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QUARTERLY REPORT

CERRO TOLOLO INTER-AMERICAN OBSERVATORY

January-February-Karch 1983

SCIENTIFIC HIGHLIGHTS P- 1

TELESCOPE OPERATIONS, INSTRUMENTAL WORK,

RELATED ACTIVITIES P- 4

ADMINISTRATIVE AND FACILITIES HIGHLIGHTS p. 7

IV. USAGE OF CTIO TELESCOPES P- 13

V. CTIO PUBLICATIONS P- 19

VI. MISCELLANEOUS p> 23

I. SCIENTIFIC HIGHLIGHTS

CTIO is -leased to announce that J. Graham of the CTIO

staff has observed the recent appearance of a young stellar

object in the Herbig-Karo object HH57. The announcement

came afxer Graham, who has been working recently on a

number of HH objects with CTIO telescopes, noticed that HK57

showed the appearance of a star-like object at the NE tip o:

the nebulous Herbig-Haro object. The star is not seen at all

on the 1976 photographs published by Schwartz (1977 Ap. c.

Suppl. 35, 161). On the blue, red and near infrared

transparencies of the ESO-SRC Atlas, a faint diffuse patch

is seen (C.F. Reipurth, 1981 A. and A. Suppl. ^~, 379). At

CTIO on March 15 and 17 1983, image tube photographs were

taken with the 1 meter telescope. On these, the object is

much brighter, especially in the near infrared and now

appears stellar,'not diffuse. Line emission may be present

but the object is clearly radiating mostly in continuum. It

is in close coincidence with an already known source, IRS 8

observed by Reipurth and Wamsteker (1982, ESO Preprint 214).

The position (1950.'0) of the IR source is RA 15 hrs 28 min

56.8 sec, Dec -"44 deg 49 min 08 sec.

Infrared photometry of the object shows it to be bright

at various IR wavelengths. CTIO staff astronomer J. Frogel

•found it to be magnitude 7.45 at 2.2ym, 6.19 mag at 3.5ym,

4.99 mag at 4.8ym, 2.12 mag at lO.Oym, and 0.10 mag at 20ym.

The strong lOym emission appears to originate m a

region with diameter less than 2 arc 'seconds centered on

the stellar source Graham identified in the visible.

Frogel and Graham subsequently obtained sub arc second

CCD images on the 4m telescope which confirm the object's

stellar nature in blue and visual frames. A spectrum, at

900 A/nun, shows a red, essentially featureless spectrum.

Astronomers at Cerro Tololo are continuing to watch

the young star to see if it will brighten still more and

to study in detail its nature and future prospects.

oPreliminary results from the Columbia University raci

telescope project were presented at a staff tea in March r-y

P. Thaddeus and students D. Grabelski and L. Bronfmann.

Grabelski estimates the mass of the Eta Carinae complex at

about 300,000 solar Masses. • Bronfmann has found a new

southern million solar mass cloud like the northern one

associated with W44. This one is associated with the radio

source PKS 1608-51.3 at galactic longitude 3319 3.

B. Tully completed four months as a visiting resident

astronomer at CTIO'.- He gave a number of cclloquia on his

work on super clusters of galaxies and the motions of

galaxies in the direction of the Virgo supercluster.

Tully completed a preliminary study of AO supergiants

in the LMC in cooperation with S. Wolff. He found that

those supergiants with spectral classes 35 to AO and which

show weak Balmer emission all lie at about My = -7.7 mag

or slightly brighter. Thus they may prove to be a valuable

distance indicator for more distant galaxies.

SCOPE OPERATIONS, -INSTRUMENTAL WORK,

RELATED ACTIVITIES

J »J->c=

Telescope Operations

TELOPS activities this quarter included continuing

maintenance work on the 4m dome and shutter mechanism,

several cays for the annual maintenance and refurbishment

of the 4m Cassegrain guider and instrument rotator modules,

and the usual heavy load of instrument changes (83 in this

90-day period). TELOPS personnel were heavily involved in

modifications to the interior structure of the 1.5m dome

to prevent the telescope's Cassegrain instruments from bashing

into assorted stairs and railings' when it is controlled from

the console room. A magnetic tape recycling unit was brought

into use; this should permit data tapes to be safely reused

several times with consequent cost savings.

