Messenger No. 60 (June 1990)

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1-9 (PDF)
J. M. Beckers
Planning the VLT interferometer

ADS BibCode:
Beckers, J. M.
AA(European Southern Observatory, Garching, Federal Republic of Germany)
The paper deals with the implementation plan for the Very Large Telescope (VLT) interferometer as proposed by the European Southern Observatory. The philosophy followed in the plan is based on the opportunity provided by the presence on one site of four identical 8-meter telescopes to do interferometric imaging. The properties of existing optical interferometers as well as those in the construction and planning stages are outlined, and the similarities and differences of optical and radio types of interferometry are discussed, with focus placed on adaptive optics. A proposed configuration of the VLT telescopes and the resulting plane coverage for different declinations and for zenith distance angles up to 60 deg are presented, along with some characteristics of auxiliary telescopes. Site aspects are covered, and attention is given to special tools developed for handling mirrors.
9-12 (PDF)
F. Merkle et al.
Adaptive optics at the ESO 3.6-m telescope.

ADS BibCode:
Merkle, F.; Gehring, G.; Rigaut, F.; Kern, P.; Gigan, P.; Rousset, G.; Boyet, C.
AA(ESO) AB(ESO) AC(Observatoire de Meudon, France) AD(Observatoire de Meudon, France) AE(Observatoire de Meudon, France) AF(ONERA, France) AG(LASERDOT, France)
From April 11 to 16, 1990, the VLT adaptive optics prototype system has been tested at the 3.6-metre telescope on La Silla. After the two preceding test periods at the Haute-Provence Observatory in October and November 1989 (see the article by F. Merkle in The Messenger 58, 1989) this was the first test of the adaptive optics prototype system at the telescope for which the system was initially designed.
9-9 (PDF)
D. Enard
How Will the VLT Mirrors Be Handled?

ADS BibCode:
Enard, D.
Schott is now putting the final touch to the building where the facility to produce the Zerodur VLT mirror blanks is to be installed. Meanwhile Schott is developing the various tools and equipment necessary for the casting, annealing, ceramization, machining and test of the mirror blanks.
12-12 (PDF)
F. Merkle
What's Next in Adaptive Optics?

ADS BibCode:
Merkle, F.
What's Next in Adaptive Optics?
13-15 (PDF)
D. Reimers
A wide-angle objective prism survey for bright quasars.

ADS BibCode:
Reimers, D.
AA(Hamburger Sternwarte, Universitat Hamburg, F. R. Germany)
Quasars are the most luminous objects in the universe which - not to speak about a growing interest in understanding these luminous active nuclei of galaxies themselves - can be used as light sources that probe the intervening matter at large cosmic distances early in the history of the universe. However, the number of known QSOs, in particular at high redshifts, which are sufficiently bright for detailed follow-up observations is extremely small. So, e.g., although several thousand QSOs are known at present, the only high-redshift QSO sufficiently bright for the shortwavelength camera of the IUE satellite, and as such a prime (accepted) target for the Hubble Space Telescope, was discovered only in 1988 by the Hamburg Quasar Survey with the Calar Alto Schmidt (HS 1700 + 6416, V = 16.1, z = 2.72, Reimers et al., 1989).
Barbieri, C. et al., 1989, The Messenger 58, 22.
Engels, D., Groote, D., Hagen, H.-J., Reimers, D.: 1988, The Hamburg Quasar Survey, in Proceed. Workshop on Optical Surveys for QSO, Astr. Soc. Pacific Conf. Ser2, 143
Groote, D., Heber, U., Jordan, S.: 1989, Astron. Astrophys. 222, L 1.
Hagen, H.J.: 1987, Doctoral thesis, University of Hamburg.
Reimers, D., Clavel, J., Groote, D., Engels, D.,
Hagen, H.-J., Naylor, T., Wamsteker, W.,
Hopp, U.: 1989, Astron. Astrophys. 218, 71.
Surdej, J. et al.: 1989, The Messenger55, 8.
13-13 (PDF)
S. di Serego Alighieri
The ST-ECT After the Launch of HST

ADS BibCode:
di Serego Alighieri, S.
One month after the launch of the Hubble Space Telescope (HST) the excitement is high among us at the Space Telescope European Coordinating Facilitiy (ST-ECF). We were able to follow the launch and the deployment of HST in real-time on the NASA "select" television channel, projected on the big screen in the ESO Auditorium and we are now closely monitoring the activities during the current Orbital Verification (OV) phase (an engineering check-out of HST).
15-16 (PDF)
M. Turatto et al.
A photometric and spectroscopic study of supernovae of all types.

