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19962026
most citedThe Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

2.5k citations

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52 papers · 1 filter

astro-ph.HE2026

Radio Follow-Up of Einstein Probe Fast X-Ray Transients

Carmen Choza, Joe S. Bright, Francesco Carotenuto +3

Fast X-ray transients (FXTs) are brief, luminous bursts of soft X-ray emission whose physical origins remain uncertain. The Einstein Probe (EP) mission has recently enabled prompt…

astro-ph.HE2026★ 1 cited

The NANOGrav 15 yr Data Set: Customized Chromatic Noise Models

Bjorn Larsen, Jeremy G. Baier, Daniel J. Oliver +53

Pulsar timing arrays conduct low-frequency gravitational wave searches, which require comprehensive accounting of various noise sources to achieve robust results. Interstellar prop…

astro-ph.HE2026

Gravitational Wave Measurement of the - Intrinsic Scatter at High Redshift

Cayenne Matt, Kayhan Gültekin, Gabriella Agazie +109

The observed GWB spectrum is higher in amplitude than model predictions by a factor of 2-3. Using a semi-analytic model, we evaluate the effect of a high-scatter supermassive black…

astro-ph.HE2026

An infrared echo from a circumstellar disk in the hydrogen- and helium-poor SN 2024aecx

Samaporn Tinyanont, Kittipong Wangnok, Jennifer E. Andrews +34

We present near-infrared (NIR) spectroscopy of the hydrogen- and helium-poor (Type Ic) supernova (SN) 2024aecx, which displays a strong NIR excess emerging 32 days post peak. SN 20…

astro-ph.HE2025

Searching for Exotrojans in Pulsar Systems

Jackson D. Taylor, Emmanuel Fonseca, Lankeswar Dey +50

Trojan asteroids are found in the equilateral triangle Lagrange points of the Sun-Jupiter system in great number, though they also exist less prolifically in other parts of the Sol…

astro-ph.HE2025★ 7 cited

Near-Infrared Spectroscopy and Detection of Carbon Monoxide in the Type II Supernova SN 2023ixf

Seong Hyun Park, Jeonghee Rho, Sung-Chul Yoon +33

Core-collapse supernovae (CCSNe) may contribute a significant amount of dust in the early universe. Freshly formed coolant molecules (e.g., CO) and warm dust can be found in CCSNe…

astro-ph.HE2025★ 2 cited

GReX: An Instrument Overview and New Upper Limits on the Galactic FRB Population

K. A. Shila, S. Niedbalski, L. Connor +14

We present the instrument design and initial results for the Galactic Radio Explorer (GReX), an all-sky monitor for exceptionally bright transients in the radio sky. This instrumen…

astro-ph.HE2025★ 10 cited

Large Cold Dust Reservoir Revealed in Transitional SN Ib 2014C by James Webb Space Telescope Mid-Infrared Spectroscopy

Samaporn Tinyanont, Ori D. Fox, Melissa Shahbandeh +32

Supernova (SN) 2014C is a rare transitional event that exploded as a hydrogen-poor, helium-rich Type Ib SN and subsequently interacted with a hydrogen-rich circumstellar medium (CS…

astro-ph.HE2025★ 3 cited

Rapid Construction of Joint Pulsar Timing Array Datasets: The Lite Method

Bjorn Larsen, Chiara M. F. Mingarelli, Paul T. Baker +41

The International Pulsar Timing Array (IPTA)'s second data release (IPTA DR2) combines decades of observations of 65 millisecond pulsars from 7 radio telescopes. IPTA datasets shou…

astro-ph.HE2024★ 4 cited

Inference on inner galaxy structure via gravitational waves from supermassive binaries

Yifan Chen, Matthias Daniel, Daniel J. D'Orazio +107

The detection of a stochastic gravitational wave background by pulsar-timing arrays indicates the presence of a population of supermassive black hole binaries. Although the observe…

astro-ph.HE2024★ 5 cited

Exploring pulsar timing precision: A comparative study of polarization calibration methods for NANOGrav data from the Green Bank Telescope

