HDF Limiting Magnitude/Resolution Extension and Object Variability Search

Details HDF Limiting Magnitude/Resolution Extension and Object Variability Search HDF Limiting Magnitude/Resolution Extension and Object Variability Search

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7984g&link_type=abstract

HST Proposal ID #7984

Astronomy and Astrophysics

Astrophysics

Hst Proposal Id #7984 Extragalactic Astrophysics

Scientific paper

Further WFPC2 observations of the HDF were obtained 23-26 Dec. '97 as part of my Cycle 6 program: ``A Search for Supernovae at High Z in the HDF." Science particular to the SNe search will be funded from the GO-6473 grant; here I propose to: {1} Release deeper F814W and F300W images. F814W exposures over the non-bright portions of 18 orbits when added to the existing HDF set will boost total exposure time by 51 magnitude better by 0.23 mag, with other improvements this rises to 0.35 mag}, and F300W during bright time by 18 {2} Extend code {and release} development for a full dithered image set combination that does a better job of preserving clean point spread functions than the existing HDF {version two} working group release, with an additional minor gain in background noise level. This is important in particular for detection of faint point sources and for maintaining PSF stability necessary to allow resolution enhancement experiments through deconvolution. {3} Perform exploratory searches for object variability on time scales from 1 hour to 10 days in the existing HDF data. My approach to the data reductions is unique in maintaining an easy to analyze auxiliary set of single frames for variability studies.

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