97 citations · 352 across the 24 of their papers we have counts for
26 papers
Nearby Supernova Science in the Era of High Cadence, Deep Time Domain Surveys
David J. Sand, Bhagya Subrayan, Conor L. Ransome +41
We discuss science opportunities for nearby supernovae (SNe) in the era of the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST), emphasizing the youngest phases o…
GOATS: The next generation software infrastructure for time-domain astronomy at Gemini/NOIRLab. Application to alerts from Vera C. Rubin Observatory's Legacy Survey of Space and Time
Monika Soraisam, Louis Avner, Miguel Gómez +38
Time-domain and multimessenger astronomy (MMA/TDA) targets demand rapid-response follow-up observations. In many cases, it is the only way to make discoveries and advance our under…
First Results from the LSST Shadow Survey: The Restless Luminous Blue Variable AT2017des in the Virgo-Cluster Galaxy, NGC4532
Conor L. Ransome, Bhagya M. Subrayan, David J. Sand +66
The Legacy Survey of Space and Time (LSST) will start in late-summer 2026, revolutionizing transient astronomy. Here, we present the Dark Energy Camera (DECam) Shadow Survey, which…
The Most Luminous Known Fast Blue Optical Transient AT 2024wpp: Unprecedented Evolution and Properties in the Ultraviolet to the Near-Infrared
Natalie LeBaron, Raffaella Margutti, Ryan Chornock +45
We present an extensive photometric and spectroscopic ultraviolet-optical-infrared campaign on the luminous fast blue optical transient (LFBOT) AT 2024wpp over the first ~100 d. AT…
Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury
Richard Smith, Avi Patel, Monika D. Soraisam +9
Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilising estimates of host cluster properties to constrain stellar physical…
Anomaly Detection and Approximate Similarity Searches of Transients in Real-time Data Streams
P. D. Aleo, A. W. Engel, G. Narayan +29
We present LAISS (Lightcurve Anomaly Identification and Similarity Search), an automated pipeline to detect anomalous astrophysical transients in real-time data streams. We deploy…
Windows on the Universe: Establishing the Infrastructure for a Collaborative Multi-messenger Ecosystem
The 2023 Windows on the Universe Workshop White Paper Working Group, T. Ahumada, J. E. Andrews +43
In this White Paper, we present recommendations for the scientific community and funding agencies to foster the infrastructure for a collaborative multi-messenger and time-domain a…
DRAGONS -- A Quick Overview
Kathleen Labrie, Chris Simpson, Ricardo Cardenes +10
DRAGONS (Data Reduction for Astronomy from Gemini Observatory North and South) is a platform for the reduction and processing of astronomical data. The Python-based, open-source pa…
The SN 2023ixf Progenitor in M101: II. Properties
Schuyler D. Van Dyk, Sundar Srinivasan, Jennifer E. Andrews +12
We follow our first paper with an analysis of the ensemble of the extensive pre-explosion ground- and space-based infrared observations of the red supergiant (RSG) progenitor candi…
RomAndromeda: The Roman Survey of the Andromeda Halo
Arjun Dey, Joan Najita, Carrie Filion +50
As our nearest large neighbor, the Andromeda Galaxy provides a unique laboratory for investigating galaxy formation and the distribution and substructure properties of dark matter…
The SN 2023ixf Progenitor in M101: I. Infrared Variability
Monika D. Soraisam, Tamás Szalai, Schuyler D. Van Dyk +6
Observational evidence points to a red supergiant (RSG) progenitor for SN 2023ixf. The progenitor candidate has been detected in archival images at wavelengths (>0.6 micron) where…
Deep Drilling in the Time Domain with DECam: Survey Characterization
Melissa L. Graham, Robert A. Knop, Thomas Kennedy +41
This paper presents a new optical imaging survey of four deep drilling fields (DDFs), two Galactic and two extragalactic, with the Dark Energy Camera (DECam) on the 4 meter Blanco…
Optical Rebrightening of Extragalactic Transients from the Zwicky Transient Facility
Monika Soraisam, Thomas Matheson, Chien-Hsiu Lee +11
Ongoing large-scale optical time-domain surveys, such as the Zwicky Transient Facility (ZTF), are producing alerts at unprecedented rates. Analysis of transient sources has so far…
AT2020caa: A Type Ia Supernova with a Prior Outburst or a Statistical Fluke?
Monika Soraisam, Thomas Matheson, Chien-Hsiu Lee
We recently discovered an extragalactic transient, AT2020caa, using the community alert broker ANTARES. This transient apparently exhibited two outbursts in a time span of a year (…
The ANTARES Astronomical Time-Domain Event Broker
Thomas Matheson, Carl Stubens, Nicholas Wolf +17
We describe the Arizona-NOIRLab Temporal Analysis and Response to Events System (ANTARES), a software instrument designed to process large-scale streams of astronomical time-domain…
AT 2020iko: a WZ Sge-type DN candidate with an anomalous precursor event
Monika Soraisam, Sarah DeSantis, Chien-Hsiu Lee +11
The ongoing Zwicky Transient Facility (ZTF) survey is generating a massive alert rate from a variety of optical transients and variable stars, which are being filtered down to subs…
Discovery of a ~30-Year-Duration Post-Nova Pulsating Supersoft Source in the Large Magellanic Cloud
G. Vasilopoulos, F. Koliopanos, T. E. Woods +3
Supersoft X-ray sources (SSS) have been identified as white dwarfs accreting from binary companions and undergoing nuclear-burning of the accreted material on their surface. Althou…
PHAT XX. AGB stars and other cool giants in M31 star clusters
Leo Girardi, Martha L. Boyer, L. Clifton Johnson +20
The presence of AGB stars in clusters provides key constraints for stellar models, as has been demonstrated with historical data from the Magellanic Clouds. In this work, we look f…
Variability of massive stars in M31 from the Palomar Transient Factory
Monika D. Soraisam, Lars Bildsten, Maria R. Drout +5
Using data from the (intermediate) Palomar Transient Factory (iPTF), we characterize the time variability of ~500 massive stars in M31. Our sample is those stars which are spectral…
A multi-wavelength approach to classifying transient events in the direction of M31
Monika D. Soraisam, Marat Gilfanov, Thomas Kupfer +4
(abridged) In the hunt for rare time-domain events, confusing exotic extragalactic phenomena with more common Galactic foreground events is an important consideration. We show how…
Variability of Red Supergiants in M31 from the Palomar Transient Factory
Monika D. Soraisam, Lars Bildsten, Maria R. Drout +9
Most massive stars end their lives as Red Supergiants (RSGs), a short-lived evolution phase when they are known to pulsate with varying amplitudes. The RSG period-luminosity (PL) r…
Prediction of Supernova Rates in Known Galaxy-galaxy Strong-lens Systems
Yiping Shu, Adam S. Bolton, Shude Mao +3
We propose a new strategy of finding strongly-lensed supernovae (SNe) by monitoring known galaxy-scale strong-lens systems. Strongly lensed SNe are potentially powerful tools for t…
Machine Learning-based Brokers for Real-time Classification of the LSST Alert Stream
Gautham Narayan, Tayeb Zaidi, Monika D. Soraisam +20
The unprecedented volume and rate of transient events that will be discovered by the Large Synoptic Survey Telescope (LSST) demands that the astronomical community update its follo…
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…