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Title:
EUVE Science Retrospective: 8.5 Years in a Nutshell
Authors:
Cullison, J. L.; McDonald, K. E.; Stroozas, B. A.; Kinloch, B.; Howell, S. B.; Malina, R. F.
Affiliation:
AD(Center for EUV Astrophysics), AE(Planetary Science Institute), AF(Centre National de la Recherche Scientifique)
Journal:
American Astronomical Society Meeting 197, #115.01
Publication Date:
12/2000
Origin:
AAS
Abstract Copyright:
(c) 2000: American Astronomical Society
Bibliographic Code:
2000AAS...19711501C

Abstract

NASA's Extreme Ultraviolet Explorer (EUVE) is now in its eighth year of operation and though various campaigns are underway to extend the mission, it is expected that the satellite will take its last observations in January 2001. The EUVE Project has been a productive endeavor; it not only mapped the EUV sky in its first year of operation, but in subsequent years has allowed astronomers to break new ground in many areas of astrophysics.

This poster will review the history of EUVE science and provide a composite picture of the most significant, noteworthy, statistically interesting, and potentially dubious achievements.

This work is funded through NASA/UCB Cooperative Agreement NCC5-138.

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Title:
Preliminary Results of the EUVE Slew Survey: Aug 1993 - Feb 2000
Authors:
McDonald, K. E.; Christian, D. J.; Malina, R. F.
Affiliation:
AA(Center for EUV Astrophysics, University of California, Berkeley), AB(Space Telescope Science Institute), AC(Center for EUV Astrophysics, University of California, Berkeley)
Journal:
American Astronomical Society Meeting 196, #53.09
Publication Date:
05/2000
Origin:
AAS
Abstract Copyright:
(c) 2000: American Astronomical Society
Bibliographic Code:
2000AAS...196.5309M

Abstract

NASA's Extreme Ultraviolet Explorer (EUVE) spacecraft operates in low-earth orbit and consists of four telescopes -- three imaging "scanners" and the deep survey imager/spectrograph -- and covers bandpasses from about 70-760 Angstroms. Throughout the mission, EUVE has collected data while operating in different modes, from the All-Sky Survey when the spacecraft spun about its long axis at 0.2 degrees per second and captured data with the scanners, to inertially pointed observations when the spacecraft looks at specific astronomical targets using the deep survey imager/spectrograph. In addition, science data was often collected while the spacecraft was slewing from one pointed observation to the next, which has yielded a random "Slew Survey" of the sky with the imaging scanners and the deep survey instrument. We will discuss the EUVE Slew Survey data set, processing techniques, and potential problems associated with instrumental responses. We will also present preliminary skymaps and a list of possible EUVE sources detected.

This work was funded through NASA/UCB Cooperative Agreement NCC5-138.

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Title:
The EUVE Mission at UCB: Squeezing More From Less
Authors:
Stroozas, B. A.; Cullison, J. L.; McDonald, K. E.; Nevitt, R.; Malina, R. F.
Affiliation:
AE(Center for EUV Astrophysics, University of California, Berkeley)
Journal:
American Astronomical Society Meeting 196, #32.02
Publication Date:
05/2000
Origin:
AAS
Abstract Copyright:
(c) 2000: American Astronomical Society
Bibliographic Code:
2000AAS...196.3202S

Abstract

With 8 years on orbit, and over three years in an outsourced mode at U.C. Berkeley (UCB), NASA's Extreme Ultraviolet Explorer (EUVE) continues to be a highly mature and productive scientific mission. The EUVE satellite is extremely stable and exhibits little degradation in its original scientific capabilities, and science data return continues to be at the >99% level. The Project's very small, dedicated, innovative, and relatively cheap ( \$1 million/year) support team at UCB continues to validate the success of NASA's outsourcing "experiment" while providing a very high science-per-dollar return on NASA's investment with no significant additional risk to the flight systems.

The EUVE mission still has much more to offer in terms of important and exciting scientific discoveries as well as mission operations innovations. To highlight this belief the EUVE team at UCB continues to find creative ways to do more with less -- to squeeze the maximum out of available funds -- in NASA's "cheaper, better, faster" environment.