ADS BibCode:
Turatto, M.; Bouchet, P.; Capellaro, E.; Danziger, I. J.; Della Valle, M.; Fransson, C.; Gouiffes, C.; Lucy, L.; Mazzali, P.; Phillips, M.
AA(Osservatorio Astronomico di Padova, Italy) AB(ESO, La Silla, Chile) AC(Osservatorio Astronomico di Padova, Italy) AD(ESO, Garching, F.R. Germany) AE(ESO, La Silla, Chile) AF(Stockholm Observatory, Sweden) AG(ESO, La Silla, Chile) AH(ESO, Garching, F.R. Germany) AI(ESO, Garching, F.R. Germany) AJ(Cerro Tololo Inter-American Observatory, Chile)
Supernovae are unpredictable events. For this reason, despite the fact that their interest spreads over numerous different fields, from stellar evolution to the interstellar medium and to cosmology, they have been observed, generally, with medium/small telescopes, whose schedules are flexible enough to ensure prompt observation of new objects. Therefore, the observations have been limited to the first months after outburst, and even in this period hardly on a regular basis.
Barbon, R.: 1980, in SNI, Proceedings of the
Texas Workshop on Type l supernovae,
ed. J.C. Wheeler (University of Texas, Austin),
p. 16.
Barbon, R., Cappellaro, E., Turatto, M.: 1989,
Astron. Astrophys. Suppl. 81, 421.
Branch, D., Drucker, W., Jeffery, D.: 1988,
Astron. J. 330, L 117.
Fesen, R.A., Hamilton, A.J.S., Saken, J.M.:
1989, Astrophys. J. 341, L55.
Turatto, M., Cappellaro, E., Danziger, I.J.:
1989, The Messenger 56, 36.
Long, K.S., Blair, W.P., Krzeminski, W.:
1989, Astrophys. J. 340, L25.
16-18 (PDF)
G. F. Bignami et al.
Optical follow-up identifications of hard X-ray/soft γ-ray sources discovered by the 'SIGMA' telescope.

ADS BibCode:
Bignami, G. F.; Caraveo, P. A.; Mereghetti, S.; Paul, J.; Goldwurm, A.; Vigroux, L.; Mandrou, P.; Vedrenne, G.; Roques, J. P.
AA(Instituto Fisica Cosmica, Milano, Italy) AB(Instituto Fisica Cosmica, Milano, Italy) AC(Instituto Fisica Cosmica, Milano, Italy) AD(Service d'Astrophysique, CEA Saclay, France) AE(Service d'Astrophysique, CEA Saclay, France) AF(Service d'Astrophysique, CEA Saclay, France) AG(CERS, Toulouse, France) AH(CERS, Toulouse, France) AI(CERS, Toulouse, France)
The aim of this programme is to search for the optical counterparts of hard X-raylsoft y-ray sources (including y-ray bursts and transient events) discovered by the SIGMA telescope (successfully launched on December 1, 1989), also exploiting the soft X-ray data of the all sky survey to be performed by the ROSAT satellite (launched on May 31, 1990).
18-18 (PDF)
H. E. Schwarz
Report on the First ESO/CTIO Workshop: 'Bulges of Galaxies'

ADS BibCode:
Schwarz, H. E.
Report on the First ESO/CTIO Workshop: 'Bulges of Galaxies'
18-19 (PDF)
News About the ESO Exhibition

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The travelling ESO Exhibition has a busy time this summer. Last year it was decided to duplicate most of the exhibition items, so that it can be shown in two places at once. This has paid off and both exhibitions are now booked out through most of 1991.
19-20 (PDF)
A. Fishburn
European Group of Astronomical Librarians (EGAL)

