J/other/JAD/16.2 New times of maximum of CY Aqr (Tuvikene+, 2010)
New times of maximum of CY Aquarii.
Tuvikene T., Sterken C., Brogt E., Cont D., Henden A., Papadaki C.,
Volkov I., Wiedemair C.
<J. Astron. Data, 16, 2 (2010)>
=2010JAD....16....2T 2010JAD....16....2T
ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Photometry, CCD
Keywords: technique: photometric - stars: CY Aqr
Abstract:
We present a collection of 102 new times of maximum of the SX
Phoenicis star CY Aquarii. These times, together with 20 times of
maximum taken from the literature, lead to a new local linear
ephemeris for 2003-2009 with a formally slightly shorter period than
the one for 1996-2002. It will require at least another half decade of
additional monitoring before any significant update to any model can
be considered. Such monitoring should preferably occur at regular
intervals, be done in a consistent photometric band, and at high time
resolution.
A set of 114 new times of maximum obtained since 2002 leads to a new
local linear ephemeris for 2003-2009:
Tmax=2426159.512(±0.001)+0.061038349E(±0.000000002).
Objects:
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RA (2000) DE Designation(s)
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22 37 47.9 +01 32 04 CY Aqr = V* CY Aqr
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 11 Journal of photometric observations
usno.dat 22 290 USNO UVIc photometry
tass.dat 25 41 TASS VIc photometry
photdiff.dat 33 26134 All differential photometry
table3.dat 32 122 Times of maximum light of CY Aqr
phot/* . 9 Individual files for differential photometry
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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- 8 F8.2 d JD1 Start observation date (JD-2400000)
9 A1 --- --- [-]
10- 17 F8.2 d JD2 End observation date (JD-2400000)
19- 22 A4 --- Site Observation site (G1)
24 I1 --- N Number of nights with at least one Tmax
26- 29 A4 --- Band Photometric band(s) of observation
30- 34 I5 --- Data Number of measurements
36- 41 A6 --- Observ Observer(s) code (2)
43- 44 A2 --- Red Initials of the author who carried out the
data reduction (2)
46- 62 A17 --- FileName Name of the file with photometry
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Note (2): Observer code as follows:
EB = E. Brogt
DC = D. Cont
AH = A. Henden
CP = C. Papadaki
CS = C. Sterken
TT = T. Tuvikene
IV = I. Volkov
CW = C. Wiedemair
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Byte-by-byte Description of file: tass.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian date
15- 19 F5.3 mag dVmag Differential Johnson V magnitude
21- 25 F5.3 mag dIcmag Differential Cousins I magnitude
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Byte-by-byte Description of file: usno.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian date
15- 20 F6.3 mag mag Magnitude
22 A1 --- Band [UVI] Photometric band of observation
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Byte-by-byte Description of file: photdiff.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Site Observation site (G1)
5- 8 A4 --- n_Site Note on Site (2)
10- 23 F14.6 d HJD Heliocentric Julian date
25- 31 F7.4 mag Dmag Differential magnitude
33 A1 --- Band [BV] Photometric band of observation
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Note (2): For OCA observtions, b for B band, fast for filterless.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d Tmax Time of maximum light (HJD-2400000)
12 I1 --- W [1,5]? Weight
14- 19 I6 --- E Cycle number
21- 30 A10 --- Ref Source of the time of maximum (1)
32 A1 --- Band [UBVRI]? Photometric passband (2)
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Note (1): Source refers to this paper and to references in the literature as:
DKB2009 = Derekas et al. (2009MNRAS.394..995D 2009MNRAS.394..995D)
FSB2004 = Fu et al. (2004, ASP Conf. Ser. 318, 346)
HPW2005 = Hubscher et al. (2005IBVS.5657....1H 2005IBVS.5657....1H)
BBC2006 = Biro et al. (2006IBVS.5684....1B 2006IBVS.5684....1B)
LFZ2007 = Li et al. (2007, J. Beijing Normal University, 43, 621)
P2007 = Paschke (2007OEJV...73....1P 2007OEJV...73....1P)
P2009 = Paschke (2009OEJV..116....1P 2009OEJV..116....1P)
Note (2): A blank value means filterless photometry
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Byte-by-byte Description of file: phot/*
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian date
16- 22 F7.4 mag Dmag Differential magnitude
24 A1 --- Band [BV] Photometric band of observation
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Global notes:
Note (G1): Observatory sites and observations as follows:
USNO = CCD frames were acquired with the USNO-Flagstaff 1.0-m telescope on
October 21 and 29, 1998 (V and Ic band, respectively) and on
December 15, 1998 and January 17, 1999 (U band).
TASS = This is a simultaneous V/Ic set from September 19, 2000, using the
USNO TASS Sky Survey camera.
SKO = Observations with the 1.3-m Ritchey-Chretien telescope were made at
Skinakas Observatory (SKO, Greece) on August 31 and September 1, 2004.
OHL = Observatorium Hoher List. On October 7-13, 2004, CCD frames were
acquired at Observatorium Hoher List (OHL) in Germany, using the
1-m Cassegrain-Nasmyth telescope.
MLO = Mount Laguna Observatory. In September 2004 the Smith 24-inch
telescope at Mount Laguna Observatory (MLO, San Diego State
University, CA) was used.
SAI = Crimean Laboratory of the Sternberg Astronomical Institute.
In October-November 2004 observations were made at the Sternberg
Astronomical Institute Crimean Station (SAI). The following setups
were used: on October 25 the Zeiss 60-cm Cassegrain telescope
equipped with an Apogee-7 camera; on October 27-30 and November 1,
the Maksutov 50-cm telescope with a Pictor 416 CCD camera.
OCA = Observatorio Cerro Armazones. The star was intensely observed with
the 84-cm telescope at Observatorio Cerro Armazones (OCA), Chile
during 6 nights in July 2005.
MDM = MDM Observatory. On October 30 and 31, 2007 the 2.4-m Hiltner
telescope at the MDM Observatory, Arizona, USA.
SAAO = South African Astronomical Observatory. In November 2005 the 1.0-m
telescope at the South African Astronomical Observatory (SAAO),
Sutherland, South Africa.
RGB = Realgymnasium Bruneck. From September 19 to December 28, 2008, 14
partial nights of observations were obtained by a team of students
from the Realgymnasium Bruneck (RGB, Suedtirol, Italy) under the
supervision of CW. A Meade LX200 telescope with an SBIG ST8-XME CCD
camera was used on the college roof.
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Acknowledgements:
Christiaan Sterken, csterken(at)vub.ac.be
(End) Patricia Vannier [CDS] 13-Dec-2011