J/MNRAS/318/703 H-alpha in Abell 2390 (Balogh+ 2000)
H-alpha photometry of Abell 2390
Balogh M.L., Morris S.L.
<Mon. Not. R. Astron. Soc. 318, 703 (2000)>
=2000MNRAS.318..703B 2000MNRAS.318..703B
ADC_Keywords: Clusters, galaxy; Photometry, H-alpha
Keywords: galaxies: clusters: Abell 2390 - galaxies : evolution
Description:
Photometry is tabulated for 1189 galaxies in 19 OSIS-V (CFHT) images
in the direction of the galaxy cluster Abell 2390. The images cover
270 sq. deg., and extend out to the virial radius of the cluster.
Three narrow filters are used to determine the flux above the
continuum between wavelengths 7897 and 8245 Å, corresponding to
H-alpha at 0.2033<z<0.2563. The absolute flux values are uncertain by
about 30% due to zero point uncertainty; we also tabulate the
equivalent width which is independent of this zero point. Only strong
emission line cluster members (equivalent width greater than about
50Å) are detectable, by design. Galaxies with spectra available
from the CNOC survey (Abraham=1996ApJ...471..694A 1996ApJ...471..694A) are identified.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 116 1189 H-alpha Catalogue
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Name Name of field used for the photometry
5- 10 F6.1 pix Xpos X coordinate on CCD
12- 17 F6.1 pix Ypos Y coordinate on CCD
19- 27 F9.5 deg RAdeg Right ascension J2000
29- 36 F8.5 deg DEdeg Declination J2000
38- 44 F7.1 arcsec dRA J2000 R.A. difference from BCG (1)
46- 51 F6.1 arcsec dDE J2000 Dec. difference from BCG (1)
53- 58 F6.3 mag rmag Gunn R magnitude
60- 64 F5.3 mag e_rmag Uncertainty in R
66- 71 F6.3 mag Rcorr Corrected R magnitude (2)
73- 79 F7.4 Jy flux H-alpha flux (3)
81- 86 F6.4 Jy e_flux Uncertainty in flux
88- 93 F6.1 0.1nm EW H-alpha equivalent width (3)
95- 98 F4.1 0.1nm e_EW Uncertainty in EW
100 I1 --- flag [0,3] SExtractor Photometry flag (4)
102-105 F4.2 mag Wcor Incompleteness magnitude correction
107-112 I6 --- ppp ? Galaxy number in Abraham
=1996ApJ...471..694A 1996ApJ...471..694A
114-116 A3 --- CM ? Cluster membership
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Note (1):
BCG position is 21:53:36.8, +17:41:43.8 (J2000)
Note (2):
Zero point corrected by bootstrapping to CNOC photometry
(=1996ApJ...471..694A 1996ApJ...471..694A)
Note (3):
Flux and equivalent width only correspond to Halpha for
galaxies with redshifts between 0.2033 and 0.2563.
Note (4): the SEXTACTOR photometry flag indicates the presence
of bright neighbours (1), a deblended object (2), both (3)
or neither (0).
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References:
Abraham R. G., Smecker-Hane T. A., Hutchings J. B.,
Carlberg R. G., Yee H. K. C., Erica E., Morris S. L.,
Oke J. B., Rigler M. 1996, ApJ 471, 694 =1996ApJ...471..694A 1996ApJ...471..694A
(End) M.L. Balogh [Durham], Gail L. Schneider [SSDOO/ADC] 25-Oct-2000