First release of Apertif imaging survey data

Adams, Elizabeth A. K.; Adebahr, B.; Blok, W. J. G. de; Denes, H.; Hess, K. M.; Hulst, Jeanette M. van der; Kutkin, A.; Lucero, D. M.; Morganti, R.; Moss, V. A.; Oosterloo, Tom; Orru, E.; Schulz, R.; Amesfoort, A. S. van; Berger, A.; Boersma, O. M.; Bouwhuis, M.; Brink, R. van den; Cappellen, W. A. van; Connor, L.; Coolen, A. H. W. M.; Damstra, S.; Diepen, G. N. J. van; Dijkema, T. J.; Ebbendorf, N.; Grange, Y. G.; Goei, R. de; Gunst, A. W.; Holties, H. A.; Hut, B.; Ivashina, M. V.; Józsa, G. I. G.; Loose, G. M.; J., van Leeuwen,; Maan, Y.; Mancini, M.; Mika, A.; Mulder, H.; Norden, M. J.; Offringa, A. R.; Oostrum, L. C.; Pastor-Marazuela, I.; Pisano, D. J.; Ponomareva, Anna A.; W., Romein, J.; Ruiter, M; Schoenmakers, A. P.; Schuur, D. van der; Sluman, J. J.; Smits, R.; Stuurwold, K. J. C; Verstappen, J.; Vilchez, N. P. E; Vohl, D.; Wierenga, K. J.; Wijnholds, Stefan J.; Woestenburg, E. E. M.; Zanting, A. W.; Ziemke, J.

doi:10.48550/arxiv.2208.05348

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For these three surveys, we obtained the flux densities directly from the above references. We also investigated the RACS at 0.89 GHz, the Faint Images of the Radio Sky at Twenty-centimeters (FIRST; Becker et al 1995), the NRAO Very Large Array Sky Survey (NVSS, Condon et al 1998), and the APERture Tile In Focus array (Apertif, Adams et al 2022) imaging survey at 1.4 GHz, and the VLASS at 3 GHz. The angular resolution and the epoch of each observation are provided in Table A.1.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale VLBI observations of the candidate host galaxy of GRB 200716C

Giroletti

Spingola

et al. 2023

A&A

View full text Add to dashboard Cite

We present the discovery and the subsequent follow up of radio emission from SDSS J130402.36+293840.6 (J1304+2938), the candidate host galaxy of the gamma-ray burst (GRB) GRB 200716C. The galaxy is detected in the RACS (0.89 GHz), the NVSS, the Apertif imaging survey, and the FIRST (1.4 GHz), the VLASS (3 GHz), and in public LOFAR (130-170 MHz), WISE (3.4-22 µm), and SDSS (z, i, r, g, u filters) data. The luminosity inferred at 1.4 GHz is (5.1±0.2)×10 30 erg s −1 Hz −1 . To characterise the emission and distinguish between different components within the galaxy, we performed dedicated, high-sensitivity and high-resolution observations with the European VLBI Network (EVN) + e-MERLIN at 1.6 and 5 GHz. We did not detect any emission from a compact core, suggesting that the presence of a radio-loud active galactic nucleus (AGN) is unlikely, and therefore we ascribe the emission observed in the public surveys to star-forming regions within the galaxy. We confirm and refine the redshift estimate, z = 0.341 ± 0.004, with a dedicated Telescopio Nazionale Galileo (TNG) spectroscopic observation. Finally, we compiled a list of all the known hosts of GRB afterglows detected in radio and computed the corresponding radio luminosity: if GRB 200716C belongs to J1304+2938, this is the third most radio-luminous host of a GRB, implying one of the highest star-formation rates (SFRs) currently known, namely SFR ∼ 324±61 M yr −1 . On the other hand, through the analysis of the prompt emission light curve, recent works suggest that GRB 200716C might be a short-duration GRB located beyond J1304+2938 and gravitationally lensed by an intermediate-mass black hole (IMBH) hosted by the galaxy. Neither the public data nor our Very Long Baseline Interferometry (VLBI) observations can confirm or rule out the presence of an IMBH acting as a (milli-)lens hosted by the galaxy, a scenario still compatible with the set of radio observations presented in this work.

show abstract

Section: Introductionmentioning

confidence: 99%