Catalogue MGC

Le Morphological Catalogue of Galaxies (MCG), ou Morfologiceskij Katalog Galaktik en russe ( « Catalogue morphologique des galaxies » ), est un catalogue de galaxies russe d'environ 34 000 galaxies compilé par Boris Vorontsov-Velyaminov et V. P. Arkhipova, et publié entre 1962 et 1974. Il renseigné à partir d'un examen approfondi de tirages des plaques du Palomar Observatory Sky Survey (POSS), et est réputé complet jusqu'à une magnitude photographique de 15

Vue qu'il serait presque impossible de mettre un catalogue de 34 000 galaxie . Voici un outils de recherche du catalogue MGC fait par la NASA

VII/240 Millennium Galaxy Catalogue (Liske+, 2003)
The Millennium Galaxy Catalogue: 16<=B_MGC_<24 galaxy counts
and the calibration of the local galaxy luminosity function.
Liske J., Lemon D.J., Driver S.P., Cross N.J.G., Couch W.J.
<Mon. Not. R. Astron. Soc., 344, 307 (2003)>
The Millennium Galaxy Catalogue: the space density and surface brightness
distribution(s) of galaxies,
Driver S.P., Liske J., Cross N.J.G., De Propris R., Allen P.D.
<Mon. Not. R. Astron. Soc., 360, 81 (2005)>
ADC_Keywords: Galaxy catalogs ; Galaxies, photometry ; Redshifts
Keywords: galaxies: general - cosmology: observations

The Millennium Galaxy Catalogue (MGC) is a 37.5deg^2^, medium-deep,
B-band imaging survey along the celestial equator, taken with the Wide
Field Camera on the Isaac Newton Telescope. The survey region is
contained within the regions of both the Two Degree Field Galaxy
Redshift Survey (2dFGRS) and the Sloan Digital Sky Survey Early Data
Release (SDSS-EDR). The survey has a uniform isophotal detection limit
of 26mag.arcsec^-2^ and it provides a robust, well-defined catalogue
of stars and galaxies in the range 16<=B_MGC_<24 mag.

Here we describe the survey strategy, the photometric and astrometric
calibration, source detection and analysis, and present the galaxy
number counts that connect the bright and faint galaxy populations
within a single survey. We argue that these counts represent the state
of the art and use them to constrain the normalizations ({phi}*) of a
number of recent estimates of the local galaxy luminosity function. We
find that the 2dFGRS, SDSS Commissioning Data (CD), ESO Slice Project,
Century Survey, Durham/UKST, Mt Stromlo/APM, SSRS2 and NOG luminosity
functions require a revision of their published {phi}* values by
factors of 1.05+/-0.05, 0.76+/-0.10, 1.02+/-0.22, 1.02+/-0.16,
1.16+/-0.28, 1.75+/-0.37, 1.40+/-0.26 and 1.01+/-0.39, respectively.
After renormalizing the galaxy luminosity functions we find a mean
local b_J_ luminosity density of 1.986+/-0.031x10^8^h L_{sun}_.Mpc^-3^

Acknowledging the Millennium Galaxy Catalogue:
The Millennium Galaxy Catalogue consists of imaging data from the
Isaac Newton Telescope and spectroscopic data from the Anglo
Australian Telescope, the ANU 2.3m, the ESO New Technology Telescope,
the Telescopio Nazionale Galileo, and the Gemini Telescope. The survey
has been supported through grants from the Particle Physics and
Astronomy Research Council (UK) and the Australian Research Council
(AUS). The data and data products are publicly available from or on request from J. Liske or S.P.

File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file
mgczcat.dat 854 69594 *Millennium Galaxy Catalogue
Note on mgczcat.dat: Original labels are indicated at the end of each
line, parenthesized and preceded by an equal sign.

See also: : Millennium Galaxy Catalogue Home Page : SuperCOSMOS Sky Surveys (SSS) Home Page
VII/226 : The 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS Team, 2001)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003)
J/AJ/123/567 : SDSS quasar catalog, I: EDR (Schneider+, 2002)
J/AJ/126/2579 : SDSS quasar catalog. II: DR1 (Schneider+, 2003)
J/MNRAS/304/297 : LSBG catalogue (Morshidi-Esslinger+, 1999)
J/AJ/127/646 : Unbiased census of AGN in 2MASS (PFr) (Francis+, 2004)

