VI/30A Plates of the ESO / SERC Sky Survey (Holmberg+ 1974-)
Plate Centers of the European Southern Observatory Sky Survey Holmberg E.B., Lauberts A., Schuster H.-E., West R.M. <Astron. Astrophys. Suppl. Ser. 18, 463 (1974)> =1974A&AS...18..463H
ADC_Keywords: Surveys; Plate data Description: The "ESO/SRC Atlas of the Southern Sky" is a major tool for, among other things, the optical identification of sources in non-optical wavelengths. The catalog contains the coordinates of the plate centers, as well as the actual observation dates of the plates composing the ESO(B) Survey (also called the Quick Blue Survey) over in the period 1973/79, the ESO Red survey, observed in the period 1978/90, and the SRC-J survey at the Anglo-Australian telescope in the period 1974/1987. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file esob.dat 71 606 Observed plates in Blue at ESO esor.dat 71 617 Observed plates in Red at ESO srcj.dat 71 609 Observed plates in Blue at the Anglo-Australian Obs. centers.dat 40 606 Nominal centers of Southern plates
See also: VI/25 : Plate Centers of POSS-I (Palomar Obs. 1960) VI/114 : Plate Centers of POSS-II (Read, 2004) Byte-by-byte Description of file: esob.dat, esor.dat, srcj.dat
Bytes Format Units Label Explanations
2 A1 --- Col [BR] Color 3- 7 I5 --- Plate Plate number 9 A1 --- --- [*] Additional plates (in esor.dat) 10- 15 A6 --- Srv Survey name 18- 20 I3 --- Field Nominal field number 22- 23 I2 h RAh Right Ascension Center B1950 (hours) 24- 26 I3 dmin RAdm Right Ascension B1950 (deci-minutes) 27 A1 --- DE- Declination B1950 (sign) 28- 29 I2 deg DEd [0,90] Declination B1950 (degrees) 30- 31 I2 arcmin DEm Declination B1950 (minutes) 33- 36 I4 yr Obs.Y Observation date (year) 37- 38 I2 "month" Obs.M Observation date (month) 39- 40 I2 d Obs.D Observation date (day) 41 A1 --- --- [:] 42- 46 A5 "h:m" LST Local Sideral Time of Observation 48- 53 A6 --- Emuls Photographic emulsion 55- 59 A5 --- Filter Name of filter 61- 65 F5.1 min ExpTime Exposure time 67- 71 A5 --- Grade based on the smallest image size in microns
Byte-by-byte Description of file: centers.dat
Bytes Format Units Label Explanations
1- 3 I3 --- FldNum ? ESO/SRC Atlas of the Southern Sky field number. 7- 8 I2 h RAh *? Field center right ascension (B1950) 11- 12 I2 min RAm *? Field center right ascension (B1950) 16 A1 --- DE- Field center declination (sign) (B1950) 17- 18 I2 deg DEd *? Field center declination (deg) (B1950) 22- 29 F8.5 rad RArad *? Right ascension in radians (B1950) 33- 40 F8.5 rad DErad *? Declination in radians (B1950)
Note on RAh, RAm, DEd: Nominal field center, equatorial coordinates (1950.0), in sexagesimal units. Note on RArad, DErad: Nominal field center, equatorial coordinates (1950.0) in radians.
REMARKS AND MODIFICATIONS: The file of plate centers (centers.dat) gives the nominal field centers of the ESO/SRC Atlas of the Southern Sky as listed in Holmberg et al. (1974). This file was prepared by the Astronomical Data Center (ADC), NASA Goddard Space Flight Center. The nominal centers were adopted, and one plate scale was adopted for all the fields. This scale is 66.98 arc seconds/mm in the east-west direction and 67.26 arc seconds/mm in the north-south direction. This scale was derived by measuring the distances between SAO stars on selected films and was tested by generating overlays with a Calcomp plotter. The ability to efficiently generate such overlays for source identification was the primary reason for producing this dataset. Acknowledgments: Thanks to Heinz Andernach (Univ. Guanajuato) and Mike Reed (Royal Obs. Edinburgh) for the files containing the actual observation dates (added in July 2005) History: * 16-Aug-1995: catalog made of the file "centers.dat" by C.-H. Joseph Lyu [Hughes STX/NASA] * 21-Jul-2005: Files containing observation dates and qualities were supplied by Mike Reed (Royal Obs. Edinburgh). Added the file "srcj.dat" (from Mike Reed) * 03-Nov-2007: one spurious record having RA and Dec set to zero was removed from the esor.dat file. REFERENCES: Holmberg, E. B., Lamberts, A., Schuster, H. E., and West, R. M. (1974). Astron. Astrophys Suppl. pp. 463-489. Nagy, T. A. (1980). Astronomical Data Center Bulletin pp. 28-31.
(End) Francois Ochsenbein [CDS] 21-Jul-2005
|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|