The TELOPS Department had been operating at very low

staffing levels for several years as a result of the layoffs

in 19 80 and 19 81. Their numbers have now been increased to

a somewhat more reasonable level with the hiring of R. Rogers

ar.d L. Aviles as Electronics Engineers, and of J. Bravo, L.

Elicer, and O.Rivera as night assistants. The aim of this

staffing increase is to provide people on the mountain with

a much deeper level of knowledge about some particular

instruments, to give a better capability for doing small

projects on the spot, and to provide better support at the

small telescopes.

The weather conditions this quarter have varied rrom

bad to worse, with 20% of the possible observing time lost

to poor weather at the 4m telescope and 28% at the 1.5m.

Downtime from equipment failures remained low, at 3%.

Engineering and Technical Services

The first Mk III Vidicon Electronics Box system was

operated on the 4m telescope in March and the features tested

were found to operate well. Two of these systems are being

built and their hardware fabrication and debugging is nearing

completion. It is expected that they will come into full use

in the second half of 1983, once the memories of the TOLNET

computers have been expanded to permit the use of the new

Vidicon Data Taking programs. The aim of this project has

been to provide much more powerful instrument control and

on-line data reduction capabilities, improved quick-look

display capabilities, and a multi-purpose, smart electronics

system capable of accommodating future detector improvements.

In this latter respect, the Mk III VEB's have already been

adapted with very little effort to serve as controllers for

the CTIO CCD spectrometers and Cassegrain direct systems.

The Infrared Spectrometer project is proceeding at a

good pace. The mechanical design work is finished, mechanical

fabrication will be finished in about another month, and

the electronics and software design work is underway.

Considerable computer effort has gone into clearing up

longstanding bugs in the TOLNET operating system that have

led tc system crashes during observing. It is thought that

this effort has been successful. In La Serena, a major

effort has been underway to transfer the TVRED data reduction

system to the MV/8000 computer. Much of this work is now

completed. TVRED will serve as an interim system until the

IRAF system develped at KPNC can be brought up in 1984.

A new GEC CCD chip was installed in March. This will

be used both on the 4m CCD Spectrometer and for direct imaging

at the Cassegrain focii of the 4m, 1.5m, and 0.9m telescopes.

This new chip is of epitaxial construction (making it

relatively insensitive to cosmic rays) and has its full

380 x 576 pixel2 area suitable for use. It has good quantum

efficiency from about 5500 to 10000 A. Its readout noise

is about 6 electrons.

The 1.5m upgrade continues. During this period the

computer-controlled slew and dome rotation were developed.

R. Smith and F. Ribbeck began work as Electronics

Engineers. L. Alday transferred from TELOPS to work-in the

drafting office.

:il. ADMINISTRATIVE AND FACILITIES

HIGHLIGHTS

Chilean Economic News

CHILEAN INFLATION AND PESO/DOLLAR EXCHANGE KATES, CY-8 3

MONTH

JAN

FEB

MAR

% CHANGE CONSUMER CUMULATIVE CHANGE MONTHLY AVERAG:

PI-ICE INDEX CONSUMER PRICE "NDEX ' PESOS/DOLLAR*(CPI)

1.8 1.8 73.83

0.1 1-9 77.21

l.g 3.8 83.90

- Based on CTIO's actual purchases of pesos

In a conversation with the Director of Administrative

Services (DAS) on 29 Mar 83, Mr. Peter Whitney, Chief,

Economic Section, U.S. Embassy/Santiago, had the following

comments: Most Chilean officials are still saying that

inflation in CY-83 will be about 25%. However, it is to be

noted that Chilean inventories are reportedly lower, and

their gradual replenishment, in spite of the continuing

recession, will, in all probability, result in price increases.

Further, it should be remembered that the Wholesale Price

Index for CY-82 was 41.9%, and the Consumer Price Index

normally closely follows the WPI. Thus, Mr. Whitney currently

feels that it might be more realistic to predict a 30-35%

inflation in CY-83.

