The Phase I Proposal Roadmap
is a high level step-by-step guide to writing a Phase I Proposal. At each step, links are provided to relevant information.
The Cycle 21 Announcement Web page
contains links to information needed for preparing a HST
proposal. It also contains late-breaking updates regarding the Phase I process and a FAQ (frequently asked questions).
The Call for Proposals
discusses policies and procedures for submitting a Phase I proposal for HST
observing or Archival Research. It also provides a summary of the proposal process from proposal submission to execution of the observations. The Call for Proposals
document is available at the Cycle 21 Announcement Web page
Instrument handbooks, the primary source of information for HST
instruments, provide additional information beyond what’s presented in this Primer
. Please use current versions of the handbooks when preparing the Phase I proposal. The latest handbook versions, for active and decommissioned instruments, are available at the HST Documents Web page
. Other potentially useful documents, such as instrument science reports, data handbooks, and calibration conference proceedings are also accessible from that Web site.
The Astronomers Proposal Tool (APT) is the software interface for all Phase I and
Phase II proposal submissions for HST
. Please refer to the APT Web page
for information regarding the installation and use of APT.
The Aladin Sky Atlas
, available through APT, can be used to display HST
apertures on images of the sky. This software interface provides access to a wide variety of images and catalogs; note that the GALEX catalog is available to assist in checking for potentially dangerous objects for the UV detectors. Training documentation and videos can be found on the APT Training Materials Web page
Information in this Primer
, together with the instrument handbooks, provides the means for estimating acquisition times, exposure times, and other observational parameters. Values provided in document tables, or as illustrations, are only approximations; reliable calculations that take into account the complex telescope and instrument operation are best obtained using software tools provided by STScI, such as the Exposure Time Calculators (ETCs)
and APT (Section 1.3.5
). The ETCs, for example, provide warnings for target count rates that exceed saturation and safety limits. Note, however, that S/N predictions from the ETCs do not include the effects of degrading CTE (Charge Transfer Efficiency) for the CCD detectors.
Data Archive, a part of the Mikulski Archive for Space Telescopes (MAST)
at STScI, contains all the data taken by HST
. Observations from General Observer (GO) and Guaranteed Time Observer (GTO) programs are available to the community upon the expiration of their proprietary periods. Observations taken by Treasury programs (see Section 3.2.5 of the Call for Proposals
) and GO Pure Parallel programs (see Section 4.2.2 of the Call for Proposals
) carry no proprietary period.
The MAST Web page
provides an overview of the HST
Data Archive as well as the procedures for retrieving archival data. Section 7.2
contains additional information about the HST
Data Archive. A copy of the Archive that was maintained at the Space Telescope - European Coordinating Facility
(ST-ECF) in Garching ceased operations on 31 December 2010. The ESA Hubble Science Archive
is now available at the European Space Astronomy Centre (ESAC) in Spain. The Canadian Astronomy Data Centre
also maintains a copy of public HST
science data only, and is the preferred source for Canadian astronomers.
Duplication Checking Web tool is also available at MAST. More information on duplication checking can be found in Section 5.2.2 of the Call for Proposals
The Hubble Legacy Archive (HLA)
is a project designed to enhance science from Hubble Space Telescope data by augmenting the HST
Data Archive and providing advanced browsing capabilities. It is a joint project of the Space Telescope Science Institute, the Canadian Astronomy Data Centre (CADC), and, until December 2010, the European Coordinating Facility (ST-ECF). The HLA offers high level HST
products including composite images, as well as interactive tools for previewing data products. Section 7.3
contains more detailed information about the HLA.
Introduction to the HST Data Handbooks
is a general overview of HST data formats and software tools. It complements the instrument data handbooks that contain more details about calibration and data analysis. The latest versions of the instrument data handbooks are available at the Documents Web page
The Space Telescope Science Data Analysis Software (STSDAS) Web page
has links to the software used to calibrate and analyze HST
data, along with documentation on its use. See Section 7.1
for details. The DrizzlePac Handbook
provides information about the DrizzlePac software package that has replaced MultiDrizzle in pipeline calibration and post-pipeline processing. Some information about dither patterns, drizzling, and various observing considerations are included in it, but for more detailed information, please refer to the Phase II Proposal Instructions
and instrument handbooks