This paper provides an overview of the EUVE mission's past, current, and potential future efforts toward automating and integrating its multi-functional data processing systems in proposal management, observation planning, mission operations and engineering, and the processing, archival, and delivery of raw telemetry and science data products. The paper will also discuss the creative allocation of the Project's few remaining personnel resources who support both core mission functions and new innovations, while at the same time minimizing overall risk and stretching the available budget.

This work is funded through NASA/UCB Cooperative Agreement NCC5-138.

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Title:
``Big Bang" for NASA's Buck: Nearly Three Years of EUVE Mission Operations at UCB
Authors:
Stroozas, B. A.; Nevitt, R.; McDonald, K. E.; Cullison, J.; Malina, R. F.
Affiliation:
AE(Center for EUV Astrophysics, UC, Berkeley)
Journal:
American Astronomical Society Meeting 195, #82.05
Publication Date:
12/1999
Origin:
AAS
Abstract Copyright:
(c) 1999: American Astronomical Society
Bibliographic Code:
1999AAS...195.8205S

Abstract

After over seven years in orbit, NASA's Extreme Ultraviolet Explorer (EUVE) satellite continues to perform flawlessly and with no significant loss of science capabilities. EUVE continues to produce important and exciting science results and, with reentry not expected until 2003-2004, many more such discoveries await. In the nearly three years since the outsourcing of EUVE from NASA's Goddard Space Flight Center, the small EUVE operations team at the University of California at Berkeley (UCB) has successfully conducted all aspects of the EUVE mission -- from satellite operations, science and mission planning, and data processing, delivery, and archival, to software support, systems administration, science management, and overall mission direction. This paper discusses UCB's continued focus on automation and streamlining, in all aspects of the Project, as the means to maximize EUVE's overall scientific productivity while minimizing costs. Multitasking, non-traditional work roles, and risk management have led to expanded observing capabilities while achieving significant cost reductions and maintaining the mission's historical 99 return. This work was funded under NASA Cooperative Agreement NCC5-138.

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Title:
EUVE Pointed Observations of the beta Canis Majoris Interstellar Tunnel
Authors:
Welsh, B. Y.; Vallerga, J. V.; McDonald, K.
Affiliation:
AC(Eureka Scientific, 2452 Delmer Street, Oakland, CA 94602; eureka@netcom.com, bwelsh@ssl.berkeley.edu, jvv@cea.berkeley.edu, kelley@cea.berkeley.edu)
Journal:
The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 749, pp. 827-830. (PASP Homepage)
Publication Date:
07/1998
Origin:
PASP
PASP Keywords:
ISM: BUBBLES, ISM: GENERAL
Abstract Copyright:
The Astronomical Society of the Pacific
Bibliographic Code:
1998PASP..110..827W

Abstract

We present results from extended pointings of the EUVE scanner telescopes in the direction of the rarefied interstellar tunnel toward the star beta CMa. Five sources were detected, each of which subsequently proved to be caused by ultraviolet leaks in the EUVE short-wavelength filters. Our initial expectation was to detect many new EUV sources in the 80 deg^2 region of very low neutral interstellar hydrogen column density covered by these extended pointings. However, no EUV sources were detected. This result is consistent with a source of short-wavelength EUV opacity, providing indirect evidence for the presence of highly ionized (coronal) gas at distances of more than 5 pc in the line of sight toward this region of anomalous interstellar absorption.

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Title:
The Extreme Ultraviolet Explorer Public Right Angle Program
Authors:
McDonald, K.; Craig, N.; Olson, E.; Christian, C. A.
Journal:
Astrophysics in the extreme ultraviolet. Proceedings of colloquium no. 152 of the International Astronomical Union; held in Berkeley; California; March 27-30; 1995; Dordrecht: Kluwer Academic Publ.; |c1996; edited by Stuart Bowyer and Roger F. Malina, p.599
Publication Date:
00/1996
Origin:
ADS
Bibliographic Code:
1996aeu..conf..599M