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Supporting Mr. Whitney's position, it is notable that

inflation in the last nine months has been about 24.9%. This

follows a six-month period (before the devaluation of the peso

and numerous other changes in economic policy) when inflation

had been only 0.4% under the fixed peso/dollar exchange.rate.

(While it would appear that there will be no more abrupt

increases in the banded exchange rate, it will probably continue

to increase until it reaches something like 100 pesos/dollar.)

The above graph, published on 23 March 83 in El Mercurio,

Chile's leading newspaper, provides.a good picture of what has

happened to the exchange policity in Chile under four different

Ministers since March 1982. CTIO has had to use all the

following rates in buying pesos:

1) Eixed Dollar:- 39 pesos/dollar, in effect from June

1979 until June 1982;

Wo

2) Basket Dollar: 46 pesos/dollar, the rate following

devaluation in June 1982; -he word "basket" was

used here because the exchange rate was based on the

relationships between a basket of foreign currencies

and the peso;

3) Free Dollar: the dollar was left to seek its own

price level in pesos;

4) Banded Dollar: 66 pesos/dollar, plus Chilean inflation,

minus world inflation (1%/month), plus or minus 2%.*

5) Parallel Market Dollar: negotiated exchanges between

individuals, exchange houses, banks, etc.; essentially

a free dollar exchange.

rid inflation was dropped from the formula in March 19 83.

The preferential dollar exchange rate continues to apply

only to those persons or firms which had significant dollar

debxs abroad when the dollar was freed in August, 1982.

In the case of the parallel market dollar, CTIO waited

for the U.S. Embassy, Santiago, to confirm that an "international

organism" (as we are identified by the GOC) could legally dealin the parallel market. Following receipt of that confirmation, .

CTIO had exactly one exchange at 124 pesos per dollar in the

week prior to Minister Caceres's announcement of the "New EconomicProgram". His announcement, still to be clarified by the

publication of detailed regulations, stated that parallel

markex exchanges will be permitted only in the case of "responsible'

institutions, and that the Central Bank will judicially

prosecute 'those persons who "without' authorizations"

"habitually" use the parallel market which "is on the

margin of the law." With this announcement, many exchange

houses backed off on their theretofore ready offers to buy

dollars at rates much more attractive than the banded rate

offered by most banks. At this writing CTIO is still

waiting for the 60C to define clearly what is meant by the

above words in •quotes.

Technically speaking, therefore, Chile continues to

have three authorized exchange rates: the preferential for

dollar debtors, the banded for non-negotiated exchanges at

established banks and exchange booths at ports-of-entry,

and the parallel market to be used by individuals and

"responsible" institutions in other than an "habitual" manner,

A current agreement between Chile and the International

Monetary Funds calls for the unification of these rates by

31 December 1983, if possible.

New Radios, Tucson and La Serena

Approval of the new radios and auxiliary equipment for

communications between La Serena and Tucson was requested of

both NSF and the Chilean Government (GOC). As the quarter

closed, no response had been received from NSF; the GOC had

announced that its final approval would be delayed until

approximately 15 July. We will continue to follow up with

11

both agencies. Meantime, the rusiness Office/Tucson continued

to review potential computer systems which, via the new radios,

will link the KPNO and CTIO computers.

La Serena Improvements

Paving of the La Serena offices' and laboratories' parking

lots has proceeded after years of postponement. An inexpensive

concrete paving block is being used. The office building annex

has been finally completed with the covering of this raw concrete

and masonry work with native stone.

Planning and quotations were obtained during the quarter

to improve the La Serena water system. Fire protection and a

reserve against electrical pump failure are motives for the

upgrade.

Cerro Tololo Improvements

1240 linear feet of the San Carlos water pipe showing

decay damage has been replaced. A quotation on plastic-lined

pipe has come in which looks like an attractive solution to

the corrosion problem.

The Yale telescope building is complete except for paint

and wall tiles.

A mini pumper fire truck arrived in February and Tololo

personnel are being trained in its use.

Work is advancing on the repair and refir.shing of the

Tololo buildings many of which had deteriorated as a result

of storms and 'maintenance delayed by previous economic problems.

A long-standing electrical ground problem in the l.rm

telescope -was corrected during the quarter.

Administrative Services Reorganization

The Administrative Services Division has reorganized the

La Serena operation into separate purchasing and operations

sections. Creation of separate purchasing and operations

offices was needed for better internal control and management

and to reduce the excessive workload on the operations manager.

Inventory control and warehouse functions will be taken

over by the individual chosen to fill the long-authorized

vacancy of "Property Officer." This individual will report

directly to Sr. Enrique Figueroa, Manager of Operations (both

La Serena and Tololo). He will be in charge of implementing

the new non-expendable property inventory system designed and

inaugurated by Sr. Figueroa, and in addition, will supervise

the four warehousemen (two on Tololo and two in La Serena) who

are in charge of similar expendable inventories, as well as

shipping and receiving. Both inventories are computerized

along similar lines and should be manageable by a single

individual under Sr. Figueroa's supervision.

IV. USAGE OF CTIO TELESCOPES

A. Statistics of --'lescope usage during the period

January 1 through March ol, 19 83:

.j c clux, : 58 nights for visitors, 30 nights ror Slq.:,

1 night for tests, and 1 night closed.

1.5m : 5^. 5 nights for visitors, 24.5 nights for staff,

1C nights for engineering, and 1 night closed.

In-. : 40.5 nights for visitors, 25.5 nights for start,

: 1 night closed, and 23 nights not used.

0.9m : 60 nights for visitors, 27 nights for staff,

1 night closed, and 2 nights not used.

0.5/0.9m : 31.5 nights for visitors, 2.5 nights for staff,

1 night closed, and 55 nights not used during

the bright of moon.

0.5m : 43 nights for visitors and 47 nights closed.

During the report period, 62 non-staff investigators from 33

different institutions participated in 48 research programs

carried out at CTIO.

14

B. Individual telescope assignments are listed below.

Graduate students are indicated by an asterisk after theirname. Nights assigned, hours worked, and telescopes used

are included.

J.A. Baldwin, Cerro Tololo Inter-American Observatory, and

A.S. Wilson, University of Maryland: Long Slit Studies

of Seyfert and Other Active Galaxies, 10(80)4.

B.Balick, University of Washington, G. Bothun, Center for

Astrophysics, and T. Heckman, University of Maryland:

The QSO Environment: Clues to their Origin, 3(12)4.

C.T. Bolton, David Dunlap Observatory, and S. Shore, Case

Western Reserve University: The Stellar Winds and

Magnetospheres of Southern Helium-Rich Stars,

7(47)1.5, 1(5)MS.

J.P. Brodie, C.S. Bowyer, and J.T. Clarke, University of

California, Berkeley: Optical Spectroscopy of the

Inner Jet in NGC 5128, 3(21)4.

R.F. Carswell, Cambridge University, G.F. Hartig and

J.A. Baldwin,' CTIO: High Resolution Spectrophotometry

of High-Redshift Quasars, 4(40)4.

Y.-H. Chu, J. Cassinelli, J. Mathis, B. Savage, D. Massa,and M. Wolfire, University of Wisconsin: a) Variability

of R 136a and Related Extreme Early Type Stars?, b)

Abundance Anomally in NGC 6231?, c) Is R 136a the Sole

Existing Source.for the 30 Dor Nebula?, 7(63)4, 4(25)1.5,

7(53)1, 5(18)0.6.

15

M.C. Cook,' University of Illinois: High Speed Photometry

of Cataclysmic Variables, 4(21)1.5, 17(118)0.9.

D. Dawson, Franklin and Marshall College: A Study of

Abundances in Old Southern Open Clusters, 7(33)1.5,

3(24)1, 4(15)0.6.

O.J. Eggen, CTIO: Intermediate Band and RI Photometry of

Supergiants, Metal Weak Stars, and High Proper Motion

Stars, 18(92)1.5, 16(51)1, 27(116)0.9.

