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I/176               AGK3U       (Bucciarelli+ 1992)

The AGK3U: an updated version of the AGK3 Bucciarelli B., Daou D., Lattanzi M.G., Taff L.G. <Astron. J. 103, 1689 (1992)> =1992AJ....103.1689B
ADC_Keywords: Positional data ; Proper motions Description: The AGK3U is a updated version of the AGK3 catalog in which new positions from the Palomar "Quick V" survey have been added to improve the AGK3 proper motions. It provides FK4/B1950.0 positions and proper motions for 170,464 stars north of -2.5 degrees declination, at an average epoch of 1950.62. The proper motions have a two dimensional formal mean error of 0.82 arcsec/century. In addition to the positions and proper motions, the catalog contains the AGK3 number, the mean errors of the positions and proper motion in each coordinate, the photographic magnitude, the spectral type, and the Palomar plate position, epoch, and mean error. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 186 170464 *The AGK3U Catalogue
Note on catalog.dat: there is no star between RA: 23 51 17.875 and 24h According to Larry G. Taff in a message to Sergei Puliaev : "We discovered, after the fact, that there was a problem with the coordinate transformations near the pole just prior to the equinox".
See also: I/69 : AGK3 Catalog I/146 : Catalog of Positions and Proper Motions (PPM-North), with improved data for Northern stars I/220 : The Guide Star Catalog (GSC), V1.1 Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
2- 8 A7 --- AGK3 AGK3 Number (1) 11- 12 I2 h RAh Right Ascension B1950 (hours) 14- 15 I2 min RAm Right Ascension B1950 (minutes) 17- 22 F6.3 s RAs Right Ascension B1950 (seconds) 24 A1 --- DE- Declination B1950 (sign) 25- 26 I2 deg DEd Declination B1950 (degrees) 28- 29 I2 arcmin DEm Declination B1950 (minutes) 31- 35 F5.2 arcsec DEs Declination B1950 (seconds) 36- 44 F9.5 arcsec e_RAs Mean error of right ascension*cos(delta). 45- 53 F9.5 arcsec e_DEs Mean error of the declination. 54- 63 F10.2 10mas/yr pmRA Proper motion in RA (* cos(delta)) (2) 64- 73 F10.2 10mas/yr pmDE Proper motion in declination (2) 74- 80 F7.3 10mas/yr e_pmRA Mean error of pmRA (2) 81- 87 F7.3 10mas/yr e_pmDE Mean error of pmDE (2) 88- 95 F8.2 yr EpRA Mean epoch for the right ascension (3) 96-103 F8.2 yr EpDE Mean epoch for the declination (3) 105 I1 --- Model [0/8] Model flag (4) 106 A1 --- --- [.] Always a dot. 107-117 F11.5 --- s0RA sigma zero of least square solution in RA. 118-128 F11.5 --- s0DE sigma zero of least square solution in Dec. 129-134 F6.2 mag mpg Photographic magnitude from PPM I/146 136-137 A2 --- Sp Spectral type from the PPM I/146 139-143 A5 --- Type [sm ] Type of adopted solution (5) 146-147 I2 h RAGSCh Right Ascension B1950 in GSC (hours) 149-150 I2 min RAGSCm Right Ascension B1950 in GSC (minutes) 152-157 F6.3 s RAGSCs Right Ascension B1950 in GSC (seconds) 159 A1 - DEGSC- Declination B1950 in GSC (sign) 160-161 I2 deg DEGSCd Declination B1950 in GSC (degrees) 163-164 I2 arcmin DEGSCm Declination B1950 in GSC (minutes) 166-170 F5.2 arcsec DEGSCs Declination B1950 in GSC (seconds) 171-178 F8.2 yr EpGSC Epoch of GSC observation (3) 179-186 F8.4 arcsec ErrGSC Mean error per coordinate in GSC
Note (1): the AGK3 number (identical to AGK2) is made of byte #2: Zone sign ("+" or "-") bytes #3-4: the Zone (degree of declination) bytes #5-8: number within zone (zero filled) Note (2): the proper motions are expressed in arcsec per tropical century. Note (3): in tropical years. Note (4): the model flag is 0 when a linear model was used for the determination of proper motion; the model flag is 1 to 8 when the linear model failed the chi-square testing. Note (5): the symbols used for the model are: s: subplate m: mask

(End) Francois Ochsenbein [CDS] 05-Nov-1996
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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