RXTE/ASM lightcurves of Cen X-4. Blue arrows designate X-ray (Chandra)
observation times. Magenta arrows designate ultraviolet (HST)
observation times. Compiled by Taylor Sipple of Medfield High School, July 3, 2008. Updated by Harry Hausner, July 1 2010.
Instrument Start Date Time on source (s) Julian Date
Chandra 2004 JUN 20 23:34:25.0 11180 2453177.4822337963 UTC
Chandra 2000 JUN 23 01:21:58.0 10540 2451718.5569212963 UTC
IUE 1979 MAY 22 17:15:54.0 3599.844 2444016.219375 UTC
IUE 1979 MAY 23 18:32:38.0 2399.720 2444017.272662037 UTC
IUE 1979 MAY 22 18:20:51.0 2399.720 2444016.2644791667 UTC
IUE 1979 MAY 23 17:47:20.0 2399.717 2444017.2412037037 UTC
IUE 1979 JUN 02 09:14:07.0 2399.717 2444026.8848032407 UTC
IUE 1979 JUN 02 08:34:15.0 2099.484 2444026.8571180556 UTC
HST:FOS 1995 JUL 27 09:36:17.0 179.996 2449925.9001967593 UTC
HST:FOS 1995 JUL 27 09:27:32.0 44.999 249925.8941203704 UTC
HST:FOS 1995 JUL 27 09:51:06.0 270.000 2449925.9104861111 UTC
HST:GHRS 1995 JUL 27 10:05:07.0 7180.802 2449925.9202199074 UTC
HST:GHRS 1995 JUL 27 14:21:07.0 7180.802 2449926.0979976852 UTC
HST:GHRS 1995 JUL 27 17:55:55.0 7180.802 2449926.2471643519 UTC
HST:GHRS 1995 JUL 27 21:20:55.0 8568.000 2449926.389525463 UTC
HST:STIS-SPECTRUM 2004 JUN 20 23:56:12.0 2202.198 2453177.4973611111 UTC
HST:STIS-SPECTRUM 2004 JUN 21 01:14:46.0 2844.174 2453177.5519212963 UTC
HST:STIS-SPECTRUM 1998 APR 01 21:08:13.0 2150.200 2450905.3807060185 UTC
