J/BaltA/14/41 BV(RI)C photometry of 4 S-type AGB (Adelman+, 2005)
BVRI photometry of the S-type asymptotic branch giant stars
RS Cnc, ST Her, OP Her, and HR Peg.
Adelman S.J., Dennis J.W.III
<Baltic Astron., 14, 41 (2005)>
=2005BaltA..14...41A 2005BaltA..14...41A
ADC_Keywords: Stars, variable ; Stars, giant ; Stars, S ; Photometry, UBVRI
Keywords: stars: AGB and post-AGB - stars: variable -
stars: individual: RS Cnc, ST Her, OP Her, HR Peg
Abstract:
We present FCAPT differential Johnson BV and Cousins RI photometry
and radial velocities of the S-type AGB stars RS Cnc, ST Her, OP Her
and HR Peg. We performed multiperiodic analyses of this photometry to
learn about the frequencies of variability. The B, V, R, and I light
curves are generally in phase. RS Cnc has periods of order 122 and
248 days. Repeating the analyses using our data with the extensive V
and R photometry of Percy et al. (2001PASP..113..983P 2001PASP..113..983P) shows several
periods near 248 days and a period near 135 days. The primary period
of ST Her appears to be about 144 days although it is manifested most
readily by its 103 day alias. OP Her and HR Peg exhibit periods,
respectively, of about 416 and 116 days and of 54 and 74 days. The
differences between our data set and the larger one of Percy et al.
(2001PASP..113..983P 2001PASP..113..983P) for RS Cnc raises important questions about
multiperiodic analyses for AGB stars.
Objects:
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RA (2000) DE Designation(s) (File)
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09 10 38.8 +30 57 47 RS Cnc (table2.dat)
17 56 48.5 +45 21 03 OP Her (table4.dat)
15 50 46.6 +48 28 59 ST Her (table6.dat)
22 54 35.6 +16 56 31 HR Peg (table8.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 68 215 Photometry of RS Cnc
table4.dat 68 172 Photometry of OP Her
table6.dat 68 98 Photometry of ST Her
table8.dat 68 188 Photometry of HR Peg
tablea.dat 122 16 Average photometry
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Byte-by-byte Description of file: table2.dat table4.dat table6.dat table8.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 19 F6.3 mag B(v-c) variable-comparison (v-c) Johnson B magnitude
21- 26 F6.3 mag B(ch-c) check-comparison (ch-c) Johnson B magnitude
28- 33 F6.3 mag V(v-c) variable-comparison (v-c) Johnson V magnitude
35- 40 F6.3 mag V(ch-c) check-comparison (ch-c) Johnson V magnitude
42- 47 F6.3 mag Rc(v-c) variable-comparison (v-c) Cousins R magnitude
49- 54 F6.3 mag Rc(ch-c) check-comparison (ch-c) Cousins R magnitude
56- 61 F6.3 mag Ic(v-c) variable-comparison (v-c) Cousins I magnitude
63- 68 F6.3 mag Ic(ch-c) check-comparison (ch-c) Cousins I magnitude
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Byte-by-byte Description of file: tablea.dat
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Bytes Format Units Label Explanations
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1 I1 --- Table [2-8] Table number with detailed photometry
3- 8 A6 --- Name Star name
10- 18 A9 --- Years Period of observation
20- 25 F6.3 mag Bmag1 Variable-comparison (v-c) Johnson B magnitude
27- 31 F5.3 mag e_Bmag1 rms uncertainty on Bmag1
33- 38 F6.3 mag Bmag2 Check-comparison (ch-c) Johnson B magnitude
40- 44 F5.3 mag e_Bmag2 rms uncertainty on Bmag2
46- 51 F6.3 mag Vmag1 Variable-comparison (v-c) Johnson V magnitude
53- 57 F5.3 mag e_Vmag1 rms uncertainty on Vmag1
59- 64 F6.3 mag Vmag2 Check-comparison (ch-c) Johnson V magnitude
66- 70 F5.3 mag e_Vmag2 rms uncertainty on Vmag2
72- 77 F6.3 mag Rcmag1 Variable-comparison (v-c) Cousins R magnitude
79- 83 F5.3 mag e_Rcmag1 rms uncertainty on Rcmag1
85- 90 F6.3 mag Rcmag2 Check-comparison (ch-c) Cousins R magnitude
92- 96 F5.3 mag e_Rcmag2 rms uncertainty on Rcmag2
98-103 F6.3 mag Icmag1 Variable-comparison (v-c) Cousins I magnitude
105-109 F5.3 mag e_Icmag1 rms uncertainty on Icmag1
111-116 F6.3 mag Icmag2 Check-comparison (ch-c) Cousins I magnitude
118-122 F5.3 mag e_Icmag2 rms uncertainty on Icmag2
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Acknowledgements: Saul Adelman, adelmans(at)adelal.citadel.edu
(End) Patricia Vannier [CDS] 27-Jan-2005