J/AJ/112/1335 Hubble Deep Field observations (Williams+ 1996)
The Hubble Deep Field observations, data reduction, and galaxy photometry.
Williams R.E., Blacker B., Dickinson M., van Dyke Dixon W.,
Ferguson H.C., Fruchter A.S., Giavalisco M., Gilliland R.L.,
Heyer I., Katsanis R., Levay Z., Lucas R.A., McElroy D.B., Petro L.,
Postman M., Adorf H.-M., Hook R.N.
<Astron. J. 112, 1335 (1996)>
=1996AJ....112.1335W 1996AJ....112.1335W
ADC_Keywords: Galaxies, photometry
Mission_Name: HST
Abstract:
The Hubble Deep Field (HDF) is a Director's Discretionary program on
HST in Cycle 5 to image an undistinguished field at high Galactic
latitude in four passbands as deeply as reasonably possible. These
images provide the most detailed view to date of distant field
galaxies and are likely to be important for a wide range of studies in
galaxy evolution and cosmology. In order to optimize observing in the
time available, a field in the northern continuous viewing zone was
selected and images were taken for ten consecutive days, or
approximately 150 orbits. Shorter 1-2 orbit images were obtained of
the fields immediately adjacent to the primary HDF in order to
facilitate spectroscopic follow-up by ground- based telescopes. The
observations were made from 1995 December 18-30, and both raw and
reduced data have been put in the public domain as a community
service. We present a summary of the criteria for selecting the field,
the rationale behind the filter selection and observing times in each
band, and the strategies for planning the observations to maximize the
exposure time while avoiding Earth-scattered light. Data reduction
procedures are outlined, and images of the combined frames in each
band are presented. Objects detected in these images are listed in a
catalog with their basic photometric parameters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 124 3509 Hubble Deep Field source catalog
table7.ps 72 10734 PostScript version of table7
tables.fit 2880 78 FITS tables of the complete set of parameters
for each galaxy
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See also:
J/AJ/112/359 : Galaxies in the Hubble Deep Field (van den Bergh+ 1996)
J/ApJ/453/48 : VI photometry of HST faint field galaxies (Driver+ 1995)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- [WBD96] Identification number
17- 22 F6.1 pix Xpos X position (1)
24- 29 F6.1 pix Ypos Y position (1)
31- 32 I2 h RAh [12] Right ascension (J2000)
34- 35 I2 min RAm Right ascension (J2000)
37- 42 F6.3 s RAs Right ascension (J2000)
44 A1 --- DE- [+] Declination sign
45- 46 I2 deg DEd [62] Declination (J2000)
48- 49 I2 arcmin DEm Declination (J2000)
51- 55 F5.2 arcsec DEs Declination (J2000)
57 A1 --- l_mt Limit flag on mt
58- 62 F5.2 mag mt Total magnitude
64 A1 --- l_mi Limit flag on mi
65- 69 F5.2 mag mi Isophotal magnitude
71 A1 --- l_U-B Limit flag on U-B
72- 76 F5.2 mag U-B ? U-B colour index
78 A1 --- l_B-V Limit flag on B-V
79- 83 F5.2 mag B-V ? B-V colour index
85 A1 --- l_V-I Limit flag on V-I
86- 90 F5.2 mag V-I ? V-I colour index
92- 98 F7.2 --- S/N ? Signal-to-noise ratio
101-105 F5.2 arcsec2 area Area
108-111 F4.2 arcsec r1 Unweighted first moment radius
113-116 F4.2 --- b/a Ellipticity
118-120 I3 deg PA Position angle
122-124 A3 --- Flag Flags
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Note (1): 1 pix = 0.1 arcsec; x increasing from left to right,
y increasing from low to top
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Acknowledgements: Copied on 27-Nov-1996 via FTP from
http://www.stsci.edu/ftp/observer/hdf/archive/v2catalog
(End) Francois Ochsenbein [CDS] 27-Nov-1996