This catalogue provides read-out-streak photometry for sources in XMM-SUSS3 which are too bright in a particular band for reliable photometry through the normal direct measurement process, given flag 11 (2048) in the XMM-SUSS3 catalogue.
In a number of circumstances, including crowded fields, explicit source confusion and sources which are too bright even for the read-out streak method, the read-out streak photometry is not deemed to be reliable. Therefore the number of photometric measurements in the supplementary catalogue is lower than the number of measurements within XMM-SUSS3 which are flagged as having too high a count rate for standard photometry.
The read-out-streak photometry method, and the construction of the supplementary catalogue are described in detail in Page et al. (2017, MNRAS 466, 1061). The supplementary catalogue table contains a subset of XMM-SUSS3 columns. The first five columns permit each entry to be identified with a unique XMM-SUSS3 source and XMM-Newton OBSID. The remaining 24 columns contain read-out-streak-derived magnitudes and magnitude errors in Vega and AB systems.
The following table contains the following number of magnitude measurements in the corresponding XMM-OM filters:
|Filter||Number of measurements|