New Soft X-ray Transient, XTEJ 1755-324
R. Remillard & A. Levine (MIT), J. Swank, and T. Strohmayer (GSFC) for the RXTE ASM Team at MIT and GSFC.
The All Sky Monitor of the Rossi X-ray Timing Explorer has detected a new X-ray source with a tentative position (J2000): 17h 55m 26s, -32 28.8' (uncertainty 0.1 degrees). The source was first detected late on 1997 July 25 (UT). By 1997 July 28 the flux had increased to 170 mCrab (2-12 keV). The X-ray spectrum is substantially steeper than that of the Crab nebula.
The RXTE PCA conducted a brief observation early on 1997 July 29. PCA scans over the source refine the position to (J2000) 17h 55m 28.6s, -32 28' 39" (uncertainty 1'). The spectrum appears complex, roughly consistent with a 0.7 keV disk black body combined with a hard component that extends above 10 keV. The flux is 2.9e-9 erg per square cm per s at 2-20 keV. The interstellar column density appears to be substantially less than 1.0e22 atoms per square cm.
Optical and radio observations are strongly encouraged.
(taken at Ouda Station)
V-band image on July 31
I-band image on July 31
V-band image on August 2
I-band image on August 2
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