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J/AJ/112/2500       JHK' photometry of 4 clusters of galaxies (McLean+ 1996)

Near infrared JHK photometry of intermediate redshift clusters McLean I.S., Teplitz H. <Astron. J. 112, 2500 (1996)> =1996AJ....112.2500M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Photometry, infrared Abstract: Deep near-infrared images of four intermediate redshift (z=0.2-0.4) clusters (Abell 370, Abell 963, CL 0024+1654 and CL 0909+4408) have been obtained in the J, H, and K bands using the UCLA Two-Channel IR Camera with a spatial resolution of ∼1". The 3'x3' field of view includes over 100 galaxies in each cluster. Photometry has been obtained with 1σ or limiting magnitudes of 21.7 at J, 21.0 at H, and 20.4 at K', and complete to 2 magnitudes fainter than L*. Data reduction techniques for flat-fielding object identification, and photometry of faint object crowded fields are discussed. The best method is the subtraction of a running-average sky made from object frames. The photometry is cross referenced to previous catalogs, and infrared color-magnitude diagrams are presented. Comparison of the IR colors of these four clusters to the predictions of the spectral synthesis models of Bruzual and Chariot is discussed. There is a discrepancy between the models and the observations of several tenths of a magnitude in the colors. Photometry has also been obtained for the gravitational lensing arcs in CL 0024+1654, which is consistent with an actively star-forming galaxy at z>1. For a description of the JHK' photometric system, see e.g. GCPD/09 Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 02 39.8 -01 35 Abell 370 = ClG 0237.3-0148 10 17.2 +39 02 Abell 963 = ClG 1014.2+3917 00 26 32.5 +17 09 43 ClG 0024+1654 09 52 57.1 +43 55 28 ClG 0909+4408 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3 45 134 JHK' photometry of Abell 370. table4 45 135 JHK' photometry of CL 0024+1654 table5 45 82 JHK' Photometry of Abell 963. table6 45 61 JHK' photometry of CL 0909+4408
Byte-by-byte Description of file: table3 table5
Bytes Format Units Label Explanations
1- 3 I3 --- No Object number in cluster 5- 7 I3 --- BO ? Butcher and Oemler (1978ApJ...219...18B) number 9- 15 F7.3 pix xpos x position (1) 17- 22 F6.2 pix ypos y position (1) 23 A1 --- n_ypos [a] Note (2) 25- 30 F6.3 mag Jmag J magnitude (1.2um) 31 A1 --- n_Jmag [a] Note (2) 33- 38 F6.3 mag Hmag ? H magnitude (1.65um) 40- 45 F6.3 mag K'mag K' magnitude (2.1um)
Note (1): 1 pix = 0.68". North is up, East is to the left Note (2): a : This object is poorly resolved from its neighbor
Byte-by-byte Description of file: table4 table6
Bytes Format Units Label Explanations
1- 3 I3 --- No Object number in cluster 5- 7 I3 --- DG ? Dressler and Gunn (1992, Cat. J/ApJS/78/1) number 9- 15 F7.3 pix xpos x position (1) 17- 22 F6.2 pix ypos y position (1) 23 A1 --- n_ypos [a] Note (2) 25- 30 F6.3 mag Jmag J magnitude (1.2um) 31 A1 --- n_Jmag [a] Note (2) 33- 38 F6.3 mag Hmag ? H magnitude (1.65um) 40- 45 F6.3 mag K'mag K' magnitude (2.1um)
Note (1): 1 pix = 0.68". North is up, East is to the left Note (2): a : This object is poorly resolved from its neighbor
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 30-Sep-1997
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

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