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Subject: flanks.txt for posting with KPNO flanking fields on WWW (handout text)
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            Hubble Deep Field Flanking Fields - Basic Information

Eight flanking fields were done around the Hubble Deep Field, primarily in
order to provide ground-based spectroscopists with targets for long-slit
spectroscopic observing, and with an eye to the future as preparation for
possible new observations with next-generation HST instruments as well.

Here are the HDF flanking field positions, extracted from the RPS2 observing 
file as submitted. The telescope's actual pointings should have been very 
close to these. Note that these coordinates are all referenced to the WFPC2
WFALL-FIX aperture position which is on the WF3 chip and 10" off from the apex 
of the WFPC2 pyramid in both x and y, which means it is on the WF3 ( middle 
WFC chip ) at a position ~14" from the pyramid at ~45 degrees on the diagonal 
between chip boundaries. ( The apertures are all defined in the HST Phase II 
Proposal Instructions complete with illustrations if you want to see more
about this. ) We also tried to set up the flanking fields so that there was 
about a 4" overlap between all adjoining fields in the extended mosaic of 
flanking fields. We did NOT try to make minute adjustments to the ORIENT wrt 
North to keep CCD columns and rows aligned across the flanking fields mosaic, 
however, as it was deemed by the working group to be a very small effect and 
inconsequential for our purposes. All were done at the SAME ORIENT which was
U3=292 degrees, which corresponds to the PA_V3=112 in the data headers since
U3 and V3 are 180 degrees apart.

In the KPNO image with the overlay on the reverse side, the PC chip of each 
field is marked with the total number of orbits allocated to observing that
field. The central "Deep" field is evident by the 150 orbits marked on its
PC chip. Also shown is the scale of the image, denoted by the 150" marker on
the left side, corresponding to the length of two WFPC2 WFC chips side-by-side,
adjusted for the overlap between adjacent chips.

Again, the coordinates listed here below are for the WFPC2 WFALL-FIX position.

Fixed Target List
Target Field name    Alternate name in RPS2 Fixed Target List
-----------------    ----------------------------------------
HDF-123635+621339    HDF-FLANK-STRIP-INNER-WEST      ( 2 Orbits - 4 Exposures )
RA=12H 36M 35.17S +/- 0.01S,  DEC=+62D 13' 38.7" +/- 0.1",  Equinox:  J2000


HDF-123621+621419    HDF-FLANK-STRIP-OUTER-WEST      ( 1 Orbit  - 3 Exposures )
RA=12H 36M 20.93S +/- 0.01S,  DEC=+62D 14' 19.3" +/- 0.1",  Equinox:  J2000


HDF-123704+621217    HDF-FLANK-STRIP-INNER-EAST      ( 2 Orbits - 4 Exposures )
RA=12H 37M 03.62S +/- 0.01S,  DEC=+62D 12' 17.2" +/- 0.1",  Equinox:  J2000


HDF-123718+621136    HDF-FLANK-STRIP-OUTER-EAST      ( 1 Orbit  - 3 Exposures )
RA=12H 37M 17.83S +/- 0.01S,  DEC=+62D 11' 36.3" +/- 0.1",  Equinox:  J2000


HDF-123651+621548    HDF-FLANK-NORTHWEST             ( 1 Orbit  - 3 Exposures )
RA=12H 36M 51.03S +/- 0.01S,  DEC=+62D 15' 47.6" +/- 0.1",  Equinox:  J2000


HDF-123705+621507    HDF-FLANK-NORTHEAST             ( 1 Orbit  - 3 Exposures )
RA=12H 37M 05.27S +/- 0.01S,  DEC=+62D 15' 06.8" +/- 0.1",  Equinox:  J2000


HDF-123648+621008    HDF-FLANK-SOUTHEAST             ( 1 Orbit  - 3 Exposures )
RA=12H 36M 47.77S +/- 0.01S,  DEC=+62D 10' 08.4" +/- 0.1",  Equinox:  J2000


HDF-123634+621049    HDF-FLANK-SOUTHWEST             ( 1 Orbit  - 3 Exposures )
RA=12H 36M 33.56S +/- 0.01S,  DEC=+62D 10' 49.1" +/- 0.1",  Equinox:  J2000