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J/A+A/468/807 Redshifts of galaxies associated with X emission (Mannucci+, 2007)

A galaxy overdensity at z=0.401 associated with an X-ray emitting structure of warm-hot intergalactic medium. Mannucci F., Bonnoli G., Maiolino R., Zappacosta L., Pedani M. <Astron. Astrophys. 468, 807 (2007)> =2007A&A...468..807M
ADC_Keywords: Galaxies, photometry ; X-ray sources ; Redshifts Keywords: galaxies: intergalactic medium - galaxies: distances and redshifts - X-rays: diffuse background Abstract: We present the results of spectroscopic observations of galaxies associated with the diffuse X-ray emitting structure discovered by Zappacosta et al. (2002A&A...394....7Z). After measuring the redshifts of 161 galaxies, we confirm an overdensity of galaxies with projected dimensions of at least 2Mpc, determine its spectroscopic redshift in z=0.401±0.002, and show that it is spatially coincident with the diffuse X-ray emission. This confirms the original claim that this X-ray emission has an extragalactic nature and is due to the warm-hot intergalactic medium (WHIM). We used this value of the redshift to compute the temperature of the emitting gas. The resulting value depends on the metallicity that is assumed for the IGM, and is constrained to be between 0.3 and 0.6keV for metallicities between 0.05 and 0.3solar, in good agreement with the expectations from the WHIM. Description: List of the target galaxies observed with the WHT/AF2/WYFOOS and TNG/DOLORES multi-object spectrographs. For each galaxy, the coordinates, the R-band magnitude, the spectroscopic redshift and the spectral classification are given. Target galaxies have been selected to have R-band magnitudes between 20.0 and 21.5. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 57 269 Target list and spectroscopic redshift
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 I5 d Seq Sequential number 8- 9 I2 h RAh Right ascension (J2000) 11- 12 I2 min RAm Right ascension (J2000) 14- 18 F5.2 s RAs Right ascension (J2000) 21 A1 --- DE- Declination sign (J2000) 22- 23 I2 deg DEd Declination (J2000) 25- 26 I2 arcmin DEm Declination (J2000) 28- 32 F5.2 arcsec DEs Declination (J2000) 35- 38 F4.1 mag Rmag R-band magnitude (Vega system) 41- 43 A3 --- Tel [WHT TNG] Telescope (1) 46- 51 F6.4 --- z ? Spectroscopic redshift 54 I1 --- q_z [1/4]? Redshift quality flag (2) 57 A1 --- Class [EMLUQS] Spectral classification (3)
Note (1): Telescope as follows: WHT = Whilliam Hershel Telescope, AF2/WYFFOS TNG = Telescopio Nazionale Galileo, DOLORES Note (2): Redshift quality flag as follows: 1 = certain 2 = reliable 3 = uncertain 4 = tentative Note (3): Spectral classification as follows: E = Early type galaxy M = intermediate type galaxy L = late type galaxy U = unclassified Q = QSO S = Galactic star
Acknowledgements: Filippo Mannucci, filippo(at)
(End) Filippo Mannucci [INAF-IRA], Patricia Vannier [CDS] 10-Apr-2007
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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