FOS/BLUE Wavelength-Zeropoint Correction Procedure Summary: A significant time-dependent systematic shift of up to 7 quarter-stepped pixels (1.75 diodes) in the zero-point of the FOS/BL wavelength scale has been confirmed in FOS Instrument Science Report (ISR) CAL/FOS-149 (Rosa, Kerber, and Keyes). ... Figures 1 and 2 (PDF - 14 Kbytes) illustrate the magnitude of the observed shifts and the effectiveness of the quick-fix algorithm provided here. ... Obtain the FOS ISR: CAL/FOS-149 (PDF - 53 Kbytes) . ...
... 172, Astronomical Data Analysis Software and Systems VIII, eds. D. M. Mehringer, R. L. Plante, & D. A. Roberts (San Francisco: ASP), 395 . ... We have investigated the internal zero-points of the HST's Faint object spectrograph (FOS) on-orbit wavelength calibration between 1990 (launch) and 1997 (de-commissioning). ... For BLUE systematic shifts of the zero-points are present, which amount to a maximum offset of 7 pixels (1.75 diodes) over the entire period. ...
АНОНС НАУЧНЫХ КОНФЕРЕНЦИЙ 1998-99 гг. ... An AAS Electronic Announcement Dear Colleague: NASA has approved development of a Wide Field Camera 3 (WFC3) for installation in the HST on the 2002 Servicing Mission. A Scientific Oversight Committee (SOC) is being established to ensure that the broad interests of the scientific community are represented in the development of WFC3. The primary task of the SOC will be to advise the HST Project and STScI in all areas of scientific performance of WFC3. ...
... 813Stocke IX/15 Einstein EMSS Survey (Gioia+ 1990, Stocke+ 1991) ============================================================================ The EINSTEIN Observatory Extended Medium-Sensitivity Survey (EMSS) Gioia I.M., Maccacaro T., Schild R.E., Wolter A. =1990ApJS.. ... This paper presents the results of the analysis of the X-ray data and the optical identification for the Einstein Observatory Extended Medium-Sensitivity Survey (EMSS). ... The cts_ext column gives the net extended counts. ...
... Галактика IC2574 . Alpha (03-Jan-1998) . ... Поле (угл.мин.) . ... Вернуться в статью " Галактика IC2574 ". Публикации с ключевыми словами: группа галактик - ближайшие галактики - M81 - группа M81 - IC 2574 - БТА . Публикации со словами: группа галактик - ближайшие галактики - M81 - группа M81 - IC 2574 - БТА . ... Яркая спиральная галактика M81: вид в телескоп Хаббла . Яркая спиральная галактика M81 в ультрафиолете: вид в телескоп Galex . ... Группа галактик Хиксон 44 . ...