ADS BibCode:
Fishburn, A.
AA(Astrobibliothek, MPI Astrophysik Karl-Schwarzschild-Str. 1D-8046 Garching bei Miinchen)
In July 1988 IAU Colloquium 11 0, entitled "Library and lnformation Services in Astronomy" was held in Washington D. C. This was attended by 120 people from 26 different countries, including several European librarians, most of whom met each other for the first time. Inspired by the stimulating talks and discussions, and the desire to transmit the "spirit of Washington" to other colleagues who were not able to attend, the idea of EGAL was born during the closing stages of the meeting.
19-19 (PDF)
New Videos from ESO

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19-19 (PDF)
12th European Regional Astronomy Meeting of the IAU

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20-20 (PDF)
The New Look of the ESO Headquarters

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20-20 (PDF)
Announcement of the 4th ESO/CERN Symposium on 'Relativistic Astromental Physics' and the 15th Texas Symposium on 'Relativistic Astrophysics'

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21-21 (PDF)
R. Booth
Stop Press (June 6, 1990)-At Last, We Know Where La Silla Is!

ADS BibCode:
Booth, R.
Stop Press (June 6, 1990)-At Last, We Know Where La Silla Is!
21-22 (PDF)
New ESO Preprints (March-May 1990)

ADS BibCode:
697. L. Greggio and A. Renzini: Clues on the Hot Star Content and the UV Output of Elliptical Galaxies. The Astrophysical Journal
21-21 (PDF)

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21-21 (PDF)
IAU WG on Photography to Meet at ESO

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22-22 (PDF)
Professor J. H. Oort at 90

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22-22 (PDF)
Staff Movements

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23-34 (PDF)
A. Blaauw
ESO's early history, 1953 - 1975. VII. The late 1960's: structural changes, first scientific activities and some soul-searching; the journal A & A.

ADS BibCode:
Blaauw, A.
AA(Kapteyn Laboratory, Groningen, the Netherlands)
The late 1960's were years of transition. With the dedication of La Silla in March 1969, ESO's first phase of constructions had been concluded. Realization of the Schmidt and the 3.6-m telescopes would be the main goals for the next years, besides the Observatory's taking up its functions as a research institute. The transition was accompanied by a change in the structure of the management of the Organization and by the creation of a Scientific Programmes Committee. While the latter, as one of its assignments, reflected on, and suggested, directives for ESO's long-range development beyond the Initial Programme of the Convention, the Organization also underwent some thorough - and sobering - soul-searching. These developments, together with a brief account on the first scientific activities and the role ESO played in the creation of the journal Astronomy and Astrophysics will be dealt with in the present article.
Abbreviations used:
EHA = ESO Historical Archives (see The
Messenger of December 1988).
FHA = Files Head of Administration at ESO
EHPA = ESO Historical Photographs Archives.
[1] FHA Doc. ScAct-1 .
[2] FHA Doc. ScAct-2.
[3] FHA Coc. ScAct-3.
[4] For a short biography of B. Stromgren
see, for instance, the obituary by M.
Rudkjobing in Quarterly Journal R.A.S.
Vol. 29, p. 282, 1988.
[5] See the report by Blaauw in ESO Bulletin
No. 4 of July 1968.
[6] See Minutes Cou Meeting, June 1970,
p. 41.
[7] See FHA Docs ScAct-4 and 5.
[8] FHA Doc. ScAct-6.
[9] See FHA Doc. ScAct-3 of June 1967.
[l0] Minutes 7th Cou Meeting, p. 29ff.
[11] Stromgren's letter of Nov. 15 with
accompanying Cou Letter 00/2426/68
of Ramberg, and Stromgren's letter of
Nov. 20 with accompanying Cou Letter
00/2464/68 by Manager Bloemkolk,
both in FHA Cou and FC Doc's 1.1.1 ./
1.2.1 ., Circular Letters.
[12] Letter marked 31 37/69 in file FHA 1.1.l/1.2.1.
[13] FHA Doc. Cou-2, 2283/69.
[14] In FHA, attached to the Report of the
Working Group referred to under reference
[14] an English translation was
made at the request of Funke according
to FHA 1.11/1.21, Cou-2 2321/69.
[15] FHA Doc. Cou-2 3304/69.
[16] We note that in the W. Group's report
the GPO is not considered as one of the
three middle-size telescopes of the
Convention, contrary to the decision taken
by the ESO Committee in July 1960
as reported in article IV.
1171 See, for instance, FHA Doc. Cou-2
[18] EHA-I.C.7.; not yet subclassified in December
[19] In Europhysics News, Bull. of the Eur.
Phys. Soc., Vol. 6, No. 12, Dec. 1975,
p. 3-5.
[20] A report on this meeting by S.R.
Pottasch is in the section Earliest Developments
of the Archives.
[21] The Archives contain the relevant correspondence
of D.H. Sadler and F.
Graham Smith with J. H. Oort and S. R.
Pottasch of October 1967, and the report
of the R.A.S. Working Group for
study of the matter.
[22] See minutes of this meeting and Doc.
FHA Cou-2 CL 2399 of Nov. 14, 1968.
34-36 (PDF)
L. Pasquini
SN 1990I in the polar ring galaxy NGC 4650A.