Byte-by-byte Description of file: mgczcat.dat
Bytes Format Units Label Explanations
1- 5 I05 --- MGC MGC object ID/serial number (=ID)
7- 9 I3 --- MGCFN MGC field number (=MGCFN)
11 I1 --- CCD CCD number (=CCD)
13- 19 F7.2 pix Xpos Object x position (=X_IMAGE)
21- 27 F7.2 pix Ypos Object y position (=Y_IMAGE)
29- 37 F9.5 deg RAdeg Object right ascension (J2000)
39- 47 F9.5 deg DEdeg Object declination (J2000) (=DELTA_J2000)
49- 55 F7.2 pix a Flux rms along major axis (=A_IMAGE)
57- 63 F7.2 pix b Flux rms along minor axis (=B_IMAGE)
65- 69 F5.1 deg PA [-90,+90] Position angle (=THETA_IMAGE)
71- 77 F7.2 pix HLRad Semi-major axis of half-light ellipse
79- 85 F7.2 pix FWHM FWHM assuming a Gaussian core (=FWHM_IMAGE)
87- 93 F7.2 ct Bkgrnd Background at object position (=BACKGRND)
95-100 F6.3 mag Bmag Best of MAG_AUTO and MAG_ISOCOR (=B_MGC)
102-107 F6.3 mag Bmagc B_MGC corrected for extinction (=B_MGC_DC)
109-114 F6.3 mag/arcsec2 Bmu Effective surface brightness (=MU_EFF)
116 I1 --- Qual Quality class (=QUALITY) (1)
118-121 F4.2 --- Stel [0/1] Stellaricity (=STEL) (1 for star)
123-124 I2 --- Class [0/15] Classification parameter (=CLASS) (2)
126 I1 --- xReg [0/1] Exclusion region flag (=INEXR) (3)
127-128 I2 --- NSDSS Number of SDSS objects matched to MGC
object (=SDSS_N)
130-147 A18 --- SDSSid SDSS PhotoObject ID (=SDSS_OBJID)
149-151 I3 --- SDSSrun SDSS run number (=SDSS_RUN)
153-154 I2 --- SDSSrun2 SDSS rerun number (=SDSS_RERUN)
156 I1 --- SDSScam SDSS camera column (=SDSS_CAMCOL)
158-160 I3 --- SDSSfld SDSS field number (=SDSS_FIELD)
162-170 F9.5 deg RA1deg ?=0 SDSS object right ascension (J2000)
172-180 F9.5 deg DE1deg ?=0 SDSS object declination (J2000)
182-187 F6.3 mag psfUmag ?=0 SDSS extinction corrected PSF magnitude
189-194 F6.3 mag psfGmag ?=0 SDSS extinction corrected PSF magnitude
196-201 F6.3 mag psfRmag ?=0 SDSS extinction corrected PSF magnitude
203-208 F6.3 mag psfImag ?=0 SDSS extinction corrected PSF magnitude
210-215 F6.3 mag psfZmag ?=0 SDSS extinction corrected PSF magnitude
217-222 F6.3 mag petUmag ?=0 SDSS extinction corrected Petrosian
magnitude (=SDSS_PETMAG_U)
224-229 F6.3 mag petGmag ?=0 SDSS extinction corrected Petrosian
magnitude (=SDSS_PETMAG_G)
231-236 F6.3 mag petRmag ?=0 SDSS extinction corrected Petrosian
magnitude (=SDSS_PETMAG_R)
238-243 F6.3 mag petImag ?=0 SDSS extinction corrected Petrosian
magnitude (=SDSS_PETMAG_I)
245-250 F6.3 mag petZmag ?=0 SDSS extinction corrected Petrosian
magnitude (=SDSS_PETMAG_Z)
252-257 F6.3 mag modUmag ?=0 SDSS extinction corrected model
magnitude (=SDSS_MODMAG_U)
259-264 F6.3 mag modGmag ?=0 SDSS extinction corrected model
magnitude (=SDSS_MODMAG_G)
266-271 F6.3 mag modRmag ?=0 SDSS extinction corrected model
magnitude (=SDSS_MODMAG_R)
273-278 F6.3 mag modImag ?=0 SDSS extinction corrected model
magnitude (=SDSS_MODMAG_I)
280-285 F6.3 mag modZmag ?=0 SDSS extinction corrected model
magnitude (=SDSS_MODMAG_Z)
287-292 F6.3 mag galUext SDSS Galactic extinction correction
294-299 F6.3 mag galGext SDSS Galactic extinction correction
301-306 F6.3 mag galRext SDSS Galactic extinction correction
308-313 F6.3 mag galIext SDSS Galactic extinction correction
315-320 F6.3 mag galZext SDSS Galactic extinction correction
322-327 F6.2 arcsec R50U SDSS radius containing 50% Petrosian flux
329-334 F6.2 arcsec R50G SDSS radius containing 50% Petrosian flux
336-341 F6.2 arcsec R50R SDSS radius containing 50% Petrosian flux
343-348 F6.2 arcsec R50I SDSS radius containing 50% Petrosian flux
350-355 F6.2 arcsec R50Z SDSS radius containing 50% Petrosian flux
357 I1 --- MType [0/6] SDSS morphological classification
359-360 I2 --- Class1 [0/8] MGC translation of MType (=SDSS_CLASS)
362 I1 --- SpClass [0/8] SDSS spectroscopic classification
364-365 I2 --- Class2 [0/14] MGC translation of SpClass
367 I1 --- N2dFGRS Number of 2dFGRS objects/spectra for this
MGC object (=TDFGRS_N)
369-378 A10 --- 2dFGRS 2dFGRS (Cat. <VII/226>) object name
380-385 I6 --- ID2dFGRS 2dFGRS sequence number (=TDFGRS_SEQNUM)
