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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. <Astron. Astrophys., 466, 481-499 (2007)> =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<I<15.0m, 9.0m<J<13.0m, and 7.0m<K<10.5m that do not lie within 50 pixels of the image border. Note (4): Quality flag as follows: 1 = good seeing (photometry not affected) 2 = medium seeing (7"-aperture photometry is affected) 3 = bad seeing (all magnitudes affected) Note (5): An ) indicates that the Qual value is an estimate of the seeing where the astrometry was insufficient for a statistical comparison of the photometry in the overlap regions. Note (6): Weather conditions as follows: 1 = no clouds 2 = unknown conditions 3 = possible clouds 4 = clouds Note (7): The DENIS standard high accuracy of an rms of 0.2" is indicated with a 1, lower accuracy with 2. For strips where astrometric calibration failed we determined the coordinates from the DSS*-red images (accuracy of about 2-3"). Note (8): Order of quality of strips with more than one observation (1 indicates the best strip, higher numbers designate lower priorities).
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [DZOA] 5- 11 A7 --- DZOA DZOA designation (NNNN-NN) (1) 13- 14 I2 --- Nobs Total number of sightings of same galaxy (2) 15 A1 --- n_Nobs [+] + when additional observation from the pre-survey 17- 18 I2 h RAh Right ascension (J2000) 20- 21 I2 min RAm Right ascension (J2000) 23- 26 F4.1 s RAs Right ascension (J2000) 27 A1 --- u_RAs Uncertainty flag on Right ascension 29 A1 --- DE- Declination sign (J2000) 30- 31 I2 deg DEd Declination (J2000) 33- 34 I2 arcmin DEm Declination (J2000) 36- 37 I2 arcsec DEs Declination (J2000) 38 A1 --- u_DEs Uncertainty flag on Declination 40- 45 F6.2 deg GLON Galactic longitude 47- 51 F5.2 deg GLAT Galactic latitude 53- 56 F4.1 mag AB B-band extinction 58- 59 A2 --- Class Classification of candidate (3) 61 I1 ---- Bvis [0/1] Visibility in B band (G1) 62 I1 ---- Ivis [0/1] Visibility in I band (G1) 63 I1 ---- Jvis [0/1] Visibility in J band (G1) 64 I1 ---- Kvis [0/1] Visibility in K band (G1) 66- 69 A4 --- MType Morphological type 71- 75 F5.2 mag Imag ?=- Total I magnitude 77- 80 F4.2 mag e_Imag ?=- rms uncertainty on Imag 82- 86 F5.2 mag Jmag ?=- Total J magnitude 88- 91 F4.2 mag e_Jmag ?=- rms uncertainty on Jmag 93- 97 F5.2 mag Kmag ?=- Total K magnitude 99-102 F4.2 mag e_Kmag ?=- rms uncertainty on Kmag 104-107 F4.2 mag (I-J)0 ?=- Dereddened I-J colour index 109-112 F4.2 mag e_(I-J)0 ?=- rms uncertainty on (I-J)0 114-117 F4.2 mag (I-K)0 ?=- Dereddened I-K colour index 119-122 F4.2 mag e_(I-K)0 ?=- rms uncertainty on (I-K)0 124-127 F4.2 mag (J-K)0 ?=- Dereddened J-K colour index 129-132 F4.2 mag e_(J-K)0 ?=- rms uncertainty on (J-K)0 134 I1 --- q_Imag Quality of I-band photometry (4) 135 I1 --- q_Jmag Quality of I-band photometry (4) 136 I1 --- q_Kmag Quality of I-band photometry (4) 138-139 I2 arcsec Idiam ?=- Major diameter in I band 141-142 I2 arcsec Jdiam ?=- Major diameter in J band 144-145 I2 arcsec Kdiam ?=- Major diameter in K band
