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J/AJ/119/2571   UBVRI photometry of HDF QSOs and galaxies   (Vanden Berk+, 2000)

QSOs and absorption-line systems surrounding the Hubble Deep Field. Vanden Berk D.E., Stoughton C., Crotts A.P.S., Tytler D., Kirkman D. <Astron. J. 119, 2571 (2000)> =2000AJ....119.2571V
ADC_Keywords: QSOs ; Galaxies, photometry ; Photometry, UBVRI Keywords: large-scale structure of universe - quasars: absorption lines - quasars: general - surveys Abstract: We have imaged a 45'x45' area centered on the Hubble Deep Field (HDF) in UBVRI passbands, down to the limiting magnitudes of approximately 21.5, 22.5, 22.2, 22.2, and 21.2, respectively. The principal goals of the survey are to identify quasi-stellar objects (QSOs) and to map structure traced by luminous galaxies and QSO absorption line systems in a wide volume containing the HDF. The area surveyed is 400 times as large as that of the HDF, and 40 times as large as that of the HDF Flanking Fields. We have selected QSO candidates from color space and identified four QSOs and two narrow emission line galaxies not yet discovered, bringing the total number of known QSOs in the area to 19. Description: File phothdf.dat contains the J2000 coordinates, UBVRI magnitudes, and stellarity indices (based upon the program SExtractor) of objects detected in optical images of an approximatively 45x45 sq. arcmin. area surrounding the Hubble Deep Field. Observations were made with the McDonald 0.76m telescope and PFC camera. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 56 102 Unconfirmed UVX QSO candidates table4.dat 55 22 Unconfirmed high-z QSO candidates table5.dat 102 23 Spectroscopically confirmed QSOs and galaxies table6.dat 55 14 Spectroscopically identified stars phothdf.dat 107 10647 Photometry and stellarity of objects detected in at least one band
See also: J/AJ/112/359 : Galaxies in the Hubble Deep Field (van den Bergh+ 1996) J/ApJ/513/34 : HDF photometric redshifts catalog (Fernandez-Soto+, 1999) J/ApJS/127/1 : UGRK photometry in the Hubble Deep field region (Hogg+, 2000) Byte-by-byte Description of file: phothdf.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right ascension (J2000.0) 4- 5 I2 min RAm Right ascension (J2000.0) 7- 11 F5.2 s RAs Right ascension (J2000.0) 12 A1 --- DE- Declination sign (J2000) 13- 14 I2 deg DEd Declination (J2000.0) 16- 17 I2 arcmin DEm Declination (J2000.0) 19- 22 F4.1 arcsec DEs Declination (J2000.0) 24- 28 F5.2 mag Umag ?=99. U band magnitude (Johnson) 30- 33 F4.2 mag e_Umag ?=9.99 U band magnitude error 35- 39 F5.2 mag Bmag ?=99.99 B band magnitude (Johnson) 41- 44 F4.2 mag e_Bmag ?=9.99 B band magnitude error 46- 50 F5.2 mag Vmag ?=99.99 V band magnitude (Johnson) 52- 55 F4.2 mag e_Vmag ?=9.99 V band magnitude error 57- 61 F5.2 mag Rmag ?=99.99 R band magnitude (Kron-Cousins) 63- 66 F4.2 mag e_Rmag ?=9.99 R band magnitude error 68- 72 F5.2 mag Imag ?=99.99 I band magnitude (Kron-Cousins) 74- 77 F4.2 mag e_Imag ?=9.99 I band magnitude error 79- 82 F4.2 --- siU [0,1]?=9.99 U band stellarity index (1) 84- 87 F4.2 --- siB [0,1]?=9.99 B band stellarity index (1) 89- 92 F4.2 --- siV [0,1]?=9.99 V band stellarity index (1) 94- 97 F4.2 --- siR [0,1]?=9.99 R band stellarity index (1) 99-102 F4.2 --- siI [0,1]?=9.99 I band stellarity index (1) 104-107 F4.2 --- si [0,1]?=9.99 Average stellarity index (1)
