Access to Astronomical Catalogues

← Click to display the menu
VII/221                     PSCz catalog                       (Saunders+, 2000)

The PSCz catalogue Saunders W., Sutherland W.J., Maddox S.J., Keeble O., Oliver S.J., Rowan-Robinson M., McMahon R.G., Efstathiou G.P., Tadros H., White S.D.M., Frenk C.S., Carraminana A., Hawkins M.R.S. <Mon. Not. R. Astron. Soc. 317, 55 (2000)> =2000MNRAS.317...55S
ADC_Keywords: Infrared sources ; Photometry, infrared ; Galaxies, optical; Redshifts ; Surveys Keywords: catalogues - surveys - galaxies: distances and redshifts, clustering - large-scale structure of the Universe Description: The PSCz survey consists of redshifts, infra-red and optical photometry, and assorted other information for 18351 IRAS sources, mostly selected from the Point Source Catalog. The survey was designed to select almost all galaxies with flux brighter than 0.595Jy at 60 microns, over the 84% of the sky with extinction small enough that reliable and complete optical identification and spectroscopy was possible. Some of the sources are not galaxies and some are multiple entries for the same galaxy as described below. There are in total 15411 galaxies or possible galaxies, for which redshifts are available for 14677. The galaxies without redshift are mostly distant or at low latitude, as described below. Many of these galaxies have now been observed as part of the BTP project (Saunders et al 1999, astro-ph/9909174 "The Behind the Plane Survey"), and their redshifts will be included in future revisions of the catalogue. The main catalogue is "pscz.dat". There is also a short version of the catalogue, "psczvs.dat", containing sufficient information for most studies. They correspond to the version 2.2. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file notes.txt 79 468 Explanatory notes pscz.dat 533 18351 Main catalogue psczvs.dat 100 18411 Short version of main catalogue psczcg.dat 533 60 Sources close to coverage gap psczcgvs.dat 100 60 Short version of psczcg.dat psczcat3.tex 836 849 Text for the accompanying paper 132 203058 Postscript version pscz2_2.dat 141 73404 Original version of pscz.dat with 4 lines/source, explained in "notes.txt" psczmask.dat 78 506 *Default mask defining the areas with inadequate or confused IRAS coverage (10.56sr) himask.dat 78 883 *More conservative mask for higher completeness (9.06sr) qcd.f 80 1112 Routines for using mask, coordinate transforms etc g2bin.f 45 9 (l,b) to bin number psi.f 76 18 Estimated selection function igalrefs.txt 61 48 Redshift references ilg.dat 124 11 Local Group galaxies deliberately excluded
Note on psczmask.dat, himask.dat: list of excluded 'lune bins' and are read in by the fortran77 routine rdmask in "qcd.f" (see file "notes.txt")
See also: II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986) II/174 : IRAS 2Jy Redshift Survey Data File (Strauss+ 1992) VII/185 : IRAS 1.2 Jy IRAS Redshift Survey (Strauss+ 1990,92,95) J/MNRAS/253/485 : QMW IRAS galaxy catalogue (QIGC) (Rowan-Robinson+, 1991) J/MNRAS/308/897 : QDOT all-sky IRAS galaxy redshift survey (Lawrence+, 1999) Byte-by-byte Description of file: psczcg.dat pscz.dat
Bytes Format Units Label Explanations
2- 12 A11 --- CNAME *Name e.g. Q12345+4856 14- 15 I2 h RAh Right ascension B1950 16- 17 I2 min RAm Right ascension B1950 18- 20 I3 0.1s RAds Right ascension B1950 22 A1 --- DE- Declination sign B1950 23- 24 I2 deg DEd Declination B1950 25- 26 I2 arcmin DEm Declination B1950 27- 28 I2 arcsec DEs Declination B1950 29- 36 F8.2 Jy S12 Flux at 12um 37- 44 F8.2 Jy S25 Flux at 25um 45- 52 F8.2 Jy S60 Flux at 60um 53- 60 F8.2 Jy S100 Flux at 100um 62 I1 --- q_S12 *[1,9] Flux origin and quality flag at 12um 63 I1 --- q_S25 *[1,9] Flux origin and quality flag at 25um 64 I1 --- q_S60 *[1,9] Flux origin and quality flag