We examine the impact of non-Gaussian photometry errors on photometric redshift performance. We find that they greatly increase the scatter, but this can be mitigated to some extent by incorporating the correct noise model into the photometric redshift estimation process. However, the remaining scatter is still equivalent to that of a much shallower survey with Gaussian photometry errors. We al...

Infrared photometry and later infrared spectroscopy provided powerful diagnostics to distinguish between the main emission mechanisms in galaxies: AGN and Starburst. After the pioneering work on infrared photometry with IRAS in the far-IR and the S.Pedro Martir and ESO ground-based work in the near-IR, ISO photometry extended up to 200μm the coverage of the galaxies energy distributions. Then S...

The Ultraviolet-Optical Telescope (UVOT) onboard Swift has the capability to provide critical insight into the physics of the early afterglows of gamma-ray bursts (GRBs). But without precise calibration of the UVOT to standard photometric systems, it is impossible to leverage late-time, ground-based follow-up data to the early-time UVOT observations. In this paper, we present a calibration of t...

The dynamic range of the XMM–Newton Optical Monitor (XMM-OM) is limited at the bright end by coincidence loss, the superposition ofmultiple photons in the individual frames recorded from its micro-channel-plate (MCP) intensified charge-coupled device (CCD) detector. One way to overcome this limitation is to use photons that arrive during the frame transfer of the CCD, forming vertical read-out ...

We present the science database produced by the Formation and Evolution of Planetary Systems (FEPS) Spitzer Legacy program. Data reduction and validation procedures for the IRAC,MIPS, and IRS instruments are described in detail. We also derive stellar properties for the FEPS sample from available broadband photometry and spectral types, and present an algorithm to normalize Kurucz synthetic spe...

The cataclysmic variable V1504 Cyg is observed at the UCI Observatory for periodic variability, showing that the observatory is capable of performing time-resolved photometry on a dwarf nova system. The software package IRAF is used to calibrate the images and to measure the flux from the target and several reference stars with aperture photometry. These same stars are then used to compute diff...

We present our catalog of U , B, V , and I stellar photometry of the central 64 deg area of the Large Magellanic Cloud. Internal and external astrometric and photometric tests using existing optical photometry (U , B, and V from Massey’s bright star catalog and I from the near-infrared sky survey DENIS) are used to confirm our observational uncertainty estimates. We fit stellar atmosphere model...

We present V-band light curves of 61 variables from the core of the globular cluster M5 obtained using a newly developed image subtraction method (ISM). Four of these variables were previously unknown. Only 26 variables were found in the same field using photometry obtained with DoPHOT software. Fourier parameters of the ISM light curves have relative errors up to 20 times smaller than paramete...

The Ultraviolet-Optical Telescope (UVOT) onboard Swift has the capability to provide critical insight into the physics of the early afterglows of gamma-ray bursts (GRBs). But without precise calibration of the UVOT to standard photometric systems, it is impossible to leverage late-time, ground-based follow-up data to the early-time UVOT observations. In this paper we present an empirical determ...