Abstract

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Title:
EUV Constraints on Models of Low Mass X-ray Binaries
Authors:
Christian, D. J.; Edelstein, J. E.; Mathioudakis, M.; McDonald, K.; Sirk, M. M.
Journal:
Astrophysics in the extreme ultraviolet. Proceedings of colloquium no. 152 of the International Astronomical Union; held in Berkeley; California; March 27-30; 1995; Dordrecht: Kluwer Academic Publ.; |c1996; edited by Stuart Bowyer and Roger F. Malina, p.425
Publication Date:
00/1996
Origin:
ADS
Bibliographic Code:
1996aeu..conf..425C

Abstract

Not Available

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Title:
Activity versus rotation in the extreme ultraviolet.
Authors:
Mathioudakis, M.; Fruscione, A.; Drake, J. J.; McDonald, K.; Bowyer, S.; Malina, R. F.
Journal:
Astronomy and Astrophysics, v.300, p.775 (A&A Homepage)
Publication Date:
08/1995
Origin:
A&A via CDS; KNUDSEN
A&A Keywords:
STARS: CORONAE, STARS: ACTIVITY, STARS: ROTATION, STARS: LATE TYPE, ULTRAVIOLET: STARS
Abstract Copyright:
(c) 1995: Astronomy & Astrophysics
Bibliographic Code:
1995A&A...300..775M

Abstract

This paper presents extreme ultraviolet (EUV) fluxes for 74 main-sequence stars observed with the Extreme Ultraviolet Explorer (EUVE). The sample of stars was chosen on the basis of rotational period and includes 23 new EUV detections. These detections are in addition to the ROSAT WFC and EUVE catalogs and have increased the number of main-sequence stars detected in the extreme ultraviolet by ~12%. We present an activity-rotation relation in the EUV and show that in a sample of stars with different effective temperatures the Rossby number is a better parameter for describing the levels of EUV emission as compared to the rotational period. This is also known to be the case for the chromospheric emission. A comparison with the emission in the Mg II h and K lines shows that saturation in the EUV occurs in lower Rossby numbers than does chromospheric saturation, where saturation in X-rays occurs in the same Rossby numbers as in the EUV. The radiative losses in the EUV are comparable to the radiative losses in X-rays. The EUVE observations indicate that the low activity dM star Gl 685 has a cool corona with a characteristic temperature of <2.5x10^6^K. A large amount of the coronal radiative losses in low activity dwarfs is expected to emerge in EUV wavelengths.

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Title:
The Interstellar (7) Li/(6) Li Isotope Ratio Toward zeta OPH
Authors:
Hawkins, I.; Crawford, I.; Barlow, M.; Diego, F.; McDonald, K.; Sommers, J.
Affiliation:
AA(Eureka Scientific, Inc.; Univ. College, London; Univ. College, London; Univ. College, London; Eureka Scientific, Inc.; Eureka Scientific, Inc.)
Journal:
American Astronomical Society Meeting, 186, #35.01
Publication Date:
05/1995
Origin:
AAS
Abstract Copyright:
(c) 1995: American Astronomical Society
Bibliographic Code:
1995AAS...186.3501H

Abstract

The interstellar (7) Li/(6) Li isotope ratio is an important parameter which is governed by primordial nucleosynthesis during the Big Bang and by the chemical evolution of our Galaxy. Reported measurements of this isotope ratio in the interstellar medium thus far have included the following results: (7) Li/(6) Li ~ 38 toward zeta Oph (Ferlet and Dennefeld 1984); (7) Li/(6) Li=12.5+/- 3.8 toward rho Oph (Lemoine et.al. 1993); (7) Li/(6) Li=6.8+/- 1.6 toward zeta Oph (Meyer, Hawkins, and Wright 1993); (7) Li/(6) Li=5.5+/- 1.2 toward zeta Per (Meyer, Hawkins, and Wright 1993); (7) Li/(6) Li=8.6+/- 0.8 and (7) Li/(6) Li=1.4+/- 0.6 for two components derived through profile fitting toward zeta Oph (Lemoine, Ferlet, and Vidal-Madjar 1995). Except for the early measurement by Ferlet and Dennefeld, the values above are in general agreement within the error bars. These low values of this important isotope ratio are not predicted by models of Galactic chemical evolution which take into account various Li production mechanisms and also the differential destruction of both isotopes in stellar interiors (Meyer, Hawkins, and Wright 1994 and references therein). Such Galactic chemical evolution models predict that the (7) Li/(6) Li isotope ratio value should be greater than 12.5 (the solar value) by about a factor of two. All the above measurements have been carried out with resolutions of at best 1 km/s, or lambda /delta lambda ~ 3 times 10(5) . Despite the very high S/N ratio of the data which produced the above quoted measurements (4,000 -- 7,500 per pixel), the small separation of the lithium isotopic doublets makes it difficult to resolve individual components unless better resolution is achieved. We present ultra high resolution observations (lambda /delta lambda ~ 3 times 10(6) ) of the (7) Li/(6) Li isotope ratio toward zeta Oph, carried out with the Ultra High Resolution Facility (UHRF) and the Anglo-Australian Telescope.

