J/ApJS/190/166 Optical catalog of AKARI NEP-wide survey (Jeon+, 2010)
Optical images and source catalog of AKARI North Ecliptic Pole wide survey field. Jeon Y., Im M., Ibrahimov M., Lee H.M., Lee I., Lee M.G. <Astrophys. J. Suppl. Ser., 190, 166-180 (2010)> =2010ApJS..190..166J
ADC_Keywords: Photometry, UBVRI ; Surveys ; Galaxies, photometry Keywords: catalogs - galaxies: evolution - galaxies: photometry - surveys Abstract: We present the source catalog and the properties of the B-, R-, and I-band images obtained to support the AKARI North Ecliptic Pole Wide (NEP-Wide) survey. The NEP-Wide is an AKARI infrared imaging survey of the north ecliptic pole covering a 5.8deg2 area over 2.5-6um wavelengths. The optical imaging data were obtained at the Maidanak Observatory in Uzbekistan using the Seoul National University 4kx4k Camera on the 1.5m telescope. These images cover 4.9deg2 where no deep optical imaging data are available. Our B-, R-, and I-band data reach the depths of ∼23.4, ∼23.1, and ∼22.3mag(AB) at 5σ, respectively. The source catalog contains 96460 objects in the R band, and the astrometric accuracy is about 0.15" at 1σ in each RA and DEC direction. These photometric data will be useful for many studies including identification of optical counterparts of the infrared sources detected by AKARI, analysis of their spectral energy distributions from optical through infrared, and the selection of interesting objects to understand the obscured galaxy evolution. Description: The AKARI NEP-Wide field is centered at 18:00:00+66:36:00 covering a circular area of 5.8deg2. The images were obtained in Bessell B, R, and I filters from 2007 June 12 to August 5 at the Maidanak Observatory in Uzbekistan, using the Seoul National University 4kx4k Camera (SNUCAM) on the 1.5m Richey-Chretien, AZT-22 telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 140 117815 *B, R, and I band merged catalog
Note on table4.dat : Throughout this paper, we use a cosmology with ΩM=0.3, ΩΛ=0.7, and H0=70km/s/Mpc. We also use the AB magnitude system.
See also: II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010) II/298 : AKARI/FIS All-Sky Survey Point Source Cat. (ISAS/JAXA, 2010) J/PASJ/59/S529 : NEP deep survey at 11um (Lee+, 2007) J/ApJS/172/583 : NEP source catalog (Hwang+, 2007) J/A+A/517/A54 : AKARI NEP WSRT 20 cm radio survey (White+, 2010) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 9 A9 --- ID Source identification number 11- 12 I2 h RAh Hour of Right Ascension (J2000) 14- 15 I2 min RAm Minute of Right Ascension (J2000) 17- 20 F4.1 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000) 34- 38 F5.2 mag Bmag ?=99.00 Total uncorrected (AB) B band magnitude 40- 44 F5.2 mag e_Bmag ?=99.00 Error in Bmag 46- 50 F5.2 mag Bamag ?=99.00 Aperture uncorrected B band magnitude (1) 52- 56 F5.2 mag e_Bamag ?=99.00 Error in Bmagap 58- 62 F5.2 mag Rmag ?=99.00 Total uncorrected (AB) R band magnitude 64- 68 F5.2 mag e_Rmag ?=99.00 Error in Rmag 70- 74 F5.2 mag Ramag ?=99.00 Aperture uncorrected R band magnitude (1) 76- 80 F5.2 mag e_Ramag ?=99.00 Error in Rmagap 82- 86 F5.2 mag Imag ?=99.00 Total uncorrected (AB) I band magnitude 88- 92 F5.2 mag e_Imag ?=99.00 Error in Imag 94- 98 F5.2 mag Iamag ?=99.00 Aperture uncorrected I band magnitude (1) 100-104 F5.2 mag e_Iamag ?=99.00 Error in Imagap 106-109 F4.2 --- s/g Stellarity index; 1=point and 0=extended 111-114 F4.2 mag AB B band galactic extinction value 116-119 F4.2 mag AR R band galactic extinction value 121-124 F4.2 mag AI I band galactic extinction value 126-140 A15 --- Flags Flag parameters (2)
Note (1): within a circular aperture with a diameter of 3 times FWHM. Note (2): Parameters as follows: nearbrightobj = spurious detection near bright star(s); near_edge = spurious detection near edge of a single image; galaxy = non-stellar source classified in Section 4.2.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-Sep-2010
|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|