CfA4: LIGHT CURVES FOR 94 TYPE Ia SUPERNOVAE

被引：170

作者：

Hicken, Malcolm ^{[1
]}

Challis, Peter ^{[1
]}

Kirshner, Robert P. ^{[1
]}

Rest, Armin ^{[2
]}

Cramer, Claire E. ^{[3
]}

Wood-Vasey, W. Michael ^{[4
]}

Bakos, Gaspar ^{[1
,5
]}

Berlind, Perry ^{[1
]}

Brown, Warren R. ^{[1
]}

Caldwell, Nelson ^{[1
]}

Calkins, Mike ^{[1
]}

Currie, Thayne ^{[6
]}

de Kleer, Kathy ^{[7
]}

Esquerdo, Gil ^{[8
]}

Everett, Mark ^{[8
]}

Falco, Emilio ^{[1
]}

Fernandez, Jose ^{[1
]}

Friedman, Andrew S. ^{[1
]}

Groner, Ted ^{[1
]}

Hartman, Joel ^{[1
,5
]}

Holman, Matthew J. ^{[1
]}

Hutchins, Robert ^{[1
]}

Keys, Sonia ^{[1
]}

Kipping, David ^{[1
]}

Latham, Dave ^{[1
]}

Marion, George H. ^{[1
]}

Narayan, Gautham ^{[1
]}

Pahre, Michael ^{[1
]}

Pal, Andras ^{[1
]}

Peters, Wayne ^{[1
]}

Perumpilly, Gopakumar ^{[9
]}

Ripman, Ben ^{[1
]}

Sipocz, Brigitta ^{[1
]}

Szentgyorgyi, Andrew ^{[1
]}

Tang, Sumin ^{[1
]}

Torres, Manuel A. P. ^{[1
]}

Vaz, Amali ^{[10
]}

Wolk, Scott ^{[1
]}

Zezas, Andreas ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[3] NIST, Gaithersburg, MD 20899 USA

[4] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[5] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08542 USA

[6] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[7] MIT, Dept Phys, Cambridge, MA 02139 USA

[8] Planetary Sci Inst, Tucson, AZ 85719 USA

[9] Univ S Dakota, Dept Phys, Vermillion, SD 57069 USA

[10] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2012年 / 200卷 / 02期

关键词：

supernovae:; general; HUBBLE-SPACE-TELESCOPE; DARK-ENERGY CONSTRAINTS; PHOTOMETRY DATA RELEASE; INFRARED PHOTOMETRY; LUMINOSITY INDICATORS; IMAGE SUBTRACTION; HOST GALAXIES; CONSTANT; MAGNITUDES; UNIVERSE;

D O I：

10.1088/0067-0049/200/2/12

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present multi-band optical photometry of 94 spectroscopically confirmed Type Ia supernovae (SNe Ia) in the redshift range 0.0055-0.073, obtained between 2006 and 2011. There are a total of 5522 light-curve points. We show that our natural-system SN photometry has a precision of less than or similar to 0.03 mag in BV r'i', less than or similar to 0.06 mag in u', and less than or similar to 0.07 mag in U for points brighter than 17.5 mag and estimate that it has a systematic uncertainty of 0.014, 0.010, 0.012, 0.014, 0.046, and 0.073 mag in BV r'i'u'U, respectively. Comparisons of our standard-system photometry with published SN Ia light curves and comparison stars reveal mean agreement across samples in the range of similar to 0.00-0.03 mag. We discuss the recent measurements of our telescope-plus-detector throughput by direct monochromatic illumination by Cramer et al. This technique measures the whole optical path through the telescope, auxiliary optics, filters, and detector under the same conditions used to make SN measurements. Extremely well characterized natural-system passbands (both in wavelength and over time) are crucial for the next generation of SN Ia photometry to reach the 0.01 mag accuracy level. The current sample of low-z SNe Ia is now sufficiently large to remove most of the statistical sampling error from the dark-energy error budget. But pursuing the dark-energy systematic errors by determining highly accurate detector passbands, combining optical and near-infrared (NIR) photometry and spectra, using the nearby sample to illuminate the population properties of SNe Ia, and measuring the local departures from the Hubble flow will benefit from larger, carefully measured nearby samples.

引用

页数：15

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