J/A+AS/140/29 Photometric monitoring of 47 late-type stars (Strassmeier+, 1999)
Starspot photometry with robotic telescopes.
UBV(RI)c and by light curves of 47 stars in 1996/97
Strassmeier K.G., Serkowitsch E., Granzer T.
<Astron. Astrophys. Suppl. Ser. 140, 29 (1999)>
=1999A&AS..140...29S 1999A&AS..140...29S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Photometry, UBV ; Photometry, VRI ;
Photometry, uvby
Keywords: stars: activity - stars: late-type - stars: rotation -
binaries: spectroscopic - techniques: photometric
Abstract:
We present continuous multicolor photometry for 47 stars from October
1996 through June 1997. Altogether, 7073 V(RI)c, UBV, and by data
points, each the average of three individual readings, were acquired
with three automatic photoelectric telescopes (APTs) at Fairborn
Observatory in southern Arizona. Most of our targets are
chromospherically active single and binary stars of spectral type G to
K but there are also four pre-main-sequence objects and three
pulsating stars in our sample. The light variability is generally due
to rotational modulation of an asymmetrically spotted stellar surface
and therefore precise rotational periods and their seasonal variations
are determined from Fourier analysis. We also report on photometric
variations of γ CrB (A0V) with a period of 0.44534 days. All
data are available in numerical form.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 149 43 Program, comparison and check stars
wolfgang.dat 57 4206 by photometry with Wolfgang 0.75m APT
amadeus.dat 70 8189 VRI photometry with Amadeus 0.75m APT
apt1q97.dat 78 2349 UBV photometry with Phoenix-10 0.25m APT
apt2q97.dat 78 2041 UBV photometry with Phoenix-10 0.25m APT
apt4q96.dat 78 1199 UBV photometry with Phoenix-10 0.25m APT
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0) (1)
4- 5 I2 min RAm Right ascension (J2000.0) (1)
7- 10 F4.1 s RAs Right ascension (J2000.0) (1)
12 A1 --- DE- Declination sign (J2000.0) (1)
13- 14 I2 deg DEd Declination (J2000.0) (1)
16- 17 I2 arcmin DEm Declination (J2000.0) (1)
19- 20 I2 arcsec DEs Declination (J2000.0) (1)
23- 31 A9 --- Star Star name
33 A1 --- --- [=]
35- 44 A10 --- Other Other name
47- 56 A10 --- Comp Comparison star name
58- 67 A10 --- Check Check star name
69- 72 F4.1 mag Vmag V magnitude
74- 83 A10 --- SpType Spectral type
85- 87 A3 --- Binary Binary type (SB/S)
89- 97 F9.4 d Porb ? Orbital period
99-100 A2 --- x_Porb [yr ] yr if Porb is expressed in years
101 A1 --- u_Porb [?] ? if unknown
103-111 F9.5 d Pphtm ? Average photometric period
112 A1 --- n_Pphtm [ni] n: not detected
i: irregular
113-114 A2 --- u_Pphtm [: )] Uncertainty flag on Pphtm
116-117 A2 --- l_vsini [≤ ] Limit flag on vsini
118-122 F5.1 km/s vsini ? Rotational velocity
124-125 A2 --- l_Rad [≥ ] Limit flag on Rad
126-130 F5.2 solRad Rad ? Radius
131 A1 --- u_Rad Uncertainty flag on Rad
133-149 A17 --- Vtype Variable type
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Note (1): Positions from SIMBAD database
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Byte-by-byte Description of file: wolfgang.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star Variable star name
11- 13 A3 --- Obs ckc: V1 = check star
vcm: V1 = variable star
15- 28 F14.6 d HJD Heliocentric Julian Date
31- 36 F6.4 mag e_bmag V1 standard error of mean
38- 43 F6.3 mag Dbmag Differential magnitude V1 minus comparison
45- 50 F6.4 mag e_ymag V1 standard error of mean
52- 57 F6.3 mag Dymag Differential magnitude V1 minus comparison
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Byte-by-byte Description of file: amadeus.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star Variable star name
11- 13 A3 -- Obs ckc: V1 = check, V2 = comparison
vck: V1 = variable, V2 = check
vcm: V1 = variable, V2 = comparison
15- 28 F14.6 d HJD Heliocentric Julian Date
30- 35 F6.4 mag e_Vmag V1 standard error of mean
37- 42 F6.3 mag DVmag Differential magnitude V1 minus V2
44- 49 F6.4 mag e_Rmag V1 standard error of mean
51- 56 F6.3 mag DRmag Differential magnitude V1 minus V2
58- 63 F6.4 mag e_Imag ? Variable standard error of mean
65- 70 F6.3 mag DImag ? Differential magnitude V1 minus V2
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Byte-by-byte Description of file: apt1q97.dat apt2q97.dat apt4q96.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- UserID [33] User identification
5- 7 I3 --- Ngroup Group number
9- 20 F12.4 d HJD Heliocentric Julian date
22 I1 --- Obs [1-2] Observation type: 1 = Var-Comp
2 = Check-Comp
24 I1 --- Filt [1-3] Filter: 1 = U, 2 = B, 3 = V
26- 27 I2 s Int Integration time
30- 34 I5 mmag Dmag Differential magnitude
36- 37 I2 mmag e_Dmag Internal standard error
41- 43 I3 mmag Res1 Residuals of individual readings from the mean
47- 49 I3 mmag Res2 Residuals of individual readings from the mean
53- 55 I3 mmag Res3 Residuals of individual readings from the mean
57- 61 F5.3 --- Airmass Airmass
63- 68 F6.3 --- DAirmass Differential airmass
70- 78 A9 --- Star Starname
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Acknowledgements: Klaus G. Strassmeier
(End) Patricia Bauer [CDS] 15-Nov-1999