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J/AJ/127/3137       Hawaii redshifts in the ACS-GOODS region     (Cowie+, 2004)

A large sample of spectroscopic redshifts in the ACS-GOODS region of the Hubble Deep Field North. Cowie L.L., Barger A.J., Hu E.M., Capak P., Songaila A. <Astron. J., 127, 3137-3145 (2004)> =2004AJ....127.3137C
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, UBVRI ; Redshifts Keywords: cosmology: observations - early universe - galaxies: distances and redshifts - galaxies: evolution - galaxies: formation Abstract: We report the results of an extensive spectroscopic survey of galaxies in the roughly 160 arcmin2 ACS-GOODS region surrounding the Hubble Deep Field North (HDF-N). We have identified 892 galaxies or stars with z<24, R<24.5, or B<25 in the region. The spectra were obtained with either the DEIMOS or LRIS spectrographs on the Keck 10m telescopes. The results are compared with photometric redshift estimates and with redshifts from the literature, as well as with the redshifts of a parallel effort led by a group at Keck. Our sample, when combined with the literature data, provides identifications for 1324 sources. We use our results to determine the redshift distributions with magnitude, to analyze the rest-frame color distributions with redshift and spectral type, and to investigate the dependence of the X-ray galaxy properties on the local galaxy density in the redshift interval z=0-1.5. We find the rather surprising result that the galaxy X-ray properties are not strongly dependent on the local galaxy density for galaxies in the same luminosity range. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 45 1181 Hawaii redshifts in the ACS-GOODS region table2.dat 81 1324 Spectroscopic redshifts from the Hawaii sample and the literature table3.dat 136 5737 Team Keck Treasury Redshift Survey (TKRS) Catalog refs.dat 143 19 References
See also: II/261 : GOODS: Initial Results (Giavalisco+, 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 12- 19 F8.5 deg DEdeg Declination in decimal degrees (J2000) 21- 24 F4.1 mag z'mag ? The z' band AB magnitude 26- 29 F4.1 mag Rmag ? The R band AB magnitude 31- 35 F5.1 mag Bmag The B band AB magnitude (1) 37- 41 F5.3 --- z ? Spectroscopic redshift 43 A1 --- f_z [os] Flag on z (2)
Note (1): Magnitudes which correspond to a negative flux are shown with a negative sign in front of them. Note (2): Note on redshift: o = observed but could not be identified s = star
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 12- 19 F8.5 deg DEdeg Declination in decimal degrees (J2000) 21- 25 F5.1 mag HK'mag ? HK' AB magnitude (covers H and K' bands) (1) 27- 30 F4.1 mag z'mag ? The z' band AB magnitude (1) 32- 35 F4.1 mag Imag The I band AB magnitude (1) 37- 40 F4.1 mag Rmag ? The R band AB magnitude (1) 42- 46 F5.1 mag Vmag The V band AB magnitude (1) 48- 52 F5.1 mag Bmag The B band AB magnitude (1) 54- 58 F5.1 mag Umag The U band AB magnitude (1) 60- 65 F6.4 --- zspec ? Spectroscopic redshift 67 A1 --- f_zspec [s] Indicates object is a star 69 I1 --- r_zspec Source for zspec (2) 71- 74 A4 --- zphot ? Photometric redshift from Capak et al. (2004, in prep.) 76 A1 --- f_zphot [s] Indicates object is a star 78- 81 F4.2 --- Odds [0/1]? Odds that the redshift lies close to the estimated value (3)
