2.1k citations · 9.7k across the 90 of their papers we have counts for
7 papers · 1 filter
PTF1 J082340.04+081936.5: A hot subdwarf B star with a low mass white dwarf companion in an 87 minute orbit
Thomas Kupfer, Jan van Roestel, Jared Brooks +19
We present the discovery of the hot subdwarf B star (sdB) binary PTF1 J082340.04+081936.5. The system has an orbital period P min (0.060761584(10) days), ma…
Two New Calcium-Rich Gap Transients in Group and Cluster Environments
R. Lunnan, M. M. Kasliwal, Y. Cao +20
We present the Palomar Transient Factory discoveries and the photometric and spectroscopic observations of PTF11kmb and PTF12bho. We show that both transients have properties consi…
A novel method for transient detection in high-cadence optical surveys: Its application for a systematic search for novae in M31
Monika D. Soraisam, Marat Gilfanov, Thomas Kupfer +6
[abridged] In large-scale time-domain surveys, the processing of data, from procurement up to the detection of sources, is generally automated. One of the main challenges is contam…
iPTF16geu: A multiply imaged, gravitationally lensed type Ia supernova
A. Goobar, R. Amanullah, S. R. Kulkarni +31
We report the discovery of a multiply-imaged gravitationally lensed Type Ia supernova, iPTF16geu (SN 2016geu), at redshift . This phenomenon could be identified because th…
An extremely fast halo hot subdwarf star in a wide binary system
Péter Németh, Eva Ziegerer, Andreas Irrgang +4
New spectroscopic observations of the halo hyper-velocity star candidate SDSS J121150.27+143716.2 ( mag) revealed a cool companion to the hot subdwarf primary. The compone…
PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
D. L. Kaplan, T. Kupfer, D. J. Nice +32
PSR J10240719 is a millisecond pulsar that was long thought to be isolated. However, puzzling results concerning its velocity, distance, and low rotational period derivative hav…
Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational wave source GW150914
S. J. Smartt, K. C. Chambers, K. W. Smith +48
We searched for an optical counterpart to the first gravitational wave source discovered by LIGO (GW150914), using a combination of the Pan-STARRS1 wide-field telescope and the PES…