387-395 F9.5 deg RA2deg ?=0 2dFGRS object right ascension (J2000)
397-405 F9.5 deg DE2deg ?=0 2dFGRS object declination (J2000)
407-409 I3 --- UKST UKST survey field number (=TDFGRS_UKST)
411-416 F6.3 mag bJmag ?=0 2dFGRS final bJ magnitude (=TDFGRS_BJG)
418-423 F6.3 mag bJmagc ?=0 2dFGRS final extinction corrected b_J_
magnitude (=TDGRS_BJSEL)
425-430 F6.3 mag bJmagS ?=0 SuperCOSMOS Sky Surveys (=SSS) b_J_
magnitude (=TDFGRS_SBBJMAG)
432-437 F6.3 mag RmagS ?=0 SSS R magnitude (=TDFGRS_SRRMAG)
439 I1 --- Class3 [0/2] 2dFGRS classification (=TDGRS_IGAL)
441 I1 --- Class4 [0/1] MGC translation of Class3
443-458 A16 --- 2QZ 2QZ (Cat. <VII/233>) object name (=TQZ_NAME)
460-468 F9.5 deg RA3deg ?=0.00000 2QZ object right ascension
(J2000) (=TQZ_RA)
470-478 F9.5 deg DE3deg ?=+0.00000 2QZ object declination (J2000)
480-482 I3 --- UKST2qz ?=0 UKST survey field number (=TQZ_UKST)
485-490 F6.3 mag bJmag2 ?=0 2QZ bJ magnitude (=TQZ_BJ)
493-498 F6.3 mag U-bJ ?=0 2QZ U-bJ colour (=TQZ_UMBJ)
500-506 F7.3 mag bJ-R ?=0.000 2QZ bJ-R colour (=TQZ_BJMR)
508-513 F6.4 mag E(B-V) ?=0.0000 2QZ color excess E(B-V) (=TQZ_DUST)
515 I1 --- N2qz Number of 2QZ spectra for this
MGC object (=TQZ_NOBS)
517-526 A10 --- T2qz 2QZ type (=TQZ_IDENT)
528 I1 --- Class5 [0/8] MGC translation of T2qZ (=TQZ_CLASS)
530 I1 --- NNED Number of NED objects matched to this
MGC object (=NED_N)
532-561 A30 --- NEDname NED object name (=NED_NAME)
563-571 F9.5 deg RA4deg ?=0 NED object right ascension (J2000)
573-581 F9.5 deg DE4deg ?=0 NED object declination (J2000)
583-585 A3 --- NEDID NED identification (=NED_IDENT)
587 I1 --- Class6 [0/7] MGC translation of NEDID (=NED_CLASS)
590-596 A7 --- PFr PFr (Cat. <J/AJ/127/646>) object name
598-606 F9.5 deg RA5deg ?=0.00000 PFr object right ascension
(J2000) (=PF_RA)
608-616 F9.5 deg DE5deg ?=0.00000 PFr object declination (J2000)
618-622 F5.2 mag Rmag ?=0.00 PFr R magnitude from USNO (=PF_R)
624-628 F5.2 mag Kmag ?=0.00 PFr K magnitude from 2MASS (=PF_K)
630-634 F5.3 mag J-K ?=0.000 PFr J-K colour from 2MASS (=PF_JMK)
636-647 A12 --- LSBG LSBG (Cat. <J/MNRAS/304/297>) object name
649-657 F9.5 deg RA6deg ?=0.00000 LSBG object right ascension
(J2000) (=LSBG_RA)
659-667 F9.5 deg DE6deg ?=+0.00000 LSBG object declination (J2000)
669-673 F5.2 mag BTOT ?=0.00 LSBG total B magnitude (=LSBG_BTOT)
675-679 F5.2 mag/arcsec2 SuBr ?=0.00 LSBG central surface brightness
681-685 F5.2 mag/arcsec2 SuBreff ?=0.00 LSBG effective surface brightness
687-692 F6.2 arcsec Reff ?=0.00 LSBG effective radius (=LSBG_REFF)
698-701 A4 --- --- [MGCz] Identifier for following z and q_z
703-710 F8.5 --- z1 ?=9.99999 MGCz heliocentric redshift
712 I1 --- q_z1 ?=9 MGCz redshift quality (=MGCZ_ZQUAL) (4)
714-721 A8 --- --- [SDSS-DR1] Identifier for following z & q_z
723-730 F8.5 --- z2 ?=9.99999 SDSS redshift (=SDSS_Z)
732 I1 --- q_z2 ?=9 SDSS redshift quality (=SDSS_ZQUAL) (4)
736-741 A6 --- --- [2dFGRS] Identifier for following z and q_z
743-750 F8.5 --- z3 ?=9.99999 2dFGRS heliocentric redshift
752 I1 --- q_z3 ?=9 2dFGRS redshift quality (=TDFGRS_ZQUAL)
See note (4)
759-761 A3 --- --- [2QZ] Identifier for following z and q_z
764-770 F7.5 --- z4 ?=9.99999 2QZ redshift (=TQZ_Z)
772 I1 --- q_z4 ?=9 2QZ redshift quality (=TQZ_ZQUAL) (4)
779-781 A3 --- --- [NED] Identifier for following z and q_z
784-790 F7.5 --- z5 ?=9.99999 NED heliocentric redshift
792 I1 --- q_z5 ?=9 NED redshift quality (=NED_ZQUAL) (4)
794-801 A8 --- --- [PFRANCIS] Identifier for following z & q_z
803-810 F8.5 --- z6 ?=9.99999 PFr redshift (=PF_Z)
812 I1 --- q_z6 ?=9 PFr redshift quality (=PF_ZQUAL) (4)
818-821 A4 --- --- [LSBG] Identifier for following z and q_z
824-830 F7.5 --- z7 ?=9.99999 LSBG heliocentric redshift
832 I1 --- q_z7 ?=9 LSBG redshift quality (=LSBG_ZQUAL) (4)
834-841 A8 --- r_z Choice for best redshift+quality (=ZSOURCE)
843-850 F8.5 --- z ?=9.99999 Best redshift (=BEST_Z)
852 I1 --- q_z ?=9 Quality of best redshift (=BEST_ZQUAL)
See note (4)
854 I1 --- Nsp Total number of spectra for this object

