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http://www.arcetri.astro.it/irlab/instr/nics/generale/prest.html.
http://www.arcetri.astro.it/irlab/instr/nics/generale/prest.html.
1. Amateur Astronomers Association of New York ? Amateur Astronomers Association
... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...
2. How to extract MOS spectra of a point-like source and associated matrices
... This thread contains a step-by-step recipe to extract MOS spectra of a point-like source observed in Imaging mode and to create associated response matrices, starting from a calibrated, concatenated event list (either produced with emproc or available as PPS product; here it has the assumed file name MOS.fits ). ... The users should note that the SAS metatask xmmselect allows them to interactively define source and background regions (via ds9) and to run backscale on the fly. ...
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Ссылки http://xmm.vilspa.esa.es/sas/7.0.0/documentation/threads/MOS_spectrum_thread.html -- 11.6 Кб -- 15.06.2007
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3. Association Keywords
Chapter 2: Header Keyword Definitions . ... T/F- Was the observation an association? ... Looking at the ASN_MTYP and EXPNAME keywords for each extension of the n48o06020_jif.fits file, we see... n48o06020_jif.fits [1], ASN_MTYP = EXP-TARG EXPNAME = N48O06G9J n48o06020_jif.fits [2], ASN_MTYP = EXP-TARG EXPNAME = N48O06GAJ n48o06020_jif.fits [3], ASN_MTYP = EXP-BCK1 EXPNAME = N48O06GBJ n48o06020_jif.fits [4], ASN_MTYP = EXP-BCK1 EXPNAME = N48O06GCJ n48o06020_jif.fits [5], ...
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Ссылки http://www.stsci.edu/instruments/observatory/obslog/OL_7a.html -- 8.6 Кб -- 16.10.1997
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4. ADASS 2002 Conference Proceedings
... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...
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Ссылки http://www.adass.org/adass/proceedings/adass02/P4-2/ -- 25.4 Кб -- 12.03.2003
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5. Errors associated with reducing filterbank data
About the only thing that can go wrong is not having the pulsar details correct in the catalogue OR not integrating for long enough. ... You can check what the catalogue thinks it knows about the pulsar by using psrinfo and typing . ... NSUB: - Number of frequency sub-bands . ... Note if you are reducing this data at Parkes you will have to copy psrcat.unformatted back up to $PSRHOME/soft/psrinfo at Parkes before rerunning tarchfb_driver. Back to the Filterbank data reduction page. ...