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New HLSPs for April

NGC5044-HST analyzes the morphology of ionized gas filaments and dust structures in the center of NGC 5044. This enables studies of the spatial relationship between warm ionized gas, dust, and sites of recent star formation in this nearby galaxy group.

GUVCAT-HOTSTARS is a set of catalogs derived from 71k GALEX UV sources with FUV - NUV colors <= 0.1 mag and have SDSS photometry, corresponding to stellar Teff>~20,000K. 51% of the binary- and 20% of the single-star candidates are previously unknown objects.

Updated HLSPs for April

OPAL adds HST observations of Jupiter Cycle 32 from December 2025

QLP light curves from Sector 100 are now available, adding 2,049,834 targets at 200 second cadence.

REFERENCE-ATLASES includes four changes: (1) new ACS, COS, and STIS throughputs; (2) new radial velocities for Vega & WD0308-565, along with new WFC3 grism spectra, WFC/ACS photometry, and STIS spectra (3) updated WFC3 IR throughput tables, including corrections for time-dependent sensitivity loss; (4) new filter sets: Gaia EDR3 blue and red; filters z, y, j, h and ks for the VISTA VIRCAM instrument; and ten filters aboard the ASTROSAT UVIT instrument. 

figure 5 from Bianchi 2024
GUVCAT-HOTSTARS: Figure 5 from Bianchi 2024. The green line shows the adopted separation between candidate single (green dots) and binary (orange dots) hot evolved stars. Model colors for hot compact stars (log g = 7 and 9, Teff = 100,000–15,000 K, purple lines), main-sequence stars and supergiants (red and yellow sequences, respectively), sample binaries consisting of a WD of Teff = 100,000 K, 30,000 K, and 20,000 K (purple, black, and purple, respectively), radius = 0.02R⊙ and 0.1R⊙, and a main-sequence or giant star companion of representative spectral types. The QSO locus is also shown (cyan; the large diamond marks redshift = 0). Model colors are unreddened; thin arrows shown on some models indicate EB−V = 0.2 mag reddening. Triangles on the purple single WD sequences (log g = 7 and 9) mark Teff = 200 kK, 30 kK, 20 kK, and 15 kK.

 

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