Lankeswar Dey, Maura A. McLaughlin, Haley M. Wahl +32

Pulsar timing array experiments have recently uncovered evidence for a nanohertz gravitational wave background by precisely timing an ensemble of millisecond pulsars. The next sign…

astro-ph.HE2024★ 35 cited

Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5

P. V. Padmanabh, S. M. Ransom, P. C. C. Freire +23

We report the discovery of ten new pulsars in the globular cluster Terzan 5 as part of the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed Terzan 5 a…

astro-ph.HE2024★ 51 cited

A JWST Survey of the Supernova Remnant Cassiopeia A

Dan Milisavljevic, Tea Temim, Ilse De Looze +43

We present initial results from a JWST survey of the youngest Galactic core-collapse supernova remnant Cassiopeia A (Cas A), made up of NIRCam and MIRI imaging mosaics that map emi…

astro-ph.HE2023★ 8 cited

The expansion of the GRB 221009A afterglow

S. Giarratana, O. S. Salafia, M. Giroletti +14

We observed -ray burst (GRB) 221009A using very long baseline interferomety (VLBI) with the European VLBI Network (EVN) and the Very Long Baseline Array (VLBA), over a period sp…

astro-ph.HE2023★ 17 cited

The NANOGrav 12.5-year data set: A computationally efficient eccentric binary search pipeline and constraints on an eccentric supermassive binary candidate in 3C 66B

Gabriella Agazie, Zaven Arzoumanian, Paul T. Baker +85

The radio galaxy 3C 66B has been hypothesized to host a supermassive black hole binary (SMBHB) at its center based on electromagnetic observations. Its apparent 1.05-year period an…

astro-ph.HE2023★ 16 cited

Photometry of Type II Supernova SN 2023ixf with a Worldwide Citizen Science Network

Lauren A. Sgro, Thomas M. Esposito, Guillaume Blaclard +88

We present highly sampled photometry of the supernova (SN) 2023ixf, a Type II SN in M101, beginning 2 days before its first known detection. To gather these data, we enlisted the g…

astro-ph.HE2023★ 45 cited

Detection of ultra-fast radio bursts from FRB 20121102A

M. P. Snelders, K. Nimmo, J. W. T. Hessels +7

Fast radio bursts (FRBs) are extragalactic transients with typical durations of milliseconds. FRBs have been shown, however, to fluctuate on a wide range of timescales: some show s…

astro-ph.HE2023★ 41 cited

The NANOGrav 15-year Gravitational-Wave Background Methods

Aaron D. Johnson, Patrick M. Meyers, Paul T. Baker +93

Pulsar timing arrays (PTAs) use an array of millisecond pulsars to search for gravitational waves in the nanohertz regime in pulse time of arrival data. This paper presents rigorou…

astro-ph.HE2023★ 9 cited

Variability of extragalactic X-ray jets on kiloparsec scales

Eileen T. Meyer, Aamil Shaik, Yanbo Tang +10

Unexpectedly strong X-ray emission from extragalactic radio jets on kiloparsec scales has been one of the major discoveries of Chandra, the only X-ray observatory capable of sub-ar…

astro-ph.HE2023★ 24 cited

SN 2022acko: the First Early Far-Ultraviolet Spectra of a Type IIP Supernova

K. Azalee Bostroem, Luc Dessart, D. John Hillier +41

We present five far- and near-ultraviolet spectra of the Type II plateau supernova, SN 2022acko, obtained 5, 6, 7, 19, and 21 days after explosion, all observed with the Hubble Spa…

astro-ph.HE2022★ 26 cited

SN 2022ann: A type Icn supernova from a dwarf galaxy that reveals helium in its circumstellar environment

K. W. Davis, K. Taggart, S. Tinyanont +64

We present optical and near-infrared (NIR) observations of the Type Icn supernova (SN Icn) 2022ann, the fifth member of its newly identified class of SNe. Its early optical spectra…

astro-ph.HE2022★ 12 cited

SN 2019ewu: A Peculiar Supernova with Early Strong Carbon and Weak Oxygen Features from a New Sample of Young SN Ic Spectra

Marc Williamson, Christian Vogl, Maryam Modjaz +17

With the advent of high cadence, all-sky automated surveys, supernovae (SNe) are now discovered closer than ever to their dates of explosion. However, young pre-maximum light follo…

astro-ph.HE2022★ 15 cited

Photometric and spectroscopic analysis of the Type II SN 2020jfo with a short plateau

B. Ailawadhi, R. Dastidar, K. Misra +34

We present high-cadence photometric and spectroscopic observations of SN~2020jfo in ultraviolet and optical/near-infrared bands starting from to days after the…

astro-ph.HE2022★ 8 cited

Near-Infrared and Optical Observations of Type Ic SN 2021krf: Luminous Late-time Emission and Dust Formation

Aravind P. Ravi, Jeonghee Rho, Sangwook Park +29

We present near-infrared (NIR) and optical observations of the Type Ic supernova (SN Ic) SN 2021krf obtained between days 13 and 259 at several ground-based telescopes. The NIR spe…