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THE ASTROPHYSICAL JOURNAL LETTERS CONTENTS OF VOLUME 487, PART 2 1997 SEPTEMBER 20, Number | HOW TO TELL A JET FROM A BALLOON: A PROPOSED TEST FOR BEAMING IN GAMMA-RAY BURSTS James E. Rhoads BIMA OBSERVATIONS OF GAMMA-RAY BURSTERS GRB 970111 AND GRB 970228 I. A. Smith, R. A. Gruendl, E. P. Liang, & K. Y. Lo CONSTRAINTS ON THE VERY HIGH ENERGY EMISSIVITY OF THE UNIVERSE FROM THE DIFFUSE GeV GAMMA-RAY BACKGROUND Paolo S. Coppi & Felix A. Aharonian A2125 AND ITS ENVIRONS: EVIDENCE FOR AN X-RAY-EMITTING HIERARCHICAL SUPERSTRUCTURE Q. Daniel Wang, Andrew J. Connolly, & Robert J. Brunner DOES THE RADIATIVE AVALANCHE FUELING WORK IN ANY ACTIVE GALACTIC NUCLEI? Yoshiaki Taniguchi ANGULAR CORRELATIONS OF GALAXY DISTRIBUTION M. Montuori & F. Sylos Labini NEUTRINO PRODUCTION OF DEUTERIUM IN SUPERMASSIVE STARS AND POSSIBLE IMPLICATIONS FOR DEUTERIUM DETECTIONS IN LYMAN-LIMIT SYSTEMS George M. Fuller & Xiangdong Shi DAMPED Lya SYSTEMS AS SPIRAL GALAXIES Federico Ferrini, Mercedes Molla, & Angeles I. Diaz THE NATURE OF THE FAR-INFRARED EMISSION FROM SEYFERT GALAXIES J. M. Rodriguez Espinosa & A. M. Pérez Garcia I Zw 18: A NEW WOLF-RAYET GALAXY Yuri 1. Izotov, Craig B. Foltz, Richard F. Green, Natalia G. Guseva, & Trinh X. Thuan DECIJANSKY RADIO FLUX BL LACERTAE OBJECTS YP Qin & G. Z. Xie NEW INSIGHT INTO THE SPATIAL DISTRIBUTION OF NOVAE IN M31 Kazuhito Hatano, David Branch, Adam Fisher, & Sumner Starrfield ATOMIC CARBON EMISSION FROM INDIVIDUAL MOLECULAR CLOUDS IN M33 Christine D. Wilson STAR FORMATION IN DISK GALAXIES DRIVEN BY PRIMORDIAL H> Edvige Corbelli, Daniele Galli, & Francesco Palla ANNIHILATION FOUNTAIN IN THE GALACTIC CENTER REGION C. D. Dermer & J. G. Skibo ON THE STRINGENT CONSTRAINT ON MASSIVE DARK CLUSTERS IN THE GALACTIC HALO F. J. Sanchez-Salcedo VERY HIGH ENERGY GAMMA RAYS FROM THE VELA PULSAR DIRECTION T. Yoshikoshi, T. Kifune, S. A. Dazeley, P.G . Edwards, T. Hara, Y. Hayami, F. Kakimoto, T. Konishi, A. Masaike, Y. Matsubara, T. Matsuoka, Y. Mizumoto, M. Mori, H. Muraishi, Y. Muraki, T. Naito, K. Nishijima, S. Oda, S. Ogio, T. Ohsaki, J. R. Patterson, M. D. Roberts, G. P. Rowell, T. Sako, K. Sakurazawa, R. Susukita, A. Suzuki, T. Tamura, T. Tanimori, G. J. Thornton, S. Yanagita, & T. Yoshida AN EXPLANATION OF THE ROSAT HIGH-RESOLUTION IMAGER ULTRAVIOLET SENSITIVITY M. V. Zombeck, M. Barbera, A. Collura, & S. S. Murray CONTENTS RXTE OBSERVATIONS OF A NEW X-RAY