SGR 1900+14

Abstract

B. R. Oppenheimer, J. S. Bloom, S. S. Eikenberry, and K. Matthews, California Institute of Technology, communicate: ``We have obtained narrowband 2.2-micron images of the proposed infrared counterpart to SGR 1900+14 (Vrba et al. 1996, Ap.J. 468, 225) on June 3.486 UT, 4.1 days after the recent bursting activity reported on IAUC 6929. Differential photometry of stars ‘A’ and ‘B’ (the double M stars) and star ‘C’ of Vrba et al. yields m_A-m_B = +0.4 +/- 0.1 and m_A-m_C = +4.5 +/- 0.2 mag, consistent with the measurements of Vrba et al. Over the course of 10 min (ten separate frames), no variability was detected in the double M stars to a limit of 0.1 mag.’’

Publication
IAU Circulars