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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
Password Certification: Ori D. Fox (ofox@virginia.edu)

Subjects: Infra-Red, Nova, Supernova

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)      ------------------------------------------------------------------------------------------------------          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)      


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