IP Catalog Update No. 7

In Progress

I'm slowly and sporadically working on the next versison of the IP Catalog, containing (so far) the folloing changes compared with Version 2021. This is being done in a stream-of-consciousness order, but I'm happy to take request on specific objects to update first.

New Designations

No new official variable star names have been given to IPs and candidate IPs by the GCVS group so far, as far as I know.

However, there is one new-to-these-pages designation:

We now use the name Paloma, even though this is an unofficial nickname, for 1RXS J052430.2+424449. The Paloma page also contains a new prefered spin period. (2026 February 1)

Newly Added IPs/IP candidates/non-IPs

Probable IPs
1. Swift J0614.0+1709 is a BAT-detected hard X-ray source with 5 hr, 1412 s, and 1530 s periods in optical photometry (likely to be the orbital, the spin, and the beat periods). While it is likely to be an IP, an independent confirmation (particularly the detection of the spin period in X-rays) is highly desirable. This object page was announced on the Update No. 6 page, but was accidentally omitted from the Version 2021 catalog. (2026 January 23)
2. Swift J170800-402551.8 is a Swift Deep Galactic Plane Survey source with a 13.1 min X-ray period and a CV-like optical spectrum, so it is probably an IP. (2026 January 14)
Possible IPs
1. V6609 Sgr has a strong credential as an eclipsing, stream-fed IP from optical photometry, and is a bright X-ray source. On the other hand, there are no published optical spectra or X-ray timing studies. (2026 January 7)
2. 2PBC J0800.5-3206 is a BAT source whose optical couterpart is a CV with a blue continuum and a strong He II 4686 line, but without published studies of dedicated observations. (2026 January 22)
3. PBC J0826.3-7033 is a BAT source. This may be an unusually X-ray luminous non-magnetic CV or a magnetic CV; however, secure determination and identification of the orbital and/or the spin periods is lacking. (2026 January 8)

Changes in Confidence Level

Newly confirmed systems
1. IGR J18434-0508 has been upgraded to "confirmed" following the X-ray detection of a 304.4 s period, twice the previously reported optical period of 152.5 s. (2026 January 15)
2. Swift J0503.7-2819 has been upgraded to "confirmed" following the detection of the true spin period in X-ray data and in optical photometry. (Note that the originally reported candidate spin period appears to have been a QPO.) (2026 January 6)
Newly classified as "probable"
1. V1082 Sgr has been changed from "doubtful" to "probable" following the detection of periodically modulated optical circular polarization. While this is hard to explain except as the spin period of an IP, the X-ray modulation at a similar X-ray period was not persistent, and this period has never been detected in optical photometry, both of which are puzzling. (2026 January 25)
2. Swift J0746.2-1611 has been changed from "possible" to "probable" following the TESS detection of likely spin and beat periods. However, the messy nature of the X-ray power spectrum suggests that we don't fully understand this system. (2026 January 29)

Other Substantive Changes

For AH Men, the BAT detection has been added, and the position and distance have been corrected from those of position and distances corrected from that of '14.0 mag. star 3" to the WNW' as VSX describes it. (2026 January 25)
The orbital period of V2487 Oph has been added. (2026 January 26)
YY Sex has been confirmed as a polar via detection of strong circular polarization. (2026 January 6)
IGR J15038-6021 has a 1664 s X-ray period. On the other hand, there are no published optical spectra or optical timing studies. (2026 January 13)