... WFPC2 ETC for Extended Sources - v4.0 . Home . ... Data . ... WFPC2 Home . ... Instrument Home . WFPC2 History . ... LRF Data . ... Data Analysis . Data Analysis Home . Data Analysis Library . ... Brightness: (mag. arcsec -2 ) . ... Line: Ly 1216 C IV 1550 He II 1640 C III 1907 Mg II 2800 0 II 3727 Ne III 3869 H 4340 0 III 4363 He II 4686 H 4861 0 III 4959 0 III 5007 N II 5755 He I 5876 0 I 6300 N II 6548 H 6563 N II 6583 S II 6716 S II 6731 S III 9531 Specify Z Vel. : (units) . ...

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

You can use this window to involve parameters of fitting . to plot radio spectrum of a source from Kuhr's catalog. 3Cnnn or hhmm+-ddd [0123 [+-lpek] fr_min fr_max] . For example: 3C454.3 Enter | 2251+15 1 l Enter | 2251+15 1 p 1000 Enter . 3C454.3 1 -e 10 20000 Enter . Keys: l - linear fit, p - parabolic fit, +/-e lin + exp(+-) fit; k - as in Kuhr's 81 . fr_min, fr_max - min/max frequencies for fitting (MHz) . ... Output appending files: 3Cnnn.fit or hhmm+dd.fit . ...

... The user can supply the position, brightness and label of a source. ... The estimated brightness in counts per second can be entered via the parameter rate ; the user source label via label . ... Note that all LABEL values are converted to upper case, hence a source with label given as `Fred' will conflict with a previous source supplied with label =`fred' since they each get translated to `FRED'. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... January 2006 resources . FROM THE January 2006 ISSUE . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

The HyperNews Linux KHG Discussion Pages . Forum: Other Sources of Information . ... In order to add another source to this page, simple respond to the page and mention the source. You can , if you like, simply type in the URL as your response--just click on the Respond button, enter the title of the web page you are connecting to in the Title box, click on the URL radiobutton for the format , and then type the URL into the large text window entitled Enter your response here: . ...