Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-12-05
Astronomy and Astrophysics
Astrophysics
10 pages, incl. 8 figures. To appear in the proceedings of the 2005 HST Calibration Workshop, STScI, 2005 (eds. A. Koekemoer,
Scientific paper
The Advanced Camera for Surveys (ACS) enables low resolution slitless spectroscopic imaging in the three channels. The most-used modes are grism imaging with the WFC and the HRC at a resolution of 40 and 24 A/pixel, respectively. In the far UV there are two prisms for the SBC and a prism for the HRC in the near-UV. An overview of the slitless spectroscopic modes of the ACS is presented together with the advantages of slitless spectroscopy from space. The methods and strategies developed to establish and maintain the wavelength and flux calibration for the different channels are outlined. Since many slitless spectra are recorded on one deep exposure, pipeline science quality extraction of spectra is a necessity. To reduce ACS slitless data, the aXe spectral extraction software has been developed at the ST-ECF. aXe was designed to extract large numbers of ACS slitless spectra in an unsupervised way based on an input catalogue derived from a companion direct image. In order to handle dithered slitless spectra, drizzle, well-known in the imaging domain, has been applied. For ACS grism images, the aXedrizzle technique resamples 2D spectra from individual images to deep, rectified images before extracting the 1D spectra. aXe also provides tools for visual assessment of the extracted spectra and examples are presented.
Kuemmel Martin
Larsen Soeren S.
Walsh Jonathan R.
No associations
LandOfFree
Slitless spectroscopy with the Advanced Camera for Surveys does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Slitless spectroscopy with the Advanced Camera for Surveys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slitless spectroscopy with the Advanced Camera for Surveys will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-86395