ATLAS100 – I. A volume-limited sample of supernovae and related transients within 100 Mpc
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ID: 315517
2026
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Abstract
Abstract We present ATLAS100 – a sample of 1729 supernovae and other explosive optical transients within ~100 Mpc observed by the ATLAS survey over a span of 5.75 years from 2017 September 21 to 2023 June 21. The volume-limited sample includes transients associated with galaxies with a spectroscopic redshift of z ≤ 0.025, and spectroscopically classified transients within this redshift threshold where a host redshift was not available in existing catalogues. Our host galaxy list is constructed from aggregating all available galaxy redshift and distance catalogues. We carefully select all transients within a projected radius of 50 kpc of these hosts. The ATLAS100 transient sample has a host galaxy redshift completeness fraction of 83 per cent, consistent with expectations for the redshift completeness of local galaxy catalogues. Within this volume, the spectroscopic classifications are 87 per cent complete and we reclassify many ambiguous transients with joint light curve and spectroscopic considerations. Here, we release the catalogue together with compiled, binned and cleaned ATLAS photometry for all transients. We fit the light curve data to derive peak luminosities and characteristic timescales. We explore the sample characteristics, demographics and discuss the completeness and purity of the sample. This is the first in a series of papers that will explore the rates and physical parameters of a complete and large sample of nearby supernovae and transients brighter than M ≲ −16.
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| Authors | S Srivastav, S J Smartt, T Moore, K W Smith, D R Young, M D Fulton, C R Angus, M Nicholl, H F Stevance, T W Chen, A Pastorello, J Sommer, F Stoppa, J W Tweddle, J P Anderson, M E Huber, A Rest, L Rhodes, L J Shingles, A Aamer, A Clocchiatti, A J Cooper, N Erasmus, J H Gillanders, D Magill, G Pignata, P Ramsden, B P Schmidt, X Sheng, J G Weston, L Denneau, J L Tonry |
| Journal | monthly notices of the royal astronomical society |
| Year | 2026 |
| DOI |
10.1093/mnras/stag1028
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| URL | |
| Keywords | Keywords not found |
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