Experience with the Hubble Space Telescope: Twenty Years
... navigation (RSUs), interferometric nulling (FGSs), and star field matching (FHSTs). Power is provided by a pair of large rotatable solar arrays, which also charge 6 batteries for power during orbital night. Combinations of passive and active thermal control provide careful management of the environm ...
... navigation (RSUs), interferometric nulling (FGSs), and star field matching (FHSTs). Power is provided by a pair of large rotatable solar arrays, which also charge 6 batteries for power during orbital night. Combinations of passive and active thermal control provide careful management of the environm ...
Signals from the Beginnings of the World - Max-Planck
... tillate.” Light-sensitive photo-multiplier tubes convert this scintillation light into an electrically usable signal. The central GBM board computer processes this signal to derive an initial and still crude arrival direction. “This is then transmitted to both the LAT instrument and the ground stati ...
... tillate.” Light-sensitive photo-multiplier tubes convert this scintillation light into an electrically usable signal. The central GBM board computer processes this signal to derive an initial and still crude arrival direction. “This is then transmitted to both the LAT instrument and the ground stati ...
Mission to Antartic
... But this seems to present higher costs in term of power (Watt on total budget) and weight (Kilograms that can be loaded on the telescope) ...
... But this seems to present higher costs in term of power (Watt on total budget) and weight (Kilograms that can be loaded on the telescope) ...
Chandra News March 2005 Published by the Chandra X-ray Center (CXC)
... Uhuru) to be launched in 1966 and a mission featuring a 1.2meter diameter, 10-meter focal length, grazing-incidence X-ray telescope mission to be launched in 1968.5. The additional 30 years that it took to accomplish this are an unfortunate testament to the challenges one faces in accomplishing majo ...
... Uhuru) to be launched in 1966 and a mission featuring a 1.2meter diameter, 10-meter focal length, grazing-incidence X-ray telescope mission to be launched in 1968.5. The additional 30 years that it took to accomplish this are an unfortunate testament to the challenges one faces in accomplishing majo ...
Increased Thermal Background for the post-NCS NICMOS
... Cycle 11 Calibration Plan Parallel observations in NIC3:F222m, NIC2: F222m & F237M were crafted to re-measure the thermal background for cycles 11 and beyond -See proposals 9269 and 9702 ...
... Cycle 11 Calibration Plan Parallel observations in NIC3:F222m, NIC2: F222m & F237M were crafted to re-measure the thermal background for cycles 11 and beyond -See proposals 9269 and 9702 ...
Galileo
... movement of a suspended weight. His first thoughts about the pendulum were when he noticed that as a breeze rolled in, a chandelier rocked back and forth. When the breeze stopped, the chandelier continued to rock. The pendulum was first used for recording someone’s pulse, and for the metronome, whic ...
... movement of a suspended weight. His first thoughts about the pendulum were when he noticed that as a breeze rolled in, a chandelier rocked back and forth. When the breeze stopped, the chandelier continued to rock. The pendulum was first used for recording someone’s pulse, and for the metronome, whic ...
Document
... First official campaign: Pluto on Saturday, May 4, 2013 Join the RECON listserve (contact [email protected]) Participate in local RECON star parties and astronomy activities ...
... First official campaign: Pluto on Saturday, May 4, 2013 Join the RECON listserve (contact [email protected]) Participate in local RECON star parties and astronomy activities ...
09 03 07 Logic Outline - The National Academies of Sciences
... General purpose telescopes, which have to meet a wide range of requirements, tend to be more expensive than dedicated telescopes to purchase, and certainly are more expensive to operate and maintain. The initial cost of a general purpose telescope at a major observatory, while it can be considerable ...
... General purpose telescopes, which have to meet a wide range of requirements, tend to be more expensive than dedicated telescopes to purchase, and certainly are more expensive to operate and maintain. The initial cost of a general purpose telescope at a major observatory, while it can be considerable ...
Reflecting vs Refracting
... than equivalent celestial telescopes. The cleanability can be improved by using a hard overcoating. In such a case, silver should be considered as the mirror’s material as its higher reflectivity would reduce mirror heating and therefore seeing. Though overcoatings are more difficult to strip and re ...
... than equivalent celestial telescopes. The cleanability can be improved by using a hard overcoating. In such a case, silver should be considered as the mirror’s material as its higher reflectivity would reduce mirror heating and therefore seeing. Though overcoatings are more difficult to strip and re ...
Uses of lenses
... Imaging: transparent vs. scattering objects • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
... Imaging: transparent vs. scattering objects • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
TAL
... going into active optics control, using output from AGW to more accurately determine position of M2. Useful publishable discovery: when coma is tipped out on-axis, one of the two nodes of binodal astigmatism is also zero for this field point. Determined that A-scope is in need of calibration at arou ...
... going into active optics control, using output from AGW to more accurately determine position of M2. Useful publishable discovery: when coma is tipped out on-axis, one of the two nodes of binodal astigmatism is also zero for this field point. Determined that A-scope is in need of calibration at arou ...
