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T Tau star

Alert Notice 518: Observations of 2MASS J06593158-0405277 needed

April 15, 2015: Dr. Fabienne A. Bastien (Hubble Postdoctoral Fellow, Pennsylvania State University) has requested AAVSO assistance in monitoring the rare FU Ori object 2MASS J06593158-0405277 as part of a campaign to observe this T Tauri star from the optical to the infrared in the coming weeks.  

Special Notice #402: RW Aur more intense monitoring needed now

April 13, 2015: Further to AAVSO Alert Notice 514, the Chandra observations of the classical T Tauri star RW Aur (component A) have been scheduled and will take place

2015 April 16 6:30 - 17:37 UT

Alert Notice 514: RW Aur monitoring requested

March 24, 2015: Dr. Hans Moritz Guenther (Massachusetts Institute of Technology) has requested AAVSO observers' assistance with the classical T Tauri star RW Aur (component A). He writes:
"RW Aur A is a classical T Tauri surrounded by an accretion disk. It's a visual binary; the B component is fainter and shows no sign of a disk. The separation is 1.4 arcsec, but the B component is so much fainter (V = 13.6) that it's not a problem if the binary is not resolved.

Special Notice #378: BP Tau Chandra observation times set - time-series observations needed

December 18, 2013: Further to AAVSO Alert Notice 493, Dr. Hans Moritz Guenther (Harvard-Smithsonian Center for Astrophysics) has been given the precise times of the Chandra X-ray observations to be made of the T Tauri star BP Tau:

year:day:hour:min (in UT):
2013:356:22:52-2013:357:10:00 = 2013 Dec 22 22:52 through Dec 23 10:00 UT

2013:359:14:46-2013:360:06:06 = 2013 Dec 25 14:46 through Dec 26 06:06 UT

2013:361:17:58-2013:362:16:18 = 2013 Dec 27 17:58 through Dec 28 16:18 UT

Alert Notice 493: Request to monitor BP Tau in support of Chandra X-ray observations

December 18, 2013: Dr. Hans Moritz Guenther (Harvard-Smithsonian Center for Astrophysics) has requested nightly observations of the classical T Tauri star BP Tau in support of upcoming Chandra X-ray observations in his study of the accretion processes underway in this star.

Alert Notice 368: Major Outburst of EX Lup

January 29, 2008: Further to AAVSO Special Notice #93, the pre main-sequence eruptive variable EX Lup (AAVSO 1556-40) appears to be  undergoing a major outburst, exceeding the previous brightest maximum recorded in 1955. Albert Jones (Nelson, NZ) reports that EX Lup reached a visual magnitude of 7.9 on 2008 Jan 29.66 UT (JD 2454495.1600). This exceeds the previous brigtest recorded magnitude of this object (m(vis) = 8.7 on JD 2435385.9 and 2435459.1) in 1955-56.  

Alert Notice 488: Observations of AA Tau requested to schedule XMM-Newton

August 1, 2013: Dr. Hans Moritz Guenther (Harvard-Smithsonian Center for Astrophysics) has requested nightly observations of the classical T Tauri star AA Tau in order to schedule x-ray observations with XMM-Newton that have been planned for between 2013 August 15 and September 15.

Alert Notice 473: T Tauri stars observing campaign

November 6, 2012:  Darryl Sergison (University of Exeter) has requested AAVSO assistance with a campaign he is organizing on six T Tauri stars. He writes: "In Autumn 2013 I [and my PhD supervisor Tim Naylor of Exeter University are] undertaking a new study into the nature of pre-main-sequence low mass stars, using time series optical spectroscopy and UV-Visual-IR build a clearer picture of the environment around young solar-type stars and characterise their various disc, accretion, and outflow structures.

Alert Notice 452: Simultaneous observations of SU Aur and AB Aur requested for XMM-Newton

8 February 2012:  Dr. Hans Moritz Guenther, Harvard-Smithsonian Center for Astrophysics, has requested bracketing and simultaneous observations in support of XMM-Newton x-ray observations of the classical T Tauri star SU Aur and the close-by Herbig Ae star AB Aur scheduled for February 15 - 17, 2012. The targets are too bright to use the XMM optical monitor for simultaneous monitoring, so your observing assistance is essential for correlation of the x-ray data.

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