ADS BibCode:
1991Msngr..66....1V
Author(s)/Affiliation(s):
van der Laan, H.
AA(ESO)

ADS BibCode:
1991Msngr..66....3T
Author(s)/Affiliation(s):
Tarenghi, M.; West, R. M.
AA(ESO) AB(ESO)

ADS BibCode:
1991Msngr..66....4D
Author(s)/Affiliation(s):
de Jonge, M. J.
AA(ESO)

ADS BibCode:
1991Msngr..66....4.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66....5B
Author(s)/Affiliation(s):
Beckers, J. M.; Merkle, F.
AA(ESO) AB(ESO)

ADS BibCode:
1991Msngr..66...10B
Author(s)/Affiliation(s):
Bignami, G. F.; Caraveo, P. A.; Mereghetti, S.; Paul, J.; Cordier, B.; Goldwurm, A.; Mandrou, P.; Roques, J. P.; Vedrenne, G.
AA(Istituto di Fisica Cosmica del CNR, Milano, Italy) AB(Istituto di Fisica Cosmica del CNR, Milano, Italy) AC(Istituto di Fisica Cosmica del CNR, Milano, Italy) AD(Service d 'Astrophysique, Centre d 'Etudes de Saclay, France) AE(Service d 'Astrophysique, Centre d 'Etudes de Saclay, France) AF(Service d 'Astrophysique, Centre d 'Etudes de Saclay, France) AG(Centre d'Efude Spatiale des Rayonnernents, Toulouse, France) AH(Centre d'Efude Spatiale des Rayonnernents, Toulouse, France) AI(Centre d'Efude Spatiale des Rayonnernents, Toulouse, France)
Abstract:
First results of a program aimed at identification of hard X-ray/soft gamma-ray sources detected by the SIGMA telescope are briefly described. A newly discovered GRANAT source called GRS 1758-258, which lies only 40 arcmin from the bright soft X-ray source GX 5-1, was studied using a coded mask technique that made it possible to fill the gap between the SIGMA hard X-ray energy range and the optical domain. A soft gamma-ray source that lies 50 arcmin from the galactic center line of sight, 1E1740.7-2942, was also studied and found to be highly variable in both flux and spectral shape. The program investigated a number of peculiar, unidentified, presumably galactic X-ray sources, including GINGA-ROSAT transients, and serendipitous EXOSAT and Einstein sources.
References:
Wiy, J., m t h a l M., WQI, Nat 363,234.
Bignami G., Caraveo PA, M m g t W i S. et
al., 1 M , The -r00,16.
Brxlcht L et al. 1991, Ap.3 (Letters). in
pr=.
[)ella Vale M,, Jarvis B J., West R.M., 1991,
Aswon. Ashphys 247. L3h
Maw1 Y.. Long K.S,,Tuahy, I.R., 1988,&J.
m, 837,
Mewhetti S., Caram P., Blgnami G.F., and
Bell0111 T., 1991, subrnbted to Asm. Ae
tmphys.
Mirabel I.F., Mortis M., Wlnk J. et d., 1991,
Astron. -, In press.
Paul J., a aL, 1991, In Gamma-Ray Une
a:Du rouchoux Ph., ?rant-
N. ( h w York: IAP), 17.
Prim T., Skinner G.K, 1091, IAU Circ. 5252.
Skinner Q.K, et al., 1991, Asm. Amophys..,
In press.
Sunyaev R., et al., 1991, Asm. Astwhys.
247, L29.

