ﻻ يوجد ملخص باللغة العربية
This report describes the generation of fully calibrated spectra of the K giants HR 6348 and HD 173511 from data obtained with the low-resolution modules of the Infrared Spectrograph (IRS), with an emphasis on the spectra from the Long-Low (LL) module. The spectra were calibrated using Kurucz models and IRS observations of the A dwarfs alpha Lac and delta UMi. The calibration process required mitigation for fringing in the first-order LL spectrum and a faint red excess in alpha Lac which may arise from a low-contrast debris disk. The final calibrated spectrum of HR 6348 has a spectroscopic fidelity of 0.5% or better below 29 um, with an uncertainty increasing to ~1% at 33-37 um. The final calibrated spectrum of HD 173511 has a spectroscopic fidelity of ~0.5% at all wavelengths below 35.8 um.
This report describes in detail the generation of a truth spectrum of HR 6348, using observations with the Short-Low (SL) module of the Infrared Spectrograph of HR 6348, and the A dwarfs alpha Lac and delta UMi. Using spectral ratios, we can propagat
We investigate how the shape of a spectrum in the Short-Low module on the IRS varies with its overall throughput, which depends on how well centered a source is in the spectroscopic slit. Using flux ratios to quantify the overall slope or color of th
We present a calibration of the acquisition data obtained by the Red Peak-Up (PU) sub-array on the Infrared Spectrograph on Spitzer, based on repeated observations of three K giants. This calibration is tied directly to the most current infrared cali
Given that low-mass stars have intrinsically low luminosities at optical wavelengths and a propensity for stellar activity, it is advantageous for radial velocity (RV) surveys of these objects to use near-infrared (NIR) wavelengths. In this work we d
The full third Gaia data release will provide the calibrated spectra obtained with the blue and red Gaia slit-less spectrophotometers. The main challenge when facing Gaia spectral calibration is that no lamp spectra or flat fields are available durin