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J/A+A/534/A114         UBV photometry in RCW173                   (Marco+, 2011)

An obscured cluster associated with the HII region RCW173. Marco A., Negueruela I. <Astron. Astrophys. 534, A114 (2011)> =2011A&A...534A.114M
ADC_Keywords: Clusters, open ; Photometry, UBV Keywords: techniques: photometric - methods: observational - Hertzsprung-Russell and C-M diagrams - Galaxy: stellar content - open cluster and associations: individual: Alicante 6 - techniques: imaging spectroscopy Abstract: The discovery of several clusters of red supergiants towards l=24°-30° has triggered interest in this area of the Galactic plane, where lines of sight are very complex and previous explorations of the stellar content were very preliminary. We attempt to characterise the stellar population associated with the HII region RCW 173 (=Sh2-60), located at l=25.3°, as previous studies have suggested that this population could be beyond the Sagittarius arm. Description: UBV photometry for roughly 600 stars in the vicinity of the HII region RCW 173 obtained with the Nordic Optical Telescope (La Palma) and reduced with IRAF version of DAOPHOT. The stars are distributed in three partially overlapping frames (A, B and C). Table 2 contains stars in frame A. Table 3 contains stars in frame B. Table 4 contains stars in frame C. Stars present in more than one frame are listed only once. We list X and Y positions with respect to each frame shown in Fig. 1 for all the stars in each frame, and their identification with objects in the 2MASS catalogue, together with their coordinates (right ascension (RA) and declination (DEC) in J2000). A few stars have no obvious corresponding source in the 2MASS catalogue. We identified these objects in the GLIMPSE catalogue (Benjamin et al., 2003PASP..115..953B) and assume their RA and DEC coordinates to be those assigned in this catalogue. A few stars have no counterparts in any of the two catalogues. The designation of each star is given by the letter that identifies the frame on which it is detected, plus a sequential number. Stars observed in more than one frame receive the designation corresponding to the frame with the highest number of measurements. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 108 322 (X,Y) position on the map A of stars with photometry in the field. table3.dat 108 99 (X,Y) position on the map B of stars with photometry in the field. table4.dat 108 176 (X,Y) position on the map C of stars with photometry in the field.
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) : GLIMPSE HomePage Byte-by-byte Description of file: table2.dat table3.dat table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Name Name (stars by the map ID A, B or C) 6- 13 F8.3 pix Xpos X Position (in pixels) 15- 22 F8.3 pix Ypos Y Position (in pixels) 24- 29 F6.3 mag Vmag V magnitude 31- 35 F5.3 mag e_Vmag V magnitude standard deviation 37- 42 F6.3 mag B-V (B-V) colour index 44- 48 F5.3 mag e_B-V (B-V) colour standard deviation 50- 55 F6.3 mag U-B (U-B) colour index 57- 61 F5.3 mag e_U-B (U-B) colour standard deviation 63- 64 I2 --- N Number of the photometric measures 66- 67 I2 h RAh ? Right Ascension in coordinates J2000 69- 70 I2 min RAm ? Right Ascension in coordinates J2000 72- 77 F6.3 s RAs ? Right Ascension in coordinates J2000 79 A1 --- DE- Declination sign in coordinates J2000 80- 81 I2 deg DEd ? Declination in coordinates J2000 83- 84 I2 arcmin DEm ? Declination in coordinates J2000 86- 90 F5.2 arcsec DEs ? Declination in coordinates J2000 92-108 A17 --- OName Name in the 2MASS (HHMMSSss+DDMMSSs) catalogue or GLIMPSE catalogue (GHHMMSSss+DDMMSSs)
Acknowledgements: Amparo Marco, Amparo.Marco(at)
(End) Patricia Vannier [CDS] 05-Sep-2011
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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