J.L. Elliot and K. Meech, Massachusetts Institute of

Technology, and J. Frogel, CTIO: Occultation by Uranus

and its Rings, 2(11')4, 5(17)0.6.

J.A. Frogel and V.M. Blanco, CTIO: The Stellar Content of

the Nuclear Bulge of the Milky Way. II., 1(10)^.

J.A. Frogel, CTIO, J.S. Gallagher, University of Illinois

and D.A. Hunter, KPNO: Population Studies in Late-Type

and Dwarf Galaxies, 8(37)4, 3(28)1.5.

J.A. Frogel and P. Seitzer, CTIO: 1) Mass of the Fornax

Dwarf Galaxy; 2) IR Photometry of the Late Type Galaxies,

2(19)4.

J. Gallagher, University of Illinois and D.A. Hunter, KPNO:1) Structure of'Star Formation in Irr and Amorphous

Galaxies; 2) Star Forming Histories of Magellanic Cloud

Associations; 3) Spatial Variations of Stellar Populations

and Metallicity in Irregular Galaxies, 4(37)4, 3(22)1.5,

5(32)1, 2(15)0.9.

G. Gilmore, Royal Observatory Edinburgh: Southern Blue Object

Survey, 5(45)0.9, 7(51)MS.

J. Graham, CTIO: A Survey for RF. Lyrae Stars in Magellanic

Cloud Globular Clusters, 3(18)1. •

J. Graham, CTIO, and J. Nemec, University of Washington: A

Survey for RR Lyrae Stars in the Magellanic Cloud

Globular Clusters, 3(17)1.

J. Graham and M. Phillips, CTIO: The Nature of the Peculiar

Diffuse Ionized Gas in NGC 5128," 3(29)4.

G. Hartig and J. Baldwin, CTIO: CCD Spectrophotometry of

Selected Broad Absorption Line QSOs, 2(15)4.

P.W. Hodge, University of Washington: Color-Magnitude

Diagrams of Remote LMC Blue Globular Clusters, 2(16)4,

1(00)1.5, 3(21)0.9.

K.A. Janes, Boston University: Color-Magnitude Diagrams of

Distant Open Clusters, 3(29)1.5, 3(18)1, 2(14)0.9.

C. Jones, W. Forman, T. Heckman, and A. Fabian, Center for

Astrophysics, and W. Liller, Instituto Isaac Newton:

Optical Filamentation from Cooling Flows in Central

Dominant Galaxies, 3(16)4.

T.D. Kinman, KPNO, and J.A. Baldwin, CTIO: Spectroscopic

Search for Galaxies Associated with the BL Lac Object

0521-365, 1(8)4.

R. Kirshner, University of Michigan, and F. Winkler,

Middleburry College: Chemistry and Kinematics of Young

Supernova Remnants, 4(37)4.

A.U. Landolt, Louisiana State University: A Continuation of

"Photometric Sequences in Celestial Equatorial Selected

Areas," 5(30)1.5. ;

O.H. Levato and N.I. Morrell, Universidad de La Plata:

Binaries in Open Clusters and Associations, 12(91)1.

P.M. Lugger, M.P. Ulmer, and H.N. Cohn, Northwestern Univ.:

Photographic Photometry of X-Ray Clusters of Galaxies,

8(5 5)MS.

M.F. McCarthy, University of Arizona, and V.M. Blanco, CTIO:

Color Magnitude Diagram of Shapley III in the LMC,

1(7)4, 2(D1.5, 1(8)MS, i. \ - / -L . O ,

R.D. McClure and J.E. Hesser, Dominion Astrophysical Observatory

CCD Photometry of NGC 2257 and E3, 3(30)4.

G. Martin, CTIO: Interpretative Color Imagery of Astronomical

Objects by Photographic Technique, 4(30)1.

J. Melnick, Universidad de Chile,.and P. Massey, Dominion

Astrophysical Observatory: Spectral Classification of

Star in 30 Doradus, 4(34)4.