ADS BibCode:
1991Msngr..66...13.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...14D
Author(s)/Affiliation(s):
de Boer, K. S.; Spite, F.; Francois, P.; Cayrel, R.; Spite, M.; Baschek, B.; Koeppen, J.; Wolf, B.; Stahl, O.; Juettner, A.; Seggeweiss, W.; Bomans, D.J.; Grebel, E.K.; Geyer, E.H.; Richtler, T.; Vallenari, A.; Koornneef, J.; Israel, F.P.; Molaro, P.; Monai, S.; Vladilo, G.; d'Odorico, S.; Leisy, R.; Dennefeld, M.; Ferlet, R.; Vidal-Madjar, A.; Stasinska, G.; Azzopardi, M.; Meyssonnier, N.; Muratorio, G.; Rebeirot, E.; Lequeux, J.
AA(Bonn, Univ.-Sternwarte, Germany), AB(Paris, Observatoire, Meudon, France), AC(Paris, Observatoire, Meudon, France), AD(Paris, Observatoire, Meudon, France), AE(Paris, Observatoire, Meudon, France), AF(Heidelberg Univ., Germany), AG(Heidelberg Univ., Germany), AH(Landessternwarte Koenigstuhl, Heidelberg, Germany), AI(Landessternwarte Koenigstuhl, Heidelberg, Germany), AJ(Landessternwarte Koenigstuhl, Heidelberg, Germany) AK(Sternwarte der Universitat Bonn, Germany) AL(Sternwarte der Universitat Bonn, Germany) AM(Sternwarte der Universitat Bonn, Germany) AN(Sternwarte der Universitat Bonn, Germany) AO(Sternwarte der Universitat Bonn, Germany) AP(Sternwarte der Universitat Bonn, Germany) AQ(Space Telescope Science Institute, on assignment from ESA) AR(Sterrewacht Leiden, Netherlands) AS(Osservatorio Astronomico, Trieste, Italy) AT(Osservatorio Astronomico, Trieste, Italy) AU(Osservatorio Astronomico, Trieste, Italy) AV(ESO) AU(ESO) AW(Institut d 'Astrophysique, Paris, France) AX(Institut d 'Astrophysique, Paris, France) AY(Institut d 'Astrophysique, Paris, France) AZ(Observatoire de Paris, Meudon, France) BA(Observatoire de Marseille, France) BB(Observatoire de Marseille, France) BC(Observatoire de Marseille, France) BD(Observatoire de Marseille, France) BE(Ecole Normale Superieure, Paris, France)
Abstract:
Results of coordinated subprojects on selected regions in Magellanic Clouds performed in the framework of the Key Program are briefly reviewed. The subprojects include spectroscopic survey with EFOSC (Marseille, Paris, Uppsala), CCD photometry of small field within the regions (Bonn), IRAC photometry of small fields within the regions (Baltimore, Leiden), stellar spectroscopy for studying element abundances in the hot and cool stars (Heidelberg and Meudon, respectively), the interstellar absorption lines (Trieste, Paris), and the spectra of emission nebulae (Paris).
References:
Barbuy, B., Spite, M., Splte, F., Milone A.
1991, Astm. As&uphys., in pr-.
BesselI, M.S. 1991, Aston, Astrophya, 242,
t17.
de Saer, KS. et al. 1389, 738 Meswww57,
27.
de Boer, K.S., Spite, F., Stasinsker, G.,
Edltors. 1889, Recent Mopmnts in
MagdIank Clod Research, Obs. de Paris.
Dufwr, R.J., Shields, GA., Talbot, R.J. 1882,
4.J. 262,451.
Feast* W.W. 1972, M.N.RAS. la, $13.
Grehsl, E.K., Rlchtler, T. 1991, 7he
IWemmgws4, p. 56.
Gmbel, E.K., Richtler, 7.1901, Astron. Astrophys.
in pms,
Qmbel, E.K., Richtler, T., de Boer, K.S. 1991,
Asm. Asliuphys. submitted.
Hetynes, R., MHne, D,, Editwrr. 1991, IAU
Symp 148, The #a@knic CWs, Kluwer.
Jllttner, A., Statil, O., Wolf, B., m e k , 5.
1991,inprep. .
Mayssonnier, N., APapardl, M. 1991, IAU
Syrrtp "MCs", p. 196.
M o b , P., Viadllo, G., O'Och~ca, S,,
nefetd, M., Ferlet, R., Vidal-Madjar, A.
lH, MU Symp. 448, p. 434.
Muratorio, G., -pard\, M, IQgO, Pm. 2nd
E m - E C F Oata Analflls WoMhop, p.
0.
Russell, S.C., Bmsdl, MS. 1988,Ap.J.S. 70,
865,
Rekemmn, A, 3ascIwkt B., Stahl, Q., Wolf,
B. lo90 Astron. Ashophys. a,10 9.
Flohlfs, K., Krebehrnann, J., Slegmann, B.C.,
Fettzingw, J.V. 194, Astfon. Astrophys.
i37,343.
Spite, M., Barbuy, B., Spite, F. 1989, Asmn.
Astmphys. =,35.
Spite, F,. Richtler, T., Spite, M. 1991, Astron.
m y s , wbm.
Tobin, W. 1891, Pack Reg. IAU Meeting,
Proc. M r . Soc. Australia, in pms.
Vladtto, G., Molaro, P., Monal, S., D'Worieo,
S*, Oennefeld, M., Fetlet, R., Vldal-Madjar,
A. mi, in prep.
Westertund, 6.E 1990, Asfron. Astrophys.
Rev. 2.29.

