1997A&AS..125...11S


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.19CEST05:45:31

1997A&AS..125...11S - Astron. Astrophys., Suppl. Ser., 125, 11-63 (1997/October-1)

Starspot photometry with robotic telescopes. Continuous UBV and V(RI)C photometry of 23 stars in 1991-1996.

STRASSMEIER K.G., BARTUS J., CUTISPOTO G. and RODONO M.

Abstract (from CDS):

We report on the progress of our ongoing photometric monitoring program of spotted late-type stars with automatic photoelectric telescopes (APTs) on Mt. Hopkins in Arizona and on Mt. Etna in Sicily. We present 9250 differential UBV and/or V(RI)C observations for altogether 23 chromospherically active stars, singles and binaries, pre main sequence and post main sequence, taken between 1991 and 1996. The variability mechanism of our target stars is mostly rotational modulation by an asymmetrically spotted stellar surface. Therefore, precise rotational periods and their seasonal variations are determined using baselines between 3 years for HD 129333 to 34 years for V410 Tauri. We report the largest V light-curve amplitude of any spotted star observed to date: 0.65mag for V410 Tau in 1994-95. Long-term variations of the overall light levels of our target stars are sometimes of similar amplitude as the rotational modulation itself and are most likely caused by an analog of the solar 11-year spot cycle but mostly without a well-defined periodicity. For some of our target stars (HD 12545, HD 17433, EI Eri, V410 Tau, LQ Hya, and HD 106225) we estimate a probable cycle period. A complete light curve of the semi-regular S-type giant HR Pegasii is presented. All data are available via the WorldWideWeb.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: late-type - stars: rotation - binaries: spectroscopic - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+AS/125/11): cata1 cata2 ei_eri.ph hr8714.t7 phoenix vienna>

Simbad objects: 23

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Number of rows : 23

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* XX Tri RS* 02 03 47.1138016857 +35 35 28.669244792   9.52 8.42     K0III 121 0
2 V* VY Ari RS* 02 48 43.7283572894 +31 06 54.592580835   7.72   6.4   G9 211 0
3 V* EI Eri RS* 04 09 40.8929265498 -07 53 34.177328732   7.71 7.04     G3V 272 0
4 V* V410 Tau Or* 04 18 31.1083261392 +28 27 16.155411536   12.13 10.75 8.45 9.408 K3Ve 437 0
5 HD 283750 BY* 04 36 48.2413370074 +27 07 55.898311812   9.354   7.4   K2.5Ve 258 2
6 V* SU Aur Or* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 546 0
7 V* V1198 Ori RS* 04 58 16.9768687912 +00 27 13.975499258   7.90   6.8   G5IVe 72 1
8 V* V1192 Ori RS* 05 00 08.2195451291 +03 17 12.021405034   8.75 7.503   6.223 K1/2III 81 0
9 V* TZ Col RS* 05 52 15.9885946977 -28 39 24.914638055   9.67 9.082   8.366 G3V 47 1
10 V* IL Hya RS* 09 24 49.0137313673 -23 49 34.713618005   8.38 7.37     K2IV/Vp 163 0
11 V* LQ Hya BY* 09 32 25.5684079124 -11 11 04.687410738 9.316 8.761 7.891 7.288 6.815 K1Vp 412 0
12 HD 82443 BY* 09 32 43.7594363452 +26 59 18.708212270   7.78   6.6   G9V(k) 225 1
13 V* HU Vir RS* 12 13 20.6903303051 -09 04 46.844857323   9.69 8.71   7.639 K1V 139 0
14 * 31 Com Ro* 12 51 41.9190038520 +27 32 26.568320838 5.81 5.61 4.94 4.39 4.04 G0IIIp 413 1
15 PN LoTr 5 PN 12 55 33.7461986779 +25 53 30.561300806   9.72 8.88     G5III-IV 199 0
16 V* IS Vir RS* 13 06 26.0086694996 -04 50 45.301471255   9.50 8.432   7.175 K0III 49 1
17 V* IN Vir RS* 13 24 24.1562948425 -02 18 54.937752922   10.33 9.131   7.900 K2III 56 0
18 V* FK Com Ro* 13 30 46.7993742986 +24 13 57.786184235   9.04 8.245   7.204 G4III 356 1
19 V* EK Dra BY* 14 39 00.2109485496 +64 17 29.977371998   8.243 7.604     G1.5V 390 0
20 V* UZ Lib SB* 15 32 23.2091329303 -08 32 00.933695382   10.12 9.115   7.904 K0III 114 1
21 V* AT Cap RS* 20 29 36.8563603043 -21 07 34.734175815   10.15 8.874   7.637 G6III/IV 58 0
22 V* BM Mic RS* 21 14 31.1504369868 -30 45 26.915232858   9.05 8.285   7.337 G7III 26 0
23 V* IM Peg RS* 22 53 02.2658951462 +16 50 28.291474642   7.024 5.890     K2III 322 1

    Equat.    Gal    SGal    Ecl

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2021.05.19-05:45:32

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