at 60um 65 I1 --- q_S100 *[1,9] Flux origin and quality flag at 100um 67 I1 --- SES12 [0,8] Small Extended Source flag at 12um 68 I1 --- SES25 [0,8] Small Extended Source flag at 25um 69 I1 --- SES60 [0,8] Small Extended Source flag at 60um 70 I1 --- SES100 [0,8] Small Extended Source flag at 100um 72- 74 I3 % e_S12 Flux uncertainty at 12um 75- 77 I3 % e_S25 Flux uncertainty at 25um 78- 80 I3 % e_S60 Flux uncertainty at 60um 81- 83 I3 % e_S100 Flux uncertainty at 100um 85- 87 I3 arcsec PosMin Minor axis of 2σ error ellipse 88- 90 I3 arcsec PosMax Major axis of 2σ error ellipse 91- 93 I3 deg PosPA Position angle E of N of major axis of error ellipse 95 I1 --- Cirr1 *Cirrus flag 96 I1 --- Cirr2 *Cirrus flag 97- 99 I3 MJy/sr Cirr3 *Cirrus flag 101 A1 --- CC1 [A-N X] Correlation Coefficient at 12um 102 A1 --- CC2 [A-N X] Correlation Coefficient at 25um 103 A1 --- CC3 [A-M X1] Correlation Coefficient at 60um 104 A1 --- CC4 [A-N X1] Correlation Coefficient at 100um 106 A1 --- CONF [0-9 ACDEF] Confusion flag, hex encoded 107 A1 --- DISC [0-9 A-D] Discrepant flux flag, hex encoded 108 A1 --- HSD [0-8] High Source Density flag, hex encoded 110 I1 --- PNEARH [0-9] Nearby hours-confirmed sources 111 I1 --- PNEARW [0-5] Nearby weeks-confirmed sources 113 I1 --- CES12 *Nearby seconds confirmed extended sources at 12um 114 I1 --- CES25 *Nearby seconds confirmed extended sources at 25um 115 I1 --- CES60 *Nearby seconds confirmed extended sources at 60um 116 I1 --- CES100 *Nearby seconds confirmed extended sources at 100um 117-121 I5 --- SNR60 10 x signal/noise of weakest detection at 60um 122-123 I2 --- NHCON Number of hours-confirmed source detections 124-125 I2 --- MHCON Potential number of hours-confirmed source detections 127-130 I4 --- FCOR60 *1000*flux correction factor applied at 60um 132-136 A5 --- PLATE Plate number (POSS or SRC) 138-144 A7 --- NOM Nominal plate centre in RA,dec 146-148 I3 --- NUM Identifier for source on this plate 150-151 I2 h RAo.h ? Optical right ascension B1950 152-153 I2 min RAo.m ? Optical right ascension B1950 154-158 F5.2 s RAo.s ? Optical right ascension B1950 160 A1 --- DEo.- ? Optical declination sign B1950 161-162 I2 deg DEo.d ? Optical declination B1950 163-164 I2 arcmin DEo.m ? Optical declination B1950 165-168 F4.1 arcsec DEo.s ? Optical declination B1950 170-172 I3 arcsec ADX ? North/South Delta Optical/IRAS position 173-175 I3 arcsec ADY ? East/West Delta Optical/IRAS position 176-179 F4.1 --- ALK ? log_10 likelihood for optical identification 180-182 I3 % REL ? Prob. correct optical identification 183 A1 --- CAND ? Optical candidate A,B etc 184 I1 --- IOPT *? Schmidt plate material used 185-190 F6.2 mag Bmag ? Estimated optical B magnitude 191-193 I3 arcsec MajAxiO ? Optical major axis 194-196 I3 arcsec MinAxiO ? Optical minor axis 197-199 I3 deg PAO ? Optical major axis position angle E of N 200-206 F7.3 mag/arcsec+2 SuBr ? Average optical surface brightness 207-208 I2 --- IDTYPE Cross-identification type from PSC 209-220 A12 --- Oname Optical name 221-226 F6.2 mag mag Zwicky/RC3 magnitude 227-231 F5.1 arcmin D1X *RC3/UGC/MCG/ESO D25 diameter from CATX 232-234 I3 % AR *Axial ratio d25/D25 from CATX 235-240 I6 km/s Hvel Best available heliocentric velocity (cz) 241-244 I4 km/s e_Hvel Error on heliocentric velocity 245-247 I3 --- r_Hvel *Reference for heliocentric velocity 248-253 I6 km/s Hvel2 Heliocentric velocity (cz) measured as part of PSCz survey 254-257 I4 km/s e_Hvel2 Error on PSCz heliocentric velocity 258-260 I3 --- r_Hvel2 *Reference for PSCz heliocentric velocity 261-262 I2 --- TType De Vaucouleurs Type, 99 = unknown 264-271 A8 --- PGC Catalogue of Principal Galaxies (PGC, Cat. VII/119) name 273-280 F8.4 deg RAdeg Right ascension B1950 (IRAS source) 282-289 F8.4 deg DEdeg Declination B1950 (IRAS source) 291-298 