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The STECF Calibration Enhancement effort for the Space Telescope Imaging Spectrograph (STIS) aims to improve data calibration via the application of physical modelling techniques. As part of this effort we have developed a model of the STIS…

Astrophysics · Physics 2007-05-23 Paul Bristow

Context. Current and future blind surveys for HI generate large catalogs of spectral lines for which automated characterization would be convenient. Aims. A 6-parameter mathematical model for HI galactic spectral lines is described. The aim…

Instrumentation and Methods for Astrophysics · Physics 2015-06-19 I. M. Stewart , S. -L. Blyth , W. J. G. de Blok

The visual STELLA echelle spectrograph (SES-VIS) is a new instrument for the STELLA-II telescope at the Iza\~na observatory on Tenerife. Together with the original SES spectrograph - which will still be used in the near IR - and a new…

Instrumentation and Methods for Astrophysics · Physics 2020-12-16 Michael Weber , Klaus Strassmeier , Manfred Woche , Ilya Ilyin , Arto Järvinen

Post-hoc calibration methods are widely used to improve the reliability of probabilistic predictions from machine learning models. Despite their prevalence, a comprehensive theoretical understanding of these methods remains elusive,…

Machine Learning · Computer Science 2025-09-30 Kristina P. Sinaga , Arjun S. Nair

We present a combined photometric calibration of the SNLS and the SDSS supernova survey, which results from a joint effort of the SDSS and the SNLS collaborations. We deliver fluxes calibrated to the HST spectrophotometric star network for…

The ESA mission "Space Optical Clock" project aims at operating an optical lattice clock on the ISS in approximately 2023. The scientific goals of the mission are to perform tests of fundamental physics, to enable space-assisted…

The high-resolution near-infrared spectrograph CRIRES+ at ESO VLT covers the Y, J, H, K, L and M bands. The U-Ne and Fabry-Perot calibration light sources, however, only work up to the K-band, leaving the bands L and M without wavelength…

Instrumentation and Methods for Astrophysics · Physics 2026-04-28 Thomas Marquart , Alexis Lavail

We present a compilation of spectra of 101 Seyfert galaxies obtained with the Space Telescope Imaging Spectrograph (HST-STIS), covering the UV and/or optical spectral range. Information on all the available spectra have been collected in a…

Astrophysics · Physics 2015-06-24 P. F. Spinelli , T. Storchi-Bergmann , C. H. Brandt , D. Calzetti

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 lines, have not been calibrated as precisely as their primary…

Instrumentation and Methods for Astrophysics · Physics 2026-03-11 Matthew R. Siebert , TalaWanda Monroe , Svea Hernandez

Scientific applications are complex, large, and often exhibit irregular and stochastic behavior. The use of efficient loop scheduling techniques in computationally-intensive applications is crucial for improving their performance on…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-06-08 Ali Mohammed , Ahmed Eleliemy , Florina M. Ciorba

A systematic programme of calibration observations was carried out to monitor the performance of the SPIRE FTS instrument on board the Herschel Space Observatory. Observations of planets (including the prime point-source calibrator,…

We present the photometric calibration of the HST Advanced Camera for Surveys (ACS). We give here an overview of the performance and calibration of the 2 CCD cameras, the Wide Field Channel (WFC) and the High Resolution Channel (HRC), and a…

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. Here, we use the three primary CALSPEC White Dwarf standard…

Instrumentation and Methods for Astrophysics · Physics 2026-04-27 Daniel Stapleton , Svea Hernandez

The linear polarization observations of S5 0716+71 carried out by the author in 2019-2021 were continued from December 8, 2021 to March 12, 2022. These observations confirm the author's argument made in 2022 about a periodic dependence of…

High Energy Astrophysical Phenomena · Physics 2024-09-05 V. R. Amirkhanyan

ERIS is an instrument that will both extend and enhance the fundamental diffraction limited imaging and spectroscopy capability for the VLT. It will replace two instruments that are now being maintained beyond their operational lifetimes,…

Precise sensor calibration is critical for autonomous vehicles as a prerequisite for perception algorithms to function properly. Rotation error of one degree can translate to position error of meters in target object detection at large…

Robotics · Computer Science 2025-06-24 Zhongyuan Li , Honggang Gou , Ping Li , Jiaotong Guo , Mao Ye

Safety-critical prediction systems, such as autonomous vehicles, weather forecasters, and medical monitors, commonly rely on probabilistic forecasters. These forecasters make predictions about possible future outcomes, and their quality and…

Methodology · Statistics 2026-04-30 Romeo Valentin

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 relied on the recent CALSPECv11 models, which introduced…

Instrumentation and Methods for Astrophysics · Physics 2026-03-05 Svea Hernandez , TalaWanda Monroe , Joleen K. Carlberg

The efficiency of science observation Short-Term Scheduling (STS) can be defined as being a function of how many highly ranked observations are completed per unit time. Current STS at ESO's Paranal observatory is achieved through filtering…

Instrumentation and Methods for Astrophysics · Physics 2024-07-24 Joseph P. Anderson , Elyar Sedaghati , Aleksandar Cikota , Natalie Behara , Fuyan Bian , Angel Otarola , Steffen Mieske

Reconfigurable intelligent surfaces (RISs) are key enablers for integrated sensing and communication (ISAC) systems in the 6G communication era. With the capability of dynamically shaping the channel, RISs can enhance communication…