December 6, 2020
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Further to AAVSO Alert Notice 514, Dr. Hans Moritz Guenther (Massachusetts Institute of Technology) informs us that X-ray observations have been scheduled with Chandra for the classical T Tauri star RW Aur (component A).
Chandra is scheduled to observe RW Aur as follows (the start time is given; each observation is a few hours long):
2020 December 07 09:46:50 UT
2020 December 07 21:19:40
2020 December 13 00:58:05
2020 December 15 00:00:00
Dr. Guenther requests nightly observations in as many filters as possible; time series are not necessary. Visual observations are welcome. Once the Chandra observations are over, ongoing multi-filter monitoring is requested - the campaign on RW Aur, which began in 2015, is continuing at least through 2022.
RW Aur normally varies between about 10.0 and 11.0 visually (9.6-11.2V), although it can be as bright as 9.7 and faint as 13.6. Since 2015 it has shown very interesting behavior; see the light curve from the AAVSO International Database (AID) below. As of 2020 Dec. 3.1040 UT it was 11.546 V +/- 0.014 (C. Cynamon, Mount Airy, MD) and Dec. 6.1380 UT it was visual magnitude 11.6 (E. Sawyer, Chicoutimi, QC, Canada).
Note that a light curve of RW Aur observations in the AID may be plotted using the AAVSO Light Curve Generator (https://www.aavso.org/LCGv2).
AAVSO light curve of RW Aur, June 2009 - December 2020; 8,051 multicolor observations contributed by 127 observers worldwide.
Coordinates (2000): R.A. 05 07 49.57 Dec. +30 24 05.2 (VSX page for RW Aur)
Charts with comparison stars for RW Aur may be created using the AAVSO Variable Star Plotter (VSP).
Submit observations: Please submit observations to the AAVSO International Database using the name RW AUR.
This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
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