Access to Astronomical Catalogues

← Click to display the menu
J/A+A/409/541       UBV photometry of IC 2395                (Claria+, 2003)

IC 2395 and BH 47: only one open cluster in the Vela constellation Claria J.J., Lapasset, E., Piatti, A.E., Ahumada, A.V. <Astron. Astrophys. 409, 541 (2003)> =2003A&A...409..541C
ADC_Keywords: Clusters, open ; Photometry, UBV Keywords: methods: observational - techniques: photometric - stars: fundamental parameters - open clusters and associations: individual: IC 2395, BH 47 Abstract: We report UBV photoelectric photometry for 273 stars in the fields of the open clusters IC 2395 and BH 47. Our postulate is that, rather than two different clusters in this region of Vela, there is only one, which we call IC 2395 = BH 47. The cluster is centered at about RA = 8h 42min 33s, and DE = -48° 06' 48" (2000), its angular diameter being ∼19'. The analysis of the photometric data yields 61 probable cluster members and 16 possible members. Photometric membership probabilities show good agreement with those obtained from a proper motion study for 21 stars in common. The reddening across the cluster appears to be uniform, the mean E(B-V) value being 0.09±0.02. The true distance modulus is V0-Mv=9.52±0.10, corresponding to a distance from the Sun of (800±40)pc and 48pc below the Galactic plane. The cluster age, determined by fitting isochrones with core overshooting, turns out to be (6±2)Myr. There is a strong likelihood that IC 2395 = BH 47 is physically connected to the Vela OB1C association. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 08 42 33 -48 06 48 IC 2395 = Cl VDBH 47 ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 93 273 UBV photometry and coordinates cross.dat 101 273 Positions and cross-identifications with high-accuracy astrometry
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 -- Seq Star number 5- 7 I3 pix Xpos X coordinates 9- 11 I3 pix Ypos Y coordinates 13- 14 I2 h RAh Hours of Right Ascension (J2000) 16- 17 I2 min RAm Minutes of Right Ascension (J2000) 19- 20 I2 s RAs Seconds of Right Ascension (J2000) 22 A1 --- DE- Declination sign (J2000) 23- 24 I2 deg DEd Degrees of declination (J2000) 26- 27 I2 arcmin DEm Minutes of declination (J2000) 29- 30 I2 arcsec DEs Seconds of declination (J2000) 32- 37 F6.3 mag Vmag V magnitude 39- 44 F6.3 mag B-V (B-V) colour index 46- 51 F6.3 mag U-B (U-B) colour index 53 I1 -- o_Vmag Number of measurements 55- 75 A21 -- Name Names in different catalogs 77- 87 A11 -- SpType Spectral type and luminosity class 89- 90 A2 -- Member [PNM ] Membership status (M, PM, NM) 92- 93 I2 % PMemb ? Membership probability
Byte-by-byte Description of file: cross.dat
Bytes Format Units Label Explanations
1- 3 I3 -- Seq Star number, as in table1.dat 6- 7 I2 h RAh Right Ascension J2000 (hours) 9- 10 I2 min RAm Right Ascension J2000 (minutes) 12- 16 F5.2 s RAs Right Ascension J2000 (seconds) 18 A1 --- DE- Declination J2000 (sign) 19- 20 I2 deg DEd Declination J2000 (degrees) 22- 23 I2 arcmin DEm Declination J2000 (minutes) 25- 28 F4.1 arcsec DEs Declination J2000 (seconds) 30 A1 --- r_Pos [MTU] Source of the position (1) 32- 40 A9 --- GSC Designation in GSC (I/254) 42- 52 A11 --- Tycho-2 Designation in Tycho-2 (I/259) 55- 60 F6.3 mag Vmag V magnitude 62- 67 F6.3 mag B-V (B-V) colour index 71- 82 A12 -- Name Names in HD or Durchmusterungen 84-101 A18 -- Remarks Remarks from B. Skiff
Note (1): Source of position is: M = 2MASS (II/246) T = Tycho-2 (2000A&A...357..367H, Cat. I/259) U = UCAC1 (2000AJ....120.2131Z, Cat. I/268)
Acknowledgements: Juan J. Claria History: * 28-Jul-2003: First version, with table1.dat only * 20-Oct-2003: Addition of cross.dat, from B. Skiff (Lowell Obs.)
(End) Patricia Bauer [CDS] 28-Jul-2003
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact