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Pan-Planets: Searching for hot Jupiters around cool dwarfs
C. Obermeier, J. Koppenhoefer, R. P. Saglia +18
The Pan-Planets survey observed an area of 42 sq deg. in the galactic disk for about 165 hours. The main scientific goal of the project is the detection of transiting planets aroun…
Hypercalibration: A Pan-STARRS1-based recalibration of the Sloan Digital Sky Survey
Douglas P. Finkbeiner, Edward F. Schlafly, David J. Schlegel +15
We present a recalibration of the Sloan Digital Sky Survey (SDSS) photometry with new flat fields and zero points derived from Pan-STARRS1 (PS1). Using PSF photometry of 60 million…
Pan-STARRS1 variability of XMM-COSMOS AGN. I. Impact on photometric redshifts
T. Simm, R. Saglia, M. Salvato +12
[Abbreviated] Upcoming large area sky surveys like EUCLID and eROSITA crucially depend on accurate photometric redshifts (photo-z). The identification of variable sources, such as…
Is Draco II one of the faintest dwarf galaxies? First study from Keck/DEIMOS spectroscopy
Nicolas F. Martin, Marla Geha, Rodrigo A. Ibata +8
We present the first spectroscopic analysis of the faint and compact stellar system Draco II (Dra II, M_V=-2.9+/-0.8, r_h=19^{+8}_{-6} pc), recently discovered in the Pan-STARRS1 3…
A supernova distance to the anchor galaxy NGC 4258
J. Polshaw, R. Kotak, K. C. Chambers +8
The fortuitous occurrence of a type II-Plateau (IIP) supernova, SN 2014bc, in a galaxy for which distance estimates from a number of primary distance indicators are available provi…
A Systematic Search for Changing-Look Quasars in SDSS
Chelsea L. MacLeod, Nicholas P. Ross, Andy Lawrence +10
We present a systematic search for changing-look quasars based on repeat photometry from SDSS and Pan-STARRS1, along with repeat spectra from SDSS and SDSS-III BOSS. Objects with l…
A Pan-STARRS1 study of the relationship between wide binarity and planet occurrence in the Kepler field
N. R. Deacon, A. L. Kraus, A. W. Mann +9
The NASA Kepler mission has revolutionised time-domain astronomy and has massively expanded the number of known extrasolar planets. However, the effect of wide multiplicity on exop…
On the triple peaks of SNHunt248 in NGC 5806
E. Kankare, R. Kotak, A. Pastorello +19
We present our findings on a supernova (SN) impostor, SNHunt248, based on optical and near-IR data spanning 15 yrs before discovery, to 1 yr post-discovery. The light c…
Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae
D. Scolnic, S. Casertano, A. G. Riess +16
Current cosmological analyses which use Type Ia supernova (SN Ia) observations combine SN samples to expand the redshift range beyond that of a single sample and increase the overa…
Total eclipse of the heart: The AM CVn Gaia14aae / ASSASN-14cn
H. C. Campbell, T. R. Marsh, M. Fraser +82
We report the discovery and characterisation of a deeply eclipsing AM CVn-system, Gaia14aae (= ASSASN-14cn). Gaia14aae was identified independently by the All-Sky Automated Survey…
Sagittarius II, Draco II and Laevens 3: three new Milky Way satellites discovered in the Pan-STARRS 1 3pi Survey
Benjamin P. M. Laevens, Nicolas F. Martin, Edouard J. Bernard +17
We present the discovery of three new Milky Way satellites from our search for compact stellar overdensities in the photometric catalog of the Panoramic Survey Telescope and Rapid…
LSQ14bdq: A Type Ic super-luminous supernova with a double-peaked light curve
M. Nicholl, S. J. Smartt, A. Jerkstrand +28
We present data for LSQ14bdq, a hydrogen-poor super-luminous supernova (SLSN) discovered by the La Silla QUEST survey and classified by the Public ESO Spectroscopic Survey of Trans…
The Globular Cluster System of NGC 6822
J. Veljanoski, A. M. N. Ferguson, A. D. Mackey +11
We present a comprehensive analysis of the globular cluster (GC) system of the Local Group dwarf irregular galaxy NGC 6822. Our study is based on homogeneous optical and near-IR ph…
Detection of a Type IIn Supernova in Optical Follow-up Observations of IceCube Neutrino Events
M. G. Aartsen, K. Abraham, M. Ackermann +331
The IceCube neutrino observatory pursues a follow-up program selecting interesting neutrino events in real-time and issuing alerts for electromagnetic follow-up observations. In Ma…
Galaxy Interactions in Compact Groups II: abundance and kinematic anomalies in HCG 91c
F. P. A. Vogt, M. A. Dopita, S. Borthakur +4
Galaxies in Hickson Compact Group 91 (HCG 91) were observed with the WiFeS integral field spectrograph as part of our ongoing campaign targeting the ionized gas physics and kinemat…
A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3 pi Survey
Benjamin P. M. Laevens, Nicolas F. Martin, Rodrigo A. Ibata +21
We present the discovery of a faint Milky Way satellite, Laevens 2/Triangulum II, found in the Panoramic Survey Telescope And Rapid Response System (Pan-STARRS 1) 3 pi imaging data…
Constraining the radio-loud fraction of quasars at z>5.5
E. Bañados, B. P. Venemans, E. Morganson +18
Radio-loud Active Galactic Nuclei at z~2-4 are typically located in dense environments and their host galaxies are among the most massive systems at those redshifts, providing key…
The fastest unbound star in our Galaxy ejected by a thermonuclear supernova
S. Geier, F. Fürst, E. Ziegerer +17
Hypervelocity stars (HVS) travel with velocities so high, that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US…
Machine learning for transient discovery in Pan-STARRS1 difference imaging
D. E. Wright, S. J. Smartt, K. W. Smith +15
Efficient identification and follow-up of astronomical transients is hindered by the need for humans to manually select promising candidates from data streams that contain many fal…
A Periodically Varying Luminous Quasar at z=2 from the Pan-STARRS1 Medium Deep Survey: A Candidate Supermassive Black Hole Binary in the Gravitational Wave-Driven Regime
Tingting Liu, Suvi Gezari, Sebastien Heinis +11
Supermassive black hole binaries (SMBHBs) should be an inevitable consequence of the hierarchical growth of massive galaxies through mergers, and the strongest sirens of gravitatio…
GALEX Detection of Shock Breakout in Type II-P Supernova PS1-13arp: Implications for the Progenitor Star Wind
S. Gezari, D. O. Jones, N. E. Sanders +23
We present the GALEX detection of a UV burst at the time of explosion of an optically normal Type II-P supernova (PS1-13arp) from the Pan-STARRS1 survey at z=0.1665. The temperatur…
The identification of z-dropouts in Pan-STARRS1: three quasars at 6.5<z<6.7
B. P. Venemans, E. Bañados, R. Decarli +30
Luminous distant quasars are unique probes of the high redshift intergalactic medium (IGM) and of the growth of massive galaxies and black holes in the early universe. Absorption d…
Selection of Burst-like Transients and Stochastic Variables Using Multi-Band Image Differencing in the Pan-STARRS1 Medium-Deep Survey
S. Kumar, S. Gezari, S. Heinis +24
We present a novel method for the light-curve characterization of Pan-STARRS1 Medium Deep Survey (PS1 MDS) extragalactic sources into stochastic variables (SV) and burst-like (BL)…