Central Bureau for Astronomical Telegrams
IAUC 5512: 1992 JD; 4U 1543-47
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Read IAUC 5513
Circular No. 5512
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
1992 JD
Ephemeris from the orbital elements on IAUC 5511:
1992 TT R. A. (2000) Decl. Delta r Elong. Phase V
May 4.0 14 34.16 + 1 09.7 0.017 1.025 162.6 17.1 17.1
4.5 14 39.32 + 7 03.0 0.018 1.025 156.7 22.9 17.4
5.0 14 44.11 +12 22.1 0.019 1.025 151.3 28.2 17.7
5.5 14 48.55 +17 06.6 0.020 1.026 146.4 32.9 18.0
6.0 14 52.68 +21 18.0 0.021 1.026 142.1 37.1 18.2
6.5 14 56.53 +24 59.2 0.023 1.026 138.3 40.9 18.5
7.0 15 00.12 +28 13.6 0.024 1.026 134.9 44.1 18.7
7.5 15 03.48 +31 04.5 0.026 1.027 131.9 47.0 18.9
8.0 15 06.62 +33 35.0 0.028 1.027 129.3 49.5 19.1
8.5 15 09.57 +35 47.9 0.029 1.027 126.9 51.8 19.3
9.0 15 12.35 +37 45.8 0.031 1.028 124.8 53.8 19.5
9.5 15 14.96 +39 30.6 0.033 1.028 122.9 55.5 19.6
10.0 15 17.42 +41 04.1 0.034 1.028 121.2 57.1 19.8
10.5 15 19.74 +42 28.0 0.036 1.028 119.7 58.5 20.0
11.0 15 21.93 +43 43.4 0.038 1.029 118.3 59.8 20.1
11.5 15 24.01 +44 51.4 0.040 1.029 117.1 61.0 20.2
12.0 15 25.97 +45 53.1 0.042 1.029 115.9 62.0 20.4
4U 1543-47
M. Della Valle and L. Pasquini, European Southern Observatory,
report: "We have observed the optical counterpart of the transient
x-ray source 4U 1543-47 (cf. IAUC 5504). Inspection of a CCD
spectrum (range 380-670 nm, resolution about 2.0 nm), obtained on May
1.3 UT with the 3.6-m telescope (+ EFOSC) at La Silla, reveals
shallow emission lines of H-alpha, N III (464 nm), and He II (469
nm), superimposed on a relatively strong continuum. The other
Balmer lines (H-beta, H-gamma, H-delta, H-epsilon) are clearly
visible in absorption. Strong interstellar Na D (589 nm), Ca II K
(393 nm), and the 624-nm band are present. CCD observations
obtained by J. Eisloffel (Max-Planck-Institut fur Astronomie,
Heidelberg) on May 3.2 UT with the ESO/MPI 2.2-m telescope give V =
14.6 and B-V = +0.7. The new optical brightening is comparable to
that observed by Pedersen et al. in 1983 (IAUC 3858)."
1992 May 4 (5512) Daniel W. E. Green
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