In this STAN we announce COS posters at the January 2021 meeting of the American Astronomical Society and the incorporation of updated dark rates into the COS exposure time calculators.
Contents: 1 WFC3 at AAS 237! 2 Updates on stsynphot and pysynphot 3 DASH (Drift And SHift) Data Processing Package and User Tutorial 4 'Single Visit Mosaics': New MAST Data products 5 Introducing ExoCat: Catalogue of WFC3 Transiting Exoplanet Observations 6 New Documentation
This STAN describes updates to the ACS WFC flux calibration, geometric distortion, read noise, and documentation.
The 52nd DPS meeting, held virtually, will provide solar system and exoplanet observers the opportunity to have their HST research questions regarding proposals and archive facilities answered.
In this STAN we announce an update to the calculation of uncertainties in CalCOS and the delivery of new time-dependent sensitivity and photometric throughput tables for FUV observations.
Contents: Updated WFC3 Flux Calibration
In this STAN we announce the deliveries of new reference files for the calibration of COS spectra obtained with the FUV blue modes G130M/1055 and G130M/1096 and with the NUV gratings G185M, G225M, and G230L.
Spatial scanning with the STIS CCD is an available-but-unsupported mode for obtaining high S/N ratio spectra of relatively bright targets by trailing the target in the spatial direction within one of the long STIS apertures. Spatial scanning offers particular advantages for red and near-IR spectra (where ground-based observations can be severely contaminated by telluric absorption and where the STIS CCD spectra are affected by fringing) and for accurate monitoring of stellar fluxes. In this article, we briefly summarize results from the analysis of scanned spectra of the well-known exoplanet host star 55 Cnc that were obtained for a special calibration program designed to assess the flux stability achievable with this observing mode.
In this STAN we announce a CALSPEC update, including a schedule for the implementation of the resulting flux calibration changes for HST instruments. We also provide advice on verifying coordinates in APT for targets that have proper motions.
This STAN provides information about updates to CALSPEC and the schedule for implementing changes to flux calibration for HST instruments, a discussion about how to access the correct coordinates for targets with proper motions in APT, and an update on the STIS python defringing tools, which are now available in the stistools package.
Ahead of the upcoming Cycle 28 Phase II deadline, this STAN provides information regarding STIS best practices for submitting Phase II's. In addition, information regarding updates to the STIS Exposure Time Calculator for Cycle 28 Phase II, new posters from the recent American Astronomical Society meeting, and information regarding the recent redelivery of several super-dark and super-bias reference files is available in this STAN.
Contents: : WFC3 in Action! Visit us (online) at the 236th AAS Meeting Cycle 28 Tips and Advice New Absolute Astrometry in MAST Data Products WFC3/IR Sensitivity Over Time EPER Update WFC3 Quicklook Anomalies Database The Dispersed infrared background in WFC3 G102 and G141 observations HST 30th Anniversary Image Information New Documentation
In this newsletter we announce a new CalCOS release, provide updated dark rates, and announce the availability of line spread functions and cross-dispersion spread functions for cenwaves introduced in Cycle 26.
In this newsletter we provide updates about COS to those who are preparing Phase I proposals for HST Cycle 28.
This STAN provides information regarding the updates made to the STIS Exposure Time Calculator (ETC) for Cycle 28 Phase I, news regarding the sensitivity recalibration of the E140M grating and the delivery of new PHOTTAB and RIPTAB files in support of this recalibration, updates to the NUV-MAMA dark rate, and the status of a new suite of Python STIS Defringing Tools.