J/AJ/149/150 Photometry of multiples at NAOR and ASV in 2012 (Cvetkovic+, 2015)
CCD measurements of double and multiple stars at NAO Rozhen and ASV in 2012.
Four linear solutions.
Cvetkovic Z., Pavlovic R., Boeva S.
<Astron. J., 149, 150 (2015)>
=2015AJ....149..150C 2015AJ....149..150C
ADC_Keywords: Stars, double and multiple ; Photometry, UBV ; Photometry, CCD
Keywords: binaries: visual - techniques: image processing -
stars: individual: (J 703, HJ 2699BC, LDS 1800, POP 34AB)
Abstract:
Using the 2m telescope of the Bulgarian National Astronomical
Observatory at Rozhen, observations of 246 double or multiple stars
were carried out during six nights in 2012. This is the seventh series
of measurements of CCD frames of double and multiple stars obtained at
Rozhen. Also in 2012, using the 0.6m telescope of the Serbian
Astronomical Station on the mountain of Vidojevica, observations of
117 double or multiple stars were carried out during five nights. This
is the second series of measurements of CCD frames of double and
multiple stars obtained at this station. In this paper we present the
results for the position angle and angular separation for 453 pairs
and residuals for 105 pairs with published orbital elements or linear
solutions. These observations have angular separations in the range
from 1.50'' to 178.12'', with a median angular separation of 8.13''.
We also present the recalculated linear solution for one pair and
three linear solutions that have been calculated for the first time.
Description:
The previous six series of CCD observations of double and multiple
stars performed by the Belgrade team at the Bulgarian National
Astronomical Observatory at Rozhen (NAOR) with a CCD camera attached
to the 2m telescope took place in 2004, 2005, 2006, 2009, 2010, and
2011, respectively. The results have been published in Pavlovic et al.
(2005SerAJ.171...49P 2005SerAJ.171...49P; 2013, cat. J/AJ/146/52) and Cvetkovic et al.
(2006SerAJ.172...53C 2006SerAJ.172...53C; 2007SerAJ.174...83C 2007SerAJ.174...83C; 2010SerAJ.180..103C 2010SerAJ.180..103C; 2011,
cat. J/AJ/142/73). The seventh series comprising observations of 246
double or multiple stars took place during six nights: three nights on
2012 April 24-27 and three nights on 2012 November 8-11. In general,
the observing program contained systems from the Washington Double
Star Catalog (cat. B/wds) for which either the number of measurements
was small (less than 15) or the measurements covered a short orbital
arc. The telescope is of the Ritchey-Chretien-Coude type with a focal
length of 16m as given by the manufacturer. The result of determining
the focal length of this telescope more precisely is given in the
paper Cvetkovic et al. 2013 (PASRB 12 135). The frames were obtained
by using the CCD camera VersArray 1300B. For each double or multiple
star 10 frames were obtained: 5 in the Johnson B filter and 5 in the
Johnson V filter.
During the summer of 2011, the first CCD observations of double and
multiple stars from the Astronomical Station on the mountain of
Vidojevica (ASV) took place. The results have been published in
Pavlovic et al. 2013 (cat. J/AJ/146/52). This station belongs to the
Astronomical Observatory of Belgrade. More details can be found at the
observatory's website (http://belissima.aob.rs/). The 60cm telescope
has an equatorial mounting and a Cassegrain optical system. The
telescope focal length is 600cm as given by the manufacturer. The
result of determining the focal length of this telescope more
precisely is given in the paper Cvetkovic et al.
