band magnitude
46- 50 F5.3 mag e_Jmag Error in Jmag (2)
52- 57 F6.3 mag Hmag The BIRCAM H-band magnitude
59- 63 F5.3 mag e_Hmag Error in Hmag (2)
65- 70 F6.3 mag Kmag The BIRCAM K-band magnitude
72- 76 F5.3 mag e_Kmag Error in Kmag (2)
78- 79 I2 --- o_Jmag Number of observations in Jmag
81- 82 I2 --- o_Hmag Number of observations in Hmag
84- 85 I2 --- o_Kmag Number of observations in Kmag
87- 92 F6.3 mag Jmag2M The 2MASS J-band magnitude
94- 99 F6.3 mag Hmag2M The 2MASS H-band magnitude
101-106 F6.3 mag Ksmag2M The 2MASS Ks-band magnitude
108-128 A21 --- Note Note on the star identity (1)
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Note (1): Table 2 contains 1481 well-observed field stars, 131 Cepheids,
and 92 other variables; 82 of which are likely new discoveries.
Cepheids are identified in column Note by "Ceph <Name>"; other name of
identified variables are also provided there; finally "unclassified
variable" are also highlighted.
Note (2): Determined from the data (RMS/(nobs)^0.5).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cepheid identification
11- 21 F11.3 d HJD The Heliocentric Julian Date of measurement
23- 26 F4.2 --- Phase The Cepheid phase at observation
28- 33 F6.3 mag Jmag The BIRCAM J-band magnitude
35- 39 F5.3 mag e_Jmag Error in Jmag
41- 46 F6.3 mag Hmag The BIRCAM H-band magnitude
48- 52 F5.3 mag e_Hmag Error in Hmag
54- 59 F6.3 mag Kmag The BIRCAM K-band magnitude
61- 65 F5.3 mag e_Kmag Error in Kmag
67 I1 --- Qual ? Quality flag (1)
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Note (1): Flag as follows:
0 = J, H and K magnitudes were used to construct light-curve;
1 = J-band magnitude was omitted from constructed light-curve;
2 = H-band magnitude was omitted from constructed light-curve;
3 = J and H-band magnitudes were omitted from constructed light-curve ;
4 = K-band magnitude was omitted from constructed light-curve;
5 = J and K-band magnitudes were omitted from constructed light-curve;
6 = H and K-band magnitudes were omitted from constructed light-curve;
7 = J, H and K band magnitudes were omitted from constructed light-curve.
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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- 9 A9 --- Name Cepheid identification
11 A1 --- f_Name [*] Additional star (1)
13- 14 I2 h RAh 2MASS hour of right ascension (J2000)
16- 17 I2 min RAm 2MASS minute of right ascension (J2000)
19- 23 F5.2 s RAs 2MASS second of right ascension (J2000)
25 A1 --- DE- 2MASS declination sign (J2000)
26- 27 I2 deg DEd 2MASS degree of declination (J2000)
29- 30 I2 arcmin DEm 2MASS arcminute of declination (J2000)
32- 35 F4.1 arcsec DEs 2MASS arcsecond of declination (J2000)
37- 42 F6.4 [d] logP ? Logarithm of the period (2)
44- 49 F6.3 mag <Jmag> ? Intensity-weighted mean J-band magnitude
51- 55 F5.3 mag e_<Jmag> ? <Jmag> uncertainty (3)
57- 61 F5.3 mag <Hmag> ? Intensity-weighted mean H-band magnitude
63- 67 F5.3 mag e_<Hmag> ? <Hmag> uncertainty (3)
69- 73 F5.3 mag <Kmag> ? Intensity-weighted mean K-band magnitude
75- 79 F5.3 mag e_<Kmag> ? <Kmag> uncertainty (3)
81- 82 I2 --- Nobs Number of observations
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Note (1): the asterisk (*) indicates a star added by CDS, with 2MASS
position and number of observations, to match the photometric data
in table 3 (CE Cas and U Aql)
Note (2): The table is sorted by increasing period.
Note (3): Errors include the photometric calibration uncertainty and the
estimated Gaussian Local Estimation (GLOESS) averaging error.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Star designation in field (1)
<[MP2011] NNN FFFFFFFFF> in Simbad
5- 13 A9 --- Field BIRCAM field name (1)
15- 24 A10 --- OName Simbad other identification if available
25 A1 --- f_OName [abc] Object type (1)
27- 28 I2 h RAh 2MASS hour of right ascension (J2000)
30- 31 I2 min RAm 2MASS minute of right ascension (J2000)
33- 37 F5.2 s RAs 2MASS second of right ascension (J2000)
39 A1 --- DE- 2MASS declination sign (J2000)
40- 41 I2 deg DEd 2MASS degree of declination (J2000)
43- 44 I2 arcmin DEm 2MASS arcminute of declination (J2000)
46- 49 F4.1 arcsec DEs 2MASS arcsecond of declination (J2000)
51- 52 A2 --- l_Per [≥∼ ] Limit flag on Per
53- 62 F10.6 d Per Period (2)
64 I1 --- r_Per ? Period reference (3)
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Note (1): Type as follows:
a = Eclipsing binary.
b = Carbon star.
c = QX Cas, an eclipsing binary. No variability was detected in this work
which may confirm recent findings (Bonaro et al. 2009AAS...21343216B)
that it is no longer eclipsing.
Note (2): Subjective estimates of the periods were made by constructing
rough light curves and likely represent lower limits. For previously
identified variables, periods were taken from the literature.
Note (3): Reference as follows:
1 = Rosino et al. 1997, Cat. J/MNRAS/289/745;
2 = Pojmanski et al. 2006, Cat. II/264;
3 = Kjurkchieva et al. 2007MNRAS.382..835K 2007MNRAS.382..835K;
4 = Samus et al. 2009 (Cat. B/gcvs);
5 = Stephenson, 1992AJ....103..263S 1992AJ....103..263S.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Star designation in field
<[MP2011] NNN FFFFFFFFF> in Simbad
5- 13 A9 --- Field BIRCAM field name
15- 25 F11.3 d HJD Heliocentric Julian Date of measurement
27- 32 F6.3 mag Jmag The BIRCAM J-band magnitude
34- 38 F5.3 mag e_Jmag Error in Jmag (1)
40- 45 F6.3 mag Hmag The BIRCAM H-band magnitude
47- 51 F5.3 mag e_Hmag Error in Hmag (1)
53- 58 F6.3 mag Kmag The BIRCAM K-band magnitude
60- 64 F5.3 mag e_Kmag Error in Kmag (1)
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Note (1): Determined from the data (RMS/(nobs)^0.5).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Apr-2011