XRF 020427, detection of an underlying system with the 8.2-m VLT

A 2'.5 x 1'.9 field obtained at the 8.2-m VLT at Paranal containing the Chandra position of the likely X-ray afterglow CXOU J220928.2-651932 (GCN 1392) for XRF 020427 (GCN 1383). The blue square is the zoomed region. The image is the co-add of the B- & R-band images. North is up and East to the left.

A 33" x 33" field obtained at the 8.2-m VLT at Paranal containing the Chandra position (yellow circle, 1" error radius) of the likely X-ray afterglow CXOU J220928.2-651932 (GCN 1392) for XRF 020427 (GCN 1383). The underlying object is the candidate host.

GCN CIRCULAR 1439

XRF 020427, detection of an underlying system with the VLT
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A. J. Castro-Tirado and J. Gorosabel, (Instituto de Astrofísica de Andalucía, IAA-CSIC, Granada)
C. Sánchez-Fernández (ESA-VILSPA, Madrid)
N. Lund and S. Brandt (DSRI, Copenhagen)
J. M. Castro Cerón (ROA, San Fernando)
communicate:
"We have observed the field of the XRF 020427 (GCN 1383, 1384, 1386, 1390, 1394) on 11.388-11.397 June 2002 with the 8.2-m VLT telescope at Paranal ESO's observatory (equipped with FORS2). Imagery was obtained in the B- and R-bands (300-s exposure time each) under rather poor seeing conditions (1".2). The position of the likely X-ray afterglow detected by BSAX and followed-up by Chandra (GCN 1387, 1392) is coincident with the north part of a extended (about 4" x 2"), blue object with R = 23.3 +/- 0.2 and B = 23.8 +/- 0.4 which is consistent with the galaxy system reported independently by Fruchter et al. (GCN Circ. 1440). An identification chart is posted at www.iaa.es/~ajct/XRFs/xrf020427"