We report preliminary optical/infrared photometry and spectroscopy of the SWIFT J1753.3-0127 transient (ATEL #546, #549) obtained at Fred Whipple Observatory (FLWO), Mt. Hopkins, AZ. Nightly R-band photometry was acquired with the FLWO 1.2m telescope between July 2-11 2005 UT achieving a PSF FWHM of 1.8-2.8 arcsec and typically using 60s exposure

The force of gravity acting within the volume occupied by young, compact, and massive super star clusters is here shown to drive in situ all the matter deposited by winds and supernovae into several generations of star formation. These events are promoted by radiative cooling, which drains the thermal energy of the ejected gas causing its

The linear oscillations of a stratified atmosphere embedded in a uniform vertical magnetic field are studied here. We use a simple theoretical model, formed by the superposition of two isothermal layers, representing, respectively, i) the photosphere and the chromosphere, and ii) the corona. The bottom layer behaves, for some modes, as a resonant

We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24{mu}m using the Multiband Imaging Photometer (MIPS) and also with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We assemble optical/infrared spectral energy distributions (SEDs) for 45 X-ray/24{mu}m sources in

The importance of the breakup channel in the vicinity of the Coulomb barrier (1

H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lac objects known, with extreme emission properties at radio, optical, and X-ray frequencies. Furthermore, in our WFPC2 snapshot survey we discovered a series of peculiar arcs describing a 2.4" radius ring surrounding the source. This paper describes follow