Recent developments of the ACS spectral extraction software aXe

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dc.creatorWalsh, J. R.
dc.creatorKuemmel, M.
dc.creatorLarsen, S. S.
dc.date2005-12-05
dc.date.accessioned2026-07-07T06:49:01Z
dc.date.available2026-07-07T06:49:01Z
dc.descriptionThe software package aXe provides comprehensive spectral extraction facilities for all the slitless modes of the ACS, covering the Wide Field Channel (WFC) grism, the High Resolution Channel (HRC) grism and prism and the Solar Blind Channel (SBC) prisms. The latest developments to the package apply to all ACS slitless modes leading to improved spectral extraction. Many thousands of spectra may be present on a single deep ACS WFC G800L image such that overlap of spectra is a significant nuisance. Two methods of estimating the contamination of any given spectrum by its near neighbours have been developed: one is based on the catalogue of objects on the direct image; another uses the flux information on multi-filter direct images. An improvement to the extracted spectra can also result from weighted extraction and the Horne optimal extraction algorithm has been implemented in aXe. A demonstrated improvement in signal-to-noise can be achieved. These new features are available in aXe-1.5 with the STSDAS 3.4 release.
dc.description6 pages, incl. 4 figures. To appear in the proceedings of the 2005 HST Calibration Workshop, STScI, 2005 (eds. A. Koekemoer, P. Goudfrooij and L. Dressel)
dc.identifierhttps://arxiv.org/abs/astro-ph/0512100
dc.identifierhttp://arxiv.org/abs/astro-ph/0512100
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104180
dc.subjectAstrophysics
dc.titleRecent developments of the ACS spectral extraction software aXe
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