National Aeronautics and Space Administration

IPs

V455 And
V515 And
AE Aqr
FO Aqr
V349 Aqr
XY Ari
V405 Aur
V647 Aur
HT Cam
MU Cam
DW Cnc
BG CMi
V709 Cas
V1025 Cen
V1033 Cas
TV Col
TX Col
UU Col
V2069 Cyg
V2306 Cyg
DO Dra
PQ Gem
V418 Gem
DQ Her
V1323 Her
V1460 Her
V1674 Her
EX Hya
NY Lup
V2400 Oph
V2731 Oph
V3037 Oph
V598 Peg
GK Per
AO Psc
HZ Pup
V667 Pup
WX Pyx
V1223 Sgr
V4743 Sgr
CC Scl
V1062 Tau
EI UMa
AX J1740.1
AX J1832.3
AX J1853.3
CTCV J2056
CXO J174954
IGR J04571
IGR J08390
IGR J15094
IGR J16500
IGR J16547
IGR J17014
IGR J17195
IGR J18151
IGR J18173
IGR J18308
IGR J19267
LAMOST 0240
PBC J0927.8
PBC J1841.1
RX J1804
RX J2015
RX J2113
RX J2133
RX J2306
Swift J0717
Swift J1839
Swift J2006
Swift J2138

Full Catalog

Related Systems

IP Catalog Update No. 2

The IP Catalog Version 2009a, released on 2008 November 4, contains the folloing changes compared with Version 2008a.

16 New Candidate IP

1. IGR J08390-4833 is an INTEGRAL source identified with a likely magnetic CV. Although Chandra data showed a possible 1450s period, this was not confirmed in optical photometry, so I'm classifying this as "possible" for the time being.
2. IGR J16500-3307 is also a INTEGRAL source identified with a likely magnetic CV. Given the lack of further details, I'm classifying this as "possible" for the time being.
3. IGR J19267+1325 is a INTEGRAL source identified in the optical with an object with a magnetic CV-like spectrum. With the Swift/XRT detection of 938.6 s (and also probably 4.58 hr) period(s), it's likely to be an IP and I have classified it "probable" for now. To further raise the status, I'd like to see a refereed publication and/or an independent confirmation.
4. SAX J1452.8-5949 is an BeppoSAX discovered X-ray pulsar, which appears to have a late type, main-sequence mass donor. The possibility that it is an IP should therefore be kept in mind; I'm using "possible" as its status for now.
5. V2467 Cyg (=Nova Cyg 2007) was seen to have a 3.82 hr and 34.64 min optical periods, and was therefore proposed to be an IP candidate. However, since this nova is still in the SSS phase, the optical light is likely to be dominated by reprocessed supersoft emission, which, in several other recent novae, is seen to display multi-periodic or quasiperiodic oscillations. I have therefore classified it as "doubtful."
6. V2275 Cyg (=Nova Cygni 2001 No. 2) has shown a 24.6 min modulation. However, it is argued to be a QPO, rather than a true periodicity, so I'm classifying this as "doubtful."
7. V552 Aur (=Aur2 =NSV 2872) may not even be a CV --- spectroscopy shows just a K star. However, photometry shows low-level flickering as well as a 87.65 min period. One way out of the conundrum is if there is a CV with a 87.65 min orbital period hidden by a foreground K star, possibly.
8. SDSS J093249.57+472523.0 is an eclipsing system whose X-ray and optical spectra suggest it to be a candidate IP. A sensitive search for spin period is highly desirable, most plausibly in the optical. For now, I've classifed it as "possible."
9. Muno et al. (2003; 2008) have found 8 objects near the Galactic Center region of the sky with periodic X-ray variability. Of these, I have classified two (CXOGC J174531.7-290542 and CXOGC J174535.6-290034) as "doutful" due to the excessively lng periods, and the rest (CXOGC J174517.4-290650, CXOGC J174532.3-290251, CXOGC J174534.5-290201, CXOGC J174541.8-290037, CXOGC J174543.4-285841, and CXOGC J174622.7-285218) as "possible."

Changes in Confidence Level