ADS BibCode:
1991Msngr..66...17.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...18H
Author(s)/Affiliation(s):
Hutsemekers, D.
AA(Institut d 'Astrophysique, Universite de Liege, Belgium)
References:
References mann, AJ.: 1979, Science 208, 643.
'Or astmnDmera lucky enough get cardon, B.L: ,977. Am. J- P h p k 45,331. Lynch. D.K.: 1979.5. Opt. Sot. Am. 09,1100. cloudy weather! Greenler, R.: 1980, Rainbows, halos, and O'Leaty, B.T.: 1966, 4 . J . 1443,754. It ia a pl~sur%to thank my friends cambridge university Press. Pattloch, F., Trinkle, E.: 1984, J. Opt. Soc.
and colleagues Marc Remy, Jean Surd9j Greanler, R., Matlrnann, A,J.: 1972, S-8 Am. A 1, 520.
and Eddy Van Drom for their comments 176,128. Whalley, E., Mclaurln, G.E.: 1984, J. Opt.
ZENITH
and enthusiasm.
20
data ma glm ~arelsvdlflon/t, I s m y to
rmIk that the Ibht my6 C, 4 E q p m t t y
coma fmm arcs or circl85 which are centred
on the miih and Ile at constant elevarion
above he horlm (be Fig. 8). the fheb degree
of hwdm k me hrd crysws be-
E
ing mWan awnd W wticml ax&. The
0 paw'ic ~ g the hsun an d
may be seen fw any sun eievatbn. On the
~wn iwR, ., Mueller, J.R., Hahn, w., M ~ I - soc. ~ mA. I, I 166.

ADS BibCode:
1991Msngr..66...21H
Author(s)/Affiliation(s):
Hofstadt, D.; Mornhinweg, M.
AA(ESO) AB(ESO)

ADS BibCode:
1991Msngr..66...23B
Author(s)/Affiliation(s):
Burwitz, V.; Reinsch, K.; Pakull, M. W.; Bouchet, P.
AA(Berlin, Technische Univ., Germany), AB(Berlin, Technische Univ., Germany), AC(Landessternwarte Koenigstuhl, Heidelberg, Germany), AD(ESO, La Silla, Chile)
Abstract:
The mutual eclipse light curves of Pluto and Charon are analyzed. Six transits of Charon in front of Pluto and eight occultations of Charon by Pluto were observed from 1985 to 1990 using the ESO/MPI 2.2-m telescope and the Danish 1.5-m telescope, respectively. High-precision differential photometry was obtained using CCD direct imaging techniques. It is found that there is a dark north polar cap on Pluto which can be explained under the assumption that the surface structures have changed during the past 35 years (Stern et al., 1988). This finding is in contradiction with the bright polar caps required by models of Marcialis (1988) and Buie and Tholen (1989).
References:
Binrel, R.P., Tholen, D.J., Tedasco, EF.,
Buratti, B.J., Nelscm, R.M., 1985, Sc1228,
1133.
Blnrel, R.P., 1988, Sd 241,1070.
mie, M.W., Tholen, DJ., 1 gSg, Icmm79,23.
Dunbar, R.S., Tedese~, E.F., 1986 AJ 92,
1203.
OHot, J.L, Dunhem, E.W., Bosh, AS., et at.,
1989, Icanrs77.148.
Marclalls, R.L., 1988, AJ M, 941.
Pakull, M.W., Relnsch, K., 1086, The
Messww*, 3.
Relmh, K., Pakull, M.W., 1987, Asfm. Astmphys
tn, L43.
Stem, $94, Tmftm, LM., Gladstone, G.R.,
1988, I- 75,485.
fholen, D.J., We, M.W., Swift, C.E, I987a,
AJ32,244.
M e n , D.d,, Buie, M.W., Biml, R.P., Frueh,
M.L, 1#7b. &1237, Sl2.
fholen, D.J., Bule, M.W., 1988, MW, 1977.
fholen, D.J., Hubbard, W.B., 1988. Amon.
&Whys. m, L5.
fholm, D.J., Bde, M.W., IM, 8AU 22,
1129.
Walker, M.F., Hardb, R., 1955. PASP 67,
224.