ADS BibCode:
Pasquini, L.
On the night of April 29/30, 1990, Oscar Pizarro, night observer assistant at the ESO Schmidt telescope found on an ESO Schmidt B plate taken on 27.1 April 1990, a new, rather luminous object, situated very close to the edge of a quite bright galaxy. The discovery was made by comparing the new plate with an old one taken about 10 years ago. From a first glance at the plate, it was clear that the object was likely to be a new supernova.
Branch, D. et al., 1983: Ap. J. 270, 123
Danziger, I.J., Lucy, L.B., Gouiffes, C., Bouchet, P., 1990: Supernovae S.E. Woosley ed. Springer.
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Pasquini, L., Jarvis, B., Leibundgut, B., 1990: IAU Circular 5003.
Pizarro, O., Miranda, J. Pasquini, L., Leibundgut, B., 1990: IAU Circular 5003.
Whitmore, B.C., McElroy, D.B., Schweizer, F., 1987: Ap. J. 314, 439.
Woosley, S.E., Taam, R.E., Weaver. T.A., 1986: Ap. J. 301,601
36-40 (PDF)
F. Bresolin et al.
The stellar content of the dwarf galaxy NGC 3109.

ADS BibCode:
Bresolin, F.; Capaccioli, M.; Piotto, G.
AA(Dipartimento di Astronomia, Universita di Padova, Italy) AB(Osservatorio Astronomico, Padova, Italy) AC(Dipartimento di Astronomia, Universita di Padova, Italy AND European Southern Observatory)
Despite their modest appearance, dwarf irregular galaxies (DIGs) form an interesting class of objects in many respects.
Capaccioli, M., Ortolani, S., and Piotto, G.,
1987, in Proceedings of the ESO Workshop
on "Stellar Evolution and Dynamics in
the Outer Halo of the Galaxy", eds. M.
Azzopardi and F. Matteucci, p. 281.
Demers, S., Kunkel, W.E., and Irwin, M.J.,
1985, Astron. J. 90, 1967.
de Vaucouleurs, G., and Freeman, K.C.,
1972, Vistas Astron. 14, 163.
Humphreys, R.M., 1983, Astrophys. J. 269,
Hunter, D.A., and Gallagher, J.S., 1985, Astrophys.
J. Suppl. Ser. 58, 533.
Landolt, A. U., 1983a, Astron. J. 88, 439.
Landolt, A. U., 1983 b, Astron. J. 88, 853.
Piotto, G., King, I.R., Capaccioli, M., Ortolani,
S., and Djorgovski, S., 1990, Astrophys. J.
350, 662.
Sandage, A., and Carlson, G., 1988, Astron.
J. 96, 1599.
Stetson, P. B., 1987, P.A. S. P. 99, 191.
Trimble, V., 1987, Ann. Rev. Astron. Astrophys.
25, 67.
40-45 (PDF)
I. Appenzeller, S. Wagner
Probing the hidden secrets of Seyfert nuclei.

