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J/MNRAS/368/471     Berkeley 32 BVI photometry and spectroscopy (D'Orazi+, 2006)

The old anticentre open cluster Berkeley 32: membership and fundamental parameters. D'Orazi V., Bragaglia A., Tosi M., Fabrizio L.D., Held E.V. <Mon. Not. R. Astron. Soc., 368, 471-478 (2006)> =2006MNRAS.368..471D
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Radial velocities Keywords: Hertzsprung-Russell (HR) diagram - open clusters and associations: general - open clusters and associations: individual: Berkeley 32 Abstract: We have obtained medium- and low-resolution spectroscopy and BVI CCD imaging of Berkeley 32, an old open cluster which lies in the anticentre direction. From the radial velocities of 48 stars in the cluster direction, we found that 31 of them, in crucial evolutionary phases, are probable cluster members, with an average radial velocity of +106.7(sigma=8.5)km/s . From isochrone fitting to the colour-magnitude diagrams of Berkeley 32, we have obtained an age of 6.3Gyr, (m-M)0=12.48 and E(B-V)=0.10. The best fit is obtained with Z=0.008. A consistent distance, (m-M)0~=12.6±0.1, has been derived from the mean magnitude of red clump stars with confirmed membership; we may assume (m-M)0~=12.55±0.1. The colour-magnitude diagram of the nearby field observed to check for field stars contamination looks intriguingly similar to that of the Canis Major overdensity. Description: Our data were acquired at the Italian Telescopio Nazionale Galileo, on the Canary Islands, using DOLORES (device optimized for the low resolution), a focal reducer capable of imaging and low-resolution spectroscopy, on UT 2000 November 26 and 2004 February 14. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table.dat 92 2031 BVI photometry (from WEBDA) table4.dat 80 47 Radial velocities of stars in Be 32
Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 4 I4 --- DBT Star sequential number, Cl* Berkeley 32 DBT NNNN in Simbad 6- 11 F6.3 mag Bmag ?=99.999 Johnson B magnitude 13- 17 F5.3 mag e_Bmag ?=9.999 rms uncertainty on Bmag 19- 24 F6.3 mag Vmag1 ?=99.999 Johnson V magnitude calculated from B-V colour index 26- 31 F6.3 mag Vmag2 ?=99.999 Johnson V magnitude calculated from V-I colour index 33- 37 F5.3 mag e_Vmag ?=9.999 rms uncertainty on Vmag 39- 44 F6.3 mag Imag ?=99.999 Cousins I magnitude 46- 50 F5.3 mag e_Imag ?=9.999 rms uncertainty on Imag 52- 59 F8.3 pix Xpos X position 61- 68 F8.3 pix Ypos Y position 70 I1 h RAh Right ascension (J2000) 72- 73 I2 min RAm Right ascension (J2000) 75- 80 F6.3 s RAs Right ascension (J2000) 82 A1 --- DE- Declination sign (J2000) 83 I1 deg DEd Declination (J2000) 85- 86 I2 arcmin DEm Declination (J2000) 88- 92 F5.2 arcsec DEs Declination (J2000)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- DBT Star sequential number, Cl* Berkeley 32 DBT NNNN in Simbad 6- 8 I3 --- KM ? Kaluzny & Mazur (1991AcA....41..167K) number, Cl* Berkeley 32 KM NNN in Simbad 10- 13 I4 --- RS ? Richtler & Sagar (2001BASI...29...53R) number, Cl* Berkeley 32 RS NNNN in Simbad 15 I1 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 25 F6.3 s RAs Right ascension (J2000) 27 A1 --- DE- Declination sign (J2000) 28 I1 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 37 F5.2 arcsec DEs Declination (J2000) 39- 44 F6.2 km/s HRV Heliocentric radial velocity 46- 50 F5.2 km/s e_HRV Standard deviation from the mean HRV 52- 54 I3 km/s RVSFJ ? Scott et al. (1995AJ....109.1706S) radial velocity 56- 61 F6.3 mag Bmag Johnson B magnitude (1) 63- 68 F6.3 mag Vmag Johnson V magnitude (1) 70- 75 F6.3 mag Imag ? Cousins I magnitude (1) 77 A1 --- Mm [CF] Membership status: C for cluster member and F for field stars 79- 80 A2 --- Mask Mask number (M1 or M2)
Note (1): Magnitudes come from our catalogue (except for star 2689 - which we measured only in B and I- where B, V come from Kaluzny & Mazur, 1991AcA....41..167K).
History: * 10-May-2010: From electronic version of the journal * 08-Aug-2010: in table4, for DBT=18: KM=351 removed, following an annotation in Simbad about Cl* Berkeley 32 RS 1741
(End) Fabienne Woelfel, Patricia Vannier [CDS] 10-May-2010
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

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