VizieR Online Data Catalog: Chromospheric activity of {rho} CrB and 88 Leo (Metcalfe+, 2021)

Both {rho} CrB and 88 Leo have synoptic S-index time series from the Mount Wilson Observatory (MWO) HK Project, ranging from near the beginning of the program in 1966 to its termination in 2003 (see Figure 1). The MWO S-index measures the ratio of emission from 1Å cores of the CaII H and K lines to the sum of two nearby 20Å pseudo-continuum bandpasses. See Section 2.1.

The Transiting Exoplanet Survey Satellite (TESS) observed {rho} CrB in 2-minute cadence for a total of approximately 52 days during Sectors 24 and 25 of Cycle 2 (2020 April 15-2020 June 08). TESS observed 88 Leo in 2-minute cadence for a total of approximately 27 days during Sector 22 of Cycle 2 (2020 February 18-2020 March 18). See Section 2.2.

We obtained a Chandra observation of {rho} CrB using the High Resolution Camera imaging detector (HRC-I) on 2020 April 19 starting at UT 14:59 for a net exposure time of 11870s (ObsID #22308). An earlier observation of {rho} CrB had also been obtained (PI: S. Saar) several years earlier on 2012 January 17 beginning at UT 13:12 using the Advanced CCD Imaging Spectrometer spectroscopic array (ACIS-S) on the back-illuminated CCD ("s3") for a net exposure of 9835s (obsID #12396). See Section 2.4.

(2 data files).