[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
[vsnet-campaign-xray 117] XTE J1650-500 large-amplitude oscillations
XTE J1650-500 large-amplitude oscillations
According to IAUC 7837, Tomsick et al. report that this blackhole candidate
X-ray transient is exhibiting large-amplitude variations with a period
of 13.5-14.0 d. They suggested that the period may correspond to the
disk-precession as seen in HZ Her (Her X-1). See IAUC 7837 for further
detailed information. This finding may suggest the presence of superhump-type
variation (not necessarily close to 13.5-14.0 d, but likely much shorter)
in optical wavelangths. Time-series observations are strong encouraged.
(cf. XTE J1118+480 = KV UMa, the best-observed example of superhumps and
precession in a blackhole transient).
Position of the object:
According to IAUC 7707, the following variable object (possible optical
counterpart) has been identified with the new X-ray transient (reported by
Castro-Tirado et al.).
16h 50m 01s.0
-49o 57' 45"
(J2000.0, error=2")
The preliminary magnitude is reported as B=17. Given the likely large
interstellar reddening, the object could be observable with a CCD.
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page