10 papers · 1 filter
The Long-Term Radial Velocity Stability of the COS G130M/1291 Mode
John Debes, David M. French, Leonardo A. Dos Santos +3
We investigate the long-term radial velocity (RV) stability of one of the Far-UV (FUV) modes on the Cosmic Origins Spectrograph (COS). We do so by using a standard white dwarf, WD~…
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory
Courtney D. Dressing, Danica Adams, Evelyne Alecian +324
The Habitable Worlds Observatory (HWO) is a future NASA flagship mission concept identified by the Astro2020 Decadal Survey as the highest priority for large space missions. HWO sh…
COS2035: Extending COS/FUV Operations Through the 2030s
Marc Rafelski, David Sahnow, Christian I. Johnson +29
The far-ultraviolet (FUV) detector of the Cosmic Origins Spectrograph (COS) accumulates gain sag where photons land, and without continued mitigation this degradation would render…
The Hubble Advanced Spectral Product (HASP) Program
John Debes, Ravi Sankrit, Travis Fischer +39
The Hubble Advanced Spectral Products (HASP) program is designed to robustly coadd Cosmic Origins Spectrograph (COS) and Space Telescope Imaging Spectrograph (STIS) spectra within…
Overview of the New Hubble Spectroscopic Legacy Archive
Ravi Sankrit, John Debes, Matthew Burger +34
The new Hubble Spectroscopic Legacy Archive (HSLA) provides coadded spectra of individual targets that have been observed with the Cosmic Origins Spectrograph (COS) and the Space T…
Verifying the STIS Time Dependent Sensitivity Trends with the Primary CALSPEC Standards
Daniel Stapleton, Svea Hernandez
The STIS team monitors the time dependent sensitivity (TDS) of each grating with one from a set of three secondary CALSPEC standard stars: GRW+70D5824, AGK+81D266, and BD+28D4211.…
Rederivation of STIS Secondary Echelle Mode Traces
Matthew R. Siebert, TalaWanda Monroe, Svea Hernandez
The STIS echelle gratings can be used with a variety of different central wavelength settings. "Secondary" wavelength settings, designed to cover select absorption or emission line…
Recalibration of Pre-SM4 STIS Echelle Throughputs
Matthew R. Siebert, Joleen K. Carlberg, Svea Hernandez +1
Recent improvements to stellar atmospheric models have merited updated flux calibration for high priority STIS observing modes. Specifically, in the FUV and NUV, continuum differen…
Updating the Sensitivity Curves of the STIS Echelles (Post-SM4)
Svea Hernandez, TalaWanda Monroe, Joleen K. Carlberg
The STIS team re-derived on-orbit sensitivity curves for the echelle modes for post-servicing mission 4 observations using the standard DA white dwarf G 191-B2B. These new updates…
Updated Sensitivities of the Five STIS L-mode Gratings
Amy M. Jones, Svea Hernandez, Joleen K. Carlberg +1
Re-derivation of the sensitivities of all of the Space Telescope Imaging Spectrograph (STIS) observing modes were required after major updates were introduced to the model atmosphe…