Search Results - "Djorgovski, S."

A fast radio burst localized to a massive galaxy by Ravi, V., Catha, M., D’Addario, L., Djorgovski, S. G., Hallinan, G., Hobbs, R., Kocz, J., Kulkarni, S. R., Shi, J., Vedantham, H. K., Weinreb, S., Woody, D. P.

“…Intense, millisecond-duration bursts of radio waves (named fast radio bursts) have been detected from beyond the Milky Way 1 . Their dispersion measures—which…”
Get full text

Candidate Electromagnetic Counterpart to the Binary Black Hole Merger Gravitational-Wave Event S190521g by Graham, M. J., Ford, K. E. S., McKernan, B., Ross, N. P., Stern, D., Burdge, K., Coughlin, M., Djorgovsk, S. G., Drake, A. J., Duev, D., Kasliwal, M., Mahabal, A. A., Velzen, S. van, Belecki, J., Bellm, E. C., Burruss, R., Cenko, S. B., Cunningham, V., Helou, G., Kulkarni, S. R., Masci, F. J., Prince, T., Reiley, D., Rodriguez, H., Rusholme, B., Smith, R. M., Soumagnac, M. T.

“…We report the first plausible optical electromagnetic counterpart to a (candidate) binary black hole merger. Detected by the Zwicky Transient Facility, the…”
Get full text

A systematic search for close supermassive black hole binaries in the Catalina Real-time Transient Survey by Graham, Matthew J., Djorgovski, S. G., Stern, Daniel, Drake, Andrew J., Mahabal, Ashish A., Donalek, Ciro, Glikman, Eilat, Larson, Steve, Christensen, Eric

“…Hierarchical assembly models predict a population of supermassive black hole (SMBH) binaries. These are not resolvable by direct imaging but may be detectable…”
Get full text

A MegaCam Survey of Outer Halo Satellites. III. Photometric and Structural Parameters by Muñoz, Ricardo R., Côté, Patrick, Santana, Felipe A., Geha, Marla, Simon, Joshua D., Oyarzún, Grecco A., Stetson, Peter B., Djorgovski, S. G.

“…We present structural parameters from a wide-field homogeneous imaging survey of Milky Way satellites carried out with the MegaCam imagers on the 3.6 m…”
Get full text

First Results from the Catalina Real-Time Transient Survey by Drake, A. J, Djorgovski, S. G, Mahabal, A, Beshore, E, Larson, S, Graham, M. J, Williams, R, Christensen, E, Catelan, M, Boattini, A, Gibbs, A, Hill, R, Kowalski, R

“…We report on the results from the first six months of the Catalina Real-Time Transient Survey (CRTS). In order to search for optical transients (OTs) with…”
Get full text

A possible close supermassive black-hole binary in a quasar with optical periodicity by Graham, Matthew J., Djorgovski, S. G., Stern, Daniel, Glikman, Eilat, Drake, Andrew J., Mahabal, Ashish A., Donalek, Ciro, Larson, Steve, Christensen, Eric

“…A search of a data set of light curves for 247,000 known, spectroscopically confirmed quasars with a temporal baseline of about 9 years reveals a strong,…”
Get full text

A Mid-IR Selected Changing-look Quasar and Physical Scenarios for Abrupt AGN Fading by Stern, Daniel, McKernan, Barry, Graham, Matthew J., Ford, K. E. S., Ross, Nicholas P., Meisner, Aaron M., Assef, Roberto J., Balokovi, Mislav, Brightman, Murray, Dey, Arjun, Drake, Andrew, Djorgovski, S. G., Eisenhardt, Peter, Jun, Hyunsung D.

“…We report a new changing-look quasar, WISE J105203.55+151929.5 at z = 0.303, found by identifying highly mid-IR-variable quasars in the Wide-field Infrared…”
Get full text

FIRST-2MASS RED QUASARS: TRANSITIONAL OBJECTS EMERGING FROM THE DUST by GLIKMAN, Eilat, URRUTIA, Tanya, YORK, Donald G, LACY, Mark, GEORGE DJORGOVSKI, S, MAHABAL, Ashish, MYERS, Adam D, ROSS, Nicholas P, PETITJEAN, Patrick, JIAN GE, SCHNEIDER, Donald P

“…We present a sample of 120 dust-reddened quasars identified by matching radio sources detected at 1.4 GHz in the Faint Images of the Radio Sky at Twenty…”
Get full text

A fast radio burst source at a complex magnetized site in a barred galaxy by Xu, H., Niu, J. R., Chen, P., Lee, K. J., Zhu, W. W., Dong, S., Zhang, B., Jiang, J. C., Wang, B. J., Xu, J. W., Zhang, C. F., Fu, H., Filippenko, A. V., Peng, E. W., Zhou, D. J., Zhang, Y. K., Wang, P., Feng, Y., Li, Y., Brink, T. G., Li, D. Z., Lu, W., Yang, Y. P., Caballero, R. N., Cai, C., Chen, M. Z., Dai, Z. G., Djorgovski, S. G., Esamdin, A., Gan, H. Q., Guhathakurta, P., Han, J. L., Hao, L. F., Huang, Y. X., Jiang, P., Li, C. K., Li, D., Li, H., Li, X. Q., Li, Z. X., Liu, Z. Y., Luo, R., Men, Y. P., Niu, C. H., Peng, W. X., Qian, L., Song, L. M., Stern, D., Stockton, A., Sun, J. H., Wang, F. Y., Wang, M., Wang, N., Wang, W. Y., Wu, X. F., Xiao, S., Xiong, S. L., Xu, Y. H., Xu, R. X., Yang, J., Yang, X., Yao, R., Yi, Q. B., Yue, Y. L., Yu, D. J., Yu, W. F., Yuan, J. P., Zhang, B. B., Zhang, S. B., Zhang, S. N., Zhao, Y., Zheng, W. K., Zhu, Y., Zou, J. H.