Note (1): Photometric quality parameter:
This parameter describes the reliability of an object's photometric
parameters depending on the level of
- contamination by CCD defects satellite trails, cosmic rays and
diffraction spikes
- blending with a similarly bright object
- missing light due to a CCD edge
- failed background estimation due to nearby very bright objects.
0: Unclassified
1: Photometric parameters are reliable.
2: Photometric parameters are probably ok.
3: Photometric parameters are unreliable. All objects with
Qual=3 lie in exclusion regions.

Note (2): Classification parameter is defined as follows:
0: Unclassified
1: Galaxy
2: Reserved for morphological classification of galaxies
3: Reserved for morphological classification of galaxies
4: Reserved for morphological classification of galaxies
5: Currently unused
6: Currently unused
7: QSO
8: Star
9: Asteroid
10: Satellite trail
11: Cosmic ray
12: CCD defect
13: Diffraction spike
14: Other (noise)
15: Obsolete (ie. replaced by a new catalogue entry)

Note (3): Exclusion region flag:
0: Object is not in an exclusion region
1: Object is in an exclusion region

Note (4): Spectroscopic quality parameter
(Normally only redshifts with q_z>=3 should be used):
1: Something is clearly wrong with the spectrum or there is
absolutely no flux. Redshift measurement is not possible.
Redshifts with this q_z are meaningless
2: Low quality spectrum. Probability that redshift is correct is low.
3: Reasonable spectrum. Redshift is probably correct.
4: Good quality spectrum. Very reliable redshift.
5: very good quality spectrum. Very reliable redshift.
9: The database contains no spectroscopic information for this object

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(End) James Marcout, Patricia Vannier [CDS] 07-May-2004

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