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J/AJ/122/598        HDF-North serendipitously galaxies       (Dawson+, 2001)

Serendipitously detected galaxies in the Hubble Deep Field. Dawson S., Stern D., Bunker A.J., Spinrad H., Dey A. <Astron. J. 122, 598 (2001)> =2001AJ....122..598D
ADC_Keywords: Galaxies, photometry ; Redshifts Keywords: cosmology: observations - early universe - galaxies: distances and redshifts - galaxies: high-redshift Abstract: We present a catalog of 74 galaxies detected serendipitously during a campaign of spectroscopic observations of the Hubble Deep Field North (HDF) and its environs. Among the identified objects are five candidate Lyα emitters at z≳5, a galaxy cluster at z=0.85, and a Chandra source with a heretofore undetermined redshift of z=2.011. We report redshifts for 25 galaxies in the central HDF, 13 of which had no prior published spectroscopic redshift. Of the remaining 49 galaxies, 30 are located in the single-orbit HDF flanking fields. We discuss the redshift distribution of the serendipitous sample, which contains galaxies in the range 0.10<z<5.77 with a median redshift of z=0.85, and we present strong evidence for redshift clustering. By comparing our spectroscopic redshifts with optical/IR photometric studies of the HDF, we find that photometric redshifts are in most cases capable of producing reasonable predictions of galaxy redshifts. Finally, we estimate the line-of-sight velocity dispersion and the corresponding mass and expected X-ray luminosity of the galaxy cluster, we present strong arguments for interpreting the Chandra source as an obscured active galactic nucleus, and we discuss in detail the spectrum of one of the candidate z≳5 Lyα emitters. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 103 25 Serendipitously detected galaxies in central HDF table2.dat 103 49 Serendipitously detected galaxies outside central HDF notes.dat 100 21 Individual notes
See also: J/A+A/364/517 : HDF-N spiral and irregular galaxies (Rodighiero+, 2000) J/AJ/120/2206 : NTT, HDF-S and HDF-N photometric redshifts (Fontana+, 2000) J/ApJ/538/29 : HDF-N Caltech faint galaxy redshift survey. X. (Cohen+, 2000) J/AJ/121/2895 : HDF-N Caltech faint galaxy redshift survey. XIII. (Cohen 2001) J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001) Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- ID Identification number (1) 12 A1 --- n_ID Individual notes, detailed in "notes.dat" 13 A1 --- l_Imag Limit flag on Imag 14- 18 F5.2 mag Imag ? I814 magnitude from Williams et al. (1996, Cat. J/AJ/12/1335) 20- 21 I2 h RAh [12] Right ascension (J2000) 23- 24 I2 min RAm Right ascension (J2000) 26- 31 F6.3 s RAs Right ascension (J2000) 33 A1 --- DE- Declination sign (J2000) 34- 35 I2 deg DEd [62] Declination (J2000) 37- 38 I2 arcmin DEm Declination (J2000) 40- 44 F5.2 arcsec DEs Declination (J2000) 46- 50 F5.3 --- z Redshift 51 A1 --- u_z Uncertainty flag on z 53 I1 --- SC [1/5] Spectral categories (3) 55- 62 A8 ---- Refs References, separated by comma, table1 only (4) 64- 65 A2 --- Loc Location, table2 only (5) 67-103 A37 --- Com Comments (6)
Note (1): Identification numbers: Table 1: [WBD96] from Williams et al. (1996, Cat. J/AJ/112/1335) Table 2: [DSB2001], this paper Note (3): Spectral categories: 1: Multiple features 2: Solo line with continuum; assume [O II] λ3727 3: Solo line with continuum break; assume Lyα 4: Solo line with no continuum; assess imaging, if available 5: Continuum break; assess continuum strength blueward of break Note (4): References: list of spectroscopic redshifts already in the literature. The following abbreviations are used: C96 = Cohen et al. (1996, Cat. J/ApJ/471/L5) C00 = Cohen et al. (2000, Cat. J/ApJ/538/29) P97 = Phillips et al. (1997ApJ...489..543P) S96 = Steidel et al. (1996AJ....112..352S) Note (5): Indicated galaxy is located in one of the HDF flanking field observations (see Williams et al. 1996, Table 2): OW = outer west, OE = outer east IW = inner west, IE = inner east SW = south west, SE = south east NW = north west, NE = north east Note (6): The oxygen emission lines are abbreviated: [O II] = [O II] λ3727 [O III]a = [O III] λ4959 [O III]b = [O III] λ5007.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1 A1 --- Note Note number 4-100 A97 --- Text Text of the note
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 31-Jan-2002
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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