Note (1): From Capak et al. (2004, Cat. J/AJ/127/180) Note (2): Source for zspec take the following values: 0 = DEIMOS redshift from the present paper 1 = LRIS redshift from the present paper 2 = Cal Tech redshift from Cohen et al. (1996, Cat. J/ApJ/471/L5, 2000, Cat. J/ApJ/538/29) or Cohen (2001, Cat. J/AJ/121/2895) 3 = Lick redshift from Phillips et al. (1997ApJ...489..543P) or Lownethal et al. (1997ApJ...481..673L) 4 = redshift from Dawson et al. (2001, Cat. J/AJ/122/598) 5 = redshift from Steidel et al. (1996AJ....112..352S, 2003, Cat. J/ApJ/592/728) 6 = redshift from Lowental et al. (1998, ASP Conf. Ser. 146, 110), Liu et al. (1999AJ....118.1912L) or Dickinson (1998, in The Hubble Deep Field, ed. M. Livio, S.M. Fall, & P. Madau (New York: Cambridge Univ. Press), 219) Note (3): We next compared the "total" sample of redshifts (from the Hawaii observations and the literature) with the photometric redshift catalog of Capak et al. (2004, in prep.). The photometric redshift estimates are based on ultradeep imaging in seven colors from U to HK' (Capak et al., 2004, J/AJ/127/180) and were computed using the Bayesian code of Benitez (2000ApJ...536..571B). This code assigns odds that the redshift lies close to the estimated value. We only use those cases in which the odds lie above 90%.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 I5 --- TKRS Serial number in Team Keck Survey, 7- 8 I2 h RAh DEIMOS Hour of Right Ascension (J2000) 10- 11 I2 min RAm DEIMOS Minute of Right Ascension (J2000) 13- 18 F6.3 s RAs DEIMOS Second of Right Ascension (J2000) 19 A1 --- DE- DEIMOS Sign of Declination (J2000) 20- 21 I2 deg DEd DEIMOS Degree of Declination (J2000) 23- 24 I2 arcmin DEm DEIMOS Arcminute of Declination (J2000) 26- 30 F5.2 arcsec DEs DEIMOS Arcsecond of Declination (J2000) 32- 36 F5.2 mag Rmag DEIMOS R band magnitude in AB system 38- 39 I2 --- Mask ? Mask number on which object was placed 41- 43 I3 --- Slit ? Slit number for object on TKRS mask 46- 53 F8.5 --- z ? Topocentric redshift measured by TKRS 55- 56 I2 --- q_z ? Redshift code assigned by TKRS (1) 58- 63 F6.4 --- zOther ? Alternate redshift from other works 65- 66 I2 --- r_zOther ? Source of alternate redshift, in refs.dat 68- 73 F6.1 pix XpixD X position on the DEIMOS mosaic image 75- 80 F6.1 pix YpixD Y position on the DEIMOS mosaic image 82- 83 I2 --- ACS Sector number in which the object lies on the HST/ACS mosaic image (3) 85- 90 F6.1 pix XpixG X position on the HST/ACS mosaic image 92- 97 F6.1 pix YpixG Y position on the HST/ACS mosaic image 99-103 F5.3 arcsec MajAxis DEIMOS semi-major axis (4) 105-109 F5.3 --- ell DEIMOS ellipticity (4) 111-115 F5.1 deg PA [-180/180] DEIMOS major axis position angle (5) 117-136 A20 --- G-ID GOODS-N v1.0 catalog IAU identification (6)
Note (1): Redshift code assigned by TKRS (Cat. J/AJ/127/3121) as follows: -1 = star 1 = redshift unmeasurable 2 = redshift uncertain 3 = 90% confidence 4 = 99% confidence Note (3): As shown in the figure made by the GOODS team at ftp://archive.stsci.edu/pub/hlsp/goods/v1/h_hdfn_v1.0sects_plt.jpg Note (4): Measured by SExtractor on DEIMOS mosaic image. Note (5): Measured by SExtractor on DEIMOS mosaic image (North=0, East=+90). Note (6): Of objects matching the DEIMOS catalogue from Giavalisco et al. (2004ApJ...600L..93G).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 22 A19 ---- BibCode BibCode 24- 39 A16 --- Aut Author's name 43-143 A101 --- Com Comments
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Dec-2004
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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