ADS BibCode:
Appenzeller, I.; Wagner, S.
AA(Landessternwarte Heidelberg-Konigstuhl, F. R. Germany) AB(Landessternwarte Heidelberg-Konigstuhl, F. R. Germany)
The nuclei of active galaxies are clearly among the most spectacular and violent places that can be found in our present universe. Most extreme are the bright Quasars, where we observe a total energy output equivalent to a large galaxy cluster from galactic core regions comparable in size to our solar system. In addition to optical and radio radiation we often observe intense X-ray and even energetic Gamma radiation as well as collimated streams of matter moving at velocities close to the velocity of light.
[1] van Gorkom, J. H., Kotanyi, C.G., Tarenghi,
M., Veron-Cetty, M.P., Veron, P.:
1 983, The Messenger 33, 37.
[2] Appenzeller, I., Ostreicher, R.: 1988, Astron.
J. 95, 45.
[3] Wagner, S. J., Appenzeller, I.: 1988, Astron.
Astrophys. 197, 75.
[4] Wagner, S. J., Appenzeller, I.: 1989, Astron.
Astrophys. 225, L 13.
[5] Schommer, R.A., Caldwell, N., Wilson,
A.S., Baldwin, J.A., Phillips, M.M.,
Williams, T. B., Turtle, A. J.: 1988, Astrophys.
J. 324, 154.
[6] Moorwood, A., 1988, The Messenger 52,
[7] Moorwood, A., Finger, G., Moneti A.:
1988, The Messenger 54, 56.
[8] Antonucci, R. R. J., Miller, J.S.: 1985, Astrophys. J. 297, 621.
45-48 (PDF)
L. Guzzo et al.
A redshift survey of automatically selected clusters of galaxies.

ADS BibCode:
Guzzo, L.; Nichol, R.; Collins, C.; Lumsden, S.
AA(Osservatorio di Brera, Milan, Italy) AB(Department of Astronomy, University of Edinburgh, Great Britain) AC(Royal Observatory, Edinburgh, Great Britain) AD(Astrophysics Group, Imperial College, London, Great Britain)
The study of the large-scale structure of the universe provides direct constraints on the initial form of the density fluctuations from which galaxies, clusters and superclusters formed. This can be achieved by mapping the large-scale galaxy distribution, with the assumption that light is a good tracer of the underlying mass distribution. To compare our maps with the theory, we need to extract some numbers describing their properties in a statistical sense. One of the main properties which are of interest in this sense is clustering, i.e. how the distribution of objects differs from a random sample. This is of great importance, since theories usually give precise predictions about the level of clustering on different scales.
Abell, G.O. 1958, Astrophys. J. Suppl., 3,
Abell, G.O., Corwin, H.G. and Olowin R. P.
1989, Astrophys. J. Suppl., 70, 1.
Bahcall, N.A. 1988, Ann. Rev. Astron. & Astrophys.,
26, 631 .
Bahcall, N.A. and Soneira, R.M. 1984, Astrophys.
J., 277, 27.
Dekel, A. 1989, in proc. Vatican Study Week
on Large-Scale Motion in the, Universe,
V.C. Rubin and G.V. Coyne eds., Vatican
City, Pontificia Academia Scientiarum -
Princeton University Press.
Heydon-Dumbleton, N. H., Collins, C.A., and
MacGillivray, H.T. 1989, Mon. Not. R.
Astr. Soc., 238, 379.
Kaiser, N. 1984, Astrophys. J. (Letters), 284, L9.
Mazure, A,, Katgert, P., Rhee, G., Dubath, P.,
Focardi, P., Gerbal, D., Giuricin, G., Jones,
B., Lefevre, O., Moles, M. 1989, The
Messenger, 57, 30.
Nichol, R.C., Collins, C.A., Guzzo, L., Lumsden,
S. 1990, in preparation.
Peebles, P.J.E. 1980, The Large Scale
Structure of the Universe, Princeton,
Princeton University Press.
Sutherland, W. 1988, Mon. Not. R. Astr.
Soc., 234, 1 59.
Tonry, J., Davis, M. 1979, Astron. J., 84, 1511.
White, S. D. M., Frenk, C.S., Davis, M., and
Efstathiou, G. 1987, Astrophys. J., 313,
48-50 (PDF)
R. M. West
Comet Austin rounds the sun.