R.H. Mendez, Instituto de Astronomia y Fisica del Espacio:

Photoelectric Photometry of the Central Star of IC 418,

5(19)0.9.

H. Moreno and A. Gutierrez-Moreno, Universidad de Chile:

Secondary Spectrophotometric Standards for the Southern

Hemisphere, 2(00)1.5.

V.S. Niemela, Instituto de Astronomia y Fisica del Espacio:

OB and WE Binaries, 10(88)1.

P.S. Osmer, CTIO: The Clustering of Quasars with z>1.8, 3(14)4.

M. Parthasarathy and M. Bappu, Univ. of Texas at Austin, and

V.M. Blanco, CTIO: Absolute Magnitudes of LMC and SMC Red

Supergiants from Wilson-Bappu Effect, 4(26)4.

17

M. Phillips, CTIO: Supernovae and Supernova Remnants in

Galaxies with Starburst Nuclei, 3(26)4, 3(27)1.5.

M. Phillips, CTIO, and A.J. Turtle, University of Sydney:

Direct Photography of Nearby Seyfert Galaxies, 2(00)1.

H. Quintana, Universidad Catolica de Chile: Dynamics and

Evolution of Dumb-Bell (cD's) Galaxies, 5(48)4, 2(15)1.5.

B. Reipurth, Copenhagen University Observatory: Ha-Emission

Stars Associated with Bok Globules, 9(69)MS.

P. Schechter, Mt. Wilson and Las Campanas Observatories,

M. Aaronson and K. Cook, University of Arizona, and

V.M. Blanco, CTIO: Galactic Rotation from Carbon Stars

Viewed Through Windows in the Plane, 2(11)4, 6(23)MS.

A. Slettebak, Ohio -State University: A Spectroscopic Study

of Be Stars in Galactic Clusters, 4(28)4.

D.R. Soderblom, Center for Astrophysics: 1) Spectroscopic

Studies of Stellar Kinematic Groups; 2) Spectrophotometry

of the Alpha Centauri System, 6(41)1.5.

J. Stauffer, Center for Astrophysics, and J. Graham, CTIO:

Search for Pre-Main Sequence Members of the IC 2602

Cluster, 2(9).MS.

D. Westpfahl*, Montana State University: 0-B Stars at £=240°,

2(17)1.5, 5(35)0.9, 2(13)MS.

C.E. Worley, U.S. Naval Observatory: Visual Double Star

Observations, 7(35)1.5, 9(64)0.9.

STScI GSSS Program (observed by A. Mallama, STScI, and C. Lopez,

Universidad Nacional de Cuyo) 11(40)0.9, 29(154)0.4.

V. CTIO PUBLICATIONS

The following papers r.y staff and visiting scientists

at CTIO were published or accepted for publication during

January, February and March 198 3. Complete publication

information is given when available.

C-2473 Cowley, A.?., Crampton, D., and Hutchings, J.E. (1983)."LMC X-3: A Possible Black Hole"Central bureau for Astronomical Telegrams IAUCircular No. 37 51.

C-2474 Graham, J.A. (1983). ."Distance Indicators in the Magellanic Cloucs^Highlights of Astronomy, vol. 6, ed. A.M. West(Reidel: Dordrecht) in press.

C-2475 Conti, P.S., Myckky, L.E., and Perry, D.E:_ (1983)."The Spectra of Wolf Rayet Stars. I. Optical LineStrengths"Ap. J.

C-2476 Graham, J.A. (1983). T.„ „ ,"Commission 25" m Transaction oi the IAU Vo..XVIIIB;•ed. by R.M. West.

C-24 77 E^gen, O.J. (19 83) *"The Sirius Group as a Moving SuperclusterAstron. J.

r_?478 C°lis, L. S. (1982). ^ ."Red Variable Stars. I. UBVRI Photometry and PhotometricProperties"Astron. J. 87, 1791.

C-2479 Hartkorf, W.I., and Yoss, K.M. (1982)."A Kinematic and Abundance Survey at the Galactic Poles'Astron. J. 8_7_, 1679.

