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J/A+AS/125/65 uvby photometry of 4 CP stars (Adelman, 1997)
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uvby Photometry of the magnetic Chemically Peculiar Stars
HD 37776, HR 2258, HR 6958, and 108 Aquarii
Adelman S.J.
<Astron. Astrophys. Suppl. Ser. 125, 65 (1997)>
=1997A&AS..125...65A (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, peculiar ; Stars, early-type ; Photometry, uvby
Keywords: stars: individual: HD 37776 - stars: individual: HR 2258 -
stars: individual: HR 6958 - stars: individual: 108 Aqr -
stars: chemically peculiar - stars: variable
Abstract:
Differential Stroemgren uvby photometric observations from the Four
College Automated Photoelectric Telescope are presented for four
magnetic chemically peculiar stars. Comparison with uvby photometry of
Pedersen & Thomsen for HD 37776 yields an improved period of 1.538675
days. New periods of 15.0305 days and 18.065 days are found for the
sharp-lined stars HR 2258 and HR 6958, respectively, rather than one
of their aliases. For HR 6958 each color shows a slightly different
time of maximum. Comparison of the four color photometry of 108 Aqr
taken during the fall of 1995 which well covers the period shows the
presence of a secondary minimum near primary maximum in u, v, and b.
Comparison with published photometry indicates indicates that subtle
changes in the shapes of the light curves have occurred suggesting
that this star might be precessing.
Objects:
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RA (2000) DE Designation(s)
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05 40 56.3 -01 30 26 HD 37776 = V901 Ori
06 19 01.8 +17 19 31 HR 2258 = HD 43819 = V1155 Ori
18 32 06.8 +03 39 35 HR 6958 = HD 170973 = MV Ser
23 51 21.1 -18 54 33 108 Aqr = HD 223640 = HR 9031 = ET Aqr
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 68 42 uvby Photometry for HD 37776
table3 68 110 uvby Photometry for HR 2258
table4 68 377 uvby Photometry for HR 6958
table5 68 147 uvby Photometry for 108 Aqr
tablea 115 16 Average photometry
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See also:
J/A+AS/103/1 : 63 And, HD 192913, HR 8240 & 108 Aqr (Adelman+ 1994)
J/A+AS/106/333 : Alpha And, HD 184905, HR 8216 & HR 8434 (Adelman+ 1994)
J/A+AS/114/253 : HD11187, HD14940, HD15144, 20 Eri & HR8933 (Adelman+, 1995)
J/A+AS/122/249 : HD 32633, 25 Sex, HR 7224 & HD 200311 (Adelman, 1997)
J/PASP/109/9 : HR 1643, Theta Aur, 49 Cam, and HR 3724 (Adelman 1997)
J/A+AS/125/497 : Theta Vir and 109 Vir (Adelman 1997)
J/A+AS/133/197 : 33 Tau, HD 50169 and HR 7786 (Adelman+ 1998)
J/A+AS/134/53 : HD 15980, HR 1094, 33 Gem and HD 115708 (Adelman+ 1999)
J/A+AS/136/111 : HD 35298, 19 Lyr, HD 192678 and HR 8216 (Adelman 1999)
J/A+AS/136/379 : 45 Leo, HR 4330, 49 Her and HR 6718 (Adelman+ 1999)
Byte-by-byte Description of file: table2 table3 table4 table5
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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 umag1 Variable-comparison (v-c) u magnitude
21- 26 F6.3 mag umag2 Check-comparison (ch-c) u magnitude
28- 33 F6.3 mag vmag1 Variable-comparison (v-c) v magnitude
35- 40 F6.3 mag vmag2 Check-comparison (ch-c) v magnitude
42- 47 F6.3 mag bmag1 Variable-comparison (v-c) b magnitude
49- 54 F6.3 mag bmag2 Check-comparison (ch-c) b magnitude
56- 61 F6.3 mag ymag1 Variable-comparison (v-c) y magnitude
63- 68 F6.3 mag ymag2 Check-comparison (ch-c) y magnitude
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Byte-by-byte Description of file: tablea
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name
10- 15 A6 --- Per Period considered (1)
17- 22 F6.3 mag umag1 Variable-comparison (v-c) u magnitude
24- 28 F5.3 mag e_umag1 rms uncertainty on umag1
30- 34 F5.3 mag umag2 Check-comparison (ch-c) u magnitude
36- 40 F5.3 mag e_umag2 rms uncertainty on umag2
42- 47 F6.3 mag vmag1 Variable-comparison (v-c) v magnitude
49- 53 F5.3 mag e_vmag1 rms uncertainty on vmag1
55- 59 F5.3 mag vmag2 Check-comparison (ch-c) v magnitude
61- 65 F5.3 mag e_vmag2 rms uncertainty on vmag2
67- 72 F6.3 mag bmag1 Variable-comparison (v-c) b magnitude
74- 78 F5.3 mag e_bmag1 rms uncertainty on bmag1
80- 84 F5.3 mag bmag2 Check-comparison (ch-c) b magnitude
86- 90 F5.3 mag e_bmag2 rms uncertainty on bmag2
92- 97 F6.3 mag ymag1 Variable-comparison (v-c) y magnitude
99-103 F5.3 mag e_ymag1 rms uncertainty on ymag1
105-109 F5.3 mag ymag2 Check-comparison (ch-c) y magnitude
111-115 F5.3 mag e_ymag2 rms uncertainty on ymag2
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Note (1): For HD 37776 : year5: From 2449702.7198 to 2449797.6208
year6: From 2449990.9415 to 2450130.6660
For HR 2258 : year2: From 2448561.9920 to 2448705.6274
year3: From 2448938.9820 to 2449072.6335
year4: From 2449292.8755 to 2449424.6660
year5: From 2449646.9987 to 2449805.6279
year6: From 2450035.9458 to 2450175.6183
For HR 6958 : year1: From 2448333.0098 to 2448441.7875
year2: From 2448530.6068 to 2448808.7655
year3: From 2448873.6732 to 2449167.8855
year4: From 2449413.0234 to 2449548.7582
year5: From 2449548.7582 to 2449901.8472
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Acknowledgements: Saul J. Adelman <ADELMANS@adelvx.citadel.edu>
Historical notes: There were an inversion between the b and v magnitude labels.
This was corrected on 24-Apr-1998
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(End) Patricia Bauer [CDS] 20-Dec-1996