... HST . Changes in the STIS ETC . ... Data . ... HST Overview . ... Phase I Proposing . ... Retrieving HST Data . ... STIS Data Handbook . ... The latest release of the STIS spectroscopic ETC allows the user to select the dimension of the extraction box perpendicular to the dispersion for point-source calculations. ... Note that while the default pipeline extraction uses a 7 pixel high box for MAMA echelle and CCD modes, for 1st order MAMA modes and the NUV PRISM mode this value is 11 pixels. ...

Next: Semi-major axis change Up: Change of Binary Parameters: Previous: Change of Binary Parameters: . The mass of the star that loses matter is . Accordingly, the mass of the accreting star is . where is the accretion rate   of the captured matter. ... In the case of compact accretors, we require the rate of their mass increase to be limited by the accretion energy output equal to the critical Eddington luminosity   . ...

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... Galactic coordinates are not yet calculated, but this can change in the near future. Currently preference is given to small sources over extended sources if they are present near the same coordinates. ... More work has to be done on the error estimates of source parameters. Countrates are estimated assuming that the source shape is a gaussian. ... This means that for point-like source we can in future calibrate the true countrates versus the wavelet countrates, for small wavelet scales. ...

... Radar ranging experiments use the length of the pulse to determine the height resolution. ... A way around this is to transmit a coded pulse. ... If the changes are discreet then the time between changes is the baud length. The entire length of the pulse is called the code length. ... To extract the signal from code/signal combination you need to decode the received signal. ... If we assume that the Height value does not change much over 1 code length then the received signal can be written as: . ...

Next: Determining UV Variables and Up: UV Data Sets Previous: Variable Override . The uv i/o routines need to know what variables change simultaneously. all variables that have changes simultaneously. Conversely routine uvwrite assumes that all variables that change simultaneously with the variables that it writes, have already been written with routine uvputvr . ... For an input file, a call to uvnext causes the next set of variables (which change simultaneously) to be read. ...

... Return to the Kernel page . ... Kernel . ... This article is part of the LWN Porting Drivers to 2.6 series . One might be tempted to think that the basic task of keeping track of the time would not change that much from one kernel to the next. ... One change which shouldn't be problematic for most code is the change in the internal clock rate on the x86 architecture. In previous kernels, HZ was 100; in 2.6 it has been bumped up to 1000. ... Driver porting: Timekeeping changes . ...

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Next: When the clock is Up: Keeping Time Previous: The hardware and software . In the Debian system, the system time zone is determined by the symbolic link /etc/localtime љ . ... If it is unset, the system time zone is assumed. ... The date љ command shows the current date and time. ... date љ is also used to set the kernel's software clock: # date 07142157 . ... While each user can have his own time zone, the clock is the same for everyone. date љ only shows or sets the software clock. ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

The Australian Academy of Science is releasing The science of clima