... To be read in conjunction with Section 4.11 of the WFPC2 Instrument Handbook , -Version 4.0. ... 1 The second study found evidence that CTE loss for faint stars has increased with time (Whitmore, 1998). The primary observational consequence of CTE loss is that a point source at the top of the chip appears to be fainter than if observed at the bottom of the chip, due to the loss of electrons as the star is read out down the chip (see Figure 1 ). ... Last updated: 06/16/98 10:38:00 . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... Meta Index / Home Page / Errors . ... warning . ... For instance, if the PROPOSAL information record is missing the user can add a fake one to the SOSF without this having any effect on the data reduction. corrective action: Continue. ... For a certain exposure in the ODF one of the parameters was not found in the housekeeping data. ... RGS, EPN, OM : the current exposure is found to contain more than one distinct calibration mode. corrective action: In the summary file: MODE = UNDEFINED . ... error...

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

... Second, the observatory can control the configuration, test data analysis procedures, and provide calibration solutions with the help of instrument models. This paper presents the VLT object-oriented framework for the development of ETCs (Exposure Time Calculators) and data simulators. ... Instrument simulations are being developed for the purpose of predictive calibration, instrument configuration control, and evaluation of data analysis procedures. ...

IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...

... Radio telescope interferometers exhibit chromatic aberration effects. ... Reduction packages such as AIPS and AIPS++ will produce a beam pattern image for each frequency channel. This allows these packages to compute a spectral-line cube which has a pixel size (cellsize) independent of frequency. ... Because of this, Miriad produces cubes where the pixel size changes with frequency. ... The correct approach is to produce a cube in Miriad which does not have a variable pixel size. ...

Proposal Identification No.: T2085 Date Received: 2005­Jan­31 21:48:11 Technical Page Proposal Type: Regular General Category: Terrestrial Aeronomy Sub­Category: Radar Observation Category: Thermosphere Total Time Requested: 48 Hours Proposal Title: Radar and optical mapping of the midnight temperature maximum structure during summer nights. ... This instrument is designed to operate automatically with remote control by Internet access. ... X Maybe X Part of the observing run. ...

NEWS February ``black drop'' phenomenon observed during planetary tran­ couldhave thesameexplana­ similar effect Saturn, say MEBailey, DStewart andMStronge. ... Extending the black drop to Saturn Images transit Venus 1769 byCharlesGreenand James Cook, showing classical ``black drop'' phenomenon (RASarchive). ... Ball notes the planet's shadow presents anomalous features may optical illusion Human space­ flight review convening a commis­ report case space, reports SueBowler. ...