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J/A+A/432/491     CCD UBVIc photometry of Pismis 8 and Pismis 13 (Giorgi+, 2005)

The Vela-Puppis open clusters Pismis 8 and Pismis 13. Giorgi E.E., Baume G., Solivella G., Vazquez R.A. <Astron. Astrophys. 432, 491 (2005)> =2005A&A...432..491G
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD ; Photometry, Cousins Keywords: Galaxy: open clusters and associations: individual: Pismis 8, Pismis 13 - stars: luminosity function, mass function - stars: Hertzsprung-Russell (H-R) and C-M diagrams Abstract: CCD UBVIc imaging photometry was carried out in the fields of the open clusters Pismis 8 and Pismis 13, located in the Vela-Puppis region in our Galaxy. MK spectral types have also been determined for a number of stars located in the fields of these two clusters which were used to secure membership among the brightest stars. Since our photometry goes to a fainter limit than previous studies we could provide better reddening, distance and age determinations. Both clusters are located close to the edge of the local arm in the third quadrant. Pismis 8 is a cluster about 5-7My old located at 2000pc from the Sun, while Pismis 13 was found at 2750pc with a probable age of about 100My. The estimate of the slopes of the mass functions in both cases yielded x=1.7 and x=2.1 for Pismis 8 and 13 respectively. Description: CCD imaging photometry in the UBVI Cousins system was carried out in February 1996. Data were obtained with the 60-cm telescope of the University of Toronto Southern Observatory at Las Campanas Observatory, Chile, and a PM 512x512 METHACROME-II UV coated CCD. Pismis 8 was observed on February 23 and Pismis 13 on February 25. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 08 41 35.0 -46 16 24 Cl Pismis 8 09 22 07.0 -51 06 06 Cl Pismis 13 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3a.dat 51 104 Photometric catalogue of the Pismis 8 region table3b.dat 51 260 Photometric catalogue of the Pismis 13 region
Byte-by-byte Description of file: table3a.dat table3b.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Identification number (this work) 6- 8 I3 --- Name ? Identification number from Claria, or Fitzgerald et al. (1) 10- 15 F6.2 pix Xpos X position (2) 17- 22 F6.2 pix Ypos Y position (2) 24- 28 F5.2 mag Vmag V magnitude 29 A1 --- u_Vmag Uncertainty flag on V magnitude (3) 31- 34 F4.2 mag B-V B-V colour index 35 A1 --- u_B-V Uncertainty flag on B-V colour index (3) 37- 41 F5.2 mag U-B ? U-B colour index 42 A1 --- u_U-B Uncertainty flag on U-B colour index (3) 44- 47 F4.2 mag V-Ic ? V-Ic colour index 48 A1 --- u_V-Ic Uncertainty flag on V-Ic colour index (3) 50- 51 A2 --- Memb Membership assignment (4)
Note (1): Names: For table3a, Identification number from FitzGerald et al., 1979A&AS...37..351F, Cl Pismis 8 in Simbad For table3b, Identification number from Claria, 1979Obs....99..202C, Cl Pismis 13 NN in Simbad Note (2): 1 pix = 0.45". North is up, East is left. Note (3): Comments on photometry: : for error larger than 0.1mag Note (4): Membership assignment is coded as follows: m = member pm = probable member nm = non-member
Acknowledgements: Edgard Giorgi, egiorgi(at)
(End) Patricia Vannier [CDS] 21-Feb-2005
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