“…Fast radio bursts (FRBs) are highly dispersed, millisecond-duration radio bursts 1 – 3 . Recent observations of a Galactic FRB 4 – 8 suggest that at least some…”
Get full text

Multiple chemodynamic stellar populations of the Ursa Minor dwarf spheroidal galaxy by Pace, Andrew B, Kaplinghat, Manoj, Kirby, Evan, Simon, Joshua D, Tollerud, Erik, Muñoz, Ricardo R, Côté, Patrick, Djorgovski, S G, Geha, Marla

“…ABSTRACT We present a Bayesian method to identify multiple (chemodynamic) stellar populations in dwarf spheroidal galaxies (dSphs) using velocity, metallicity,…”
Get full text

Understanding extreme quasar optical variability with CRTS – II. Changing-state quasars by Graham, Matthew J, Ross, Nicholas P, Stern, Daniel, Drake, Andrew J, McKernan, Barry, Ford, K E Saavik, Djorgovski, S G, Mahabal, Ashish A, Glikman, Eilat, Larson, Steve, Christensen, Eric

“…We present the results of a systematic search for quasars in the Catalina Real-time Transient Survey exhibiting both strong photometric variability and…”
Get full text

A Light in the Dark: Searching for Electromagnetic Counterparts to Black Hole–Black Hole Mergers in LIGO/Virgo O3 with the Zwicky Transient Facility by Graham, Matthew J., McKernan, Barry, Ford, K. E. Saavik, Stern, Daniel, Djorgovski, S. G., Coughlin, Michael, Burdge, Kevin B., Bellm, Eric C., Helou, George, Mahabal, Ashish A., Masci, Frank J., Purdum, Josiah, Rosnet, Philippe, Rusholme, Ben

“…The accretion disks of active galactic nuclei (AGNs) are promising locations for the merger of compact objects detected by gravitational wave (GW)…”
Get full text

Deep Modeling of Quasar Variability by Tachibana, Yutaro, Graham, Matthew J., Kawai, Nobuyuki, Djorgovski, S. G., Drake, Andrew J., Mahabal, Ashish A., Stern, Daniel

“…Quasars have long been known as intrinsically variable sources, but the physical mechanism underlying the temporal optical/UV variability is still not well…”
Get full text

Discovery of ∼9000 new RR Lyrae in the southern Catalina surveys by Torrealba, G., Catelan, M., Drake, A. J., Djorgovski, S. G., McNaught, R. H., Belokurov, V., Koposov, S., Graham, M. J., Mahabal, A., Larson, S., Christensen, E.

“…We present the results of a deep, wide-area variability survey in the Southern hemisphere, the first of its kind. As part of the Catalina Sky Surveys, the…”
Get full text

Luminous WISE-selected Obscured, Unobscured, and Red Quasars in Stripe 82 by Glikman, E., Lacy, M., LaMassa, S., Stern, D., Djorgovski, S. G., Graham, M. J., Urrutia, T., Lovdal, Larson, Crnogorcevic, M., Daniels-Koch, H., Hundal, Carol B., Urry, M., Gates, E. L., Murray, S.

“…We present a spectroscopically complete sample of 147 infrared-color-selected active galactic nuclei (AGNs) down to a 22 μ m flux limit of 20 mJy over the ∼270…”
Get full text

PROBING THE OUTER GALACTIC HALO WITH RR LYRAE FROM THE CATALINA SURVEYS by Drake, A J, Catelan, M, Djorgovski, S G, Torrealba, G, Graham, M J, Belokurov, V, Koposov, S E, Mahabal, A, Prieto, J L, Donalek, C, Williams, R, Larson, S, Christensen, E, BESHORE, E

“…We present analysis of 12,227 type-ab RR Lyraes (RRLs) found among the 200 million public light curves in Catalina Surveys Data Release 1. These stars span the…”
Get full text

X-Ray Properties of Radio-selected Dual Active Galactic Nuclei by Gross, Arran C., Fu, Hai, Myers, A. D., Wrobel, J. M., Djorgovski, S. G.

“…Merger simulations predict that tidally induced gas inflows can trigger kiloparsec-scale dual active galactic nuclei (dAGN) in heavily obscured environments…”
Get full text

Testing the Radio-selection Method of Dual Active Galactic Nuclei in the Stripe 82 Field by Gross, Arran C., Fu, Hai, Myers, A. D., Djorgovski, S. G., Steffen, Joshua L., Wrobel, J. M.

“…We test the merger-induced dual active galactic nuclei (dAGNs) paradigm using a sample of 35 radio galaxy pairs from the Sloan Digital Sky Survey Stripe 82…”
Get full text

RADIO-SELECTED BINARY ACTIVE GALACTIC NUCLEI FROM THE VERY LARGE ARRAY STRIPE 82 SURVEY by Fu, Hai, Myers, A D, Djorgovski, S G, Yan, Lin, Wrobel, J M, Stockton, A

“…Galaxy mergers play an important role in the growth of galaxies and their supermassive black holes. Simulations suggest that tidal interactions could enhance…”
Get full text

Using conditional entropy to identify periodicity by Graham, Matthew J., Drake, Andrew J., Djorgovski, S. G., Mahabal, Ashish A., Donalek, Ciro

“…This paper presents a new period-finding method based on conditional entropy that is both efficient and accurate. We demonstrate its applicability on simulated…”
Get full text