Mysterious transient objects - NCRA
... •Accretion disk around the black hole creates jets •GRBs are collimated. • All GRBs extragalactic • Some GRBs associated with supernovae (GRB980425/SN1998bw, GRB030329/SN2003dh etc.) • Dedicated instruments (BATSE, BeppoSax, Swift) • These GRBs last for few seconds • For longer duration in lower ene ...
... •Accretion disk around the black hole creates jets •GRBs are collimated. • All GRBs extragalactic • Some GRBs associated with supernovae (GRB980425/SN1998bw, GRB030329/SN2003dh etc.) • Dedicated instruments (BATSE, BeppoSax, Swift) • These GRBs last for few seconds • For longer duration in lower ene ...
Modeling the Spectral Energy Distributions and Variability
... … another one, observed Energy equivalent to the entire mass by us with the MDM 1.3 m of the sun (E = mc2), converted into gamma-rays in just a few seconds! telescope on Kitt Peak! ...
... … another one, observed Energy equivalent to the entire mass by us with the MDM 1.3 m of the sun (E = mc2), converted into gamma-rays in just a few seconds! telescope on Kitt Peak! ...
Telescope Instruction Manual
... moons. This is one of the most satisfying objects in the sky to see simply because it looks like it does in pictures. Imagine seeing what you’ve seen in textbooks or NASA images from your backyard! Jupiter—The largest planet in our solar system is spectacular. Most noted features are its dark stripe ...
... moons. This is one of the most satisfying objects in the sky to see simply because it looks like it does in pictures. Imagine seeing what you’ve seen in textbooks or NASA images from your backyard! Jupiter—The largest planet in our solar system is spectacular. Most noted features are its dark stripe ...
Astronomical Observing Techniques Lecture 3: Eyes to the Skies
... ALMA in Chile – 50 dishes (12m each) at 5000m altitude 400µm – 3mm (720 GHz – 84GHz) ...
... ALMA in Chile – 50 dishes (12m each) at 5000m altitude 400µm – 3mm (720 GHz – 84GHz) ...
The Mystery of Gamma Ray Bursts
... seconds. An interesting event was observed by IBAS in 2004, when GRB 041219A recorded one of the brightest explosions ever. Polarization of light from these events is related to the structure of their magnetic fields, so analysis of such big bursts allows astronomers to theorise about the causes of ...
... seconds. An interesting event was observed by IBAS in 2004, when GRB 041219A recorded one of the brightest explosions ever. Polarization of light from these events is related to the structure of their magnetic fields, so analysis of such big bursts allows astronomers to theorise about the causes of ...
4. Top level requirements
... field observations can be carried out) need to be reflected in the top level requirements (to avoid the risk of setting stringent level 1 requirements for capabilities of the telescope that cannot be used). ...
... field observations can be carried out) need to be reflected in the top level requirements (to avoid the risk of setting stringent level 1 requirements for capabilities of the telescope that cannot be used). ...
Variable Star Spectroscopy 2008
... out there (including the complete drawings for the LHIRES) but if you do go this route, make sure you design in structural stability, ease of use and some means of guiding the star on a 20um wide slit – not trivial tasks but essential if you are going to end up with an instrument which you can use y ...
... out there (including the complete drawings for the LHIRES) but if you do go this route, make sure you design in structural stability, ease of use and some means of guiding the star on a 20um wide slit – not trivial tasks but essential if you are going to end up with an instrument which you can use y ...
No. 2 - Society for Astronomical Sciences
... are likely to appear in upcoming publications about the eruption. Olivier Thizy presented a practical – and ongoing – example of pro-am collaboration in spectroscopy focused on the Be stars. These are hot “B” stars whose spectral lines change from emission to absorption as the star cycles. Amateur r ...
... are likely to appear in upcoming publications about the eruption. Olivier Thizy presented a practical – and ongoing – example of pro-am collaboration in spectroscopy focused on the Be stars. These are hot “B” stars whose spectral lines change from emission to absorption as the star cycles. Amateur r ...
Uses of lenses - TAMU E.C.E. DEPT.
... Imaging: transparent vs. scattering objects • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
... Imaging: transparent vs. scattering objects • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
3-DIMENSIONAL SPECTROSCOPIC-TOMOGRAPHY OF BIOLOGICAL MEMBRANE BY THE IMAGING-TYPE 2-D FOURIER SPECTROSCOPY
... Near-infrared rays are also used for the finger vein authentication reader system. So, the penetrated rays are diffused in biologic membrane. However, the finger vein authentication reader system uses this diffusion of light in a positive manner, as shown in Fig. 3. If near-infrared rays penetrate t ...
... Near-infrared rays are also used for the finger vein authentication reader system. So, the penetrated rays are diffused in biologic membrane. However, the finger vein authentication reader system uses this diffusion of light in a positive manner, as shown in Fig. 3. If near-infrared rays penetrate t ...
XMM-Newton
The XMM-Newton, also known as the X-ray Multi-Mirror Mission and the High Throughput X-ray Spectroscopy Mission, is an orbiting X-ray observatory launched by ESA in December 1999 on an Ariane 5 rocket. It is named in honor of Sir Isaac Newton. The telescope was placed in a very eccentric 48 hour elliptical orbit at 40°; at its apogee it is nearly 114,000 kilometres (71,000 mi) from Earth, while the perigee is only 7,000 kilometres (4,300 mi).