ADS BibCode:
1991Msngr..66...26.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66R..27.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66Q..27.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...28B
Author(s)/Affiliation(s):
Bandiera, R.; van den Bergh, S.
AA(Ossenratorio Astrofisico di Arcetri, Firenze, Italy) AB(Dominion Astrophysical Observatory, Victoria, Canada)
References:
made, w. I~~E~,A~.J.,1Q19?. , DDdorlw, S., Bandkm, R., W g w , J.,
Bandlera, R. 1987, Ap.J., 319,885. F d l , P. 1086, Ask J., 91, 1382.
-era, R. lgm, In Supemova shelfs and ~ d b o ~ l t r ,E .M., w p w , I.J. tm3.
thdr Mrfh ad. W. Kundtt w m MrNRA.8,2W, 273.
Notes in Physlcs S ~ WS .P ~ ~VWed a, M&uI, Y., Long, U.D,lc kel, J.R., G d n ,
Berlin, p. 81. E.W. 1984. Ap. J., 287,295.
Barsdiew, R., van den B e ~ hS, . lQQApf.* , MCW, C. 1888. In -W ~~#nnsnts
J., 974, 186. and tne I ~ t M aMr u m ,W Coll. 101,
Bandlera, R.1 a w h , S. 1991 b, In SN gds. R.S. Roger, and f.L Landecker, Cam-
19874 and other SuPemova6 hid* Vniv. PM, New York, p. 205.
ings of ESO/EIPC 1W- eds. 1.J- Dm- van den Bmgh, S. Kamw, Yaw.1 077, Ap. J.,
ziger and K. 1<1&, p. 661.

ADS BibCode:
1991Msngr..66...31B
Author(s)/Affiliation(s):
Bandiera, R.; Della Valle, M.
AA(Osservatorio Astrofisico di Arcetri, Italy) AB(ESO)

ADS BibCode:
1991Msngr..66...32M
Author(s)/Affiliation(s):
Malbet, F.; Léna, P.; Bertout, C.
AA(Observatoire de Paris & Observatoire de Grenoble) AB(Observatoire de Paris & Universite Paris VII, France) AC(Observatoire de Grenoble)

ADS BibCode:
1991Msngr..66...33.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...35.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...36W
Author(s)/Affiliation(s):
Weiss, W. W.; Schneider, H.
AA(Vienna Univ., Austria), AB(Univ.-Sternwarte, Goettingen, Germany)
Abstract:
Recent developments in asteroseismology are reviewed focusing on its major scientific goals, observational techniques, and the most prominent aspects of stellar physics which benefit from asteroseismology, and asteroseismological projects at La Silla. Asteroseismology analyzes the stellar structure using a frequency spectrum which makes it possible to determine characteristic periodic structures within the spectrum. Two observable quantities used for asteroseismological observations include brightness and velocity fluctuations induced by pulsations. The asteroseismology is considered to be a powerful tool for probing the internal structure and dynamics of stars.

