Erratum: Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population

Details Erratum: Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population Erratum: Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...551..597f&link_type=abstract

The Astrophysical Journal, Volume 551, Issue 1, pp. 597-597.

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In the paper ``Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population'' by A. S. Fruchter and W. M. Goss (ApJ, 536, 865 [2000]), because of a clerical error, the position reported for the source in NGC 6544 is incorrect. We thank Scott Ransom, who first noticed that our source position appeared to differ substantially from the cluster center as determined by Shawl & White (1986). We provide here in Table 1 our measured 20 and 90 cm positions for the radio source in NGC 6544, as well as the optical position of the cluster (Shawl & White 1986). As noted in the original paper, although the 20 and 90 cm positions differ, the large statistical uncertainty in the 90 cm position and the calibration difficulties associated with observing at 90 cm at low declinations lead us to believe that these two positions are consistent. The 20 cm position differs from that of the optical center of Shawl & White by approximately 4". The surface brightness profile of this cluster is unusual in that it shows two breaks, one at about 3" and the other around 12", either of which might be identified as the core radius (Trager, King, & Djorgovski 1995), although either association would be suspect because of the odd light profile of the cluster. We note that Ransom and colleagues (Ransom et al. 2001) have now discovered a binary 3 ms radio pulsar in NGC 6544, which most likely corresponds to the radio source we report in this paper.

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