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ATEL # 1403; P. J. Brown (PSU) and S. Immler (NASA/UMCP/GSFC), on behalf of the Swift satellite team
on 29 Feb 2008; 21:08 UT
Password Certification: Peter J. Brown (email@example.com)
Subjects: Optical, Ultra-Violet, X-ray, Nova, Supernova
Swift Ultraviolet/Optical Telescope (UVOT) observed the Type II (possibly IIb) SN 2008aq (CBET #1271) on 2008-02-28.91 UT. The following UVOT magnitudes were measured: v = 16.4 (401 s exposure time), b = 16.8 (315 s), u = 16.7 (314 s), uvw1 [181-321nm] = 17.9 (629 s), and uvw2 [112-264 nm] = 18.1 (1259 s). Errors are about 0.1 mag. These magnitudes are on the UVOT photometric system (see GCN #6614) which in the optical is close to the Johnson UBV. The magnitudes have not been corrected for extinction.
No X-ray source is detected at the position of SN 2008aq in the merged 4.9 ks Swift XRT observation obtained simultaneously with the UVOT observations. The 3-sigma upper limit to the XRT net count rate is 2.5E-03 cts/s, corresponding to an unabsorbed (0.2-10 keV band) X-ray flux of <1.3E-13 ergs/cm/cm/s and a luminosity of <1.8E40 ergs/s for an adopted thermal plasma spectrum with a temperature of kT = 10 keV, a Galactic foreground column density of N_H = 3.54E+20 (Dickey & Lockman, 1990, ARAA 28) and a distance of 34 Mpc (z= 0.007972, NED; H_o = 71 km/s/Mpc, Omega_M = 1/3, Omega_L = 2/3).
Swift Supernova Website