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ASCA-Related IAU Circulars

Circular #: 5753
Title: Supernova 1993J in NGC3031
Comments: 37,000 second obs with GIS and SIS Lx ~ 5 x 1039 ers/s (1-10 keV) brem: kT > 10 keV, NH about 1021 cm-2
Authors: Y. Tanaka and the ASCA Team

Circular #: 5851
Title: GRO J1008-57
Comments: 93.6 second pulsar observed; double-peaked pulse profile; power law: phot ind = 1, NH about 1.3 x 1022 cm-2; Fx = 6 x 10-10 ergs/cm2/s (2-10 keV)
Authors: Y. Tanaka and the ASCA Team

Circular #: 5851
Title: GRO J0422+32
Comments: Observed X-ray source at GRO position Fx = 2 x 10-11 ergs/cm2/s (0.5-10 keV) power law: phot ind = 1.6
Authors: Y. Tanaka and the ASCA Team

Circular #: 5877
Title: X-ray Nova in Ophiuchus
Comments: Detection near edge of GRANAT/SIGMA error circle, Fx = 0.2 4 Crab (0.5-10 keV) rapid fluctuations of large amplitudes on timescales less than 1 sec.; power law: phot ind = 1.6, NH about 4 x 1021 cm-2
Authors: Y. Tanaka and the ASCA Team

Circular #: 5880
Title: SGR 1806-20
Comments: Observed burst in 4-sec time bin co-incident with BASTE g-ray burst. Also observed new X-ray source co-incident with radio source (18h 05m 42s -20d25m10s (1950)), Fx = 0.2 mCrab (0.5-10 keV) with heavy absorption. Tentatively identified as counterpart to SGR 1806-20.
Authors: Y. Tanaka and the ASCA Team

Circular #: 5888
Title: X-ray Nova in Vela
Comments: Observed GRS 1009-45 in BATSE error box brem: kT ~ 0.6 keV with hard tail; Fx = 2 x 10-8 ergs/cm2/s (1-10 keV)
Authors: Y. Tanaka and the ASCA Team

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