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J/A+A/482/561  High spatial resolution observations of pi1 Gru (Sacuto+, 2008)

The close circumstellar environment of the semi-regular S-type star pi1 Gruis. Sacuto S., Jorissen A., Cruzalebes P., Chesneau O., Ohnaka K., Quirrenbach A., Lopez B. <Astron. Astrophys. 482, 561 (2008)> =2008A&A...482..561S
ADC_Keywords: Interferometry ; Stars, variable Keywords: techniques: interferometric - techniques: high angular resolution - stars: AGB and post-AGB - stars: circumstellar matter - stars: mass-loss Abstract: We present high spatial resolution observations of the close circumstellar environment of the semi-regular S-type star pi1 Gruis obtained with the Very Large Telescope Interferometer (VLTI) of ESO's Paranal Observatory and MIDI, the MID-infrared Interferometric recombiner. MIDI combines the light of two telescopes and provides spectrally resolved visibilities in the N band atmospheric window. The observations of pi1 Gruis were conducted with the VLT Auxiliary Telescopes (ATs) A0, E0, D0 and G0, providing projected baselines in the range of 15 to 64 meters oriented from PA=41 to 102°. The ATs observations were made during the nights of May 21-23-24-25-27 2006, June 19 2006, and August 08 2006. All the observations were made under good atmospheric conditions (average seeing ∼0.94") with the worst seeing (∼1.51") during the night of May 27 2006. The files includes all visibility and differential phase data recorded from these observations as well as all the characteristics concerning the observations. The log of the observations is shown in Table 1. Description: All the data products are stored in the FITS-based, optical interferometry data exchange format (OI-FITS), described in Pauls et al. (2005PASP..117.1255P). The OI Exchange Format is a standard for exchanging calibrated data from optical (visible/infrared) stellar interferometers. The standard is based on the Flexible Image Transport System (FITS), and supports storage of the optical interferometric observables including visibilities and differential phases. Several routines to read and write this format in various languages can be found in: Webpage Objects: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 22 22 44.21 -45 56 52.6 pi1 Gru = HD 212087 22 42 40.05 -46 53 04.5 Beta Gru = HD 214952 ------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 50 14 Journal of the VLTI/MIDI observations of pi1 Gru fig/* 0 7 Spectrally-dispersed visibilities and differential phases + detailed headers
See also: J/A+A/465/469 : High spatial resolution observations of HM Sge (Sacuto+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Star name 11- 20 A10 "YYYY-MM-DD" Obs.Date Observation date 22- 29 A8 --- Obs.Time Observation time (hh:mm:ss) 31- 34 F4.1 m Base ?=- Base 36- 38 I3 deg PA ?=- Position angle 40- 50 A11 --- FileName Corresponding fits file, in subdirectory fig
Acknowledgements: Stephane Sacuto, stephane.sacuto(at), Walter Jaffe and Rainer Kohler References: Jaffe et al., 2004SPIE.5491..715J Pauls et al., 2005PASP..117.1255P
(End) Patricia Vannier [CDS] 04-Feb-2008
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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