Note (1): Identity consisting of the lettering DZOA (for DENIS-ZOA) followed by the DENIS slot number and a consecutive number for each initial candidate Note (2): Total number of sightings of same galaxy (e.g., on overlap regions or repeat observations) Note (3): Classification as follows: DG = DENIS galaxy UG = uncertain galaxy BG = galaxy that was identified after consulting the WKK catalogue NG = B-band galaxy that was found to be non-galaxian with DENIS Note (4): Quality as follows: 0 = good photometry 2 = uncertainty in the 7"-aperture magnitude 3 = uncertainty in the total magnitude 4 = uncertainty in both 5 = means the 7"-aperture magnitude is unreliable 6 = unreliability in the total magnitude 7 = both 7"-aperture and total magnitude are unreliable 9 = the strip was non-photometric (strip 6052) and all photometry is unreliable (the estimated extinction due to the clouds in this case is ∼0.25-0.3mag. Magnitudes with quality parameters 5-9 have been excluded in the further analysis.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [DZOA] 5- 11 A7 --- DZOA DZOA designation (NNNN-NN) 12 A1 --- n_DZOA [a-d] Individual note (1) 14 I1 --- Nobs Total number of sightings of same galaxy 15- 16 A2 --- n_Nobs [+ ] + when additional observation from the pre-survey 18- 19 I2 h RAh Right ascension (J2000) 21- 22 I2 min RAm Right ascension (J2000) 24- 27 F4.1 s RAs Right ascension (J2000) 28 A1 --- u_RAs Uncertainty flag on Right ascension 30 A1 --- DE- Declination sign (J2000) 31- 32 I2 deg DEd Declination (J2000) 34- 35 I2 arcmin DEm Declination (J2000) 37- 38 I2 arcsec DEs Declination (J2000) 39 A1 --- u_DEs Uncertainty flag on Declination 41- 46 F6.2 deg GLON Galactic longitude 48- 52 F5.2 deg GLAT Galactic latitude 54- 58 F5.1 mag AB B-band extinction 60- 63 A4 --- Class Classification 65 I1 ---- Bvis [0/1] Visibility in B band (G1) 66 I1 ---- Ivis [0/1] Visibility in I band (G1) 67 I1 ---- Jvis [0/1] Visibility in J band (G1) 68 I1 ---- Kvis [0/1] Visibility in K band (G1) 70-108 A39 --- ONames Other names
Note (1): Individual notes as follows: a = While this object shows two apparent point sources in the K-band, the B- and I-bands clearly show an elongated compact extended emission with the brightest part positioned on one of the point sources. b = This object shows diffuse emission, as well as clumps, and possibly a dust lane. It could be a PN or a YSO seen on-edge. c = Very faint, it seems to show comparable features to DZOA4652-10 and DZOA4656-08. d = An extremely bright point source in the K-band, is also shows diffuse and clumpy extended emission and possible a dust lane in all bands.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [DZOA] 5- 11 A7 --- DZOA DZOA designation (NNNN-NN) 13- 14 I2 h RAh Right ascension (J2000) 16- 17 I2 min RAm Right ascension (J2000) 19- 22 F4.1 s RAs Right ascension (J2000) 23 A1 --- u_RAs Uncertainty flag on Right ascension 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 30 I2 arcmin DEm Declination (J2000) 32- 33 I2 arcsec DEs Declination (J2000) 34 A1 --- u_DEs Uncertainty flag on Declination 36- 39 F4.1 mag AB B-band extinction 41- 42 A2 --- Class Classification 44 I1 ---- Bvis [0/1] Visibility in B band (G1) 45 I1 ---- Ivis [0/1] Visibility in I band (G1) 46 I1 ---- Jvis [0/1] Visibility in J band (G1) 47 I1 ---- Kvis [0/1] Visibility in K band (G1) 49- 65 A17 --- 2MASX 2MASX designation (JHHMMSSss-DDMMSSs) 67- 69 A3 --- --- [WKK] 71- 74 I4 --- WKK ? WKK number (1) 76-117 A42 --- ONames Other names
Note (1): WKK number (WKK98 NNN in Simbad) from -- Fairall et al., 1998, Cat. J/A+AS/127/463, -- Woudt et al., 1998A&A...338....8W; 1999, Cat. J/A+A/352/39 and 2001, Cat. J/A+A/380/441.
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
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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