J/A+A/677/A100 M31 PHAT clusters aperture photometry (Krisciunas+, 2023)
Deriving physical parameters of unresolved star clusters.
VII. Adaptive aperture photometry of the M31 PHAT star clusters.
Krisciunas E., Daugevicius K., Stonkute R., Vansevicius V.
<Astron. Astrophys. 677, A100 (2023)>
=2023A&A...677A.100K 2023A&A...677A.100K (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry, HST ;
Optical ; Infrared ; Ultraviolet
Keywords: galaxies: star clusters: general -
galaxies: star clusters: individual: M31
Abstract:
This work is the seventh study in a series dedicated to investigating
degeneracies of simultaneous age, mass, extinction, and metallicity
determinations of partially resolved or unresolved star clusters with
Hubble Space Telescope broadband aperture photometry. In the sixth
work (Naujalis et al., 2021A&A...654A...6N 2021A&A...654A...6N, Cat. J/A+A/654/A6), it was
demonstrated that the adaptive aperture photometry, performed to avoid
the majority of the projected foreground and background stars falling
within the apertures, gives more consistent colour indices for star
clusters.
In this study, we aim to supplement the multi-colour aperture
photometry results published by Naujalis et al. (2021A&A...654A...6N 2021A&A...654A...6N,
Cat. J/A+A/654/A6) and provide a complete M31 PHAT survey of star
cluster photometry catalogue for further analysis.
Following Naujalis et al. (2021A&A...654A...6N 2021A&A...654A...6N, Cat. J/A+A/654/A6), we
used a two-aperture approach for photometry. The standard aperture is
the one used to measure total cluster fluxes. The smaller aperture is
introduced to avoid the bright foreground and background stars
projecting onto the clusters. We selected the radii of smaller
apertures to be larger than the half-light radii of the clusters.
Here we present the second part of the star cluster aperture
photometry catalogue for a sample of 1477 star clusters from the M31
PHAT survey not covered in Naujalis et al. (2021A&A...654A...6N 2021A&A...654A...6N, Cat.
J/A+A/654/A6), Compared to the M31 PHAT star cluster aperture
photometry catalogue published by Johnson et al. (2015ApJ...802..127J 2015ApJ...802..127J,
Cat. J/ApJ/802/127), adjustments were made to the cluster centre
coordinates, aperture sizes, and sky background levels.
Description:
We performed multi-colour aperture photometry of 1477 star
clusters from the M31 galaxy PHAT survey (Dalcanton et al.,
2012ApJS..200...18D 2012ApJS..200...18D; Johnson et al. 2012ApJ...752...95J 2012ApJ...752...95J, Cat.
J/ApJ/752/95, 2015ApJ...802..127J 2015ApJ...802..127J, Cat. J/ApJ/802/127). We used two
variants of photometry by applying standard (T) and adaptive (C)
apertures. The T and C aperture photometry results for all (1477)
clusters are presented in Tables 1 and 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 123 1477 M31 star cluster T aperture photometry results
table2.dat 123 1477 M31 star cluster C aperture photometry results
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See also:
J/ApJ/802/127 : PHAT stellar cluster survey. II. AP catalog (Johnson+, 2015)
J/A+A/602/A112 : M31 PHAT star clusters (de Meulenaer+, 2017)
J/A+A/654/A6 : Aperture photometry of the M31 PHAT clusters (Naujalis+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- APID Cluster identification number in PHAT (G1)
7- 16 F10.6 deg RAdeg Right ascension (J2000)
18- 27 F10.6 deg DEdeg Declination (J2000)
30- 33 F4.2 arcsec RT Radius of the Total (T) aperture
36- 41 F6.3 mag F275W Magnitude F275W
44- 49 F6.3 mag F336W Magnitude F336W
52- 57 F6.3 mag F475W Magnitude F475W
60- 65 F6.3 mag F814W Magnitude F814W
68- 73 F6.3 mag F110W ? Magnitude F110W
76- 81 F6.3 mag F160W ? Magnitude F160W
84- 88 F5.3 mag e_F275W Error of the F275W magnitude
91- 95 F5.3 mag e_F336W Error of the F336W magnitude
98-102 F5.3 mag e_F475W Error of the F475W magnitude
105-109 F5.3 mag e_F814W Error of the F814W magnitude
112-116 F5.3 mag e_F110W ? Error of the F110W magnitude
119-123 F5.3 mag e_F160W ? Error of the F160W magnitude
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- APID Cluster identification number in PHAT (G1)
7- 16 F10.6 deg RAdeg Right ascension (J2000)
18- 27 F10.6 deg DEdeg Declination (J2000)
30- 33 F4.2 arcsec RC Radius of the Colour (C) aperture
36- 41 F6.3 mag F275W Magnitude F275W
44- 49 F6.3 mag F336W Magnitude F336W
52- 57 F6.3 mag F475W Magnitude F475W
60- 65 F6.3 mag F814W Magnitude F814W
68- 73 F6.3 mag F110W ? Magnitude F110W
76- 81 F6.3 mag F160W ? Magnitude F160W
84- 88 F5.3 mag e_F275W ? Error of the F275W magnitude
91- 95 F5.3 mag e_F336W Error of the F336W magnitude
98-102 F5.3 mag e_F475W Error of the F475W magnitude
105-109 F5.3 mag e_F814W Error of the F814W magnitude
112-116 F5.3 mag e_F110W ? Error of the F110W magnitude
119-123 F5.3 mag e_F160W ? Error of the F160W magnitude
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Global notes:
Note (G1): From Johnson et al. (2015ApJ...802..127J 2015ApJ...802..127J, Cat. J/ApJ/802/127),
[JSD2015] AP NNNNN in Simbad, except for 60239, 61782 and 63306.
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Acknowledgements:
Vladas Vansevicius, vladas.vansevicius(at)ftmc.lt
References:
de Meulenaer et al., Paper I 2013A&A...550A..20D 2013A&A...550A..20D
de Meulenaer et al., Paper II 2014A&A...569A...4D 2014A&A...569A...4D
de Meulenaer et al., Paper III 2015A&A...574A..66D 2015A&A...574A..66D
de Meulenaer et al., Paper IV 2015A&A...581A.111D 2015A&A...581A.111D
de Meulenaer et al., Paper V 2017A&A...602A.112D 2017A&A...602A.112D, Cat. J/A+A/602/112
Naujalis et al., Paper VI 2021A&A...654A...6N 2021A&A...654A...6N, Cat. J/A+A/654/A6
(End) Patricia Vannier [CDS] 01-Sep-2023