The SNAD Viewer: Everything You Want to Know about Your Favorite ZTF Object

Malanchev, Konstantin; Kornilov, M.; Pruzhinskaya, M.; Ishida, Emille E. O.; Aleo, Patrick D.; Korolev, Vladimir; Lavrukhina, Anastasia; Russeil, Etienne; Sreejith, Sreevarsha; Volnova, A.; Voloshina, Anastasiya; Krone-Martins, A.

doi:10.1088/1538-3873/acb292

Cited by 5 publications

(1 citation statement)

References 64 publications

(69 reference statements)

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“…After transient data have been parsed by a broker, a TOM will store the pre-processed alert packages and facilitate follow-up observations or identify samples for subsequent scientific analyses. Some recently developed TOMs include the Palomar Transient Factory (PTF) Follow-up Marshal (Rau et al 2009), the RoboNet Microlensing System (Tsapras et al 2009), the PESSTO Marshall (Smartt et al 2015), the Supernova Exchange (Howell & Global Supernova Project 2017), Sky-Portal (van der Walt et al 2019), the TOM-toolkit (Street et al 2018), the Global Relay of Observatories Watching Transients Happen Marshall (Kasliwal et al 2019), the Transient Science Server (Smith et al 2020), the SNAD ZTF object viewer (Malanchev et al 2023), and the NASA Exoplanet Follow-Up Portal 18 .…”

Section: Introductionmentioning

confidence: 99%

YSE-PZ: A Transient Survey Management Platform that Empowers the Human-in-the-loop

Coulter

Jones

McGill

et al. 2023

PASP

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The modern study of astrophysical transients has been transformed by an exponentially growing volume of data. Within the last decade, the transient discovery rate has increased by a factor of ∼20, with associated survey data, archival data, and metadata also increasing with the number of discoveries. To manage the data at this increased rate, we require new tools. Here we present YSE-PZ, a transient survey management platform that ingests multiple live streams of transient discovery alerts, identifies the host galaxies of those transients, downloads coincident archival data, and retrieves photometry and spectra from ongoing surveys. YSE-PZ also presents a user with a range of tools to make and support timely and informed transient follow-up decisions. Those subsequent observations enhance transient science and can reveal physics only accessible with rapid follow-up observations. Rather than automating out human interaction, YSE-PZ focuses on accelerating and enhancing human decision making, a role we describe as empowering the human-in-the-loop. Finally, YSE-PZ is built to be flexibly used and deployed; YSE-PZ can support multiple, simultaneous, and independent transient collaborations through group-level data permissions, allowing a user to view the data associated with the union of all groups in which they are a member. YSE-PZ can be used as a local instance installed via Docker or deployed as a service hosted in the cloud. We provide YSE-PZ as an open-source tool for the community.

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Section: Introductionmentioning

confidence: 99%

YSE-PZ: A Transient Survey Management Platform that Empowers the Human-in-the-loop

Coulter

Jones

McGill

et al. 2023

PASP

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Supernova search with active learning in ZTF DR3

Pruzhinskaya

Ishida

Novinskaya

et al. 2023

A&A

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Context. We provide the first results from the complete SNAD adaptive learning pipeline in the context of a broad scope of data from large-scale astronomical surveys. Aims. The main goal of this work is to explore the potential of adaptive learning techniques in application to big data sets. Methods. Our SNAD team used Active Anomaly Discovery (AAD) as a tool to search for new supernova (SN) candidates in the photometric data from the first 9.4 months of the Zwicky Transient Facility (ZTF) survey, namely, between March 17 and December 31 2018 (58194 ≤ MJD ≤ 58483). We analysed 70 ZTF fields at a high galactic latitude and visually inspected 2100 outliers. Results. This resulted in 104 SN-like objects being found, 57 of which were reported to the Transient Name Server for the first time and with 47 having previously been mentioned in other catalogues, either as SNe with known types or as SN candidates. We visually inspected the multi-colour light curves of the non-catalogued transients and performed fittings with different supernova models to assign it to a probable photometric class: Ia, Ib/c, IIP, IIL, or IIn. Moreover, we also identified unreported slow-evolving transients that are good superluminous SN candidates, along with a few other non-catalogued objects, such as red dwarf flares and active galactic nuclei. Conclusions. Beyond confirming the effectiveness of human-machine integration underlying the AAD strategy, our results shed light on potential leaks in currently available pipelines. These findings can help avoid similar losses in future large-scale astronomical surveys. Furthermore, the algorithm enables direct searches of any type of data and based on any definition of an anomaly set by the expert.

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A new redback pulsar candidate 4FGL J2054.2+6904

Карпова

Zyuzin

Shibanov

et al. 2023

Monthly Notices of the Royal Astronomical Society

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The Fermi catalogue contains about 2000 unassociated γ-ray sources. Some of them were recently identified as pulsars, including so called redbacks and black widows, which are millisecond pulsars in tight binary systems with non- and partially-degenerate low-mass stellar companions irradiated by the pulsar wind. We study a likely optical and X-ray counterpart of the Fermi source 4FGL J2054.2+6904 proposed earlier as a pulsar candidate. We use archival optical data as well as Swift/XRT and SRG/eROSITA X-ray data to clarify its nature. Using Zwicky Transient Facility data in g and r bands spanning over 4.7 years, we find a period of ≈7.5 h. The folded light curve has a smooth sinusoidal shape with the peak-to-peak amplitude of ≈0.4 mag. The spectral fit to the optical spectral energy distribution of the counterpart candidate gives the star radius of 0.5±0.1 R⊙ and temperature of 5500±300 K implying a G2–G9-type star. Its X-ray spectrum is well fitted by an absorbed power law with the photon index of 1.0±0.3 and unabsorbed flux of ≈2 × 10−13 erg s−1 cm−2. All the properties of 4FGL J2054.2+6904 and its presumed counterpart suggest that it is a member of the redback family.

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The SNAD Viewer: Everything You Want to Know about Your Favorite ZTF Object

Cited by 5 publications

References 64 publications

YSE-PZ: A Transient Survey Management Platform that Empowers the Human-in-the-loop

YSE-PZ: A Transient Survey Management Platform that Empowers the Human-in-the-loop

Supernova search with active learning in ZTF DR3

A new redback pulsar candidate 4FGL J2054.2+6904

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