Note (1): The "stellarity index" is produced by the SExtractor neural-network classifier (Bertin & Arnouts, 1996A&AS..117..393B). Each object detected in a co-added image was assigned a number between 0 and 1, which represents the confidence that an object is stellar.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 A1 --- Type [BF] B: Bright UVX Candidates, F: Faint UVX Candidates 3- 4 I2 h RAh Right ascension (J2000.0) (1) 6- 7 I2 min RAm Right ascension (J2000.0) 9- 13 F5.2 s RAs Right ascension (J2000.0) 15 A1 --- DE- Declination sign (J2000.0) 16- 17 I2 deg DEd Declination (J2000.0) 19- 20 I2 arcmin DEm Declination (J2000.0) 22- 25 F4.1 arcsec DEs Declination (J2000.0) 27- 31 F5.2 mag U-B ? U-B Bessel colour index 33- 37 F5.2 mag B-V ? B-V Bessel colour index 39- 43 F5.2 mag Bmag ? B Bessel magnitude 45- 49 F5.2 mag Rmag ? R Bessel magnitude 51- 55 F5.2 mag Imag ? I Bessel magnitude 56 A1 --- n_Imag [*] Note on Imag (2)
Note (1): Objects identified as [VSC2000] JHHMMSS.ss+DDMMSS.s in Simbad Note (2): For [VSC2000] J123451.33+622614.1, Imag=59.00 were suppressed
Byte-by-byte Description of file: table4.dat table6.dat
Bytes Format Units Label Explanations
1 A1 --- Type [BF] B: Bright high-z Candidates, F: Faint high-z Candidates 3- 4 I2 h RAh Right ascension (J2000.0) (1) 6- 7 I2 min RAm Right ascension (J2000.0) 9- 13 F5.2 s RAs Right ascension (J2000.0) 15 A1 --- DE- Declination sign (J2000.0) 16- 17 I2 deg DEd Declination (J2000.0) 19- 20 I2 arcmin DEm Declination (J2000.0) 22- 25 F4.1 arcsec DEs Declination (J2000.0) 27- 31 F5.2 mag Umag ? U Bessel magnitude 33- 37 F5.2 mag Bmag B Bessel magnitude 39- 43 F5.2 mag Vmag V Bessel magnitude 45- 49 F5.2 mag Rmag ?=99.00 R Bessel magnitude (2) 51- 55 F5.2 mag Imag ?=99.00 I Bessel magnitude (2)
Note (1): Objects identified as [VSC2000] JHHMMSS.ss+DDMMSS.s in Simbad Note (2): For [VSC2000] J123440.91+622934.6, the values of Rmag=69.00 and Imag=59.00 where transformed into 99.00
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Type QSO: quasar, Gal: galaxy 5- 16 A12 --- [VSC2000] Name based on J2000.0 coordinates 18- 19 I2 h RAh Right ascension (J2000.0) 21- 22 I2 min RAm Right ascension (J2000.0) 24- 28 F5.2 s RAs Right ascension (J2000.0) 30 A1 --- DE- Declination sign (J2000.0) 31- 32 I2 deg DEd Declination (J2000.0) 34- 35 I2 arcmin DEm Declination (J2000.0) 37- 40 F4.1 arcsec DEs Declination (J2000.0) 42- 46 F5.2 mag Umag ? U Bessel magnitude 48- 51 F4.2 mag e_Umag rms uncertainty on U mag 53- 57 F5.2 mag Bmag B Bessel magnitude 59- 62 F4.2 mag e_Bmag rms uncertainty on B mag 64- 68 F5.2 mag Vmag V Bessel magnitude 70- 73 F4.2 mag e_Vmag rms uncertainty on V mag 75- 79 F5.2 mag Rmag R Bessel magnitude 81- 84 F4.2 mag e_Rmag rms uncertainty on R mag 86- 90 F5.2 mag Imag I Bessel magnitude 92- 95 F4.2 mag e_Imag rms uncertainty on I mag 97-101 F5.3 --- zem Emission redshift 102 A1 --- n_zem [a] a: Spectroscopic identification and redshift from Liu et al., 1999AJ....118.1912L
History: Tables from electronic version; full photometry from Dan Vanden Berk Acknowledgements: Dan Vanden Berk
(End) James Marcout, Patricia Bauer [CDS] 05-Dec-2000
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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