CDROM/AJ/V109/P0618 RR Lyrae Stars in NGC 5053 (Nemec+ 1995) ================================================================================ B,V Photometry of the RR Lyrae Stars in the Very Metal-Poor Globular Cluster NGC 5053 James M. Nemec, Mario Mateo & James M. Schombert <1995, AJ, 109, 618> =1995AJ....109..618N ================================================================================ Abstract: The RR Lyrae stars in NGC 5053 are investigated using B,V photometry derived from CCD frames taken on 15 nights between 1985 and 1994. Estimates of fundamental photometric parameters are presented for the ten stars, including mean B and V magnitudes, pulsation periods, pulsation amplitudes, - colors, and period change rates. Until now the mean B,V magnitudes were unknown because the previous photographic photometry by Baade [Mitteilungen der Hamburger, Sternwarte, B6, n.29 (1928)], Sawyer [Pub. DDO 1, No. 18, p. 357 (1946)], Rosino [MSAIt, 20, 3 (1949)], and Mannino [Pub. Obs. Bologna, 8, No. 12 (1963)] is not on the Johnson system and is not readily transformed to that system. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table1.dat 43 75 Photometry of the ab-type RR Lyrae star V1 table2.dat 43 84 Photometry of the c-type RR Lyrae star V2 table3.dat 43 75 Photometry of the ab-type RR Lyrae star V3 table4.dat 43 119 Photometry of the ab-type RR Lyrae star V4 table5.dat 43 15 Photometry of the ab-type RR Lyrae star V5 table6.dat 43 78 Photometry of the c-type RR Lyrae star V6 table7.dat 43 91 Photometry of the c-type RR Lyrae star V7 table8.dat 43 77 Photometry of the c-type RR Lyrae star V8 table9.dat 43 35 Photometry of the ab-type RR Lyrae star V9 table10.dat 43 124 Photometry of the c-type RR Lyrae star V10 table11.dat 123 10 Properties of the RR Lyrae stars in NGC 5053 table1.tex 71 152 TeX version of Table 1 table2.tex 70 152 TeX version of Table 2 table3.tex 74 147 TeX version of Table 3 table4.tex 63 208 TeX version of Table 4 table5.tex 73 60 TeX version of Table 5 table6.tex 72 146 TeX version of Table 6 table7.tex 72 159 TeX version of Table 7 table8.tex 77 143 TeX version of Table 8 table9.tex 76 78 TeX version of Table 9 table10.tex 73 219 TeX version of Table 10 table11.tex 78 82 TeX version of Table 11 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat table7.dat table8.dat table9.dat table10.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Night Observing night number 3-13 F11.4 d HJD *HJD (- 2440000) of midpoint of observation 14-21 F8.3 mag V []? V magnitude 22-28 F7.3 mag e_V *[]? Uncertainty in V 29-36 F8.3 mag B *[]? B magnitude 37-43 F7.3 mag e_B *[]? Uncertainty in B -------------------------------------------------------------------------------- Notes for file: table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat table7.dat table8.dat table9.dat table10.dat -------------------------------------------------------------------------------- HJD: The mid-HJD of each exposure was computed using M. Fletcher's (Dominion Astrophysical Observatory) REDSUN program. B: In file table3.dat, night 17, HJD 8416.7570, the B magnitude was derived from I through a V-I,B-V transformation. e_V, e_B: The uncertainties are lower limits since they are the quantities returned by the photometry programs and do not include the systematic zero-point uncertainties introduced by the transformation from instrumental to standard magnitudes. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table11.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- Star Star number, V1 to V10 4- 5 2X --- --- Blank 6- 7 A2 --- l_P [>=] In one case, V10, this is '>=' 8-15 F8.6 d P Pulsation period for the current epoch 16-21 F6.2 10-9d/d Beta Period rate change = delta P / delta t 22 1X --- --- Blank 23-24 A2 --- Type Bailey type 25-30 F6.2 mag Bmin B magnitude at minimum light 31-35 F5.2 mag e_Bmin *Uncertainty in Bmin 36-41 F6.2 mag Bmax B magnitude at maximum light 42-46 F5.2 mag e_BMax *Uncertainty in Bmax 47-52 F6.2 mag AB B amplitude 53-57 F5.2 mag e_AB Uncertainty in AB, based on e_Bmin,e_Bmax 58-63 F6.2 mag Vmin V magnitude at minimum light 64-68 F5.2 mag e_Vmin *Uncertainty in Vmin 69-74 F6.2 mag Vmax V magnitude at maximum light 75-79 F5.2 mag e_Vmax *Uncertainty in Vmax 80-85 F6.2 mag AV V amplitude 86-90 F5.2 mag e_AV Uncertainty in AV, based on e_Vmin,e_Vmax 91-96 F6.2 mag Intensity mean magnitude 97-101 F5.2 mag e_ Uncertainty in 102-107 F6.2 mag Intensity mean magnitude 108-112 F5.2 mag e_ Uncertainty in 113-118 F6.2 mag - Intensity mean - color 119-123 F5.2 mag e_- Uncertainty in - -------------------------------------------------------------------------------- Notes for file: table11.dat -------------------------------------------------------------------------------- e_Bmin, e_Bmax, e_Vmin, e_Vmax: Uncertainties in minimum and maximum magnitudes are subjective estimates based on the number and quality of the observations. -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 02-May-1995