Spear, Ultraviolet telescope satellite |
Spear, Ultraviolet telescope satellite |
Jan 28 2006, 07:30 PM
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#1
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
To quote from Microcom's Space Newsfeed for Spetember 28, 2003:
http://www.spacenewsfeed.co.uk/2003/28September2003.html BilSat-1, KAISTSat-4, Larets, Mozhayets-4, NigeriaSat-1 and UK-DMC Launched: 27 September 2003 Site: Plesetsk Cosmodrome, Russia Launcher: Kosmos 3M International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: BilSat-1 Owner: Tubitak-ODTU Bilten (Turkey) Contractor: Surrey Satellite Technology International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: KAISTSat-4 Contractor: Korea Advanced Institute of Science & Technology (KAIST) International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: Larets International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: Mozhayets-4 International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: NigeriaSat-1 Owner: National Space Research & Development Agency (Nigeria) Contractor: Surrey Satellite Technology International Number: 2003-042? Orbit: LEO, apogee: 681 km, perigee: 664 km: inclination: 98.2° Name: UK-DMC Owner: British National Space Centre (BNSC) Contractor: Surrey Satellite Technology This Kosmos 3M launch placed six microsatellites into LEO. Three of the satellites launched (BilSat-1, NigeriaSat-1 and UK-DMC) will form part of the Disaster Monitoring Constellation. Each satellite has a mass of about 100 kg. The first satellite in the constellation, AlSAT-1, was launched last November and is now fully operational. KAISTSat-4 will carry the SPEAR (Spectroscopy of Plasma Evolution from Astrophysical Radiation) ultraviolet telescope which will measure the glow over the whole sky from gas between the stars that has been heated by supernova blast waves, blazing hot stars and colliding interstellar clouds. The satellite will also carry other experiments to measure energetic particles bombarding the Earth's atmosphere and causing auroras. SPEAR also will work in conjunction with these experiments by looking downward to capture the auroral ultraviolet emissions. SPEAR will gaze away from the sun and, during the course of a year, steadily scan a thin wedge of the sky from north to south, moving one degree each day to complete a full-sky map in the far ultraviolet. For the second year, SPEAR will concentrate on particularly fascinating features in the sky that were identified in the all-sky survey. -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Jan 28 2006, 07:32 PM
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#2
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Paper: astro-ph/0601583
Date: Thu, 26 Jan 2006 01:14:24 GMT (594kb) Title: Far-ultraviolet Observations of the North Ecliptic Pole with SPEAR Authors: Eric J. Korpela (1), Jerry Edelstein (1), Julia Kregenow (1), Kaori Nishikida (1), Kyoung-Wook Min (2), Dae-Hee Lee (2,3), Kwangsun Ryu (2), Wonyong Han (3) Uk-Won Nam (3), Jang-Hyun Park (3) ((1) Space Sciences Laboratory, University of California, Berkeley, (2) Korea Advanced Institute of Science and Technology, Daejeon, Korea, (3) Korea Astronomy and Space Science Institute, Daejeon, Korea) Comments: 5 pages, 3 figures, Accepted for publication in ApJ Letters \\ We present SPEAR/FIMS far-ultraviolet observations near the North Ecliptic Pole. This area, at b~30 degrees and with intermediate HI column, seems to be a fairly typical line of sight that is representative of general processes in the diffuse ISM. We detect a surprising number of emission lines of many elements at various ionization states representing gas phases from the warm neutral medium (WNM) to the hot ionized medium (HIM). We also detect fluorescence bands of H2, which may be due to the ubiquitous diffuse H2 previously observed in absorption. \\ ( http://arXiv.org/abs/astro-ph/0601583 , 594kb) Paper: astro-ph/0601584 Date: Thu, 26 Jan 2006 02:28:54 GMT (624kb) Title: Far-UV Observations of a Thermal Interface in the Orion-Eridanus Superbubble Authors: J. Kregenow, J. Edelstein, E. Korpela, B. Welsh, C. Heiles, K. Ryu, K. Min, Y. Lim, I. Yuk, H. Jin, K. Seon Comments: 4 pages, 4 figures Accepted to ApJLetters \\ Diffuse far-UV emission arising from the edge of the Orion-Eridanus superbubble was observed with the SPEAR imaging spectrometer, revealing numerous emission lines arising from both atomic species and H2. Spatial variations in line intensities of CIV, SiII, and OVI, in comparison with soft X-ray, H-alpha and dust data, indicate that these ions are associated with processes at the interface between hot gas inside the bubble and the cooler ambient medium. Thus our observations probe physical conditions of an evolved thermal interface in the ISM. \\ ( http://arXiv.org/abs/astro-ph/0601584 , 624kb) -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Jan 28 2006, 07:35 PM
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#3
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Paper: astro-ph/0601585
Date: Thu, 26 Jan 2006 02:33:09 GMT (803kb) Title: Morpho-kinematic modeling of gaseous nebulae with SHAPE Authors: Wolfgang Steffen, Jose Alberto Lopez Comments: 7 pages, 5 figures, accepted for publication in RevMexAA, some figures are low resolution for packing adequate for the arXive (see http://www.astrosen.unam.mx/~wsteffen for highres version.) \\ We present a powerful new tool to analyse and disentangle the 3-D geometry and kinematic structure of gaseous nebulae. The method consists in combining commercially available digital animation software to simulate the 3-D structure and expansion pattern of the nebula with a dedicated, purpose built rendering software that produces the final images and long slit spectra which are compared to the real data. We show results for the complex planetary nebulae NGC 6369 and Abell 30 based on long slit spectra obtained at the San Pedro Martir observatory. \\ ( http://arXiv.org/abs/astro-ph/0601585 , 803kb) ------------------------------------------------------------------------------ \\ Paper: astro-ph/0601586 Date: Thu, 26 Jan 2006 17:52:16 GMT (207kb) Title: Far Ultraviolet Spectral Images of the Vela Supernova Remnant Authors: K. Nishikida, J. Edelstein, E. J. Korpela, R. Sankrit, W. M. Feuerstein, K. W. Min, J-H. Shinn, D-H. Lee, I-S. Yuk, H. Jin, K-I. Seon Comments: Accepted by ApJL \\ We present far-ultraviolet (FUV) spectral-imaging observations of the Vela supernova remnant (SNR), obtained with the Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR) instrument, also known as FIMS. The Vela SNR extends 8 degrees in the FUV and its global spectra are dominated by shock-induced emission lines. We find that the global FUV line luminosities can exceed the 0.1-2.5 keV soft X-ray luminosity by an order of magnitude. The global O VI:C III ratio shows that the Vela SNR has a relatively large fraction of slower shocks compared with the Cygnus Loop. \\ ( http://arXiv.org/abs/astro-ph/0601586 , 207kb) ------------------------------------------------------------------------------ \\ Paper: astro-ph/0601587 Date: Thu, 26 Jan 2006 05:12:50 GMT (417kb) Title: The Spectroscopy of Plasma Evolution from Astrophysical Radiation Mission Authors: J. Edelstein, K. W. Min, W. Han, E. J. Korpela, K. Nishikida, B.Y. Welsh, C. Heiles, J. Adolfo, M. Bowen, W.M. Feuerstein, K. McKee, J.-T. Lim, K. Ryu, J.-H. Shinn, U.-W. Nam, J.-H. Park, I.-S. Yuk, H. Jin, K.I Seon, D.H. Lee, E. Sim \\ The Spectroscopy of Plasma Evolution from Astrophysical Radiation (or the Far-ultraviolet Imaging Spectrograph) instruments, flown aboard the STSAT-1 satellite mission, have provided the first large-area spectral mapping of the cosmic far ultraviolet (FUV, lambda 900-1750 Ang) background. We observe diffuse radiation from hot (10^4 to 10^6 K) and ionized plasmas, molecular hydrogen, and dust scattered starlight. These data provide for the unprecedented detection and discovery of spectral emission from a variety of interstellar environments, including the general medium, molecular clouds, supernova remnants, and super-bubbles. We describe the mission and its data, present an overview of the diffuse FUV sky's appearance and spectrum, and introduce the scientific findings