ADS BibCode:
West, R. M.
Modern astronomers are privileged people. They exert a profession which for many is also their hobby; they receive good support from the authorities; they have the attention of a broad public and they work in a field which in virtually all respects is above political and ecological concerns. It even appears that they no longer run the risk of being punished when they make imprecise predictions ... Astronomers nowadays only rarely think of their pitiful eastern colleagues who long ago forgot to predict an eclipse and promptly lost their jobs, heads and lives.
50-55 (PDF)
M. di Martino et al.
Asteroids - A key to understand the evolution of the solar system

ADS BibCode:
di Martino, M.; Barucci, M. A.; Fulchignoni, M.
AA(Torino, Osservatorio Astronomico, Turin, Italy), AB(Paris, Observatoire, Meudon, France), AC(Roma I, Universita, Rome, Italy)
Asteroid rotational properties such as pole direction and rotation period are analyzed, and it is noted that there might be a trend toward more rapid rotation rates among very small asteroids, and that the number of asteroids with known pole directions is too small to perform conclusive statistical studies. Further consideration is given to the shape, taxonomy, and chemical composition of asteroids, and it is observed that different taxonomic types are located at different heliocentric distances, and this compositional gradient is interpreted as a 'portrait' of the solar nebulae matter. It is concluded that most of the asteroid population was influenced by collisional processes, and the observed differentiations may be due to the physical differences of the target asteroids - their size, geometry, and impact velocities. Attention is also given to distant asteroids and Apollo-Amor-Atens asteroids.
Barucci, M.A., Capria, M.T., Coradini, A.,
Fulchignoni, M.: 1987, lcarus 72, 304.
Barucci, M.A., Capria, M.T., Harris, A.W.,
Fulchignoni, M.: 1989, Icarus, 83, 325.
Binzel, R. P.: 1988, lcarus 73, 303.
Capaccioni, F., Cerroni, P., Coradini, M., Di
Martino, M., Farinella, P., Flamini, E., Martelli,
G., Paolicchi, P., Smith, P.N., Woodward,
A,, Zappala, V.: 1986, lcarus 66, 487.
Chapman, C.R., Paolicchi, P., Zappala, V.,
Binzel, R.P., Bell, J.F.: 1989, in Asteroids
II, R.P. Binzel, T. Gehrels, M.S. Matthews
eds., University of Arizona Press, Tucson,
p. 386.
Davis, D. R., Weidenschilling, S. J., Farinella,
P., Paolicchi, P., Binzel, R.P.: 1989, in Asteroids
II, R.P. Binzel, T. Gehrels, M.S.
Matthews eds., University of Arizona
Press, Tucson, p. 805.
Davis, D. R., Chapman, C. R., Weidenschilling,
S.J., Greenberg, R.: 1985, lcarus 62,
Dermott, S. F., Harris, A. W., Murray, C.D.:
1984, lcarus 57, 14.
Drummond, J.D., Cocke, W. J., Hege, E.K.,
Strittmatter, P.A.: 1985, lcarus 61, 132.
Farinella, P., Paolicchi, P., Zappala, V.: 1981,
lcarus 46, 1 14.
Farinella, P., Paolicchi, P., Zappala, V.: 1982,
lcarus 52, 409.
Fujiwara, A,, Cerroni, P., Davis, D., Ryan, E.,
Di Martino, M., Holsapple, K., Housen,
K. E.: 1989, in Asteroids II, R. P. Binzel, T.
Gehrels, M.S. Matthews eds., University of
Arizona Press, Tucson, p. 240.
Gradie, J., Veverka, J.: 1980, Nature 283,
Hartmann, W. K., Tholen, D. J., Cruikshank,
D.P.: 1987, lcarus 69, 33.
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Meteors, C.4. Lagerkvist and H. Rickman
eds., Uppsala Universitet, Uppsala, p. 77.
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Binzel, T. Gehrels, M.S. Matthews eds.,
University of Arizona Press, Tucson,
p. 1180.
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144, 261.
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Gehrels ed., Univ. of Arizona Press, Tucson,
p. 98.
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T. Gehrels, M.S. Matthews eds., University
of Arizona Press, Tucson, p. 1920.
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Taylor, R.C.: 1979, in Asteroids, T. Gehrels
ed., Univ. of Arizona Press, Tucson, p. 480.
Tholen, D.J.: 1984, PhD Thesis, Univ. of
Tholen, D. J.: 1989, in Asteroids II, R. P. Binzel,
T. Gehrels, M.S. Matthews eds., University
of Arizona Press, Tucson, p. 1139.
Vilas, F., Smith, B.: 1985, lcarus 64, 503.
Zappala, V., Di Martino, M., Cacciatori, S.:
1983, lcarus 56, 31 9.
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P.: 1983, in Asteorids, Comets,
Meteors, C.4. Lagerkvist and H. Rickman
eds., Uppsala Universitet, Uppsala, p. 73.
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P.: 1984, lcarus 59, 261.
55-57 (PDF)
G. Cremonese, M. Fulle
The dust tail of comet Wilson 1987 VII.

