J/A+A/476/59 Fornax Cluster Spectroscopic Survey 2MASS galaxies (Morris+ 2007)
2MASS Galaxies in the Fornax Cluster Spectroscopic Survey. Morris R.A.H, Phillipps S., Jones J.B., Drinkwater M.J., Gregg M.D, Couch W.J., Parker Q.A., Smith R.M. <Astron. Astrophys. 476, 59 (2007)> =2007A&A...476...59M
ADC_Keywords: Surveys ; Clusters, galaxy ; Redshifts ; Photometry, infrared Keywords: surveys - galaxies: statistics - galaxies: clusters: individual: Fornax Abstract: The Fornax Cluster Spectroscopic Survey (FCSS) is an all-object survey of a region around the Fornax Cluster of galaxies undertaken using the 2dF multi-object spectrograph on the Anglo-Australian Telescope. Its aim was to obtain spectra for a complete sample of all objects with 16.5<bj<19.7 irrespective of their morphology (i.e. including `stars', `galaxies' and `merged' images). We explore the extent to which (nearby) cluster galaxies are present in 2MASS. We consider the reasons for the omission of 2MASS galaxies from the FCSS and vice versa. We consider the intersection (2.9 square degrees on the sky) of our data set with the infra-red 2 Micron All-Sky Survey (2MASS), using both the 2MASS Extended Source Catalogue (XSC) and the Point Source Catalogue (PSC). We match all the XSC objects to FCSS counterparts by position and also extract a sample of galaxies, selected by their FCSS redshifts, from the PSC. We confirm that all 114 XSC objects in the overlap sample are galaxies, on the basis of their FCSS velocities. A total of 23 Fornax Cluster galaxies appear in the matched data, while, as expected, the remainder of the sample lie at redshifts out to z=0.2 (the spectra show that 61% are early type galaxies, 18% are intermediate types and 21% are strongly star forming). The PSC sample turns out to contain twice as many galaxies as does the XSC. However, only one of these 225 galaxies is a (dwarf) cluster member. On the other hand, galaxies which are unresolved in the 2MASS data (though almost all are resolved in the optical) amount to 71% of the non-cluster galaxies with 2MASS detections and have redshifts out to z=0.32. Description: We present two tables, the results of matching the Fornax Cluster Spectroscopic Survey (FCSS) both with the 2MASS extended source catalogue (XSC) and the 2MASS point source catalogue (PSC, Cat. II/246). The 2MASS 2nd release data described in Jarrett et al. (2000AJ....119.2498J) is used in this paper. xsc-fcss.dat contains 114 extended objects in a circle of radius 1degree centred on NGC1399, 84 are matched in the FCSS itself using a positional error of 3", 28 are in the brighter FLAIR sample of Drinkwater et al. (2001ApJ...548L.139D) and two are 15th magnitude galaxies in the Ferguson (1989AJ.....98..367F, Cat. VII/180) Fornax Cluster Catalogue (FCC). psc-fcss.dat contains objects that are in the 2MASS PSC and also in the FCSS again using a positional error of 3". Objects with cz of less than 900km/s are removed as are objects which are also in the extended sample above to leave a sample of 228 confirmed galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file psc-fcss.dat 58 228 Point sources in 2MASS PSC and Fornax Cluster Spectroscopic Survey xsc-fcss.dat 65 114 Extended objects in 2MASS XSC and also in Fornax galaxy catalogues
See also: VII/180 : Galaxies in Fornax Cluster and five nearby groups (Ferguson+ 1990) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: psc-fcss.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Galaxy name (G1) 8- 9 I2 h RAh Right ascension (J2000.0) 11- 12 I2 min RAm Right ascension (J2000.0) 14- 17 F4.1 s RAs Right ascension (J2000.0) 19 A1 --- DE- Declination sign (J2000.0) 20- 21 I2 deg DEd Declination (J2000.0) 23- 24 I2 arcmin DEm Declination (J2000.0) 26- 27 I2 arcsec DEs Declination (J2000.0) 29- 32 F4.1 mag bjmag b_j_ magnitude (G2) 34- 39 I6 km/s cz Recession velocity (heliocentric redshift) 41- 43 A3 --- Type Galaxy type (G3) 45- 48 F4.1 mag Jmag 2MASS J magnitude 50- 53 F4.1 mag Hmag 2MASS H magnitude 55- 58 F4.1 mag Kmag 2MASS K magnitude
Byte-by-byte Description of file: xsc-fcss.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Galaxy name (G1) 8- 9 I2 h RAh Right ascension (J2000.0) 11- 12 I2 min RAm Right ascension (J2000.0) 14- 17 F4.1 s RAs Right ascension (J2000.0) 19 A1 --- DE- Declination sign (J2000.0) 20- 21 I2 deg DEd Declination (J2000.0) 23- 24 I2 arcmin DEm Declination (J2000.0) 26- 27 I2 arcsec DEs Declination (J2000.0) 29- 32 F4.1 mag bjmag b_j magnitude (G2) 34- 37 F4.1 mag/arcsec+2 SB ? Surface Brightness (1) 39- 44 I6 km/s cz Recession velocity 46- 50 A5 --- Type Galaxy type (G3) 52- 55 F4.1 mag Jmag 2MASS J magnitude 57- 60 F4.1 mag Hmag 2MASS H magnitude 62- 65 F4.1 mag Kmag 2MASS K magnitude
Note (1): SB is the estimated central surface brightness in bj magnitudes per square arc second, obtained from an exponential fit to the outer regions (Drinkwater et al., 2000A&A...355..900D). This will be only a notional value for giant ellipticals.
Global notes: Note (G1): Names are the Fornax Cluster Catalogue of Ferguson (FCC, 1989, Cat. VII/180) numbers if available (e.g. 136 and B0886). The FCC contains cross-references to other previous catalogues. Where no FCC number exists, the galaxy is labelled FCSS and, following the NED usage, the name will be "FCSS" followed by the IAU co-ordinate (J2000) designations. Note (G2): bj magnitudes are from our input catalogues (Drinkwater et al., 2000A&A...355..900D ) except for the interacting pair ESO358-IG031 (= B1095), where the individual magnitudes have been taken from NED. Note (G3): Spectral classification, mostly from either the FLAIR data of Drinkwater et al. (2001ApJ...548L.139D) denoted by `f' and a galaxy type or from the FCSS spectroscopic template matching: types G0, G6, K5, M1 or em (for emission line).
Acknowledgements: Rhys Morris, R.Morris(at)bristol.ac.uk
(End) Rhys ap Hywel Morris [Bristol Univ.], Patricia Vannier [CDS] 04-Sep-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|