C-2480 Patterson, J., and Steiner, J.E. (1983).^"H2215-086: King of the DQ Herculis SLarsAp. J. (Letters) 264_, L61.

C-2481 Wolf, G.W.,( -, q 82) •"Times'of Minima for Southern Hemisphere Eclipsing

Commission 27 of the IAU IBVS No. 2185.

Kern, J.T., Hayes, T.L. and Chaffin, C.R.

C-2482 Wolf, G.W., and Kern, J.T. (1983)."A UVBY, B Photometric Survey of Southern HemisphereEclipsing Binary Stars"Ap; J. Suppl.

C-2483 Carney, B.W., and Jones, R. (1983)."Chemical Abundances of the Extreme-Velocity RR LyraeVY Serpentis"Ap. J.*

C-24S4 Hatchings,J.B., Cowley, A.P., and Cramp-on, D. (1983)."Evidence for Spectroscopic Periodicity in an X-RayBurster"

P.A.S.P. 9_5, 23.

C-2485 Diaz, A.I., Pagel, B.E.J. , Edmunds, M.G., andPhillips, M.M. (1982)."On the Nature of the Stellar Population in theNucleus of the Sd Galaxy NGC 779 3"M.N.R.A.S. 201, 49P.

C-2485 Eggen, O.J. (1983)."Calibrations of the Reddening, Luminosity andAbundance of Old Disk Giants from Photometry ofStars in M67, NGC 3680, NGC 242C and the Wolf 630and Arcturus Group"Astron. J.

C-2487 Landolt, A.U. (1983)." The Light Variability of the Barium Stars"P.A.S.P.

C-2488 Elias, J.H., Frogel, J.A., Hyland, A.R., andJones, T.J. (1983)."Comparison of the Mt. Stromlc/AAC and Caltech/TololoInfrared Photometric Systems.Astron. J.

C-2489 Landolt, A.U. (1983)."U3VRI Photometry of Stars Useful for CheckingEquipment Orientation Stability"Astron. J.

C-2490 Davidson, D. Gull, T.R., Maran, S.P., Stecher, T.P.,Fesen, R.A., Parise, R.A., Harvel, C.A., Kafatos, M.,and Trimble, V.L. (1982)."The Ultraviolet Spectrum of the Crab Nebula"Ap. J. 253, 696.

C-2491 Maran, S.P., Aller, L.H., Gull, T.R. and Stecher, T.P"Ultraviolet Spectroscopy of Planetary Nebulae in theMagellanic Clouds"ApT J. (Letters) 2b2, L43 (19 82).

C-2491 Filachowski, C.A., Sneden, C, and Wallerstein, 3.(19S3) ."The Chemical Composition of Stars in GlobularCluster"

Ap. J. Suppl.

C-24 93 Grauer, A.D., and Bond, H.E. (19 83)."The Pre-Cataclysmic Nucleus of Abell 41"Ap. J.

C-2^94 Frogel, J.A. (1983)."A Comment on Red Supergiant Variables in the SMC"Ap. J.

C-2495 Frogel, J.A. (1983) . ."The Evolutionary State and Pulsation Characteristicsof Red'Variables in Globular Clusters"Ap. J .

C-2 436 Graham, J.A., and Elias, J.H. (19 83)."Herbig-Haro Objects in the Dust Globule ESO 210-6AA.p. J .

C-2497 A'Kearn, M.F., Dwek, E., Feldman, P.D. Millis, R.L.,Schleicher, D.G., Thompson, D.T. and Tokunaga, A.T."The Grains and Gas in" Comet Bowell 1980b"Proceedings of the International Conference onCometary Exploration, vol. (19 83)

C-2498 Davies, R.L., and Illingworth, G. (1983)."Dynamics of Yet More Ellipticals and Bulges"Ap. J. 266, 516.

C-2499 Breysacher, J., Moffat, A.F.J., and Niemela, V.S. (1982)"The Wolf-Rayet Eclipsing Binary HD 59 80 in theSmall Magellanic Cloud"IAU Symposium No. 99 in Wolf-Rayet Stars: Observations,Phvsics, Evolution, ed. by C.W.H. De Loore and A.J.Willis (Dordrecht: Holland) p. 317.