ADS BibCode:
1991Msngr..66...40G
Author(s)/Affiliation(s):
Groenewegen, M. A. T.; de Jong, T.
AA(Amsterdam Univ., Netherlands), AB(Lab. for Space Research, Groningen, Netherlands)
References:
Allen D.A. Hylmd AR., longmore AJ., Cm-
Wl J-L, Goss W.M., Haynes R.F., l g n
4.J. 217,108.
Baron Y., de Mukon M., Papoular P.,
Pegoutia B., 1987, AstrontArosnt rophp.
Bwchet P., Manfmld J., Schrnidw F.-X.,
1991, ESO mint 748.
BuWetti E., Colangeli L, Borghest A, Omflni
V., 1987, A&m. As-. Suppl. 10,
257.
C m M., Kuhi LV., t%7, PAW 89,829.
Fwel JA, Persson 8E., Cohen J.G., 1980,
&J. 2m, 495.
Qrwwsgen MAT., de Jong T., van der
Blkk NS, 8iJkhuis S., Willems F.J., 7391,
Aohr. A s m * . In p r a .
Oroenewegm MAT., de Jong T., 1992, in
preparation.
J u M~,, 3 980, &J. 303,327.
Kdke C., W a w a H., Manabe A, iQW,
Ap,d ss 6?, 495.
Kuomnmt J., 1W3, Ask#, ktmphp. $28,
84.
Labofsky MJ., Kleinmmn S.G., 1976, A.J.
81, 534,
Undqvlst M., Nyrnan LA., Olofsson H., Wnnberg
A, 1988, Astron, Aslrophp. 206, L15
hm R., Qdl l~teaS. . Omont A, l w ,
Astmn. Amqhp. 104,230.
Nyman LA, Booth R.S., CWstrpm U., Hab-
Ing H.J., Hake A, Omont A, SaM R.,
Stark R, van der Vwn W.E.CJ., Win-
A, 1991, &!ton. -. Sup@. In
w*
Pegouile B., 1988, AWon. AstrophyB. 1194,
3%.
FUdgway S.T., Carbon D.F., Hail D.N., 1W8,
ApJ. 226,138.
WJ R., 1m, &J. 382,852.
Sahai R., 1991, In preparetbn.
Stephemon QB,, 1989, Pub, Warner and
Swmey Obs., vor. 3, no. 2.
Vm ch Vwn W,E.C.J., Oldsson H,, I-,
F m h l h s t o ~ m y N ~ & .
M.O. Men-&, A. Omontt Edbns
Froniihrea, af-sur-Yvette, p. 13Q.
WRW FJ., 19M, AstrontrAosnb phy$ 203,
51.
Wnlems EJ,, de Jong T., 1988 Mmn. A s b
tM, 173.
~ckemr anB ., Oyek H.M., 188% 4 . J . 311,
345.

ADS BibCode:
1991Msngr..66R..46.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66Q..46.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...47M
Author(s)/Affiliation(s):
Maceroni, C.; van't Veer, F.; Vilhu, O.
AA(Osservatorio Astronomico, Rome, Italy), AB(CNRS, Inst. d'Astrophysique, Paris, France), AC(Helsinki Univ. Observatory, Finland)
Abstract:
Results of simultaneous spectroscopic and photometric observations of two southern W UMa systems, AE Phe and YY Eri, are described. Photometric observations were performed using a CAT telescope, equipped with a CES spectrograph, a short camera, and CCD, and an ESO 50-cm telescope. The high-precision spectroscopy was based on the Doppler imaging method. It is concluded that both systems show asymmetric perturbations of the light curves. The most evident feature of this effect is that the maximum following primary minimum (max I) is brighter than the maximum II. There was similarity between photometric and spectroscopic maps, especially in reference to the spot location and temperature distribution.
References:
Bjnnendijk L 1970, WsM In Astron. 12,217.
Ewer M. 1981, PASP W, 528.
QronW, 0. 1976, Astm. Astrophp.
SUM24. ,399.
Kuiper P.G. 1941, Ap.J. 93,133.
Lucy LB. 1908, Ap.J. 151, 1123.
Maoeroni C., van Hamme W., Van 't Veer F.
1 W, Astm. AstmMys. 234,177.
Maceronl C., Van 't Veer F. 1990 In Active
Close Blnark Ed. C. tbanoglu, Kluwer
Acad. Publ. Dordrecht, p. 309.
Piskunov N.E, Tuorninen I., Vilhu 0. 1990,
Asttvn. Astrophys. 230,383.
Schakm E 1962, Ann Astmphw. 2s, 18.
Van 't Veer F. 1975, ktron. Astrophys 40,
167.
Wlhu 0. 1Q82, Astm Astrwphys. 109,17.
V-1 S.S., Penrod G.D. 1Q83, PASP 95, 565.
Wilson R.E 1979, 4p.J. 254, 1054.
Wilson R.E., Biennann, P. 1970. Astmn. Aswhys.
48,349.

