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Дата изменения: Sun Feb 15 03:48:30 1998
Дата индексирования: Sun Dec 23 22:11:34 2007
Кодировка:
Поисковые слова: hubble deep field


KPNO IRIM Observations of the <b style="color:black;background-color:#ffff66">Hubble</b> <b style="color:black;background-color:#66ffff">Deep</b> <b style="color:black;background-color:#ff66ff">Field</b>




KPNO IRIM Observations of the Hubble Deep Field




Ten nights of time (UT 27 April - 6 May 1996) on the
KPNO Mayall 4m Telescope
have been used to image the Hubble Deep Field in the near infrared.
The IRIM
camera employs a 256 x 256 Rockwell NICMOS-3 HgCdTe array, with a
scale of approximately 0".6/pixel at the 4m f/15 Cassegrain focus.
This provides a field of view approximately 2.5 arcmin on a side,
well matched to that of the WFPC2.



Uncannily, the weather remained clear throughout the run. A small amount
of time was lost one night due to telescope closure for smoke from the
forest fires happening elsewhere in Arizona. Some cirrus was present
during the first three nights, but thereafter conditions were largely
photometric. Warm weather resulted in a relatively bright K-band
background.



Altogether, 22.9 hours of data were collected in the K-band, along with
11.0 hours at J and 11.3 hours at H. Net image quality in the combined
images produced on-line at the telescope is 1.0 arcsec FWHM.



In addition, about half the flanking field area was covered with 24 minute
K-band exposures. Fields to the east and north of the central HDF were
observed.



Data reduction and calibration are currently underway.





Some pictures:






Distribution plans



We plan to distribute the reduced infrared images and photometric catalogs
of the HDF within four months of the completion of the observations.
Watch this space and the

STScI HDF Clearinghouse web page for further information.





Investigators





Return to the
STScI HDF home page.



Mark Dickinson: med@stsci.edu 5/13/96