SPECTROGRAPHY AT PIC DU MIDI
18 July - 24 July 2005
60 CM TELESCOPE
LHIRES3 SPECTROGRAPH
LISA SPECTROGRAPH

The LHIRES3 spectrograph at the Newton focus of 24-inch telescope. See Association T60.

The team at the beginning of the mission. Christian Buil, Valérie Desnoux, André Rondi, Robert Delmas.

Multi-lines temporal monitoring of Beta Lyrae
See also the simultaneaous missions "Beta Lyrae" of CALA
and "Beta Lyrae" of SAR
Saint-Veran observatory (Musicos spectrograph)

At first plane, the one-meter telescope dome of Pic du Midi.

Journal of the observations

Notes::
The each observation the date of mid-exposure is given (in UT), the heliocentric Julien Day, the exposure time in seconds, the heliocentric velocity correction of Earth in km/s,  the heliocentric wavelength correction in angstroms (the latter correction is not applied to the spectra, see below).
Click on the links for download ASCII file of a given spectrum (first column, the wavelength in Angstroms, second column, the relative signal).
The spectra are spectrally calibrated, but the heliocentric correction are not applied (the wavelength are topocentric).
The continuum is normalized to unity after instrumental responsivity correction.
The geographic coordinates of Pic du Midi observatory are La=0.142E, Lo=+42.937, H=2760 m.
The geographic coordinates of Castanet observatory are La=1.508E, Lo=+43.517, H=190 m. 

Halpha region. Comparison of different spectra acquired.
For clarity reason the spectra shifted along the intensities axis
(the value of the constant added to the spectrum plot is by step of 0.6).
Click on the plot for enlarge.
 
HeI l5876 A region. Comparison of different spectra acquired.
For clarity reason the spectra shifted along the intensities axis
(the value of the constant added to the spectrum plot is by step of 0.7).
Click on the plot for enlarge. 

Colored version of different part of Beta Lyrae spectrum (VisualSpec).
From up to down. Halpha region (July 19.9, 2005), HeI 5875 A (July 20.0, 2005), CaII H&K (July 29.9, 2005).

UV part of the spectrum - CaII  H&K lines
The position of H&K is indicated by vertical dashed lines
The continuum is not rectified and the instrumental response is not taken into acount.
 

INTERLUDE
Wide field images at full-moon light

The cities of Bagnères and Tarbes. Special sum of 19 frames exposed each 12 seconds (see ADD_MAX2 command of Iris).
Canon EOS 350 D at ISO400 + zoom Canon 17-40 mm used at 17 mm f/4. Click on the image for enlarge.
 
Some telescope domes of Pic du Midi station. Special add of 40 x 13 s. frames. Canon EOS 350D + zoom Canon 17-40 mm used at 40 mm f/4.
Click on the image for enlarge.

The 55 centimeters telescope. Special sum of 40 x 13 seconds images. Canon EOS 350D + zoom Canon 17-40 mm at 29 mm f/4.
Click on the image for enlarge.

LISA spectrograph observation

The LISA spectrograph attached to the 60 centimeters telescope. The detector is a modified digital camera Canon EOS 350D (the internal IRcut filter is removed - see here).

The reduced size "true" colors spectrum of Beta Lyrae. Stack of 9 images exposed each 15 seconds
The DSLR is used at ISO100 - the original images are in RAW format and processed with Iris and VisualSpec softwares.

The observed raw signal at the output of the digital camera.

Rectified spectrum. The plot show the real relative flux distribution of Beta Lyr (the instrumental responsivity is extracted from an observation of the star Altair).

Sun at Pic du Midi Observatory

H-alpha image by Valérie Desnoux the July 20, 2005 (PST + SM40).

The sunset...

 
... and the famous greenflash (successively the July 19 and the July 20).

The team at the end of the mission !

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