formed around a black hole. In reference [@Soderberg08] the authors discovered an extremely luminous X-ray outburst that marked the birth of a supernova of Type Ibc. They attributed the X-ray outburst to the break-out of the supernova shock-wave from the progenitor.

The open shell nuclei with a few nucleons outside a doubly magic shell closure are of colossal interest to test the nuclear model predictions. $^{57}$Cu is of paramount importance in this regard to test the pn-QRPA predictions. The *pf*-shell nucleus $^{57}$Cu has a single proton just above the closed core of even-even $^{56}$Ni with Z = N = 28. This simple structure permits far more accurate model calculations than are possible in the middle of a nuclear shell. In particular, a comparison of the low-lying levels of $^{57}$Cu with the well-determined excited states of its mirror nucleus $^{57}$Ni is important for studying the charge symmetry of the nucleus. The doubly magic nature of $^{56}$Ni confers it a stable structure and elements beyond $^{56}$Ni are cooked in the stellar pot only via $^{56}$Ni(p, $\gamma $)$^{57}$Cu reaction. The authors in Ref. [@Schatz98] pointed out that the structure of $^{57}$Cu plays a sumptuous role in the nucleosynthesis of proton-rich nuclei. This points 