TRANSIENT: GRS 1737-31 Wei Cui, W. A. Heindl, J. H. Swank, D. M. Smith, E. H. Morgan, R. Remillard, & F- E. Marshall 363 Hz OSCILLATIONS DURING THE RISING PHASE OF BURSTS FROM 4U 1728-34: EVIDENCE FOR ROTATIONAL MODULATION Tod E. Strohmayer, William Zhang, & Jean H. Swank DISCOVERY OF p-MODE INSTABILITIES IN THE HOT SUBDWARF B STAR PG 1047+003 M. Billéres, G. Fontaine, P. Brassard, S. Charpinet, J. Liebert, R. A. Saffer, & G. Vauclair ON “TORQUELESS” ACCRETION FROM A MAGNETICALLY TRUNCATED DISK Y.-M. Wang MILLIMETER-WAVE SPECTROPOLARIMETRY OF EVOLVED STARS: EVIDENCE FOR POLARIZED MOLECULAR LINE EMISSION Jason Glenn, Christopher K. Walker, John H. Bieging, & PR. Jewell SHOCK CHEMISTRY IN THE YOUNG BIPOLAR OUTFLOW L1157 R. Bachiller & M. Pérez Gutiérrez EVIDENCE OF X-RAY SYNCHROTRON EMISSION FROM ELECTRONS ACCELERATED TO 40 TeV IN THE SUPERNOVA REMNANT CASSIOPEIA A G. E. Allen, J. W. Keohane, E. V. Gotthelf, R. Petre, K. Jahoda, R. E. Rothschild, R. E. Lingenfelter, W. A. Heindl, D. Marsden, D. E. Gruber, M. R. Pelling, & P. R. Blanco METEORITIC SILICON CARBIDE GRAINS WITH UNUSUAL Si-ISOTOPIC COMPOSITIONS: EVIDENCE FOR AN ORIGIN IN LOW-MASS, LOW-METALLICITY ASYMPTOTIC GIANT BRANCH STARS P. Hoppe, P. Annen, R. Strebel, P- Eberhardt, R. Gallino, M. Lugaro, S. Amari, & R. S. Lewis INSTRUCTIONS TO AUTHORS OF LETTERS, AND RECENT LETTERS ABSTRACTS AND OTHER Inside Back Cover BIBLIOGRAPHICAL SERVICES INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover 1997 OCTOBER 1, Number 2 COOLING FLOWS AND QUASARS: DIFFERENT ASPECTS OF THE SAME PHENOMENON? I. CONCEPTS Luca Ciotti & Jeremiah P. Ostriker ON NULLING INTERFEROMETERS AND THE LINE-EMITTING REGIONS OF ACTIVE GALACTIC NUCLEI G. Mark Voit SPECTROPOLARIMETRY OF FIRST BROAD ABSORPTION LINE QUASARS M. S. Brotherton, Hien D. Tran, Wil van Breugel, Arjun Dey, & Robert Antonucci THE DETECTION OF THE A2175 FEATURE AND FURTHER ANALYSIS OF THE BROAD ABSORPTION LINE PROFILE STRUCTURE IN THE GRAVITATIONAL LENS CANDIDATE UM 425 Andrew G. Michalitsianos, Emilio E. Falco, José A. Murioz, & Demosthenes Kazanas THE NARROW-LINE REGION OF NGC 4151: A TURBULENT CAULDRON Claudia Winge, David J. Axon, F. D. Macchetto, & A. Capetti CLUSTERING OF RED GALAXIES NEAR THE RADIO-LOUD QUASAR 1335.8+2834 AT z 1.1 Toru Yamada, Ichi Tanaka, Alfonso Aragon-Salamanca, Tadayuki Kodama, Kouji Ohta, & Nobuo Arimoto OH SATELLITE LINE MASERS AND AN ACTIVE GALACTIC NUCLEUS CANDIDATE IN M82 E. R. Seaquist, D. T. Fraver, & D. A. Frail