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Title:
A volume-limited survey of High Galactic latitude planetary nebulae with the Extreme Ultraviolet Explorer
Authors:
Fruscione, Antonella; Drake, Jeremy J.; McDonald, Kelley; Malina, Roger F.
Affiliation:
AAUniv. of California, Berkeley, CA, US ABUniv. of California, Berkeley, CA, US ACUniv. of California, Berkeley, CA, US ADUniv. of California, Berkeley, CA, US
Journal:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 441, no. 2, p. 726-734 (ApJ Homepage)
Publication Date:
03/1995
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
EXTREME ULTRAVIOLET RADIATION, PLANETARY NEBULAE, SKY SURVEYS (ASTRONOMY), ULTRAVIOLET ASTRONOMY, ULTRAVIOLET EMISSION, B STARS, EXTREME ULTRAVIOLET EXPLORER SATELLITE, IMAGE ANALYSIS, INTERSTELLAR EXTINCTION, ULTRAVIOLET PHOTOMETRY, WHITE DWARF STARS
Bibliographic Code:
1995ApJ...441..726F

Abstract

We present the results of a complete survey, at extreme-ultraviolet (EUV) wavelengths (58-234 A), of the high Galactic latitude (absolute value of b greater than or = to 20 deg) planetary nebulae (PNs) with at least one determination of the distance within 1 kpc of the Sun. The sample comprises 27 objects observed during the Extreme Ultraviolet Explorer (EUVE) all-sky survey and represents the majority of PN likely to be accessible at EUV wavelengths. Six PNs (NGC 246, NGC 1360, K1-16, LoTr 5, NGC 4361, and NGC 3587) were detected in the shortest EUV band (58-174 A). A seventh PN (NGC 6853), not included in the sample, was also detected during the survey. The emission is consistent in all cases with that of a point source and therefore most probably originates from the PN central star. Accurate EUV count rates or upper limits in the two shorter EUVE bands (centered at approximately 100 and 200 A) are given for all the sources in the sample. NGC 4361 and NGC 3587 are reported here for the first time as sources of EUV radiation. As might be expected, attenuation by the interstellar medium dominates the PN distribution in the EUV sky.

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Title:
The World Wide Web: Cornerstone of the EUVE Science Archive
Authors:
McDonald, K.; Stroozas, B.; Antia, B.; Roberts, B.; Chen, K.; Craig, N.; Christian, C.
Affiliation:
AA(Center for EUV Astrophysics, University of California 2150 Kittredge Street, Berkeley, CA 94720--5030)
Journal:
Astronomical Data Analysis Software and Systems IV, ASP Conference Series, Vol. 77, 1995, R.A. Shaw, H.E. Payne, and J.J.E. Hayes, eds., p. 44.
Publication Date:
00/1995
Origin:
ADASS
Bibliographic Code:
1995adass...4...44M

Abstract

The Science Archive for the Extreme Ultraviolet Explorer (EUVE) satellite is using the World Wide Web (WWW) client/server software model as the cornerstone for the dissemination of EUVE archival material. A number of on-line services are available for accessing the large amounts of EUVE data that have been released publicly in the past year; additional services provide access to EUVE-related software and information. This paper outlines the current Archive WWW services and discusses plans for the future.

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Title:
Research Opportunities with the Public EUVE Archive
Authors:
Antia, B.; Stroozas, B.; Din, J.; McDonald, K.; Christian, C. A.; Malina, R. F.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 185, #41.07
Publication Date:
12/1994
Origin:
AAS
Abstract Copyright:
(c) 1994: American Astronomical Society
Bibliographic Code:
1994AAS...185.4107A

Abstract

NASA's highly successful Extreme Ultraviolet Explorer (EUVE) mission is nearing completion of its second cycle of guest observer (GO) observations. This orbiting observatory has opened a new window on the universe by being the first to examine the entire extreme ultraviolet (EUV) portion of the spectrum (60--760 Angstroms), doing so both photometrically and spectroscopically. The Center for EUV Astrophysics (CEA) at the University of California, Berkeley, is responsible for the archiving and dissemination of the raw and processed data products from the EUVE mission. This archive affords an unparalleled research opportunity by providing scientists with a new, unique, and rich set of astrophysical data. Covering a wide variety of celestial objects and classifications, the publicly available data include skymaps from the all-sky and deep surveys in four wavelength bands, catalogs of EUV sources, images and time-tagged photon event lists for detected objects (``pigeonholes''), and multi-channel spectral data sets. This extensive range of raw data and data products are supported by analysis software, calibration information, and documentation. In order to maximize the dissemination of EUVE archival material, CEA has implemented a World Wide Web (WWW) server that interfaces with the archive and serves most of the EUVE archival material via request forms which run processes locally at CEA.

The EUVE Archive further supports archive-based science with the advent of a Guest Investigator (GI) program. Similar to the existing one for GOs, the GI program allows external researchers to propose for and receive direct support from the CEA technical and scientific staff for particular programs of study conducted remotely or in residence. The GI program complements nicely the use of on-line WWW-based archive services, ensuring the widest possible use of EUVE data. This paper will show how this large and varied data set has enormous potential for all astrophysics researchers. This work has been supported by NASA contract NAS5-29298.

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Title:
Serendipitous EUV sources detected during the first year of the Extreme Ultraviolet Explorer right angle program
Authors:
McDonald, K.; Craig, N.; Sirk, M. M.; Drake, J. J.; Fruscione, A.; Vallerga, J. V.; Malina, R. F.
Affiliation:
AAUniversity of California, Berkeley, CA, US ABUniversity of California, Berkeley, CA, US ACUniversity of California, Berkeley, CA, US ADUniversity of California, Berkeley, CA, US AEUniversity of California, Berkeley, CA, US AFUniversity of California, Berkeley, CA, US AGUniversity of California, Berkeley, CA, US
Journal:
The Astronomical Journal (ISSN 0004-6256), vol. 108, no. 5, p. 1843-1853 (AJ Homepage)
Publication Date:
11/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL CATALOGS, B STARS, COMPANION STARS, EXTREME ULTRAVIOLET RADIATION, INTERSTELLAR MATTER, RADIATION SOURCES, SKY SURVEYS (ASTRONOMY), SPACEBORNE ASTRONOMY, STELLAR SPECTRA, ULTRAVIOLET ASTRONOMY, ULTRAVIOLET SPECTRA, ASTRONOMICAL PHOTOMETRY, ASTRONOMICAL SPECTROSCOPY, EXTREME ULTRAVIOLET EXPLORER SATELLITE, INTERGALACTIC MEDIA, ULTRAVIOLET SPECTROSCOPY, ULTRAVIOLET TELESCOPES
Bibliographic Code:
1994AJ....108.1843M

Abstract

We report the detection of 114 extreme ultraviolet (EUV; 58 - 740 A) sources, of which 99 are new serendipitous sources, based on observations made with the imaging telescopes on board the Extreme Ultraviolet Explorer (EUVE) during the Right Angle Program (RAP). These data were obtained using the survey scanners and the Deep Survey instrument during the first year of the spectroscopic guest observer phase of the mission, from January 1993 to January 1994. The data set consists of 162 discrete pointings whose exposure times are typically two orders of magnitude longer than the average exposure times during the EUVE all-sky survey. Based on these results, we can expect that EUVE will serendipitously detect approximately 100 new EUV sources per year, or about one new EUV source per 10 sq deg, during the guest observer phase of the EUVE mission. New EUVE sources of note include one B star and three extragalactic objects. The B star (HR 2875, EUVE J0729 - 38.7) is detected in both the Lexan/B (approximately 100 A) and Al/Ti/C (approximately 200 A) bandpasses, and the detection is shown not to be a result of UV leaks. We suggest that we are detecting EUV and/or soft x rays from a companion to the B star. Three sources, EUVE J2132+10.1, EUVE J2343-14.9, and EUVE J2359-30.6 are identified as the active galactic nuclei MKN 1513, MS2340.9-1511, and 1H2354-315, respectively.

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Title:
The Extreme Ultraviolet (EUV) Rotation-activity Relation for Late-Type Stars
Authors:
Mathioudakis, M.; Fruscione, A.; Drake, J. J.; McDonald, K.; Bowyer, S.; Malina, R. F.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 184, #05.20
Publication Date:
05/1994
Origin:
AAS
Abstract Copyright:
(c) 1994: American Astronomical Society
Bibliographic Code:
1994AAS...184.0520M

Abstract

We present results on an optically selected sample of 44 main sequence stars, including 18 EUV sources not previously reported, detected with the Extreme Ultraviolet Explorer (EUVE) satellite. The sample covers a broad range of spectral types (early F to late M) with known rotation periods from 0.4 days to 50 days. A comparison of the EUV fluxes with activity related parameters shows that the dynamo related Rossby number is the best parameter for describing the levels of coronal activity. This is in agreement with the conclusion of Noyes et al. (ApJ, 279,763) for the chromosphere. The saturated levels of coronal activity are discussed. This work has been supported by NASA contract NAS5-30180.

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Title:
Extreme Ultraviolet Explorer Bright Source List
Authors:
Malina, R. F.; Marshall, H. L.; Antia, B.; Christian, C. A.; Dobson, C. A.; Finley, D. S.; Fruscione, A.; Girouard, F. R.; Hawkins, I.; Jelinsky, P.; Lewis, J. W.; McDonald, J. S.; McDonald, K.; Patterer, R. J.; Saba, V. W.; Sirk, M.; Stroozas, B. A.; Vallerga, J. V.; Vedder, P. W.; Wiercigroch, A.; Bowyer, S.
Affiliation:
AAUniv. of California, Berkeley, CA, US ABUniv. of California, Berkeley, CA, US ACUniv. of California, Berkeley, CA, US ADUniv. of California, Berkeley, CA, US AEUniv. of California, Berkeley, CA, US AFUniv. of California, Berkeley, CA, US AGUniv. of California, Berkeley, CA, US AHUniv. of California, Berkeley, CA, US AIUniv. of California, Berkeley, CA, US AJUniv. of California, Berkeley, CA, US
Journal:
Astronomical Journal (ISSN 0004-6256), vol. 107, no. 2, p. 751-764 (AJ Homepage)
Publication Date:
02/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL CATALOGS, DWARF STARS, EXTREME ULTRAVIOLET RADIATION, LATE STARS, SKY SURVEYS (ASTRONOMY), SPACEBORNE ASTRONOMY, STELLAR SPECTRA, ULTRAVIOLET ASTRONOMY, ULTRAVIOLET SPECTRA, ASTRONOMICAL PHOTOMETRY, EXTREME ULTRAVIOLET EXPLORER SATELLITE, POINT SOURCES, ULTRAVIOLET TELESCOPES
Bibliographic Code:
1994AJ....107..751M

Abstract

Initial results from the analysis of the Extreme Ultraviolet Explorer (EUVE) all-sky survey (58-740 A) and deep survey (67-364 A) are presented through the EUVE Bright Source List (BSL). The BSL contains 356 confirmed extreme ultraviolet (EUV) point sources with supporting information, including positions, observed EUV count rates, and the identification of possible optical counterparts. One-hundred twenty-six sources have been detected longward of 200 A.

