WASHINGTON, May 7 -- Research Notes, a non-peer-reviewed journal that says it features observations in astronomy and astrophysics from the American Astronomical Society, published research articles on the following topics in its May 2021 edition:

* Hardness Test of GRB 950830 as a Gravitationally Lensed Echo

* The Surface Abundances of Maia Revisited

* Visualizing Multiwavelength Properties of Classified X-Ray Sources from Chandra Source Catalog