ADS BibCode:
1991Msngr..66...50P
Author(s)/Affiliation(s):
Pollacco, D.
AA(St. Andrews Univ., United Kingdom)
Abstract:
Two scenarios are described which attempt to reconcile the observed photospheric abundances with model predictions for the R Coronae Borealis (R CrB) stars. These scenarios are: the last thermal pulse scenario (Renzini, 1979, 1981 and Iben et al., 1983) and the merged white dwarf scenario (Webbink, 1984).

ADS BibCode:
1991Msngr..66...53J
Author(s)/Affiliation(s):
Jorissen, A.; Manfroid, J.; Sterken, C.
AA(ESO, Garching, Germany), AB(Liege Univ., Belgium), AC(Brussel, Vrije Univ., Brussels, Belgium)
Abstract:
Photometric monitoring of barium stars is discussed with particular attention given to the first eclipsing binary barium star, HD 46407. The spectroscopic ephemeris of HD 46407 was used to predict the times of a possible eclipse of the companion by the barium star. It is concluded that the light curve of HD 46407 derived from the photometric observations in the D50 system displays a sharp 'primary' eclipse (companion behind the barium star) and a possible shallow 'secondary' eclipse. The primary eclipse occurred in November 1988 and had a depth of about 0.02 mag.
References:
Bldelrnan, W.P., Keenan, P.C. 1951, &J.,
t14,473.
bffin, H.M.J., Jodwm,A. 1 9 8 8 , m . A ~ -
mRYs, m 155.
mm-w, E 19m, Ap.J., 2aa, L79.
BBnm-Vltense, E., Nemc, J., Proffltt, Ch.
1984, ApJ., 270,726.
Domlny, J.F.,LamM,D.L.lW,Ap.J.,270,
180.
Hakkila, J. 198Oa, A.J., 98,699.
Hakkifa, J. 1989b, m n . A stmphysys2, 19
204.
Hakkita, J., MeNamara, 6.J. f 987, Astron.
-, 10B, 255.
Jotissen, A., Mayor, M. 1988, Asm. Ashphm,
1!W, 187.
JoriSWI, A, ManWd, J., Sterken, C. IWl,
&irona Asiqhys., In p-.
Larwiok, AU. 1983, PAW, H, 644.
U, P.K.. D a r n , D.W., Upgren, AR., Wels,
E,W. 1983, &J., 62, la.
Manhold, J. 1985, habiT~t, theds, Univ. of
w e .
hamfroid, J., Swken, C., Bruch, A.. Bwger,
M., de Groot, M., D u W , H.. Duemmler,
R., Figer, A, Hageman, T., Henaberg, H.,
Jorissen, A., Madejsky, R., MandeI, H., Ott,
H., ReItermann, A, Schulte-Ladbeck, R.,
Staht, O., Steenman, H., vander Unden D..
irckgral, FA. 1991, Astm, Astrophyw
8up@., 87,48 1 ,
McClure, R.D. 1983, ApJ., 268,264.
McChrre, R.O. 1984, PASP, #, 11 7.
Mc C ~ U ~R.,D ., WQO&WOT~~,A W. 1980,
Ap.J*, 932, m.
Starken, C. 1983, The Mesengw, 33,IO.
Tout, C.A.. Eggleton, P.P. 1988, M N M
291,823.
Webblnk, R.F. 1886, In: W a l Obwvatlons
vsPhysicalM&forCl~~131~Systsms,
eds. KC. Leuw and D.S. Zhal, Mew
Yo&, Gordon and Breach.

