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Improvements in the Residual OH Emission Removal in SINFONI Pipeline Spectra
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mogigliani, A. Davies, Richard Dumas, Christophe Neeser, Mark |
| Copyright Year | 2008 |
| Abstract | The strong and variable OH air-glow emission lines in the 1-2.5 μm spectra impose severe restrictions on the observing strategy. This is particularly true for instruments using Integral Field Spectroscopy techniques to sample the sky, as they are characterized by a narrow field of view. SINFONI is the Spectrograph for INtegral Field Observations in the Near Infrared (1.1-2.45 μm) at the ESO-VLT. SINFONI was developed and built by ESO and MPE in collaboration with NOVA. It is an integral field spectrograph which combines Near Infrared spectroscopy and adaptive optics in a field of view that is image sliced [1], [2]. It is mounted at Yepun, the fourth Unit Telescope (UT4) of the ESO-VLT and has been operational since April 1st, 2005. SINFONI operations are supported by a data reduction pipeline [3], as part of the Data Flow Operations [4]. The standard SINFONI observational strategy is to do a sequence of object-sky observations to sample the object and the sky at regular intervals. This observing technique is limited temporally by changes in the flux of the OH lines on time scales of 2-3 minutes, spectrally by variations in the flux among individual OH lines, and by instrument flexures which may result in spectral format shifts, which can lead to P-Cygni type residuals. These effects are indeed present in some spectra generated by early pipeline releases and triggered the development of an improved algorithm that can correct them. As part of a collaboration between ESO and MPE, we have implemented in the SINFONI pipeline an algorithm originally developed by the MPE to solve these problems. In this paper we present the first results of the new algorithm. |
| Starting Page | 443 |
| Ending Page | 446 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/978-3-540-76963-7_60 |
| Alternate Webpage(s) | http://www.eso.org/observing/dfo/quality/publ/ESOCAL_2007/cal07_modigliani.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/978-3-540-76963-7_60 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
