Table 1.
Breakdown of FXT candidates as a function of the selection criteria proposed in Sect. 2.7.
| Criterion | Candidates |
|||
|---|---|---|---|---|
| # constrained | # total removed | # uniquely removed | # remaining | |
| (a) | (b) | (c) | (d) | (e) |
| (1) Archival X-ray data | 134 ( * ) | 53 | 20 | 98 |
| (2) Cross-match with stars (Gaia) | 151 | 83 | 42 | 42 |
| (3) NED + SIMBAD + VizieR | 151 | 75 | 33 | 9 |
| (4) Archival images ( † ) | – | – | – | 9 |
| (5) Instrumental and variability effects ( † ) | – | 1 | 1 | 8 |
Notes. Column (a): criterion. Column (b): number of candidates constrained by this criterion. Column (c): number of candidates removed that would be cut at this stage if we disregard all previous stages. Column (d): number of candidates that are solely removed by this criterion, and not any other. Column (e): running total number of candidates that remain after applying this criterion. ( * )Candidates with additional Chandra-ACIS, XMM-Newton, or Swift-XRT observations. ( † )It is important to note that criteria 4 and 5 are only applied to the sources that remain after the first three criteria are applied.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.