F8.4 deg GLON Galactic longitude 300-307 F8.4 deg GLAT Galactic latitude 308-313 I6 km/s cz Velocity cz in Local Group frame 314-318 F5.1 Mpc Dist Distance from Rowan-Robinson 1988 319-322 I4 --- IDclus Cluster identification from Rowan-Robinson 1988 324-328 F5.2 [MJy/sr] ALI100 *log10(100um background in MJy/sr) 329-333 F5.2 [MJy/sr] ALI100B *log10(100um background in MJy/sr for lune bin) 334-339 I6 --- NLBIN Lune bin number 341-342 A2 --- CLASS *Optical classification code 344-348 A5 --- CSEC PSCz sector, e.g. A/123 349-352 I4 mm Xpos X position from nominal bottom left corner of Schmidt plate 353-356 I4 mm Ypos Y position from nominal bottom left corner of Schmidt plate 358 A1 --- CSTAT [JORXPCELS?0] Optical material used 359 A1 --- CAREA h=high|b|, p=other PSCz, l=BTP, c=in coverage gaps 360 A1 --- CZSTAT *[#-1234lpxq] Redshift status 362 A1 --- C12CLAS Classification in 1.2Jy survey 363-370 F8.2 Jy F3PSC PSC flux at 60um 371-378 F8.2 Jy F4PSC PSC flux at 100um 379-383 F5.2 mag ABB *Estimated average B extinction in lune bin derived from 100 micron background 385 A1 --- CPSCZ *[^&=-+] Source category 386-387 I2 --- MHCONB * 2 or ≥3 hours-confirmed coverages for this lune bin 389 A1 --- CQDOT [q] q = in QDOT 1-in-6 sample 390-393 I4 km/s W20 *HI (21cm) 20% velocity width or flag 394-395 I2 km/s e_W20 Error on W20 396-399 I4 km/s W50 *HI (21cm) 50% velocity width or flag 400-401 I2 km/s e_W50 Error on W50 402-403 I2 --- r_W20 *HI reference 404-410 F7.3 Jy FP12 Addscan flux at 12um using point source template 411-419 F9.3 Jy FP25 Addscan flux at 25um using point source template 420-428 F9.3 Jy FP60 Addscan flux at 60um using point source template 429-437 F9.3 Jy FP100 Addscan flux at 100um using point source template 439-442 I4 mJy e_FP12 Statistical error in FP12 443-446 I4 mJy e_FP25 Statistical error in FP25 447-450 I4 mJy e_FP60 Statistical error in FP60 451-454 I4 mJy e_FP100 Statistical error in FP100 456 I1 --- BP12 Background fit subtracted or not at 12um 457 I1 --- BP25 Background fit subtracted or not at 25um 458 I1 --- BP60 Background fit subtracted or not at 60um 459 I1 --- BP100 Background fit subtracted or not at 100um 460-468 F9.3 Jy FE12 Coadded or extended addscan flux at 12um 469-477 F9.3 Jy FE25 Coadded or extended addscan flux at 25um 478-486 F9.3 Jy FE60 Coadded or extended addscan flux at 60um 487-495 F9.3 Jy FE100 Coadded or extended addscan flux at 100um 497-500 I4 mJy e_FE12 Statistical error in FE12 501-504 I4 mJy e_FE25 Statistical error in FE25 505-508 I4 mJy e_FE60 Statistical error in FE60 509-512 I4 mJy e_FE100 Statistical error in FE100 514 I1 --- BE12 *[0-2] Background fit at 12un 515 I1 --- BE25 *[0-2] Background fit at 25um 516 I1 --- BE60 *[0-2] Background fit at 60um 517 I1 --- BE100 *[0-2] Background fit at 100um 518-525 F8.4 arcmin+2 WIDTH2 Addscan width squared at 60um 526-533 F8.4 arcmin+2 e_WIDTH2 Error on WIDTH2
Note on CPSCZ: source category: = PSC (or PSC reject file) source, and not a large-diameter optical galaxy. + addscanned large optical galaxy added to PSCz. - PSC source associated with a "+" addscan object (normally excluded). & high latitude PSCz source, but in a bin excluded by psczmask.dat . ^ high latitude optical galaxy, in a bin excluded by psczmask.dat . Note on CZSTAT: redshift status: 1 PSCz redshift, excellent quality 2 PSCz redshift, good quality 3 PSCz redshift, low s/n but secure 4 PSCz redshift, marginal detection, unreliable l literature redshift, see r_Hvel for details. p private communication, see r_Hvel for details. q redshift from QDOT (J/MNRAS/308/897) or QCCOD # redshift wanted for PSCz, but still unknown x Give up, too optically faint (B or b_J > 19.5 mag) - Don't need it: galactic source, duplicate, part of larger galaxy etc. Note on CNAME: IRAS Names. Digits hhmmm+ddmm