J/A+A/466/481 Near-infrared survey around PKS 1343-601 (Schroeder+, 2007) ================================================================================ The highly obscured region around PKS 1343-601. I. Galactic interstellar extinctions using DENIS galaxy colours. Schroeder A.C., Mamon G.A., Kraan-Korteweg R.C., Woudt P.A. =2007A&A...466..481S ================================================================================ ADC_Keywords: Galaxies, radio ; Photometry, infrared ; Surveys Keywords: galaxies: clusters: general - galaxies: fundamental parameters - galaxies: photometry - dust, extinction Abstract: The highly obscured radio-bright galaxy PKS 1343-601 at Galactic coordinates of (l,b)=(309.7,+1.8) has been suspected to mark the centre of a hitherto unknown cluster in the wider Great Attractor region. As such it presents an ideal region for a search of galaxies in the near-infrared (NIR) and an in-depth study of their colours as a function of extinction. A visual search of a ~30 square-degree area centred on this radio galaxy on images of the NIR DENIS survey (IJK) revealed 83 galaxies (including two AGNs) and 39 possible candidates. Of these, 49 are also listed in the 2MASS Extended Source Catalog 2MASX. Taking the IRAS/DIRBE extinction values (Schlegel et al., 1998ApJ...500..525S) at face value, the absorption in the optical (AB) ranges from ~2mag to over 100mag across the Galactic Plane. Comparing the detections with other systematic surveys, we conclude that this search is highly complete up to the detection limits of the DENIS survey and certainly surpasses any automatic galaxy finding algorithm applied to crowded areas. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 76 43 DENIS strips in the searched area table2.dat 145 126 Galaxies in the search area table3.dat 108 27 Galactic objects detected in the search area table4.dat 117 126 Cross-identifications with other catalogues -------------------------------------------------------------------------------- See also: J/MNRAS/354/980 : Near-infrared survey around PKS 1343-601 (Nagayama+, 2004) B/denis : The DENIS database (DENIS Consortium, 2005) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- Slot Slot number (according to their designation in the sky) 6- 10 I5 --- Strip Strip number (obs. of a given slot with a unique number according to observing date) (1) 12- 21 A10 "DD/MM/YYYY" Date Date of observation 23- 24 I2 h RAh Strip central Right Ascension (J2000) (2) 26- 27 I2 min RAm Strip central Right Ascension (J2000) (2) 29- 32 F4.1 s RAs Strip central Right Ascension (J2000) (2) 34- 40 I7 --- Imagef Image numbers range for the searched area 41 A1 --- --- [-] 42- 48 I7 --- Imagel Image numbers range for the searched area 50- 52 A3 --- Band [IJK -] Observed passbands 54- 57 F4.2 --- PSFI ?=- Point-spread function on I image (3) 59- 62 F4.2 --- PSFJ ?=- Point-spread function on J image (3) 64- 67 F4.2 --- PSFK ?=- Point-spread function on K image (3) 69 I1 --- Qual ?=- Seeing quality as estimated from the photometry of stars (4) 70 A1 --- n_Qual [)] Note on Qual (5) 72 I1 --- Weath ?=- Weather conditions (6) 74 I1 --- q_Strip ?=- astrometric quality of the strips (7) 76 I1 --- Prior ?=- Order of quality of strips with more than one observation (8) -------------------------------------------------------------------------------- Note (1): Strip numbers smaller than 3000 were part of the pre-survey (these have no I-band counterparts, and the exposure time was slightly larger); they were used for verification only since they are not astrometrically and photometrically calibrated. Note (2): Recall that each image has a width of about 12'. Note (3): Half-flux radius as calculated by SExtractor multiplied by 2 (an equivalent to the point-spread function, PSF). The half-flux radii were determined from all stars in the magnitude ranges 11.0m, -- Woudt et al., 1998A&A...338....8W; 1999, Cat. and 2001, Cat. . -------------------------------------------------------------------------------- Global notes: Note (G1): Visibility is 0=positive identification, 1=non-detection -------------------------------------------------------------------------------- History: * 14-May-2007: From electronic version of the journal * 26-Jul-2007: table4, IRAS 13342-5830 corrected into IRAS 13342-5838 ================================================================================ (End) Patricia Vannier [CDS] 14-May-2007