J/AJ/124/3222 VI photometry of Draco and UMi galaxies (Bellazzini+, 2002)
The Draco and Ursa Minor dwarf spheroidal galaxies: a comparative study.
Bellazzini M., Ferraro F.R., Origlia L., Pancino E., Monaco L., Oliva E.
<Astron. J. 124, 3222 (2002)>
=2002AJ....124.3222B 2002AJ....124.3222B
ADC_Keywords: Galaxies, photometry ; Stars, variable
Keywords: dark matter - galaxies: dwarf - galaxies: fundamental parameters -
galaxies: individual (Draco, Ursa Minor) - galaxies: stellar content -
galaxies: structure - Local Group
Abstract:
We present (V, I) photometry of two wide (∼25x25arcmin2) fields
centered on the low surface brightness dwarf spheroidal galaxies Draco
and Ursa Minor. New estimates of the distance to these galaxies are
provided [(m-M)0(UMi)=19.41±0.12 and (m-M)0(Dra)=19.84±0.14],
and a comparative study of their evolved stellar population is
presented.
Description:
The data were obtained at the 3.52m Italian telescope Telescopio
Nazionale Galileo (TNG; Roque de los Muchachos, La Palma, Canary
Islands, Spain) using DoLoRes, a focal reducer imager/spectrograph
equipped with a 2048x2048 pixel thinned and back-illuminated Loral
CCD array. The observations were carried out during three nights (2001
March 19, 20, and 21) under average seeing conditions
(FWHM∼1.0"-1.4"). The first and third nights of the run were
photometric. The scientific exposures taken during the second night
were calibrated indirectly by using the data acquired in the
photometric nights.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 4439 Photometry and positions of stars in Ursa Minor
table2.dat 90 4586 Photometry and positions of stars in Draco
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See also:
J/AJ/90/2221 : UMi dwarf galaxy BV photometry (Olszewski+, 1985)
J/AJ/110/2131 : M/L for Draco and UMi. I. (Armandroff+ 1995)
J/AJ/121/841 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2001)
J/AJ/123/2511 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2002)
J/MNRAS/330/792 : Radial velocity in Draco (Kleyna+, 2002)
J/ApJS/145/245 : SDSS stars in Draco dwarf spheroidal galaxy (Rave+, 2003)
J/AJ/127/861 : RR Lyrae in Draco dSph (Bonanos+, 2004)
Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID Variable identification number (1)
8- 13 F6.3 mag Vmag The V band magnitude
16- 20 F5.3 mag e_Vmag The error in Vmag
23- 28 F6.3 mag Imag The I band magnitude
31- 35 F5.3 mag e_Imag The error in Imag
37- 44 F8.2 pix Xpix The X pixel coordinate
46- 53 F8.2 pix Ypix The Y pixel coordinate
56- 57 I2 h RAh Degree of Right Ascension (J2000)
59- 60 I2 min RAm Minute of Right Ascension (J2000)
62- 67 F6.3 s RAs Second of Right Ascension (J2000)
69 A1 --- DE- Declination sign
70- 71 I2 deg DEd Degree of Declination (J2000)
73- 74 I2 arcmin DEm Arcminute of Declination (J2000)
76- 81 F6.3 arcsec DEs Arcsecond of Declination (J2000)
83 I1 --- VType [0/4] Variable type (2)
85- 86 I2 --- [NWM88] ? UMi variable number [NWM88] VNNN, from
Nemec et al. (1988AJ.....96..528N 1988AJ.....96..528N)
88- 90 I3 --- BASV ? Draco Variable number, BASV NNN, from
Baade & Swope (1961AJ.....66..300B 1961AJ.....66..300B)
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Note (1): [BFO2002] UMi NNNNN for table1.dat, [BFO2002] Dra NNNNN for table2.dat
Note (2): Variable type:
1 = RRab
2 = RRc
3 = Anomalous Cepheid
0 = Unclassified
For UMi data: Variable types from Nemec et al. (1988AJ.....96..528N 1988AJ.....96..528N)
For Draco data: Only the known anomalous Cepheid V141 is flagged with
VType = 3, else VType = 0
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History:
* 06-Feb-2003: From electronic version of the journal
* 03-Dec-2004: The following modifications were performed on table2:
BASV 29 attached to ID=10895 (was attached to ID=11773)
BASV 37 attached to ID=10836 (was attached to ID=10856)
BASV 106 attached to ID=10957 (was attached to ID=61735)
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 06-Feb-2003