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J/A+AS/125/497 Theta Vir and 109 Vir uvby photometry (Adelman 1997)
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On the possible variability of the main sequence A stars
theta Virginis and 109 Virginis
Adelman S.J.
<Astron. Astrophys. Suppl. Ser. 125, 497 (1997)>
=1997A&AS..125..497A (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, dwarfs ; Stars, A-type ; Photometry, uvby
Keywords: stars: individual: theta Vir , 109 Vir ; stars: variables: other
Abstract:
Differential Stroemgren uvby photometric observations from the Four
College Automated Photoelectric Telescope are used to examine the
possible variability of the spectrophotometric standards {theta} Vir
and 109 Vir. No evidence is found for variability within a season of
observation. Small year to year differences are most likely due to
unaccounted for extinction changes.
Objects:
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RA (2000) DE Designation(s)
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13 09 57.0 -05 32 18 theta Vir = HD 114330
14 46 15.2 +01 53 36 * 109 Vir = HD 130109
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 77 231 uvby Photometry of Theta Vir
table2b 77 64 Examination of Data on Nights for Theta Vir
table3 77 380 uvby Photometry of 109 Vir
table3b 77 202 Examination of Data on Nights for 109 Vir
tablea 119 51 Averaged values
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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 : HD 11187, HD 14940, HD 15144, 20 Eri, HR 8933 (Adelman+ 1995)
J/A+AS/122/249 : HD 32633, 25 Sex, HR 7224 & HD 200311 (Adelman, 1997)
J/A+AS/125/65 : HD 37776, HR 2258, HR 6958 & 108 Aqr (Adelman, 1997)
J/PASP/109/9 : HR 1643, Theta Aur, 49 Cam, and HR 3724 (Adelman 1997)
J/A+AS/128/245 : AR Aur, 3 Hya, 49 Cnc & BX Boo (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 table2b table3 table3b
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
16- 21 F6.3 mag u(v-c) variable-comparison (v-c) u magnitude
24- 29 F6.3 mag u(ch-c) check-comparison (ch-c) u magnitude
32- 37 F6.3 mag v(v-c) variable-comparison (v-c) v magnitude
40- 45 F6.3 mag v(ch-c) check-comparison (ch-c) v magnitude
48- 53 F6.3 mag b(v-c) variable-comparison (v-c) b magnitude
56- 61 F6.3 mag b(ch-c) check-comparison (ch-c) b magnitude
64- 69 F6.3 mag y(v-c) variable-comparison (v-c) y magnitude
72- 77 F6.3 mag y(ch-c) 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- 9 A9 --- Star Star name
11- 20 A10 --- Per Period considered (1)
21- 26 F6.3 mag u(v-c) variable-comparison (v-c) u magnitude
28- 32 F5.3 mag e_u(v-c) ? rms uncertainty on (v-c) u magnitude
34- 38 F5.3 mag u(ch-c) check-comparison (ch-c) u magnitude
40- 44 F5.3 mag e_u(ch-c) ? rms uncertainty on (ch-c) u magnitude
46- 51 F6.3 mag v(v-c) variable-comparison (v-c) v magnitude
53- 57 F5.3 mag e_v(v-c) ? rms uncertainty on (v-c) v magnitude
59- 63 F5.3 mag v(ch-c) check-comparison (ch-c) v magnitude
65- 69 F5.3 mag e_v(ch-c) ? rms uncertainty on (ch-c) v magnitude
71- 76 F6.3 mag b(v-c) variable-comparison (v-c) b magnitude
78- 82 F5.3 mag e_b(v-c) ? rms uncertainty on (v-c) b magnitude
84- 88 F5.3 mag b(ch-c) check-comparison (ch-c) b magnitude
90- 94 F5.3 mag e_b(ch-c) ? rms uncertainty on (ch-c) b magnitude
96-101 F6.3 mag y(v-c) variable-comparison (v-c) y magnitude
103-107 F5.3 mag e_y(v-c) ? rms uncertainty on (v-c) y magnitude
109-113 F5.3 mag y(ch-c) check-comparison (ch-c) y magnitude
115-119 F5.3 mag e_y(ch-c) ? rms uncertainty on (ch-c) y magnitude
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Note (1): For Theta Vir : year2: from 2448732.7901 to 2448807.6543
year3: from 2449008.9258 to 2449146.7282
year4: from 2449335.0287 to 2449476.8279
year5: from 2449736.0539 to 2449855.7760
For 109 Vir : year2: from 2448679.9591 to 2448765.7706
year3: from 2449009.9714 to 2449150.7427
year4: from 2449412.8808 to 2449502.7557
year5: from 2449746.9679 to 2449867.8048
For night averaged data:
Per = HJD of the night of observation.
Nyear4 : year 4 average 5 or more observations/night
Nyear5 : average 5 or more observations/night
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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] 03-Feb-1997