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J/A+A/375/863                Photometry in NGC 2516            (Jeffries+, 2001)

Photometry and membership for low mass stars in the young open cluster NGC 2516 Jeffries R.D., Thurston M.R., Hambly N.C. <Astron. Astrophys. 375, 863 (2001)> =2001A&A...375..863J
ADC_Keywords: Clusters, open ; Photometry Keywords: open clusters and associations: individual: NGC 2516 - stars: mass function, luminosity function - binaries: general Abstract: We present the results of a 0.86 square degree CCD photometric survey of the open cluster NGC 2516, which has an age of about 150Myr and may have a much lower metallicity than the similarly-aged Pleiades. Our BVIc survey of cluster members is complete to V∼20 and is used to select a preliminary catalogue of 1254 low mass (0.<M<2.0M) cluster candidates, of which about 70-80 percent are expected to be genuine. After applying corrections for contamination by non-members and adding data for higher mass stars from the literature, we investigate the cluster binarity, luminosity and mass function, mass segregation and total mass. We find a binary fraction of 26±5%, for A to M-type systems with mass ratios between 0.6 and 1, which is very similar to the Pleiades. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 73 15495 The photometric catalogue for NGC 2516
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 I5 --- ID Star number 8- 9 I2 h RAh Right ascension (J2000) 11- 12 I2 min RAm Right ascension (J2000) 14- 19 F6.3 s RAs Right ascension (J2000) 22 A1 --- DE- Declination sign 23- 24 I2 deg DEd Declination (J2000) 26- 27 I2 arcmin DEm Declination (J2000) 29- 33 F5.2 arcsec DEs Declination (J2000) 36- 41 F6.3 --- Vmag V magnitude 44- 49 F6.3 --- B-V ?=-9.999 B-V colour index (1) 52- 57 F6.3 --- V-I ?=-9.999 V-I (Cousins) colour index (1) 60- 61 I2 --- F1 [-1/1] V vs B-V membership flag (2) 63- 64 I2 --- F2 [-1/1] V vs V-I membership flag (2) 66- 67 I2 --- F3 [-1/1] B-V vs V-I membership flag (2) 69- 70 I2 --- F4 [-1/1] Candidate membership flag (3) 73 I1 --- F5 [0/1] Binarity flag (4)
Note (1): A value of -9.999 indicates that the value is unavailable for this star. Note (2): Refers to the tests outlined in Sect. 3.3. Flag is set to 1 if the star passes the test, -1 if it fails or 0 if there is insufficient information to apply the test. Note (3): A star is flagged with a 1 if it is a candidate member because it has not failed either of the three membership tests, or is flagged with a -1 if it has failed one or more of the tests and is classed as a non-member. Note (4): A candidate member (see note 2) is flagged with a 1 if it is a potential unresolved binary system, or 0 otherwise.
Acknowledgements: Rob Jeffries
(End) Patricia Bauer [CDS] 27-Aug-2001
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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