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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 05129naa a2200601 4500 | |
| 001 | oai:research.chalmers.se:f50aa245-5fdd-4c3c-a952-99bffeafeb9f | |
| 003 | SwePub | |
| 008 | 240215s2024 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://doi.org/10.3847/1538-4365/acf7b92 DOI |
| 024 | 7 | a https://research.chalmers.se/publication/5398192 URI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Deka, P. P.u Inter-University Centre for Astronomy and Astrophysics (IUCAA)4 aut |
| 245 | 1 0 | a The MeerKAT Absorption Line Survey (MALS) Data Release. I. Stokes I Image Catalogs at 1-1.4 GHz |
| 264 | 1 | c 2024 |
| 338 | a electronic2 rdacarrier | |
| 520 | a The MeerKAT Absorption Line Survey (MALS) has observed 391 telescope pointings at the L band (900-1670 MHz) at delta less than or similar to +20 degrees. We present radio continuum images and a catalog of 495,325 (240,321) radio sources detected at a signal-to-noise ratio (S/N) > 5 over an area of 2289 deg(2) (1132 deg(2)) at 1006 MHz (1381 MHz). Every MALS pointing contains a central bright radio source (S 1 GHz greater than or similar to 0.2 Jy). The median spatial resolution is 12 ''(8 ''). The median rms noise away from the pointing center is 25 mu Jy beam(-1) (22 mu Jy beam-1) and is within similar to 15% of the achievable theoretical sensitivity. The flux density scale ratio and astrometric accuracy deduced from multiply observed sources in MALS are <1% (8% scatter) and 1 '', respectively. Through comparisons with NVSS and FIRST at 1.4 GHz, we establish the catalog's accuracy in the flux density scale and astrometry to be better than 6% (15% scatter) and 0.'' 8, respectively. The median flux density offset is higher (9%) for an alternate beam model based on holographic measurements. The MALS radio source counts at 1.4 GHz are in agreement with literature. We estimate spectral indices (alpha) of a subset of 125,621 sources (S/N > 8), confirm the flattening of spectral indices with decreasing flux density, and identify 140 ultra-steep-spectrum (alpha < -1.3) sources as prospective high-z radio galaxies (z > 2). We have identified 1308 variable and 122 transient radio sources comprising primarily active galactic nuclei that demonstrate long-term (26 yr) variability in their observed flux densities. The MALS catalogs and images are publicly available at https://mals.iucaa.in. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 700 | 1 | a Gupta, N.u Inter-University Centre for Astronomy and Astrophysics (IUCAA)4 aut |
| 700 | 1 | a Jagannathan, P.u National Radio Astronomy Observatory4 aut |
| 700 | 1 | a Sekhar, S.u National Radio Astronomy Observatory4 aut |
| 700 | 1 | a Momjian, E.u National Radio Astronomy Observatory4 aut |
| 700 | 1 | a Bhatnagar, S.u National Radio Astronomy Observatory4 aut |
| 700 | 1 | a Wagenveld, J.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
| 700 | 1 | a Kloeckner, H. -R.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
| 700 | 1 | a Jose, J.4 aut |
| 700 | 1 | a Balashev, S. A.u Russian Academy of Sciences4 aut |
| 700 | 1 | a Combes, F.u PSL University Paris4 aut |
| 700 | 1 | a Hilton, M.u University of KwaZulu-Natal,University of Witwatersrand4 aut |
| 700 | 1 | a Borgaonkar, D.u Inter-University Centre for Astronomy and Astrophysics (IUCAA)4 aut |
| 700 | 1 | a Chatterjee, A.4 aut |
| 700 | 1 | a Emig, K. L.u National Radio Astronomy Observatory4 aut |
| 700 | 1 | a Gaunekar, A. N.4 aut |
| 700 | 1 | a Jozsa, G. I. G.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Rhodes University4 aut |
| 700 | 1 | a Klutse, D. Y.u University of KwaZulu-Natal4 aut |
| 700 | 1 | a Knowles, K.u Rhodes University4 aut |
| 700 | 1 | a Krogager, J. -k.u Université de Lyon4 aut |
| 700 | 1 | a Mohapatra, A.u Inter-University Centre for Astronomy and Astrophysics (IUCAA)4 aut |
| 700 | 1 | a Moodley, K.u University of KwaZulu-Natal4 aut |
| 700 | 1 | a Muller, Sebastien,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mullers |
| 700 | 1 | a Noterdaeme, P.4 aut |
| 700 | 1 | a Petitjean, P.4 aut |
| 700 | 1 | a Salas, P.4 aut |
| 700 | 1 | a Sikhosana, S.u University of KwaZulu-Natal4 aut |
| 710 | 2 | a Inter-University Centre for Astronomy and Astrophysics (IUCAA)b National Radio Astronomy Observatory4 org |
| 773 | 0 | t Astrophysical Journal, Supplement Seriesg 270:2q 270:2x 1538-4365x 0067-0049 |
| 856 | 4 | u https://research.chalmers.se/publication/539910/file/539910_Fulltext.pdfx primaryx freey FULLTEXT |
| 856 | 4 8 | u https://doi.org/10.3847/1538-4365/acf7b9 |
| 856 | 4 8 | u https://research.chalmers.se/publication/539819 |
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- Jozsa, G. I. G.
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