The CCDs and their associated signal chains have readout noise levels (in the absence of signal shot noise or interference) of approximately 5e - . The analog-to-digital converter is highly accurate, and makes virtually no contribution to the read noise, other than the normal information loss caused by digitization of the signal. ... Note that all calculations of sensitivity in this manual assume gains of 7 and 14 for two gain channels, choices very close to the measured gains. ... 0.41 . ...

... omdetect (omdetect-5.14.2) [?? Meta Index / Home Page / Source Flagging Algorithms Since the object producing a read-out streak may lie outside the image, another algorithm is also used by omdetect. ... nMin = int( 0.6 (ny + 1)) where ny is the number of rows in the image (image height) . ... Loop through all the columns of the image . ... n4 = count(image(i0, :) image(i0 + 1, :) ) Count the number of pixels along column i0 that have a greater value than their neighbour in column i0 + 1 . ...

... Plot vectors may be generated in several ways: . a. You may read the vectors from a file using the read command The file is expected to be an ASCII file of columns of numbers (separated by spaces or commas). You define the file to SM using the data command, and associate a column or row of numbers with a SM vector using the read command. ... I can also read a row from the file, instead of a column, by saying read row x 1 Note that the vector is defined by the read command. ...

... Class . ... ImageJ Plugin for reading an AVI file into an image stack (one slice per video frame) Version 2008-07-03 by Michael Schmid, based on a plugin by Daniel Marsh and Wayne Rasband Restrictions and Notes: - Only few formats supported: - uncompressed 8 bit with palette (=LUT) - uncompressed 8 16 bit grayscale - uncompressed 24 32 bit RGB (alpha channel ignored) - uncompressed 32 bit AYUV (alpha channel ignored) - various YUV 4:2:2 compressed formats - png or jpeg-encoded individual frames. ...

... The Multiple Extension FITS (MEF) file interface is an IRAF library providing facilities for general file operations upon FITS multi-extension files. ... The Multiple Extensions FITS (MEF) interface consists of a number of routines to mainly read a FITS Primary Data Unit or an Extension Unit and manipulate the data at a file level. ... Read the FITS header of a MEF file that matches the EXTNAME or EXTVER keyword values or if not specified, read the extension number `group'. ... The header filename. ...

... In the first implementation of optional raw data output in CONSTRICTOR, NPOI raw data of a scan was written into a single HDS formatted file. ... Sub-scan files can still be read individually, but the standard procedure is to read and concatenate at least the time stamps and delay line metrology data from all sub-scans, and then to read the fringe data individually. get_rawdata ,[ file_spec _char ] Procedure to read raw time and delay data from one or more sub-scan files specified by file_spec . ...

Next: Calibration Frames and Up: CCD Reductions Previous: General Overview of . ... These defaults are taken from the CCD keyword structure. ... For combining the calibration frames in master calibration frames the system is provided with a set of keywords for each exposure type (see below); . ... For handling all these keywords the CCDRED package in equipped with five commands: HELP/CCD , SHOW/CCD , SET/CCD , SAVE/CCD and INIT/CCD . ... BS keywords for combining bias frames; . ...

... One of these factors is how the client application uses VDPAU; i.e. the number of surfaces allocated for buffering, order of operations, etc. ... At a bare minimum, the application must allocate one video surface for each reference frame that the stream can use (2 for MPEG or VC-1, a variable stream-dependent number for H.264) plus one surface for the picture currently being decoded. However, if this minimum number of surfaces is used, performance may be poor. ... Performance Levels . ...

... Behemoth black hole found in an unlikely place . ... black holes . ... Observing springtime deep-sky objects with a large telescope . ... Could large numbers of black holes account for much of the "dark matter" estimated to exist in our universe? ... NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) No, because the universe never had the raw material to grow enough black holes to account for current estimates of dark matter. Get instant access to subscriber content on Astronomy.com! ...

To ... Command . display the current message <Return> display message number n n display message for a specific user p user display next [previous] page of headers z [-] redisplay the mail headers h . Examples .