ADS BibCode:
1991Msngr..66...56.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...57G
Author(s)/Affiliation(s):
Giraud, E.
AA(ESO)
References:
Cowie LL, Qardner J.P.. Waincoast RJ.,
Hodapp K.W., 1 Wl , preprint.
Fort B., 1991, preprht.
GldaI.M.,&al., 1984.qo.J,283,45.
O M E.. 1H1, ESO mr l n t .
Guiddonl 6.. and Roc

ADS BibCode:
1991Msngr..66...58B
Author(s)/Affiliation(s):
Benvenuti, P.; Porceddu, I.
AA(Space Telescope-European Coordinating Facility, Garching, Germany), AB(Stazione Astronomica, Cagliari, Italy)
Abstract:
An approach to the study of the diffuse interstellar bands (DIBs) is discussed, and results obtained so far are presented. Emphasis is placed on lines of sight along which some components of the interstellar medium including the DIBs deviate from the average behavior. The varying intensity ratios between features belonging to different families, the lack of some of the diffuse bands along peculiar lines of sight, and the apparent absence of DIBs when the reddening is mainly due to circumstellar matter are considered.

ADS BibCode:
1991Msngr..66...61B
Author(s)/Affiliation(s):
Boer, M.; Motch, C.; Pedersen, H.; Brandt, S.; Castro Tirado, A. J.; Lund, N.; Smette, A.
AA(Max-Planck-Institut fur Extraterrestrische Physik, Garching bei Munchen, Germany) AB(Max-Planck-Institut fur Extraterrestrische Physik, Garching bei Munchen, Germany) AC(Copenhagen University Observatory, Denmark) AD(Danish Space Research Institute, Lyngby, Denmark) AE(Danish Space Research Institute, Lyngby, Denmark) AF(Danish Space Research Institute, Lyngby, Denmark) AG(ESO, La Silla)
References:
[I] Klebesadd RW., Strong I.B., Olson
R.k: 1873. AshWhp. J. Letttws, 182,
85.
Motck, C. et d.: 1985 AHm. Aimphys.,
145,201.
131 &rer M. et at.: 1988, ABfFOn. ASftophp.,
202,117.
141 W M . et at.: 1991, Astron. A&whya,
a49, ti& rn ~ttetaet 4.:1 w ,~ pJ. ~ e ~ t e.r s ,
sno, 105.
I6l Fenimw et d., 1987, Ashqhys. J. Letters,
=, 111.
l7l b t s , E S. et d.; dgm, ~ wA.s-.
L&em 6,343.
[Bj Golenebkii, S., Ilylnaki V., Mmts E.:
1964, Niature, W ,41.
p] m n C A el al.: 1891, IAU C h l a r
535s.
D Ol SdmeW, 6.E et d.: 1981, Natwe, 2W
722.
[It] H-, R. Per-, R.. Match C.: IW,
Aptm. As&phys., 285,174, [la Grelner, J., Maumann, C,, Wenzel W.:
1891, Asttvn. Asimphys.. 24$L 425.
1133 Zytkow, AN.: t BQO, AstmpW. J., atia,
138.
[I41 Greiner, J.: 1991, Ashoh Mrophys.,
254,251.
[I4 S c W RE., WI, As&@@. J., 9BA
590.
GRB 91m19b

ADS BibCode:
1991Msngr..66...61.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...63Z
Author(s)/Affiliation(s):
Zeilinger, W. W.
AA(ESO)
References:
ESO CCD M a ~ l3,m ation (ta SHla, May
1 osl).
ESO 9peratIng Manu611, No. 2: The Boiler &
Chlvens spemcgraphs (IsBs), No.4
EFOSC (1989). No. & CASPEC (1989).
Mo. 14: EMMI {dMt 1Wl).
Melnick, J., aOSC2: Not= for observers (La
Sllla, April 1991). EMMI: Notes for obwv
m (La Sllla, Sept. 1991).
Pasquint, L and GillIotte, A., fhe W n g e r ,
66, so (1991).

ADS BibCode:
1991Msngr..66R..66.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66Q..66.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...67M
Author(s)/Affiliation(s):
Moneti, A.; Gemperlein, H.
AA(ESO) AB(ESO)

ADS BibCode:
1991Msngr..66...67.
Author(s)/Affiliation(s):
ESO
AA(ESO)

ADS BibCode:
1991Msngr..66...68.
Author(s)/Affiliation(s):
ESO
AA(ESO)