J/A+A/675/A90 dE galaxies K-band images (Pinter+, 2023)
Deep K-band surface brightness photometry of dE galaxies.
I. Local Volume and Virgo cluster.
Pinter V., Vaduvescu O.
<Astron. Astrophys. 675, A90 (2023)>
=2023A&A...675A..90P 2023A&A...675A..90P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Photometry, infrared
Keywords: galaxies: dwarf - galaxies: elliptical and lenticular, cD -
galaxies: photometry - infrared: galaxies
Abstract:
Apparent physical parameters were derived for 39 Local Volume and
33 Virgo member dEs from deep NIR, Ks band imaging. The results were
obtained through surface brightness photometry with the "Galaxy
Photometry v2" (GPv2, github.co m/PVikii/GP.git ) Python program.
Physical parameters of 16 dEs were measured for the first time and
the measurements for 56 dEs were deeper than those available in the
literature (2MASS and CNG catalogues).
Description:
During this work, we collected and reduced deep Ks imaging for 74 dEs
based on available image archives (VISTA and CFHT/WIRCAM) adding our
own WHT observations.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
lv.dat 130 39 Local Volume members parameters (table A1)
virgo.dat 132 33 Virgo dEs members parameters (table A2)
list.dat 151 74 List of fits images
fits/* . 74 Individual fits images
--------------------------------------------------------------------------------
Byte-by-byte Description of file: lv.dat virgo.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- Name Galaxy name
26- 27 I2 h RAh Right ascension (J2000)
29- 30 I2 min RAm Right ascension (J2000)
32- 36 F5.2 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 49 F5.2 arcsec DEs Declination (J2000)
51- 56 F6.2 arcsec aT Semi major axis
58- 62 F5.2 arcsec e_aT rms uncertainty of aT
64- 69 F6.2 arcsec a20 Semi major axis until 20mag/arcsec isophote
71- 75 F5.2 mag KsmagT Total apparent magnitude
77- 80 F4.2 mag e_KsmagT rms uncertainty of KsmagT
82- 87 F6.3 mag Ksmag20 Apparent magnitude measured until
20mag/arcsec isophote
88- 93 F6.2 mag/arcsec2 magsky Isophotal magnitude at this limiting sky
background level
95- 98 F4.2 --- b/a Median ellipse semi-minor and semi-major
axes ratio
100-103 F4.2 --- e_b/a Uncertainty of b/a (lower value)
105-108 F4.2 --- E_b/a Uncertainty of b/a (upper value)
110-116 F7.1 deg PA [] Median position angle
118-123 F6.2 deg e_PA Uncertainty of PA (lower value)
124-128 F5.1 deg E_PA Uncertainty of PA (upper value)
130-132 A3 --- Flag [01234, ] Flag (1)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
0 = suggesting single nucleated core
1 = a close knot to the core
2 = late-type structures
3 = target crowded with overlapping objects
4 = for non nucleated center
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- Name Galaxy name
26- 27 I2 h RAh Right ascension (J2000)
29- 30 I2 min RAm Right ascension (J2000)
32- 36 F5.2 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 48 F4.1 arcsec DEs Declination (J2000)
50- 53 I4 --- Nx Number of pixels along X-axis
55- 58 I4 --- Ny Number of pixels along Y-axis
60- 82 A23 "datime" Obs.date Observation date
84- 88 I5 Kibyte size Size of FITS file
90-151 A62 --- FileName Name of FITS file, in subdirectory fits
--------------------------------------------------------------------------------
Acknowledgements:
Viktoria Pinter, viktoria.pinter94(at)gmail.com
(End) Patricia Vannier [CDS] 29-Jun-2023