J/A+AS/128/573 ubvy{Delta}a photometry of Renson stars (Maitzen+ 1998) ================================================================================ {Delta}-a and Stroemgren photometry of stars in the Renson-catalogue of Ap and Am stars Maitzen H.M., Pressberger R., Paunzen E. =1998A&AS..128..573M (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, Am ; Stars, Ap ; Photometry, uvby Keywords: stars: chemically peculiar - stars: early type Description: Results of 131 stars from Renson's (1991, Cat. ) catalogue of Ap and Am stars observed with the {Delta}-a system are presented. With few exceptions the probability division of Renson for membership in the CP2 group of peculiar stars is nicely reflected by peculiar values of {Delta}-a. Comparison with already available {Delta}-a values yields slightly larger values due to a minor shift in the g_1_ filter sampling the depression. For a description of the {Delta}-a and Stroemgren photometric system, see e.g. and , respectively. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 24 110 Comparison of our photometry with the literature table4.dat 62 131 Program Stars -------------------------------------------------------------------------------- See also: III/162 : General Catalogue of Ap and Am stars (Renson+ 1991) III/199 : Observed Periods of Ap and Bp stars (Catalano+ 1998) J/A+AS/121/57 : 4th supp. to the III/199 catalog (Catalano+ 1997) J/A+A/378/113 : 5th supp. to the III/199 catalog (Catalano+ 2001) Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- RNS Rensons number, as in Cat. 7- 12 I6 --- HD HD number (Cat. ) 14- 16 I3 mmag d(b-y) Difference of (b-y)_obs_ to the published values 18- 20 I3 mmag d(m1) Difference of (m1)_obs_ to the published values 22- 24 I3 mmag d(c1) Difference of (c1)_obs_ to the published values -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations ------------------------------------------------------------------------------- 1 I1 --- CP [0/4] CP class 3- 4 I2 --- Nobs Number of nights 6- 10 I5 --- RNS Rensons number, as in Cat. 12- 17 I6 --- HD HD number (Cat. ) 19- 21 F3.1 mag Vmag mag(V) from Renson (1991, Cat. ) 23- 25 I3 mmag b-y Observed b-y 27- 28 I2 mmag e_b-y Error of b-y 30- 32 I3 mmag m1 Observed m1 34- 35 I2 mmag e_m1 Error of m1 37- 40 I4 mmag c1 Observed c1 42- 43 I2 mmag e_c1 Error of c1 45- 47 I3 mmag Da Observed {Delta}a 49 I1 mmag e_Da Error of {Delta}a 51- 62 A12 --- SpType Spectral type from Renson (1991, Cat. ) -------------------------------------------------------------------------------- Acknowledgements: Ernst Paunzen ================================================================================ (End) Patricia Bauer [CDS] 05-Feb-1998