J/A+AS/124/283 BR magnitude and redshift of A1300 (Pierre+ 1997)
Spectroscopic and photometric study of the bright X-ray cluster A1300
Pierre M., Oukbir J., Dubreuil D., Soucail G., Sauvageot J.-L.,
Mellier Y.
<Astron. Astrophys. Suppl. Ser. 124, 283 (1997)>
=1997A&AS..124..283P 1997A&AS..124..283P (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Magnitudes ; Redshifts
Keywords: galaxies: clusters: individual: Abell 1300 - X-ray: galaxies -
galaxies: redshifts
Abstract:
We present the first results of an optical follow-up of X-ray bright
clusters of galaxies located between 0.15≤z≤0.31: B and R photometry
as well as medium resolution spectroscopy of the galaxies. The cluster
studied here - A1300 - is found to have a redshift of 0.3072 and a
velocity dispersion of 1210km/s, based on 52 cluster members.
Structures are observed in the galaxy number counts but the velocity
histogram shows no significant departure from a Gaussian
distribution.
Objects:
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RA (2000) DE Designation(s)
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11 32.0 -19 54 ACO 1300
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 29 480 Photometric analysis of A1300
table4 51 64 Spectroscopic analysis of A1300
tables.tex 90 656 LaTeX version of the tables
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 6 F6.1 pix xpos x distance from the field center (cD) (1)
8- 13 F6.1 pix ypos y distance from the field center (cD) (1)
15- 19 F5.2 mag Rmag R magnitude (average between 2 frames)
21- 24 F4.2 mag B-R B-R colour index (average between 4 frames)
26- 29 F4.2 --- Rmorph Morphological class in the R band (see text)
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Note (1): 1 pix = 0.314"
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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1- 3 I3 --- No Internal number referring to Fig.7, 8
4 A1 --- n_No [*n] Note on No (1)
6- 13 F8.4 deg RAdeg Right ascension (J2000) (2)
15- 22 F8.4 deg DEdeg Declination (J2000) (2)
24- 29 F6.4 --- z Redshift
31- 36 F6.4 --- e_z Error on the redshift
38 A1 --- q_z [1,2,9] z measurement quality (3)
40- 44 F5.2 mag Rmag ? R magnitude (only for galaxies within the
area processed for photometry)
46- 49 F4.2 mag B-R ? B-R colour index
51 A1 --- Member [YN] Cluster member galaxy (3sigma clipping
method)
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Note (1): *: Presence of emission lines:
101: H_α
103: H_α
115: [OII] at 3727, H_β, [OIII] at 4959 and 5007,
OI at 6300 and 6364, H_α, NII at 6549 and 6583,
SII at 6717 and 6734
205: H_α, H_β?
225: OI at 6300 and 6364
320: H_α?
321: H_α? SII at 6717
n: The two nuclei of the cD galaxy correspond to numbers 121 & 219
and show totally similar redshifts at the present spectroscopic
resolution.
Note (2): Galaxy positions were interactively measured on the STScI digitized
blue sky survey images having a pixel size of 1.7", and should have
an accuracy of ∼3.4"
Note (3): 1: highest peak in the correlation function,
2: 2nd peak,
9: interactive measurement with lines
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Acknowledgements: Marguerite Pierre
(End) Patricia Bauer [CDS] 24-Jan-1997