J/AN/341/762 CCD observations of visual double stars (Izmailov+, 2020)
Astrometric observations of visual double stars at Pulkovo observatory with
26-inch refractor during 2014 - 2019.
Izmailov I., Rublevsky A., Apetyan A.
<Astron. Nachr. 341, 762-769 (2020)>
=2020AN....341..762I 2020AN....341..762I (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Positional data
Keywords: visual double stars - Positional data
Description:
We present 18365 astrometric observations of 290 visual binaries
obtained with the 26-inch refractor of Pulkovo Observatory during
2014-2019. The separation between components is from 1.3" to 37" with
a median value of 4.8". For a single observation, the mean separation
error is 0.013", and the mean position angle error is 0.44°/rho,
where rho is an angular distance in arcseconds. We compare the
observations of sample stars with the data from the Gaia DR2 catalog
and the results of the ground-based observations performed with other
telescopes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 18365 Positional data of separate nights
table2.dat 76 1477 Yearly average positions
table3.dat 46 39 The O-C (observed minus calculated) residuals
refs.dat 72 28 References
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS identifier (Cat. B/wds)
12- 15 A4 --- Comp Components when more than 2
17- 21 A5 --- ADS ADS number
23- 28 F6.3 yr Epoch Epoch of observation
30- 32 I3 --- N Number of CCD frames
34- 41 F8.4 deg Theta Position Angle based on the equinox for the
epoch of observation (1)
43- 49 F7.4 arcsec Rho Separation
51- 56 F6.4 deg e_Theta Standard deviation in Theta
58- 63 F6.4 arcsec e_Rho Standard deviation in Rho
65- 70 F6.4 arcsec e_Theta2 Standard deviation of one CCD image in Theta
72- 77 F6.4 arcsec e_Rho2 Standard deviation of one CCD image in Rho
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Note (1): The position angle has not been corrected for precession, and is thus
based on the equinox for the epoch of observation.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS identifier (Cat. B/wds)
12- 15 A4 --- Comp Components
17- 21 A5 --- ADS ADS number
23- 28 F6.3 yr Epoch Epoch of observation
30- 31 I2 --- N Number of CCD frames
33- 40 F8.4 deg Theta Position Angle based on the equinox for the
epoch of observation (1)
42- 48 F7.4 arcsec Rho Separation
50- 55 F6.4 deg e_Theta Standard deviation in Theta
57- 62 F6.4 arcsec e_Rho Standard deviation in Rho
64- 69 F6.4 arcsec e_Theta2 Standard deviation of one night in Theta
71- 76 F6.4 arcsec e_Rho2 Standard deviation of one night in Rho
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Note (1): The position angle has not been corrected for precession, and is thus
based on the equinox for the epoch of observation.
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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 A10 --- WDS WDS identifier (Cat. B/wds)
12- 13 A2 --- Comp Components
15- 21 F7.4 arcsec (O-C)Rho O-C separation residual
23- 29 F7.4 deg (O-C)Theta O-C position angle residual in deg
31- 37 F7.4 arcsec (O-C)ThetaAS O-C position angle residual in arcsec
39- 46 A8 --- Ref Observation reference, in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Ref Reference code
11- 29 A19 --- BibCode BibCode (1)
31- 53 A23 --- Aut Author's name
55- 72 A18 --- Com Comments
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Note (1): from http://www.astro.gsu.edu/wds/Webtextfiles/wdsnewref.txt
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Acknowledgements:
Igor Izmailov, i_izmailov(at)mail.ru
(End) Igor Izmailov [Pulkovo Obs.], Patricia Vannier [CDS] 12-Nov-2020