ADS BibCode:
Cremonese, G.; Fulle, M.
AA(Osservatorio Astronomico, Padova, Italy) AB(Osservatorio Astronomico, Trieste, Italy)
Several photographic plates, both in red and blue light, were obtained by means of the ESO Schmidt camera to study the dust and plasma tails of Comet Wilson 1987VII. All these plates were calibrated by means of calibration wedges and therefore are suitable for a quantitative analysis of the dust and ion tails. The pass-band of the emulsionfilter combination of red plates is from 630 to 700 nm, close to the R photometric system. We used plates 681 0, 6829 and 6842 to study the dust environment of C/1987VII before perihelion by means of the inverse numerical method which was successfully tested on C/1973XII and C/1962 III (Fulle, 1989).
Fulle, M., 1989, Astron. Astrophys. 217, 283.
Johnson, H.L., 1966, Annual Review Astron. Astrophys. 4, 193.
Lasker, B.M., C.R. Sturch, C. Lopez, A.D. Mallama, S.F. McLaughlin, J.L. Russell, W.Z. Wisniewsky, B.A. Gillespie, H. Jenkner, E.D. Siciliano, D. Kenny, J.H. Baumert, A.M. Goldberg, G.W. Henry, E. Kemper and M.J. Siegel 1988, Astrophys. J, suppi, ser, 68, 1.
Hanner, M.S., and R.L. Newburn, 1989, Astron. J. 97, 254.
57-59 (PDF)
R. M. West
Chiron's blue coma.

ADS BibCode:
West, R. M.
Among the nearly 4500 minor planets which have been numbered until now, (2060) Chiron is by far the most distant and certainly one of the most unusual. It moves in a rather eccentric orbit between the giant planets Saturn and Uranus and each revolution lasts just over 50 years.
59-62 (PDF)
A. Wallander
New Communication Link Between Garchin and La Silla

ADS BibCode:
Wallander, A.
In the beginning of February a new permanent communication link between ESO Headquarters and observatory came into operation. This new 64 kbps digital link will, among other things, become the backbone for remote control of the New Technology Telescope (NTT). Although the physical distance between Garching and La Silla will always be the same: the new communication link will make the logical distance between people working in Europe and South America smaller. It will contribute to a higher level of integration of the organization increasing the productivity both in technological and scientific areas.
62-63 (PDF)
N. Cramer
Atmospheric extinction at La Silla from September to December 1989.

ADS BibCode:
Cramer, N.
AA(Observatoire de Geneve, Sauverny, Switzerland)
Since November 1975, the Geneva Observatory photometry group has been systematically carrying out measurements in the Geneva 7-colour system at La Silla. Special care has been taken to ensure the conservation of the passbands and of the reduction procedures over the period of almost 30 years that the system has been in use. This guarantees the long-term homogeneity of the data recorded.
63-64 (PDF)
ESO Image Processing Group: MIDAS Memo

ADS BibCode:
Some improvements have been added to the applications related to spectroscopy especially in the LONG SLIT context. All the commands related to the context ECHELLE have now been ported from the old MlDAS into the 90 MAY release and tested on CASPEC data.