(2012SerAJ.184...97C 2012SerAJ.184...97C). We carried out CCD observations of 117 visual
double or multiple stars at ASV during five nights: one night on 2012
April 22-23 and four nights on 2012 June 21-25. This is the second
series of observations at ASV. For these nights we used an Apogee Alta
U42 CCD camera. For each star pair 10 frames were obtained: 5 in the
Cousins/Bessel B filter and 5 in the Cousins/Bessel V filter.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 91 394 CCD measurements of double and multiple stars
table3.dat 108 143 CCD measurements of a system with orbits or
rectilinear solutions
table7.dat 72 54 Measurements and residuals (in ρ and
θ) from new linear solutions for all four
pairs as well as residuals from the orbital
solution for pair J 703 and residuals from the
old linear solution for pair LDS 1800
refs.dat 227 40 References
notes.dat 3327 4 Notes
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
I/274 : Catalog of Components of Double & Multiple stars (Dommanget+ 2002)
J/AJ/146/52 : CCD measurements of multiples at NAOR and ASV (Pavlovic+, 2013)
J/AJ/142/73 : NAO Rozhen CCD measurements of multiple stars (Cvetkovic+, 2011)
http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/WDS : WDS catalog
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS Designation in the Washington Double Star
catalog (B/wds) (HHMMS+DDMM, J2000)
12- 19 A8 --- Disc Discoverer designation (G1)
21- 25 A5 --- m_Disc Designation for pair components
27- 35 F9.4 yr Epoch [2012.3/2012.9] Epoch of observation
(fractional Besselian year)
37- 42 F6.2 arcsec Sep [1.5/171] Angular separation ρ (G2)
44- 47 F4.2 arcsec e_Sep 1σ uncertainty in Sep
49- 54 F6.2 deg PA [0/360] Position angle θ (G2)
56- 59 F4.2 deg e_PA 1σ uncertainty in PA
61- 64 F4.2 mag DBmag ? Difference in B-band magnitudes (G3)
66- 69 F4.2 mag e_DBmag ? 1σ uncertainty in DBmag
71- 74 F4.2 mag DVmag ? Difference in V-band magnitudes (G3)
76- 79 F4.2 mag e_DVmag ? 1σ uncertainty in DVmag
81- 91 A11 --- Camera Camera used (Apogee Alta or VersArray) (G4)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS Designation in the Washington Double Star
catalog (B/wds) (HHMMS+DDMM, J2000)
12- 19 A8 --- Disc Discoverer designation (G1)
21- 25 A5 --- m_Disc Component
27- 35 F9.4 yr Epoch [2012.3/2012.9]? Epoch of observation
(fractional Besselian year)
37- 42 F6.2 arcsec Sep [1.5/179]? Angular separation ρ (G2)
44- 47 F4.2 arcsec e_Sep [0.01/0.44]? Uncertainty in Sep
49- 54 F6.2 deg PA [0/360]? Position angle θ (G2)
56- 59 F4.2 deg e_PA [0.03/4.7]? Uncertainty in PA
61- 64 F4.2 mag DBmag ? Difference in B band magnitudes (G3)
66- 69 F4.2 mag e_DBmag ? Uncertainty in DBmag
71- 74 F4.2 mag DVmag ? Difference in V band magnitudes (G3)
76- 79 F4.2 mag e_DVmag ? Uncertainty in DVmag
81- 85 F5.2 arcsec (O-C)S The separation (O-C) value (O-C)ρ
87- 90 F4.1 deg (O-C)A The position angle (O-C) value (O-C)θ (1)
92- 96 A5 --- Ref Reference of orbital solution; in refs.dat file
98-108 A11 --- Camera Camera used (Apogee Alta or VersArray) (G4)
--------------------------------------------------------------------------------
Note (1): In the calculation of residuals the position angle has been precessed.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Disc Discoverer designation (G5)
10- 14 A5 --- m_Disc Component
16- 24 F9.4 yr Epoch [1905.12/2013.4] Epoch of observation
(fractional Besselian year)
26- 31 F6.3 arcsec Sep [1.7/16] Angular separation ρ
33 A1 --- f_PA [*] change of the quadrant of the position angle
34- 39 F6.2 deg PA [0/360] Position angle θ
41- 45 F5.2 arcsec (O-C)1 (O-C)ρ for the new linear solution
47- 50 F4.1 deg (O-C)2 (O-C)θ for the new linear solution
52- 56 F5.2 arcsec (O-C)3 ? (O-C)ρ from the orbital solution
58- 61 F4.1 deg (O-C)4 ? (O-C)θ from the orbital solution
63- 67 F5.2 arcsec (O-C)5 ? (O-C)ρ from the old linear solution
69- 72 F4.1 deg (O-C)6 ? (O-C)θ from the old linear solution
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Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ref Reference identifier
7- 25 A19 --- BibCode Bibliographic code
27- 49 A23 --- Aut Author's name
51-227 A177 --- Com Comments
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS Designation in the Washington Double Star
catalog (B/wds) (HHMMS+DDMM, J2000)
12- 18 A7 --- Disc Discoverer designation (G5)
20- 21 A2 --- m_Disc Component
23-3327 A3305 --- Note Note about the star
--------------------------------------------------------------------------------
Global notes:
Note (G1): Double-star name after the discoverer.
Note (G2): The separation and position angle are the average of data taken in
both the B and V filters. Note that the position angle has not been
corrected for precession and it is thus based on the equinox for the epoch
of observation.
Note (G3): Between components of pairs, and determined using IRAF.
Note (G4): The two camera codes are defined as below:
VersArray = CCD camera VersArray 1300B;
Apogee Alta = Apogee Alta U42 CCD camera.
Note (G5): HJ 2699BC, J 703, LDS 1800, or POP 34AB.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 21-May-2015