C-2^00 Lortet, M.C., Testor, G., and Niemela, V.S. (1982)."Ring Nebulae Around WC6 Stars: NGC 6357 AroundHD 157 504"IAU Symposium No. 99 in Wolf-Rayet Stars: Observations,Physics*, Evolution, eds. by C.W.H. de Loore and A.J.Willis (Dordrecht: Holland) p. 473.

C-2501 Mendez, R.H., and Niemela, V.S. (1982)."A Reclassification of WC and "0 VI" Central Starsof Planetary Nebulae, and Comparison with PopulationI WC Stars"IAU Symp. No. 99, in Wolf-Rayet Stars: Observations,Physics", Evolution, eds. by C.W.H. De Loore and A.J.Willis (Dordrecht: Holland) p. 457.

Niemela, V.S., and Mendez, R.H. (1982)."A-Spectral Study of HD 50896"IAU Symposium No. 99 in Wolf-Rayet Stars: Observations,Physics", Evolution, eds. by C.W.H. De Loore and A.J.Willis (Dordrecht: Holland) p. 295.

C-2-0- Moffat, A.F.J., and Niemela,'V.S. (1982)."The Variable, Single-line WN8 Star HD 86161: AnotherWolf-Rayet Star with a Low-Mass Companion"Astron. and Astrophys. 106, 32 6.

VI. MISCELLANEOUS

A. Additional Personnel Notes

R. Smith, formerly of the Anglo-Australian Observatory,

joined the CTIO staff on February 27 as Assistant Engineer,

Electronics.

B. Visitors

G. Frye, Case Western Reserve University, and Mrs. Frye

visited Tololo on January 5 and 6. Dr. Frye is a physicist

working on gamma ray astronomy from balloons and had been doing

an experiment in Australia on Flare produced solar neutrons.

B. Tully, University of Hawaii, departed on March 1 after

spending 4 months at CTIO under the Visiting Resident Scientist

Program.

P. Thaddeus of the NASA Institute for Space Studies in New

York spent several weeks at CTIO in February and March inconnection with the University of Columbia telescope project.

D. Tody and G. Jacoby, KPNO, visited Tololo on February 5-14

in order to discuss the KPNO IRAF (Image Reduction and Analysis

Facility) plan with CTIO personnel.

On January 20, the Commander in Chief of the Chilean Navy,

Admiral G. Gesalaga and Mrs. Gesalaga visited Tololo.

On February 7 a group of local government dignitaries

visited Tololo and were'informed of the importance of keeping the

sky dark through controlled public lighting. The group

consisted'of the following: Lt. Crl.' C. Guzman, Intendente

of the IV Region Coquimbo; Capts. V. Guzman and L. Ortega,

Aides to the Intendente; A. Pinto, Regional Secretary for

the Press; J.L. Pena, Regional Secretary for Planning; J.

Peralta, Governor of Elqui; and W. Rivera, Mayor of Vicuna.

C. Meetings

A special meeting was held at Tololo on March 14-17 to

discuss the new 5m class telescope project. The meeting

brought together representatives of the CTIO Users' Committee,

A. Cowley, Univ. of Michgan, J. Grindlay, Center for

Astrophysics, and J. Hackwell, Univ. of Wyoming; Engineers

D. Schrage, KPNO, and F. Melsheimer of DFM Engineering;

N. Carleton, Center for Astrophysics, and members of the CTIO

staff. As 'a result of the meeting, which was chaired by

J. Baldwin, a preliminary proposal for building a 5m class

telescope with a light-weight mirror and alt-az mount has been

prepared.

J. Frogel, L: Pinto, and P. Seitzer attended the AAS

161st Meeting in Boston on January 9-12. Drs. Frogel and

Seitzer presented papers and Sr. Pinto attended the Workshop

on Photographic Materials.

V.M. Blanco, J. Graham, P.S. Osmer, and J.B. Way

attended the AURA 25th Anniversary celebrations in Tucson

on February 14-16.