... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

Next: *imcalc* - Obtain a Up: Calibration Previous: Exposure Map . Background maps are provided by the standard processing for all ROSAT and Einstein instruments. For the PSPC and IPC these are in three standard bands: soft, hard, and broad (Table 6.2). ... N.B.: ROSAT PSPC background maps in SASS 5-6 or higher are generated by smoothing a source-subtracted, exposure corrected image (see the ROSAT Data Products Guide). ... imcalc* - Obtain a background subtracted image for ROSAT PSPC Data . ...

STIS Instrument Handbook for Cycle 24 . ... Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 24 > Chapter 12: Special Uses of STIS > 12.1 Slitless First-Order Spectroscopy . ... Slitless First-Order Spectroscopy . ... The use of a long slit ensures a clean separation of emission lines arising from different spatial features. ... Figure 4.8 shows an image of SN1987A observed using the 52X2 aperture, and as the source is smaller than the slit, this is effectively a slitless image. ...

... rgsspectrum creates an OGIP-compliant spectrum of counts for a single RGS exposure. ... background-corrected source spectrum . ... Note that although the spatial selection region for the background spectrum is not source-specific, the energy selection region is source-specific, and for this reason the background spectrum is technically source-specific. ... The above description of the BACKSCAL column applies only to Spectroscopy mode data; in HTR mode this column has nothing to do with exposure. ...

... We present a simple, effective technique that allows the contemporary spectroscopy of all the objects, up to a limiting magnitude, contained in a 100 arcmin 2 field. ... For this reason, we have developed a technique, that allows the simultaneous spectroscopy of all the objects included in a square field of view with 10 side, using the widely used FOSC-type optical spectrometer and camera focal-plane instruments. ... Thus the flux calibration of the slitless spectra was also straightforward. ...

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. ... This was not corrected in the figure shown in Appendix A. HS1214+3801 : This is seemingly a supergiant H II -region at the very rim of the nearby edge-on disc galaxy (SA(s)cd) NGC 4244 (V hel = 224 kms -1 and B T =10.88). ... To check this option one needs a detailed map of the NGC 4244 velocity field including HS 1214+3801. ...

... Astrophysics Group . ... Integration of the NIRSpec instrument . ... SKA AAVS0 array . ... One of the major milestones for the James Webb Space Telescope (JWST) has been, in September 2013, the completion by ESA of NIRSpec, the first multi-object spectrograph to be operated in space. ... Cambridge, and in particular the Cavendish Astrophysics Group and the Kavli Institute for Cosmology, is heavily involved in NIRSpec by hosting one of the Instrument Science Team members (R. Maiolino). ...

... Science . ... Science Users Information > Science Publications > Science Announcements > GRAVITY VLTI Instrument Under Integration on Paranal . ... Observing Facilities . ... Paranal Facilities . ... Observing with ESO Telescopes . ... Science Archive Facility . ... The VLTI 2nd generation instrument GRAVITY provides a four way beam combination facility with laser metrology for micro-arcsecond astrometry and high resolution imaging and spectroscopy in the K -band, described in Eisenhauer et al 2011 ...

APO/GIFS Instrument Factsheet The Goddard imager and Integral Field Spectrograph (GIFS) has recently been commissioned on the APO 3.5 m telescope. This factsheet presents a high level overview of the GIFS instrument. ... GIFS Imaging The GIFS imaging mode is used for imaging science and target acquisition for the IFS mode. ... Imaging Mode pixel scale: 0.168"/pixel · Comparison to Other APO 3.5m instruments: The GIFS field of view is smaller than SPICAM, but the filter set is far more extensive. ...

Next: The Transmission Gratings Up: The Instruments Previous: The Instruments . ... A conventional cross-grid charge detector reads out the photo-induced charge cloud and the electronics determine an arrival time to 16s, and the position with a resolution of about 18 m or 0.37 arcsec. ... The Massachusetts Institute of Technology's Center for Space Research, in collaboration with Lincoln Laboratories, developed the detector system and manufactured the CCDs; Lockheed-Martin integrated the instrument. ...

... We present a simple, e#ective technique that allows the con­ temporary spectroscopy of all the objects, up to a limiting magnitude, contained in a # 100 arcmin 2 field. This technique makes possible the immediate and unambiguous identification of peculiar objects included in the field. ... We show that this technique should also be quite useful in emission line and WR star surveys, and illustrate the software procedures devel­ oped to make the wavelength and flux calibration of these spectra. ...

... Polish scientists at the Space Research Centre, Polish Academy of Sciences, in Wroclaw, south-west Poland, have constructed an instrument called SphinX (short for Solar PHotometer In X-rays), which is an X-ray spectrophotometer, that will obtain spectra in the energy range 0.5--15 keV in 256 energy channels with frequency of up to 100 times a second. ... SphinX is part of a package of instruments known as TESIS (PI Prof. Sergei Kuzin, Lebedev Institute, Moscow). ... Space Research Centre, . ...

First light from the Superconducting Integrated Receiver on board Terahertz limb sounder TELIS P. Yagoubova, G. de Langea, R. Hoogeveena, A. de Langea and V. Kosheletsb a Netherlands Institute for Space Research, SRON, the Netherlands b Institute of Radio Engineering and Electronics, IREE, Russia Abstract-- We present the flight configuration and performance of the Superconducting Integrated Receiver (SIR) channel on the TELIS instrument (Terahertz and Submm Limb Sounder). ...

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

... 4.85 GHz, Condon et al 1989 (300 foot telescope, Greenbank) 2 Observation setup · Backend: Digital Continuum Receiver (DCR) at GBT · S-band - chose a bandwidth not contaminated by RFI = central frequency=2.09625 GHz, band width = 12.5 MHz · Observations : 1:30 - 6:00 am, July 12 3 Observation setup · Backend: Digital Continuum Receiver (DCR) at GBT · S-band - chose a bandwidth not contaminated by RFI = central frequency=2.09625 GHz, band width = 12.5 MHz · ...

... I.A. Karpov, E.D. Shoo 'New equipment for microwave electric field visualization' Review of Scientific Instruments, Vol. 83, Iss. 7, 074704 (2012) ... top . G.V. Strukov, G.K. Strukova, E.D. Shoo 'An experimental setup for obtaining metallic multilayer coatings with layers of nanometer thickness' Instruments and Experimental Techniques, Vol. 52, Iss. 5, 727-730 (2009) ... top ... top . ...

... GSAOI Home . Instrument . ... The Gemini South Adaptive Optics Imager (GSAOI) is a near-infrared adaptive optics camera that will be used with the Multi-Conjugate Adaptive Optics (MCAO) system on the Gemini South 8-m telescope . ... Gemini's major instrumentation goal is to develop its Multi-Conjugate Adaptive Optics (MCAO) system for scientific use on Gemini South. ... Existing adaptive optics systems use a single natural guide star or artifical laser guide star to measure this image blur. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Coronado€о Solar . ... Spotting Scopes . ...