detailed later in this volume. \\ ( http://arXiv.org/abs/astro-ph/0601587 , 417kb) ------------------------------------------------------------------------------ \\ Paper: astro-ph/0601588 Date: Thu, 26 Jan 2006 06:01:05 GMT (133kb) Title: The SPEAR Instrument and On-Orbit Performance Authors: Jerry Edelstein, Eric Korpela, Joe Adolfo, Mark Bowen, Michael Feuerstein, Jeffrey Hull, Sharon Jelinsky, Kaori Nishikida, Ken McKee, Peter Berg, Ray Chung, Jorg Fischer, Kyoung-Wook Min, Seung-Han Oh, Jin-Guen Rhee, Kwangsun Ryu, Jong-Ho Shinn, Wonyong Han, Ho Jin, Dae-Hee Lee, Uk-Won Nam, Jang-Hyun Park, Kwang-Il Seon, In-Soo Yuk \\ The SPEAR (or 'FIMS') instrumentation has been used to conduct the first large-scale spectral mapping of diffuse cosmic far ultraviolet (FUV, 900-1750 AA) emission, including important diagnostics of interstellar hot (10^4 K - 10^6 K) and photoionized plasmas, H_2, and dust scattered starlight. The instrumentation's performance has allowed for the unprecedented detection of astrophysical diffuse far UV emission lines. A spectral resolution of 550 and an imaging resolution of 5' is achieved on-orbit in the Short (900 - 1175 AA) and Long (1335 - 1750 AA) bandpass channels within their respective 7.4 deg x 4.3' and 4.0 deg x 4.6' fields of view. We describe the SPEAR imaging spectrographs, their performance, and the nature and handling of their data. \\ ( http://arXiv.org/abs/astro-ph/0601588 , 133kb) Paper: astro-ph/0601590 Date: Thu, 26 Jan 2006 08:40:27 GMT (875kb) Title: Molecular Hydrogen Fluorescence in the Eridanus Superbubble Authors: K. Ryu, K. W. Min, J. W. Park, D. H. Lee, W. Han, U. W. Nam, J. H. Park, J. Edelstein, E. J. Korpela, K. Nishikida, and E. F. van Dishoeck Comments: 10 pages, 3 figures, apjl accepted \\ The first FUV (lambda lambda 1350-1750 A) spectral imaging observations of the Eridanus superbubble, obtained with the SPEAR/FIMS mission, have revealed distinct fluorescent emission from molecular hydrogen. In this study, the observed emission features were compared with those from a photo-dissociation region model with assumed illuminating stellar fields. The result showed rather high line ratios of I_{1580}/I_{1610}, which may imply the existence of high-temperature molecular clouds in the region. The H_2 fluorescence intensity showed a proportional correlation with H-alpha emission, indicating that the fluorescence and the recombination emission have similar physical origins. \\ ( http://arXiv.org/abs/astro-ph/0601590 , 875kb) -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Jan 28 2006, 07:47 PM
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#4
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Paper: astro-ph/0601615
Date: Thu, 26 Jan 2006 20:48:44 GMT (513kb) Title: SPEAR Far Ultraviolet Spectral Images of the Cygnus Loop Authors: Kwang-Il Seon, Wonyong Han, Uk-Won Nam, Jang-Hyun Park, Jerry Edelstein, Eric J. Korpela, Ravi Sankrit, Kyoung-Wook Min, Kwangsun Ryu, and Il-Joong Kim Comments: 13 pages, 3 figures, 1 table, accepted for publication in ApJL \\ We present far-ultraviolet (FUV) spectral images, measured at C IV 1550, He II 1640, Si IV+O IV] 1400, and O III] 1664, of the entire Cygnus Loop, observed with the Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR) instrument, also known as FIMS. The spatial distribution of FUV emission generally corresponds with a limb-brightened shell, and is similar to optical, radio and X-ray images. The features found in the present work include a ``carrot'', diffuse interior, and breakout features, which have not been seen in previous FUV studies. Shock velocities of 140-160 km/s is found from a line ratio of O IV] to O III], which is insensitive not only to resonance scattering but also to elemental abundance. The estimated velocity indicates that the fast shocks are widespread across the remnant. By comparing various line ratios with steady-state shock models, it is also shown that the resonance scattering is widespread. \\ ( http://arXiv.org/abs/astro-ph/0601615 , 513kb) -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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