J/MNRAS/424/1113 VI photometry in Phoenix dwarf galaxy (Battaglia+, 2012)
A wide-area view of the Phoenix dwarf galaxy from Very Large Telescope/FORS
imaging.
Battaglia G., Rejkuba M., Tolstoy E., Irwin M.J., Beccari G.
<Mon. Not. R. Astron. Soc., 424, 1113-1131 (2012)>
=2012MNRAS.424.1113B 2012MNRAS.424.1113B
ADC_Keywords: Galaxies, nearby ; Photometry
Keywords: techniques: photometric - galaxies: evolution -
galaxies: individual: Phoenix - Local Group -
galaxies: stellar content - galaxies: structure
Abstract:
We present results from a wide-area photometric survey of the Phoenix
dwarf galaxy, one of the rare dwarf irregular/dwarf spheroidal
transition-type galaxies (dTs) of the Local Group (LG). These objects
offer the opportunity to study the existence of possible evolutionary
links between the late- and early-type LG dwarf galaxies, since the
properties of dTs suggest that they may be dwarf irregulars in the
process of transforming into dwarf spheroidals.
Using FORS at the Very Large Telescope (VLT), we have acquired VI
photometry of Phoenix. The data reach a signal-to-noise ratio (S/N)∼10
just below the horizontal branch of the system and consist of a mosaic
of images that covers an area of 26x26arcmin2 centred on the
coordinates of the optical centre of the galaxy.
Description:
The observations were carried out between 2009 June 20 and August 20
in service mode with the ESO VLT instrument FORS2 at UT1 (Antu). FORS2
is a focal reducer multimode instrument that can be used for optical
imaging, polarimetry, long-slit and multi-object spectroscopy.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 77 19286 Catalogue of bona fide stars from FORS photometry
of the Phoenix dwarf galaxy, including pointing 17
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See also:
J/MNRAS/296/839 : Phoenix Deep Survey: 1.4-GHz source counts (Hopkins+, 1998)
J/MNRAS/306/708 : The Phoenix Survey (Georgakakis+, 1999)
J/ApJ/624/135 : Phoenix Deep Survey spectroscopic catalog (Afonso+, 2005)
J/AJ/125/465 : Phoenix Deep Survey 1.4-GHz microJy Catalog (Hopkins+, 2003)
J/ApJS/155/1 : Phoenix Deep Survey: optical & NIR catalogs (Sullivan+ 2004)
J/MNRAS/385/1045 : Phoenix dwarf gal. JHKsIc photometry of AGB (Menzies+, 2008)
J/MNRAS/422/2302 : X-ray sources in the Phoenix dwarf galaxy (Bartlett+, 2012)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name (phxNNNNN)
10- 19 F10.7 deg RAdeg Right ascension (J2000)
21- 31 F11.7 deg DEdeg Declination (J2000)
33- 39 F7.4 mag Vmag FORS2 VHIGH magnitude
41- 46 F6.4 mag e_Vmag rms uncertainty on Vmag
48- 54 F7.4 mag Imag FORS2 IBess magnitude
56- 61 F6.4 mag e_Imag rms uncertainty on Imag
63- 69 F7.4 --- chi χ2 value
71- 77 F7.4 --- Sharp [-0.9/0.9] Sharpness parameter (0=stellar fit,
negative for too broad (galaxy),
positive for too sharp
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Apr-2013