Next: Order Merging Up: Instrument Response Correction Previous: Using a Standard . ... It consists of a correction for the blaze function by using a suitable model of the blaze effect introduced by the echelle grating. ... This method uses the overlapping region of adjacent orders to estimate, in a few iterations, the parameter k of the blaze function which is, as before, assumed to be a sinc square. ... The method minimises the difference of the corrected orders in each of the overlapping intervals. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... The absolute flux calibration of NICMOS will be calculated from observations of standard stars with known flux distributions F( ). ... In order to expand the set of IR standard stars in the appropriate flux range for NICMOS, M. Rieke, R. Thompson, and collaborators at the University of Arizona are making photometric observations of solar-analog stars, which will be used to normalize the solar spectrum to the observed IR magnitudes. ... Relative flux references accurate to 1.5% for standard...

Next: Examples of Setup Files Up: Setup Files Previous: Setup Files Contents . Over 200 standard setup files have been created, covering many of the normal modes of observing. ... These especially include precisely defined, and somewhat complex cases like the Mark III standard modes (although MarkIII went the way of the dinosaur long ago. ... v '' files: . These are setup files for VLBI observations using VLBA recording formats. ... These are setup files for Mark III observations. ...

... We demonstrate through numerical simulations that model parameters estimated with our technique are essentially bias-free, even when the average number of counts per bin is 1. ... The IW technique avoids such biases by estimating through successive iterations, where for each iteration, j, , and the best-fit parameters are determined by minimization of . ... In our sample, we find that the minimum values and best-fit parameters converge after about 6 iterations. ...

... hkgtigen (hkgtigen-1.14.2) [xmmsas_20060628_1801-7.0.0] . Meta Index / Home Page / Description For each instrument standard HK parameter validity ranges are stored in the corresponding CCF constituent HKParmInt [ 2 ]. The ranges are expressed in terms of boolean selection expressions as defined by the selectlib package. ... In more detail, when invoked for a particular instrument (see parameter instrument ), hkgtigen performs the following operations to construct the single GTI data set: . ...