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Title:
Preliminary Results of the Extreme Ultraviolet Explorer Right Angle Program
Authors:
McDonald, K.; Craig, N.; Sirk, M. M.; Drake, J. J.; Malina, R. F.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 183, #78.03
Publication Date:
12/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...183.7803M

Abstract

During the guest observer phase of the EUVE Mission, data are being collected with the survey scanners and the Deep Survey Scanner. The EUVE Right Angle Program (RAP) involves the analysis of this data set and the coordination of possible simultaneous observations with ground based instruments. This data set consists of several discrete pointings performed at a much deeper level than the previous EUVE all-sky survey, although covering only a few percent of the sky. Analysis of this data set has detected a large number of previously undetected EUV sources. We present here a preliminary list of the sources observed during the EUVE Right Angle Program and compare properties of this list with properties of the EUVE Bright Source List.

This work has been supported by NASA contract NAS5--30180.

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Title:
EUVE Observations of Planetary Nebulae
Authors:
Fruscione, A.; Abbott, M.; Drake, J. J.; Dupuis, J.; Malina, R. F.; Mathioudakis, M.; McDonald, K.; Chu, K. C.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 183, #51.12
Publication Date:
12/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...183.5112F

Abstract

We present preliminary results of extreme ultraviolet observations (60--740 Angstroms) of a complete sample of planetary nebulae (PN) selected from the Strasbourg-ESO Catalog (Acker et al. 1992) and observed during the Extreme Ultraviolet Explorer (EUVE) all-sky survey.

Our selection criteria are focused on minimizing the impact of the interstellar absorption on the extreme ultraviolet observations, and our sample includes the 26 closest PN (distances <= 1 kpc) at high galactic latitude (|b|>= 20deg ). During the EUVE all-sky survey at least five PN in our sample (NGC 246, NGC 1360, K1-16, Lo Tr5, NGC 4361) were detected in the shortest band (58--174 Angstroms). The extreme ultraviolet emission originates in the central star. Upper limits in the four EUVE bands (centered at ~ 100, 200, 400, 600 Angstroms) are given for all the sources.

This work has been supported by NASA contract NAS5-30180.

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Title:
The EUVE bright source list
Authors:
Stroozas, B.; McDonald, K.; Antia, B.; McDonald, J.; Wiercigroch, A.
Affiliation:
AAUniv. of California, Berkeley, CA, US ABUniv. of California, Berkeley, CA, US ACUniv. of California, Berkeley, CA, US ADUniv. of California, Berkeley, CA, US AEUniv. of California, Berkeley, CA, US
Journal:
British Interplanetary Society, Journal (ISSN 0007-094X), vol. 46, no. 9, p. 363-366
Publication Date:
09/1993
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL CATALOGS, BRIGHTNESS, EXTREME ULTRAVIOLET EXPLORER SATELLITE, SATELLITE IMAGERY, SKY SURVEYS (ASTRONOMY), SPACEBORNE ASTRONOMY, ULTRAVIOLET ASTRONOMY, COMPUTER PROGRAMS, DATA BASES, DATA PROCESSING, NASA SPACE PROGRAMS, SPACEBORNE TELESCOPES
Bibliographic Code:
1993JBIS...46..363S

Abstract

Initial results for bright extreme ultraviolet sources discovered during the Extreme Ultraviolet Explorer (EUVE) all-sky (50-740 A) and deep ecliptic (65-360 A) surveys have been published as a Bright Source List (BSL) and released to the astronomical community with the recent NASA research announcement. This paper describes the data processing software, the EUVE survey data set, and the production of the BSL at the Center for EUV Astrophysics. The contents, format, and selection criteria for sources, the data processing strategy, some problems encountered, and a summary of the BSL results are presented.