INTERMITTENT RADIO GALAXIES AND SOURCE STATISTICS Christopher S. Reynolds & Mitchell C. Begelman GRAVITATIONAL WAVES FROM COALESCING BLACK HOLE MACHO BINARIES Takashi Nekamura, Misao Sasaki, Takahiro Tanaka, & Kip S. Thorne CONTENTS MULTIWAVELENGTH OBSERVATIONS OF A FLARE FROM MARKARIAN 501 M. Catanese, S. M. Bradbury, A. C. Breslin, J. H. Buckley, D. A. Carter-Lewis, M. F: Cawley, C. D. Dermer, D. J. Fegan, J. P. Finley, J. A. Gaidos, A. M. Hillas, W. N. Johnson, F: Krennrich, R. C. Lamb, R. W. Lessard, D. J. Macomb, J. E. McEnery, P. Moriarty, J. Quinn, A. J. Rodgers, H. J. Rose, F: W. Samuelson, G. H. Sembroski, R. Srinivasan, T. C. Weekes, & J. Zweerink R AQUARII: FIRST DETECTION OF CIRCUMSTELLAR SiO MASER PROPER MOTIONS D. A. Boboltz, P. J. Diamond, & A. J. Kemball INFRARED SPACE OBSERVATORY MAPPING OF 60 MICRON DUST EMISSION AROUND VEGA-TYPE SYSTEMS S. B. Fajardo-Acosta, R. E. Stencel, & D. E. Backman THE BOOMERANG NEBULA: THE COLDEST REGION OF THE UNIVERSE? Raghvendra Sahai & Lars-Ake Nyman A BIPOLAR, KNOTTY OUTFLOW WITH VELOCITIES OF 500 KILOMETERS PER SECOND OR ABOVE FROM THE ENGRAVED HOURGLASS PLANETARY NEBULA MyCn 18 M. Bryce, J. A. Lopez, A. J. Holloway, & J. Meaburn ROTATIONAL EXCITATION OF CO IN THE DIFFUSE INTERSTELLAR MEDIUM: EFFECTS OF LINE EMISSION FROM DENSE MOLECULAR CLOUDS Peter Wannier, Bryan E. Penprase, & B-G Andersson CARBON RADIO RECOMBINATION LINES IN THE ORION BAR F- Wyrowski, P. Schilke, P-H ofner, & C. M. Walmsley THE NATURE OF THE RADIO-QUIET COMPACT X-RAY SOURCE IN SUPERNOVA REMNANT RCW 103 E. V. Gotthelf, R. Petre, & U. Hwang PULSED OPTICAL EMISSION FROM PSR 0656+ 14 A. Shearer, R. M. Redfern, G. Gorman, R. Butler, A. Golden, P- O’Kane, G. M. Beskin, S. I. Neizvestny, V. V. Neustroev, V. L. Plokhotnichenko, & M. Cullum THE GIANT BRANCH OF w CENTAURI: THE DEPENDENCE OF KINEMATICS ON ABUNDANCE John E. Norris, K. C. Freeman, Michel Mayor, & Patrick Seitzer AN EMPIRICAL TEST OF THE THEORY OF CRYSTALLIZATION IN STELLAR INTERIORS D. E. Winget, S. O. Kepler, A. Kanaan, M. H. Montgomery, & O. Giovannini ERRATUM A PLANET ORBITING THE STAR p CORONAE BOREALIS Robert W. Noyes, Saurabh Jha, Sylvain G. Korzennik, Martin Krockenberger, Peter Nisenson, Timothy M. Brown, Edward J. Kennelly, & Scott D. Horner INSTRUCTIONS TO AUTHORS OF LETTERS, AND RECENT LETTERS ABSTRACTS AND OTHER Inside Back Cover BIBLIOGRAPHICAL SERVICES INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover