SIMBAD references

M. Orio, Istituto Nazionale di Astrofisica, Torino, and University of Wisconsin; S. G. Starrfield, Arizona State University; and E. Tepedenlegliolu, University of Wisconsin, report that V838 Mon was observed with Chandra (+ ACIS-S) on Feb. 23 for 6800 s, and it was not detected with a 3-sigma upper limit to the count rate of approximately 0.04 count/s: "This translates into an upper limit to the unabsorbed flux in the band 0.2-10 keV of F_x </= 6.5 x 10**-14 erg cm**-2 s**-1, assuming N_H = 4.76 x 10**21 cm**-2 [derived from E(B-V) = 0.8 mag; Kimesweger et al. 2002, MNRAS 336, L43] and a plasma emitting at temperature 1 keV, or F_x </= 4.5 x 10**-9 erg cm**-2 s**-1, assuming instead a blackbody emitting with a temperature of 30 eV. Given a distance in the range 2000-6000 pc (Bond et al. 2003, Nature, in press), the above upper limit to the x-ray flux rules out that either the central source, or a wind from it, emits x-ray luminosity at the level observed in symbiotic novae a year after the outburst (see Muerset et al. 1997, A.Ap. 319, 201). This is strong evidence against a nova-like thermonuclear runaway as mechanism for the 2002 outburst of this object."