... Fields: Each document is assigned a unique inventory code. Definitions reflect information commonly found on a document, i.e. title, number, vendor, dates, etc. Please read Fields for detailed definitions. ... details and history of the document.html locator . ... Links: An HTML locator is created when the document is coded. ... Document Files: Each inventory code is a separate document. ... Using the HTML locator links the user to the document. Database Home page | APO Home Page | ...

... Flight 1) 2) 3) Flight 1) 2) 3) model FM1 has the following parts: LNA MY-18, serial number PN 01-0252, factory number FM1; receiver box KRT-18, serial number PN 17660-01, factory number FM-001; DC-DC converters IVEP1 and IVEP2, factory number 05. model FM2 has the following parts: LNA MY-18, serial number PN 01-0252, factory number FM2; Receiver box KRT-18 serial number PN 17660-01, factory number FM-002; DC-DC converters IVEP1 and IVEP2 factory number 06. ... See Appendix 1. ... 2003. ... 2004 . ...

Comedi Documentation . ... I assume that your hardware device is in your computer, and that you know the relevant details about it, i.e., what kind of card it is, the I/O base, the IRQ, jumper settings related to input ranges, etc. To tell the comedi kernel module that you have a particular device, and some information about it, you will be running the comedi_config command. ... The overall info gives information about the device -- basically the same information as /proc/comedi. ...

... IRAF Multiple Extensions FITS (MEF) Files Interface Nelson Zarate National Optical Astronomy Observatories Tucson, AZ 85719 (zarate@noao.edu) Abstract. ... If there are no values to match then `extver' should be INDEFL. 3.2. mef rdhdr gn (mef,group) Read extension number `group'. ... The header should have been read by now. mefo The output file MEF pointer returned by mef open. 4.2. mef copy extn (mefi, mefo, group) Copy a FITS extension given by its number `group' into an output file. ...

repetition index means value+1: ; 0 means 1 iteration, 2 means 3 iterationis, 255 (the max) ; means 256 iterations ; This apply on BOTH loop and output mask, so (LINE @ 0) means LINE for 1 ; clock cycle ; some symbols ; ZERO equ #0 ; all void BASE equ ZERO ; standard no operation pattern PIXEL equ #01 ; xclock XSYNC equ #02 ; xsync LINE equ #04 ; yclock YSYNC equ #08 ; ysync RSTX equ #10 ; Reset of all Quadrants SOCX ...

... It adds together the first two of these numbers. If the result is greater than the # third number, it prints all three numbers out (to a file called results.d) # Otherwise it prints out a rude message # First , open the files inhandle = open ('data.d', 'r') outhandle = open ('results.d', 'w') # Now loop through all the lines in the input. for line in inhandle: allarray = line .split() # Split the line you've just read in into its component bits n1 = float ( ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Science . ... Winer . ... Contact Us . ... The Ohio State University uses the KELT telescope to survey the sky photometrically for extrasolar planets. ... Ohio State also uses a 20-inch Meade telescope called DEMONEX telescope to verify exoplanet candidates identified by surveys such as KELT. ... For more information, visit www.tenagraobservatories.com or to see the invidual discovery images, click here . ...

... The particular variables it is concerned with are tick , which is the number of microseconds added to the system time during a clock interrupt, tickadj , which sets the slew rate and resolution used by the adjtime system call, and dosynctodr , which indicates to the kernels on some machines whether they should internally adjust the system clock to keep it in line with time-of-day clock or not. ... Set the kernel variable tickadj to an internally computed "optimal" value. -t tick . ...

Astronomy Discussion Forums . ... A Number Is A Very Specific Thing . ... Post Message | ... Posted by Harvey on October 9, 2002 16:41:15 UTC . ... When you use the word 'number', you are introducing a specific kind of symbol that is known within the context of mathematics. ... You know what - harvey1 - October 9, 2002 - 20:53 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Family ASTRO Event Leaders can follow the links below to find a number of resources and more background reading to help them with their Astronomy Events and expand their knowledge on the topics covered in our series of Leader Kits for educators. ... Print and Web Resources on the Night Sky . ... If you have questions about Family ASTRO, see our Frequently Asked Questions for Educators and Astronomers page , or our Frequently Asked Questions for Families and Friends page. ...