The large and small-scale (pc) structure of the Galactic interstellar medium can be investigated by utilising spectra of early- type stellar probes of known distances in the same region of the sky. This paper determines the variation in line strength of CaII at 3933.661{AA} as a function of probe separation for a large sample of stars, including a number of sightlines in the Magellanic Clouds. FLAMES-GIRAFFE data taken with the Very Large Telescope towards early-type stars in 3 Galactic and 4 Magellanic open clusters in CaII are used to obtain the velocity, equivalent width, column density, and line width of interstellar Galactic calcium for a total of 657 stars, of which 443 are Magellanic Cloud sightlines. In each cluster there are between 43 and 111 stars observed. Additionally, FEROS and UVES CaII K and NaI D spectra of 21 Galactic and 154 Magellanic early-type stars are presented and combined with data from the literature to study the calcium column density - parallax relationship.
Cone search capability for table J/A+A/582/A59/tablea14 (FLAMES-GIRAFFE observations of NGC 4755, profile fits)
Cone search capability for table J/A+A/582/A59/tablea15 (FLAMES-GIRAFFE observations of NGC 6611, profile fits)
Cone search capability for table J/A+A/582/A59/tablea16 (FEROS and UVES observed CaII K and NaI D profile fit values towards Magellanic stars)
Cone search capability for table J/A+A/582/A59/tablea3 (NGC 1761 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea1 (NGC 330 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea8 (FEROS_plus_UVES_Sample)
Cone search capability for table J/A+A/582/A59/tablea4 (NGC 2004 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea5 (NGC 3293 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea2 (NGC 346 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea6 (NGC 4755 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea7 (NGC 6611 observed with FLAMES-GIRAFFE)
Cone search capability for table J/A+A/582/A59/tablea9 (FLAMES-GIRAFFE observations of NGC 330, profile fits)
Cone search capability for table J/A+A/582/A59/tablea10 (FLAMES-GIRAFFE observations of NGC 346, profile fits)
Cone search capability for table J/A+A/582/A59/tablea11 (FLAMES-GIRAFFE observations of NGC 1761, profile fits)
Cone search capability for table J/A+A/582/A59/tablea12 (FLAMES-GIRAFFE observations of NGC 2004, profile fits)
Cone search capability for table J/A+A/582/A59/tablea13 (FLAMES-GIRAFFE observations of NGC 3293, profile fits)
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