Spitzer Detection of Late-Time (>100 d) Infrared Emission from Warm Dust in 9 Type IIn Supernovae
ATel #2665; Ori D. Fox, Roger A. Chevalier, Michael F. Skrutskie (University of Virginia)
on 8 Jun 2010; 22:44 UT
Credential Certification: Ori D. Fox (ofox@virginia.edu)
Subjects: Infra-Red, Supernovae
Warm Spitzer's Infrared Array Camera (IRAC) observed the locations of 59 Type IIn supernovae with distances <250 Mpc and discovery dates within the past ten years (PID 60122). Nine targets show evidence for late-time mid-infrared emission. The supernovae, coordinates, epochs of observation, and fluxes in IRAC bands 1 & 2 (3.6 & 4.5 microns, respectively) are listed below. The detections suggest the presence of circumstellar dust and we encourage multi-wavelength follow-up observations.
SN RA DEC Date Age Flux IRAC 1 Flux IRAC 2
(UT) (d) (10-17 erg/s/cm2/Ang) (10-17 erg/s/cm2/Ang)
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2008gm 23:14:12.39 -02:46:52.4 Aug. 19.6,2009 301 0.11(0.09) 0.05(0.05)
2008en 00:55:13.56 +35:26:26.2 Aug. 24.3,2009 386 0.70(0.15) 0.50(0.10)
2008cg 15:54:15.15 +10:58:25.0 Aug. 22.6,2009 474 0.69(0.17) 0.52(0.11)
2008J 02:34:24.20 -10:50:38.5 Aug. 30.1,2009 593 5.83(0.42) 4.01(0.28)
2007rt 11:02:34.29 +50:34:58.5 Jan. 01.8,2010 780 3.64(0.35) 2.88(0.25)
2006qq 05:19:50.43 -20:58:06.4 Oct. 13.7,2009 1048 0.32(0.16) 0.35(0.11)
2006jd 08:02:07.43 +00:48:31.5 Dec. 04.6,2009 1149 4.64(0.40) 4.01(0.30)
2005gn 05:48:49.07 -24:22:45.5 Oct. 30.9,2009 1479 0.26(0.10) 0.17(0.06)
2005cp 23:59:30.88 +18:12:09.6 Aug. 22.2,2009 1523 0.58(0.15) 0.45(0.10)
