Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

SAS home . ... This thread contains a step-by-step recipe to extract PN 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 epproc or available as PPS product; here it has the assumed file name PN.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. ...

We present observations of the spiral galaxy M33 with Spitzer at 24, 70, and 160 ЮМm. ... We compare the morphology of M33 at far-infrared wavelengths with other standard SF indicators such as HЮБ and radio continuum using a Fourier filtering technique to separate the diffuse emission components from compact sources. We find that the infrared emission at 24 and 70 ЮМm follows closely the structure of the ionized gas, indicating that it is heated largely by hot, ionizing stars. ... citations = 45 . ...

... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

home education > resources . SEARCH ASP SITE: Match ALL words Match ANY word . ... Astronomy Education Bibliography . ... Astronomical Pseudo-Science . Moon Resource Guide . ... Astronomy of Many Cultures Resource Guide . ... Activity from NOVA to figure out your birthday in the Maya calendar (if you were born 1980 or after): http://www.pbs.org/wgbh/nova/teachers/activities/pdf/2804_maya.pdf . ... The Maya Astronomy Page (Dawn Jenkins): http://www.michielb.nl/maya/astronom.html . ...