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J/A+A/507/671  Spectroscopy in cluster RDCS J1252.9-2927 (z=1.2) (Tanaka+, 2009)

Star formation activities of galaxies in the large-scale structures at z=1.2. Tanaka M., Lidman C., Bower R.G., Demarco R., Finoguenov A., Kodama T., Nakata F., Rosati P. <Astron. Astrophys., 507, 671-682 (2009)> =2009A&A...507..671T
ADC_Keywords: Clusters, galaxy ; Redshifts ; Galaxies, photometry Keywords: galaxies: evolution - galaxies: clusters: individual: RDCS J1252-29 - cosmology: large-scale structure of Universe Abstract: Recent wide-field imaging observations of the X-ray luminous cluster RDCS J1252.9-2927 at z=1.24 uncovered several galaxy groups that appear to be embedded in filamentary structure extending from the cluster core. We make a spectroscopic study of the galaxies in these groups using GMOS on Gemini-South and FORS2 on VLT with the aim of determining if these galaxies are physically associated to the cluster. We find that three groups contain galaxies at the cluster redshift and that they are probably bound to the cluster. This is the first confirmation of filamentary structure as traced by galaxy groups at z>1. We then use several spectral features in the FORS2 spectra to determine the star formation histories of group galaxies. Description: The GMOS observations were taken between January and March 2007 and were obtained with the R400 grating set to 7800Å and 7900Å to fill the detector gaps, and the G5325 order sorting filter. The FORS2 observations were taken between April and July 2008 and were obtained with the 300I grism and the OG590 order sorting filter. This setting covers the 6000-10000Å wavelength range. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 114 126 The GMOS and FORS2 spectroscopic catalog
Table1 : Field name and exposure times ------------------------------------------- Field ID Exposure time ------------------------------------------- GMOS-F1 14 x 30 min GMOS-F2 14 x 30 min GMOS-F3 6 x 30 min FORS2-F1 12 x 22 min FORS2-F2 8 x 22 min FORS2-F3 2 x 22 min Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Name, GMS-FN-NNA or FORS2-FN-NNA 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 24 F5.2 s RAs Right ascension (J2000) 26 A1 --- DE- Declination sign (J2000) 27- 28 I2 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 36 F4.1 arcsec DEs Declination (J2000) 38- 43 F6.4 --- z Redshift 45- 50 F6.4 --- E_z Error on Redshift (upper limit) (1) 52- 57 F6.4 --- e_z Error on Redshift (lower limit) (1) 59 I1 --- q_z [0/1] 0=secure redshift, 1=possible redshift 61- 65 F5.2 mag Vmag ?=- Total V magnitude (on AB system) (3) 67- 70 F4.2 mag e_Vmag ?=- rms uncertainty on Vmag 72- 76 F5.2 mag Rmag ?=- Total R magnitude (on AB system) (3) 78- 81 F4.2 mag e_Rmag ?=- rms uncertainty on Rmag 83- 87 F5.2 mag imag ?=- Total i magnitude (on AB system) (3) 89- 92 F4.2 mag e_imag ?=- rms uncertainty on imag 94- 98 F5.2 mag zmag ?=- Total z magnitude (on AB system) (3) 100-103 F4.2 mag e_zmag ?=- rms uncertainty on zmag 105-109 F5.2 mag Kmag ?=- Total K magnitude (on AB system) (3) 111-114 F4.2 mag e_Kmag ?=- rms uncertainty on Kmag
Note (1): The redshift error does not include wavelength calibration error which is typically 0.2Å. Note (3): The magnitudes of strongly blended objects are set to "---".
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Feb-2010
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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