Abstract
The X-ray rapid burster MXB1730–335, discovered by Lewin et al.1 has been identified with a compact globular cluster embedded in the midst of the galactic plane and named2 Liller 1. It has an extremely large interstellar extinction (Av = 11 mag) from which Liller2 and Kleinmann et al.4 derived its distance as 10 kpc. Kulkarni et al.3 detected IR bursts in the globular cluster, six times during their 2.5 h observing time on 4–5 April 1979 using a 1-m telescope at Kavalur3. The burst power emitted in H-band was estimated to be 1.6–2.3 × 1030 W. Stimulated by this report, we monitored MXB1730 – 335 using a multi-band IR photometer for about 10 h during April and August 1979. In the latter period, although the X-ray bursts were very active, no coincident IR and X-ray burst could be detected. We show here that this conflicts with previous results by Kulkarni et al.3 and Jones et al.5.
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References
Lewin, W. H. G. et al. Astrophys. J. Lett. 207, L95–L99 (1976).
Liller, W. Astrophys. J. Lett. 213, L21–L23 (1977).
Kulkarni, P. V., Ashok, N. M., Apparao, K. M. V. & Chitre, S. M. Nature 280, 819–820 (1979).
Kleinmann, D. E., Kleinmann, S. G. & Wright, E. L. Astrophys. J. Lett. 210, L83–86 (1976).
Jones, A. W. et al. Nature 283, 550–551 (1980).
Inoue, H. et al. Nature 283, 358–360 (1980).
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Sato, S., Kawara, K., Kobayashi, Y. et al. No IR burst from the X-ray rapid burster MXB1730–335. Nature 286, 688–689 (1980). https://doi.org/10.1038/286688a0
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DOI: https://doi.org/10.1038/286688a0
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