J/ApJS/97/77 Catalog of Coma Cluster Galaxies (Doi+ 1995)
Automated Surface Photometry for the Coma Cluster Galaxies: The Catalog
Doi M., Fukugita M., Okamura S., Tarusawa K.
<Astrophys. J. Suppl. Ser. 97, 77 (1995)>
=1995ApJS...97...77D 1995ApJS...97...77D
ADC_Keywords: Clusters, galaxy; Galaxies, optical; Positional data; Magnitudes,
photographic
Keywords: galaxies: clusters: individual (Coma) -- galaxies: fundamental
parameters -- galaxies: photometry
Abstract:
A homogeneous photometry catalog is presented for 450 galaxies with
B25.5 ≤ 16 mag located in the 9.8 x 9.8 deg region centred on the
Coma Cluster. The catalog is based on photographic photometry using an
automated surface photometry software for data reduction applied to
B-band Schmidt plates. The catalog provides accurate positions,
isophotal and total magnitudes, major and minor axes, and a few other
photometric parameters including rudimentary morphology (early or late
type).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1 103 479 Catalog
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Num [1/450]+= Internal number [DFO95]
5-12 A8 --- CGCG Identification from CGCG VII/4A
13-18 A6 --- NGC_IC Identification from NGC/IC catalogs
19-24 A6 --- UGC Identification from UGC VII/26D
25-32 I8 km/s cz []? Redshift from CfA redshift survey
34-35 I2 h RAh *Right ascension (1950.0)
36-37 I2 min RAm R.A.
38-42 F5.2 s RAs R.A.
44 A1 --- DE- Declination sign, always blank
45-46 I2 deg DEd *Declination (1950.0)
47-48 I2 arcmin DEm Dec.
49-52 F4.1 arcsec DEs Dec.
54 A1 --- Blend *[AM] Deblending flag
55-60 F6.2 mag B25.5 *Isophotal magnitude B25.5.
61-66 F6.2 mag Bt *[]? Total magnitude Bt
67-72 F6.1 arcsec a *Semimajor axis at 25.5 mag/arcsec2
73-78 F6.1 arcsec b *Semiminor axis at 25.5 mag/arcsec2
79-82 I4 deg PA Position angle of major axis
83-88 F6.2 mag SB25.5 *Mean surface brightness
89-94 F6.3 --- cIndex Concentration index defined by Eq.2 in paper
95-99 F5.1 arcsec re25.5 *Effective radius
101 A1 --- Type *[ELU] E=early, L=late, U=unclassified
103 A1 --- Star *[*] Objects found to be blended stars
--------------------------------------------------------------------------------
Note on RAh, DEd:
Accuracy of equatorial coordinates are 0.6 arcsec (rms).
Note on Blend:
'A' and 'M' denote that these galaxies are deblended either
automatically or manually. Manual deblending was done, when topology
of the overlapping objects does not allow a unique solution, or when
blended images are so large or complex that the deblending procedure
requires too much computer memory. Photometric parameters may not
be accurate for galaxies with these flags.
Note on B25.5:
The mean error is estimated to be 0.1 mag.
Note on Bt:
The total magnitude is obtained by fitting the growth curve at the
three faintest isophotal levels (dividing the intensity range
between the peak and the threshold, 25.5 mag/s, into 20 levels) to
the fiducial growth curves expected for the de Vaucouleurs profile
(for E-type galaxies) and the exponential profile (for L-type
galaxies), and then by reading the magnitude at 5 times the
effective radius. For U-type galaxies, we average the two values
obtained from the two profiles. Note that the definition of this
total magnitude differs from that of BT (defined by RC2) commonly
used in the literature; the offset between the two total magnitudes
is found to be ∼0.03 mag (Bt is brighter). When a good fit is not
obtained for the three points, Bt is not listed.
Note on a, b:
Semimajor and semiminor axes at a surface brightness level of 25.5
mag/arcsec^2. 7-10% errors are expected for both parameters.
Note on SB25.5:
Mean surface brightness defined by equation (3) in the printed paper
with muL = 25.5 mag/arcsec^2.
Note on re25.5:
Effective radius that contains half the flux of B25.5.
Note on Type:
Morphology: 'E' (early, E-S0) or 'L' (late, Sa-Im), according to the
criterion discussed in section 2 of the printed paper. The
confidence level of the coincidence with RC3 morphology (early or
late) is 87.5%. 'U' denotes a galaxy which is unclassified.
Note on Star:
The objects are marked by asterisks when they are classified as
galaxies by the automated software, but turned out to be blended
stars ("double" stars) upon visual inspection.
--------------------------------------------------------------------------------
Origin: AAS CD-ROM series, Volume 4, 1995 Lee Brotzman [ADS] 08-May-95
Modifications at CDS:
The blank internal numbers in table1 (col. "Num") have been replaced
by the actual number.
(End) [CDS] 12-Jul-1995