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Title:
The EUVE Bright Source List
Authors:
Stroozas, B. A.; McDonald, J. S.; Wiercigroch, A. B.; McDonald, K. E.; Antia, B.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 182, #41.33
Publication Date:
05/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...182.4133S

Abstract

Initial results for bright EUV sources discovered during the Extreme Ultraviolet Explorer (EUVE) all-sky (50-740 Angstroms) and deep ecliptic (65-360 Angstroms) surveys are reported here as a Bright Source List (BSL). This poster describes the selection criteria for BSL sources and displays sample science products to highlight the data processing. Graphical illustrations of BSL source distributions (as based on the suggested optical counterpart identifications) are also displayed.

This work has been supported by NASA contract NAS5-29298.

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Title:
The EUVE All-Sky Survey Maps
Authors:
Lewis, J. W.; Wiercigroch, A.; McDonald, J. S.; Antia, B.; McDonald, K. E.; Stroozas, B.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 182, #41.31
Publication Date:
05/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...182.4131L

Abstract

The Extreme Ultraviolet Explorer (EUVE) satellite has completed the first phase of its mission, an all-sky survey covering the entire EUV spectrum (70--760 Angstroms). We will present a large-format (1 m by 1 m) display of the exposure-corrected survey map in the Lexan/boron band (70--180 Angstroms). This map came from the initial processing of the telemetry, which was completed one month after the end of the survey. Some interesting EUV objects, such as bright point sources and diffuse features, are visible, as well as various artifacts, such as calibration pointings, UV leaks, and data gaps. A selection of both types of features will be highlighted and briefly described. We will also describe some analysis procedures to be used during future reprocessing of the telemetry to eliminate the known artifacts.

This work has been supported by NASA contract NAS5-29298.

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Title:
EUVE Pigeonholes: A Source Analysis Procedure
Authors:
McDonald, K. E.; Wiercigroch, A. B.; McDonald, J. S.; Antia, B.; Stroozas, B. A.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 182, #03.05
Publication Date:
05/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...182.0305M

Abstract

During the six-month all-sky survey and subsequent guest observer observations, the Extreme Ultraviolet Explorer (EUVE) data analysis staff have been gathering photons from expected source positions on the sky into source ``pigeonholes.'' A pigeonhole contains photons for a region of the sky around an expected EUV source, a catalog of which was determined before launch. This electronic filing procedure has been the central data product for the analysis of EUVE sources. This procedure reduces the size of the data sets required for individual source analysis. The structure of a pigeonhole is herein described, along with some of the procedures for source verification and analysis facilitated by the pigeonhole concept.

This work has been supported by NASA contract NAS5-29298.

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Title:
The EUVE Data Processing Pipeline: A Descriptive Overview
Authors:
McDonald, J. S.; Wiercigroch, A.; McDonald, K. E.; Antia, B.; Stroozas, B. A.
Affiliation:
AA(CEA/UCB)
Journal:
American Astronomical Society Meeting, 182, #03.04
Publication Date:
05/1993
Origin:
AAS
Abstract Copyright:
(c) 1993: American Astronomical Society
Bibliographic Code:
1993AAS...182.0304M

Abstract

The Extreme Ultraviolet Explorer (EUVE) Pipeline is a set of software tools used to convert EUVE binary telemetry into useful science data products. It is used to process data from both the EUVE all-sky survey and the EUVE Guest Observer program. We follow the journey of several hundred seconds of EUVE binary telemetry, which was produced when a particularly bright EUV source was being scanned during the survey, through the various parts of the EUVE Pipeline, ending up with the final products (skymaps and pigeonholes). We present data collected from this source at various stages of processing in the pipeline.

This work was supported by NASA contract NAS5-29298.

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Title:
Spectroscopy Using a 0.60-METER Reflector and a TI:800X800 Charge-Couple Device / CCD
Authors:
McDonald, K.
Journal:
New Directions in Spectrophotometry. A meeting held in Las Vegas, Nevada, March 28-30, 1988. Editors, A.G. Davis Philip, Donald S. Hayes, Saul J. Adelman; Publisher, L. Davis Press, Schenectady, N.Y., 1988. LC # QB465 .N48 1988. ISBN # NONE P.267, 1988
Publication Date:
00/1988
Origin:
ADS
Bibliographic Code:
1988nds..conf..267M

Abstract

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