as in PSC. The initial letter means: Q: from QIGC (Cat. J/MNRAS/253/485) P: from PSC (Cat. II/215) R: from PSC reject file O: from optical catalogue Note on q_S12, q_S25, q_S60, q_S100: 1 = upper limit, 2 = moderate, 3 = OK, 4 = new HCON merged flux, 5 = addscanned flux/1.1, 6 = coadded flux, 7 = addscanned flux with point source template, 9 = single HCON. Note on CES12, CES25, CES60, CES100: 1 = flagged as confirmed extended source, 2 = in SSS (Small Scale Structure) catalog (Cat. VII/73) 3 = in Large Galaxy Catalog, 4 = addscan flux, 5 = addscan flux, source is double, 6 = coadd flux, 7 = coadd flux, source is double, 8 = addscanned flux, Yahil software used, 9 = addscanned point source flux, Yahil software used. 2-8 data from QIGC, there should be none in here except class='ds' sources. Note on Cirr1, Cirr2, Cirr3: The cirrus flag measures the number of sources detected only at 100µm in a 1-°2 area around the source Note on FCOR60: FCOR60 = NINT(FCOR(3) *1000) FCOR = correction factors applied to correct for overestimated faint fluxes as in Explanatory Supp. For the supplementary single-HCON sources, we have applied a factor of 1.121, as used in the PSC for 2 out of possible 4 HCON detections. For merged single-HCON sources, unmerged in PSC due to software errors, we have corrected the correction factors accordingly. Note on IOPT: Source of Schmidt plate material. 1 = POSS-O/APM, 2 = SRC-bJ/APM, 3,4,5 = SRC-bJ/Cosmos, 6 = SR/Cosmos, 7 = POSS-E/APM, 9 = RC3 diameters . The optical information from plate scans is for the candidate with the best likelihood, not necessarily that for which the redshift is taken. The probability that these are the same depends strongly on latitude; at high latitude they are very reliable. The optical material is heterogeneous and except for IOPT=2 is uncalibrated. IOPT=6 magnitudes are estimated red mags, otherwise B or b_J. Due to saturation, magnitudes brighter than about 16 mag are very unreliable. Where a correct bright galaxy has been misclassified by the source-finding software as a star, the magnitude will be meaningless. Note on D1X, AR: CATX is the all-sky optical galaxy compilation based on the CGCG, UGC, MGC and the ESO catalogues Note on r_Hvel, r_Hvel2: Velocity references (negative reference numbers are PSCz or private communication) -99 INT/FOS or AAT/FORS -98 NOT -97 CTIO 60" -96 Fairall for PSCz -95 Nancay measurements for PSCz -94 AAT service data -93 INT/IDS500 -92 Cananea -91 Parkes -90 WHT/FOSII -32 Juraszek -31 Visnanathan -30 Kraan-Kortweg -29 Lu, Pantoja -28 Nancay -27 Chamaraux, Yamada, Takata, Nakanishi -25 WHT Ultraluminous -24 QCCOD pole extension -23 QCCOD -21 Giovanelli + Haynes -20 DaCosta -10 - 70 as in Huchra 1991, See Cat. VII/193 83 QDOT, Lawrence et al., Cat. J/MNRAS/308/897 84 Leech et al., 1988MNRAS.231..977L 85 NED, see 86 PGC (Cat. VII/119), LEDA 87 1.2Jy, Cat. VII/185 88 Allen et al., 1990ApJ...355..130A 89 Seeberger 90 RC3 HI, Cat. VII/155 91 RC3 optical, Cat. VII/155 92 Fairall 97 Tully 1987ApJ...321..280T 98 Lonsdale and Hacking 1989ApJ...339..712L, Lonsdale 1986 (see Eales et al., 1988ApJ...328..530E) Note on ALI100, ALI100B, ABB: 100um backgrounds from Rowan-Robinson et al., 1991MNRAS.249..729R ALI4 is the background in a 0.5 degree beam centered on the source, corrected for that point source only. ALI4B is the background averaged over lune bin, and is corrected for all IGAL sources. ABB is based on ALI4B, and has been crudely corrected for temperature variation of dust across the galaxy. Note on MHCONB: MHCONB is the number of HCON coverages, crudely estimated from Explanatory Supp Fig I.C.1, for comparing source counts, fluxes etc. Note on W20, W50: The HI data is extremely heterogeneous in quality, reduction and linewidth definition. -999 = private, -997 = not reduced, -996 = to be observed, -995 = s/n < 5 -994 = detected OK but not measured, -1 = non-detection, -2 = confused, Note on r_W20: HI references: -5 Parkes (Cat. VIII/15) -4 Nancay for PSCz -3 Lu -2 Bottinelli -1 Giovanelli and Haynes 1 LEDA 2 Pantoja 1997, Cat. J/AJ/113/905 3 Seeberger 1994, Cat. J/A+A/286/17 Note on BE12, BE25, BE60, BE100: 0=no 1=yes 2=coadded flux Note on CLASS: object classification from optical data etc. g : galaxy or galaxies gf: faint galaxy, B or b_j > 19.5 mag. go: optical galaxy with 1D addscanned flux gr: Rice et al galaxy with 2D coadded photometry ss: Star, confirmed spectroscopically (by us, 1.2 Jansky or de Grijp) bs: Bright star from plate or telescope TV, no spectrum is: Star from IRAS colours and plate/TV appearance c : Cirrus pn: Planetary Nebula rn: Reflection Nebula h2: HII region zz: Other galactic source lm: in Large Magellanic Cloud sm: in Small Magellanic Cloud vb: Visually blank on sky survey plates, no non-stellar id kb: K' image blank, no non-stellar id rb: Radio blank, no 6 or 20cm id de: delete from catalogue, part of extended galaxy d1: delete from catalogue, broken up 1HCON source already listed elsewhere du: deleted optical galaxy, part of multiple system unresolved by IRAS dr: deleted optical galaxy, already in as Rice etal galaxy ao: PSC source associated with addscanned optical galaxy ar: PSC source associated with Rice etal optical galaxy The divisions above between Galactic classifications 'pn','rn' etc are not rigorous. The CLASS='go' and 'gr' sources were optically selected (see accompanying paper) and their IRAS fluxes determined by addscanning or coadding. Their fluxes (F12 to F100) are addscan or coadded fluxes, reduced by a factor 1.1 to bring them statistically into line with PSC fluxes. Where the resulting flux F(3) is 0.6 Jy or greater, they are added to the catalogue and flagged with CPSCZ='+'. There are 1467 such sources representing 1402 individual galaxies resolved by IRAS. The associated PSC source is retained in the catalogue, but is flagged as CPSCZ='-' and will normally be excluded (1290 sources).
Byte-by-byte Description of file: psczvs.dat psczcgvs.dat
Bytes Format Units Label Explanations
1- 9 A9 --- CPNAME PSCz name eg A/123/456 11 A1 --- CPSCZ Source category 12 A1 --- CZSTAT Redshift status 13- 14 A2 --- CLASS Optical classification code 16- 17 I2 h RAh Rigth ascension B1950 18- 19 I2 min RAm Rigth ascension B1950 20- 22 I3 0.1s RAds Rigth ascension B1950 24 A1 --- DE- Declination sign B1950 25- 26 I2 deg DEd Declination B1950 27- 28 I2 arcmin DEm Declination B1950 29- 30 I2 arcsec DEs Declination B1950 31- 36 F6.1 deg GLON Galactic longitude 37- 42 F6.1 deg GLAT Galactic latitude 43- 50 F8.2 Jy F60 Flux at 60um 51- 56 I6 km/s Vhel Best available heliocentric velocity (cz) 57- 60 I4 km/s e_Vhel Error on heliocentric velocity 61- 63 I3 --- r_Vhel Reference for heliocentric velocity 64- 75 A12 --- Oname Optical name 76- 79 I4 MJy/sr I100B 100 micron background for that lune bin 80- 84 F5.2 mag ABB Estimated average B extinction for that lune bin 86 A1 --- CHSD High Source Density flag, hex encoded 88 A1 --- MHCONB 2 or ≥3 hours-confirmed coverages for this lune bin 89- 94 F6.2 --- F100/F60 Ratio of 100micron/60micron flux, (negative means upper limit at 100um) 95-100 I6 --- NLBIN Lune bin
General Notes: Many fields are taken directly from Point Source Catalogue (II/125). See IRAS Explanatory Supplement (Beichman et al., 1988NASAR1190....1B) for more information. If there are problems that cannot be resolved by careful reading of these notes or the accompanying paper, please contact Will Saunders () or Will Sutherland (). Acknowledgements: Will Saunders
(End) Will Saunders [ROE], Patricia Bauer [CDS] 19-May-2000
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

catalogue service