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hst data reduction - Coggle Diagram
hst data reduction
HST file name
o8v502010_x1d.fits
Rootname: o8v502010
Suffix (also called as 'extension'): x1d, mean 1d spectrum
fits: data Format:
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Associations
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Only have single calibrated images file
the association product
suffix “drz” or "drc" for ACS and WFC3
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search MAST for observations involving associations of exposures,
your search will identify the final association product.
association table, stored in the file with suffix “asn”
HSTdata file
HST data calibration pipeline (HSTCAL) automatically processes and calibrates all the data received from HST
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MEF format
a list of Header Data Units (HDUs)
primary hdu, extension hdu
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For HST FITS files, the first
HDU contains no data
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HST Header Keyword Descriptions, see tab
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obtain data
Archive Overview
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data type
public, don;t need account to download data
eclussive data, need account previlege given by PI
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Archive-normal-product
High-Level Science Products (HLSPs)
some fully reduced dataset
other data have been pre-processed
with the best available reference files
from the Calibration Reference Data System
(CRDS; http://hst-crds.stsci.edu/)
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archive-enhance-product
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Hubble Source Catalog (HSC)
excellent astrometry (based on Gaia)
along with accurate multi-color
and multi-epoch photometry