Access to Astronomical Catalogues

← Click to display the menu
J/AJ/134/825       BVI photometry in M55 (NGC 6809)         (Vargas+, 2007)

Evolved stars in the galactic globular cluster M 55 (NGC 6809). Vargas Alvarez C.A., Sandquist E.L. <Astron. J., 134, 825-834 (2007)> =2007AJ....134..825V
ADC_Keywords: Clusters, globular ; Photometry, UBVRI Keywords: globular clusters: individual (M55) - stars: abundances - stars: evolution - stars: horizontal-branch Abstract: We have compiled the asymptotic giant, horizontal, and upper red giant branch (AGB, HB, and RGB) stars in the globular cluster M55 (NGC 6809). Using the star counts and the R-parameter we compute the initial helium abundance Y=0.274±0.016. Description: The data were taken from several literature sources: Lee (1977A&AS...29....1L, L77), Mandushev et al. (1997AJ....114.1060M, M97), Olech et al. (1999AJ....118..442O, O99), Pych et al. (2001A&A...367..148P, P01), and Richter et al. (1999A&A...350..476R, R99). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 19 666 Stars list table2.dat 67 1988 The interior stars in M 55
Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 3 A3 --- ID Identification number from this study (1) 5- 11 F7.2 arcsec oRA Right Ascension offset from cluster center (2) 13- 19 F7.2 arcsec oDE Declination offset from cluster center (2)
Note (1): Stars classification is related to star ID: V1 to V13 = RR Lyr 1 to 268 = HB (horizontal branch) star 269 to 312 = AGB (asymptotic giant branch) 313 to 653 = RGB (red giant branch) Stars are identified in Simbad as Cl* NGC 6809 VS VNN and Cl* NGC 6809 VS NNN Note (2): The positions we tabulate are given in arcseconds from the center of the cluster (taken to be 19:39:49.40-30:47:43.5 (J2000.0)), with the x position being the RA offset and the y position being the DE offset (positive being higher RA and DE).
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- ID Identification number from this study (1) 5- 9 A5 --- ID2 Identification number from the original study 11- 16 F6.3 mag Bmag The B band magnitude (3) 18- 22 F5.3 mag e_Bmag ? Error in Bmag 24- 29 F6.3 mag Vmag The V band magnitude (3) 31- 35 F5.3 mag e_Vmag ? Error in Vmag 37- 42 F6.3 mag Imag ? The I band magnitude 44- 48 F5.3 mag e_Imag ? Error in Imag 50- 52 A3 --- Cat Catalog photometry (4) 54- 67 A14 --- Spc Star observed in other studies (5)
Note (1): The first row is the compilated photometry in scaled to the M97 photometry. The following rows with the same ID is the same star with the photometry detected in the original study. Note (3): The Stromgren photometry from Richter et al.(1999A&A...350..476R) was reported in the columns for the B and V band magnitudes. The Stromgren b band is listed under the B band, and the Stromgren y band is listed under the V band column. Note (4): Catalogues as follows: VS = Vargas Alvarez & Sandquist, this paper L77 = Lee (1977A&AS...29....1L) M97 = Mandushev et al. (1997AJ....114.1060M) O99 = Olech et al. (1999AJ....118..442O) P01 = Pych et al. (2001A&A...367..148P) R99 = Richter et al. (1999A&A...350..476R) Note (5): References as follows: B90 = Briley et al. (1990ApJ...359..307B) B93 = Briley et al. (1993AJ....106..142B) SN82 = Smith & Norris (1982ApJ...254..149S) W81 = Webbink (1981ApJS...45..259W)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Sep-2009
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