J/A+AS/143/265 Solar diameter observations in 1998-1999 (Puliaev+, 2000)
Solar diameter observations at Observatorio Nacional in 1998-1999.
Puliaev S., Penna J.L., Jilinski E.G., Andrei A.H.
<Astron. Astrophys. Suppl. Ser. 143, 265 (2000)>
=2000A&AS..143..265P 2000A&AS..143..265P
ADC_Keywords: Sun
Keywords: Sun: general, fundamental parameters
Abstract:
In January 1997, at the Observatsrio Nacional (ON), Rio de Janeiro,
Brazil, digital CCD observations of the solar diameter began with a
Danjon astrolabe adapted for solar observations and equipped with a
variable angle reflecting prism. The prism enables observations of the
Sun several times per day and all year round at the southern latitude
φ=-22° 54'. As of June 1999, about 9000 observations have been
made. The mean value of the apparent semi-diameter is 959.13"±0.01".
Here we report on the results obtained between July 1998 and June
1999. In 162 days 4276 observations were made. For this period the
mean apparent semi-diameter is 959.07"±0.02". No significant
difference between the apparent semi-diameters is found as observed on
the East and West sides of the meridian.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 43 162 Daily average of the raw results from solar
semi-diameter observations by the
Solar Astrolabe at Rio de Janeiro.
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See also:
J/A+AS/135/227 : Solar diameter observations in 1997-1998 (Jilinski+, 1999)
J/A+A/375/614 : Astrolabe observations of the Sun in 1990-2000 (Noel, 2001)
J/A+AS/102/11 : Astrolabe observations of the Sun in 1990-1992 (Noel 1993)
J/A+AS/106/327 : Observations of the Sun during 1993 at Santiago (Noel 1994)
J/A+AS/113/131 : Observations of the Sun during 1994 (Noel, 1995)
J/A+AS/132/195 : Astrolabe observations of the Sun in 1995-1997 (Noel 1998)
J/A+AS/110/351 : Sun observations in 1992 (Sanchez+, 1995)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Nobs Number of observations
5- 10 F6.2 arcsec Diam Daily average semi-diameter
13- 16 F4.2 arcsec e_Diam Standard error of the average semi-diameter
19- 28 A10 "YYYY/DD/MM" Date Year, month and day of the observations
31- 37 I7 d MJD Modified Julian Date, of the eastern transit
40- 43 F4.2 arcsec Err The error of a single observation, given by
the standard deviation
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Acknowledgements: Jucira Lousada Penna
(End) Patricia Bauer [CDS] 10-Jun-2002