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 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
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File Summary:
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FileName Lrecl Records Explanations
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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
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Byte-by-byte Description of file: table3a.dat table3b.dat
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Bytes Format Units Label Explanations
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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)
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Note (1): Names:
For table3a, Identification number from FitzGerald et al.,
1979A&AS...37..351F 1979A&AS...37..351F, Cl Pismis 8 in Simbad
For table3b, Identification number from Claria, 1979Obs....99..202C 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
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Acknowledgements: Edgard Giorgi, egiorgi(at)fcaglp.fcaglp.unlp.edu.ar
(End) Patricia Vannier [CDS] 21-Feb-2005