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Special Notice #306: Telluric standards for T Tau stars campaign spectroscopists

7 November 2012: Further to AAVSO Alert Notice 473 (www.aavso.org/aavso alert-notice/473), Principal Investigator Darryl Sergison (University of Exeter) requests that spectroscopists planning to observe the targets RY Tau, DN Tau, and/or DR Tau image the corresponding telluric standards below at the same time:

Telluric standard for RY Tau
HD 283567     B9     Vmag = 10.38   RA 04 20 33.072  Dec +28 39 08.55

Telluric standard for DN Tau
HD 284571     A0     Vmag = 9.71    RA 04 37 46.253  Dec +24 02 45.93

Telluric standard for DR Tau
HD 286036     A0     Vmag = 10.54   RA 04 46 26.684  Dec +15 59 45.47

Imaging these objects at the same time as the targets will enable the removal of the effects of system response and atmospheric absorption.

Coordinates (2000)
RY Tau        RA 04 21 57.41   Dec +28 26 35.6
DN Tau       RA 04 35 27.38   Dec +24 14 58.9
DR Tau       RA 04 47 06.22   Dec +16 58 42.8

Many thanks and good observing!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

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