SIMBAD references

D. K. Ojha, S. K. Ghosh, and S. S. Kaurav, Tata Institute of Fundamental Research, Mumbai; B. C. Bhatt and D. K. Sahu, Indian Institute of Astrophysics, Bangalore; and A. Tej, Indian Institute of Space Science and Technology, Thiruvananthapuram, report the following optical and near-infrared magnitudes of the young eruptive star V1647 Ori (cf. IAUCs 8284, 8354, 8396, 8600, 8681, 8694), made with the 2-m Himalayan Chandra telescope (+ HFOSC spectrograph and NIR camera) at Hanle (Ladakh) and the 2-m IUCAA Girawali telescope (+ IFOSC spectrograph) at Girawali (Pune): Sept. 14 UT, V = 18.92 ± 0.03, R = 17.03 ± 0.02, I = 14.91 ± 0.01; Oct. 19, J = 10.64 ± 0.01, H = 9.01 ± 0.01, K = 7.63 ± 0.01 (measured in a 7".2-radius aperture); Nov. 3, V = 18.91 ± 0.03, R = 17.09 ± 0.02. No significant variation in brightness of V1647 Ori was seen during the period of about two months since the recent new outburst phase (cf. IAUCs 8968, 8969). In comparison with the last reported quiescent phase (cf. Ojha et al. 2006, MNRAS 368, 825), there has been a brightening of about 3 magnitudes in R, and the infrared colors suggest that circumstellar matter of A_v about 7.5 mag has probably been cleared during this recent outburst. Flux-calibrated optical spectra of V1647 Ori obtained from Sept. 14-Dec. 5 show strong H_alpha emission with blue-shifted P-Cyg absorption and the Ca II triplet lines in emission. The dip in the P-Cyg profile appears to occur around 655.2 nm, which indicates an in-fall velocity of the order of about 500 km/s. The equivalent widths of the H_alpha and Ca II lines are about -2.5 and -1.0 nm, respectively, which are similar to the values seen in the previous outburst (Ojha et al., op.cit.). Regular monitoring of V1647 Ori is underway in optical and near-infrared wavebands.