1 / 15

OSSERVATIONS OF SN 2002er

OSSERVATIONS OF SN 2002er. Giuliano Pignata ESO – Universit á di Padova. Ringberg March 10-15, 2003. SN 2002er IN UGC 10743. Discovered on August 23.2 IAUC 7959 (Wood-Vasey et al.) RA = 17 11 29.88 DE = 07 59 44.8 Classified on August 26.9 IAUC 7961 (Smartt et al.)

tracen
Download Presentation

OSSERVATIONS OF SN 2002er

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. OSSERVATIONS OF SN 2002er Giuliano Pignata ESO – Universitá di Padova Ringberg March 10-15, 2003

  2. SN 2002er IN UGC 10743 Discovered on August 23.2 IAUC 7959 (Wood-Vasey et al.) RA = 17 11 29.88 DE = 07 59 44.8 Classified on August 26.9 IAUC 7961 (Smartt et al.) Vr = 2568 Km/sec Ringberg March 10-15, 2003

  3. PHOTOMETRIC OBSERVATIONS 45 epochs from 7 days before B maximum to 40 days after 9 instruments used Quite good agreement between the different measurements with some exceptions !! Ringberg 2003 March 10-15

  4. THE INSTRUMENTS AF = 1.8m+AFOSC DF = 1.5m+DFOSC WM = 0.8m+MONICA V B-V = -0.298 • CS =2.2m+CAFOS+LORAL I R-I = 0.236 CS =2.2m+CAFOS+SITE  I R-I = 0.209 SS = SSO 2.3m JJ= 1.0m(JKT)+JAG TD = TNG+DOLORES Ringberg 2003 March 10-15 TD = 3.5m+MOSCA

  5. LIGHT CURVES Umax (0) = 14.72 ± 0.03 Bmax (0) = 14.88 ± 0.02 Vmax (+4) = 14.58 ± 0.03 Rmax (+4) = 14.42 ± 0.03 Imax (-1) = 14.44 ± 0.03 Δm15(B)obs = 1.26 ± 0.04 Δm15(B)true = 1.29 ± 0.04 Ringberg 2003 March 10-15

  6. Δm15(B) true (Phillips et al. 1999) RB = AB/E(B-V) AB is function of the SNphase Δm15(B) true Δm15(B) obs + 0.1·E(B-V) Ringberg 2003 March 10-15

  7. COLOR CURVES (U-B ) max = -0.16 (B-V) max = 0.23 Ringberg 2003 March 10-15

  8. COLOR CURVES (V-R) max = 0.19 (V-I) max = -0.02 Ringberg 2003 March 10-15

  9. REDDENING E(B-V)MW = 0.16 (Schlegel et al. 1998) E(B-V)host ~ E(B-V)MW E(B-V)tot~ 0.30 IAU 7061 (Smartt, S. J. Patat, F. Meikle, P.) Equivalent width of the Na I D line host galaxy is 0.11 ± 0.01 Equivalent width of the Na I D line Milky Way is 0.12 ± 0.01 Ringberg 2003 March 10-15

  10. REDDENING E(B-V)tail = 0.40 ± 0.06 Lira 1995 Only 4 points between phase 30 and 90 E(B -V)tail not well estimated E(B-V)max = 0.28 ± 0.03 Phillips et al. 1999 E(B-V)wang = 0.25 ± 0.04 Wang et al. 2003 More and independent information on the reddening will come from the synthetic spectra analysis (Mazzali) Ringberg 2003 March 10-15

  11. E(B-V)FROM LIRA RELATION (B-V)0 = 0.725 – 0.0118 · (tv – 60) E(B-V)tail = (B –V)obs – (B-V)0with 30 < tv < 90 SNe with low extinction in the host galaxy, cover a wide range of Δm15 (Phillips et al. 1999)  n = 6 σ = 0.04  Lira 1995 Ringberg 2003 March 10-15

  12. E(B-V) FROM PHILLIPS RELATION SNe with E(B-V)tail < 0.06cover a wide range of Δm15 (Phillips et al. 1999) (Bmax –Vmax)0 = (-0.070 ± 0.012) + (0.114 ± 0.037)·(Δm15(B) –1.1) E(B-V) = (Bmax –Vmax)obs –(Bmax –Vmax)0  n = 14 σ = 0.03  Δm15(B) Ringberg 2003 March 10-15

  13. E(B-V)FROM “CMAGIC” RELATION SNe with (B – V)max< 0.05 cover a wide range of Δm15 (Wang et al. 2003)  ε0 = (-0.118 ± 0.013) + (0.249 ± 0.043) (Δm15 – 1.1) Relation between ε(B-V) and (B – V)max  B = BBV + βBV (B-V)  ε(B-V) = (-0.051 ± 0.011) + (1.000 ± 0.067) (B – V)max E(B-V) = ε(B-V) - ε0 Ringberg 2003 March 10-15

  14. THE ABSOLUTE MAGNITUDE E(B-V) = 0.28  AB = 1.21 ± 0.13 Vr = 2568  μ = 32.79 ± 0.28  Bmax = -19.12 ± 0.31 Δm15 = 1.29 ± 0.04 ( Hamuy et al.1996 )  Bmax = - 19.09 ± 0.33 H0 = 71 ± 4 (Spergel et al. 2003) RB = 4.315 (Schlegel and Douglas 1998 ) Ringberg 2003 March 10-15

  15. CONCLUSIONS • Good photometric coverage, but no excellent absolute calibration • SN 2002er resembles a “normal” type Ia supernova, but some differences arise especially in the I band • More information will come from spectra analysis (Kotak) and bolometric light curve (Stritzinger) Ringberg 2003 March 10-15

More Related