The Sloan Digital Sky Survey-II: Photometry and Supernova Ia Light Curves from the 2005 data
Jon A. Holtzman, John Marriner, Richard Kessler, Masao Sako, Ben Dilday, Joshua A. Frieman, Donald P. Schneider, Bruce Bassett, Andrew Becker, David Cinabro, Fr… 展开作者
Jon A. Holtzman, John Marriner, Richard Kessler, Masao Sako, Ben Dilday, Joshua A. Frieman, Donald P. Schneider, Bruce Bassett, Andrew Becker, David Cinabro, Fritz DeJongh, Darren L. Depoy, Mamoru Doi, Peter M. Garnavich, Craig J. Hogan, Saurabh Jha, Kohki Konishi, Hubert Lampeitl, Jennifer L. Marshall, David McGinnis, Gajus Miknaitis, Robert C. Nichol, Jose Luis Prieto, Adam G. Reiss, Michael W. Richmond, Roger Romani, Mathew Smith, Naohiro Takanashi, Kouichi Tokita, Kurt van der Heyden, Naoki Yasuda, Chen Zheng
We present ugriz light curves for 146 spectroscopically confirmed or spectroscopically probable Type Ia supernovae from the 2005 season of the SDSS-II Supernova survey. The light curves have been constructed using a photometric technique that we call scene modelling, which is described in detail here; the major feature is that supernova brightnesses are extracted from a stack of images without spatial resampling or convolution of the image data. This procedure produces accurate photometry along with accurate estimates of the statistical uncertainty, and can be used to derive photometry taken with multiple telescopes. We discuss various tests of this technique that demonstrate its capabilities. We also describe the methodology used for the calibration of the photometry, and present calibrated magnitudes and fluxes for all of the spectroscopic SNe Ia from the 2005 season.
Spectroscopic Determination of the Low Redshift Type Ia Supernova Rate from the Sloan Digital Sky Survey
超新星爆发率与大质量恒星的诞生和演化直接相关。因此，它们是宇宙恒星演化历史的少数直接测量方法之一。在本文中，我们描述了一种概率技术，用于识别超新星光谱样品的星系。我们对52颗Ia型超新星进行了研究，这些超新星的年龄从-14天到+40天不等，它们是从SDSS DR 5的\simeq 50，000个光谱的母样本中提取的。在红移= 0.1处，我们发现超新星速率（SNR）为0.472^{+0.048}-0.039}（系统）^{+0.081}-0.071}（统计）SNu<z>。在1σ低红移时，该值高于其它值，但在3σ水平上是一致的。本研究中使用的52颗超新星候选者是迄今为止用于Ia型超新星速率测定的第三大超新星样本。在本文中，我们展示了潜在的所描述的方法，用于检测超新星在未来的光谱调查。
The B3-VLA CSS sample. VIII: New optical identifications from the Sloan Digital Sky Survey. The ultraviolet-optical spectral energy distribution of the young radio sources
We use the overlap between multiband photometry of the Kilo-Degree Survey (KiDS) and spectroscopic data based on the Sloan Digital Sky Survey (SDSS) and Galaxy And Mass Assembly (GAMA) to infer the colour-magnitude relation of red-sequence galaxies. We then use this inferred relation to select luminous red galaxies (LRGs) in the redshift range of $0.1<z<0.7$ over the entire KiDS Data Release 3 footprint. We construct two samples of galaxies with different constant comoving densities and different luminosity thresholds. The selected red galaxies have photometric redshifts with typical photo-z e…
Calibration uncertainties have been the leading systematic uncertainty in recent analyses using type Ia Supernovae (SNe Ia) to measure cosmological parameters. To improve the calibration, we present the application of Spectral Energy Distribution (SED)-dependent "chromatic corrections" to the supernova light-curve photometry from the Dark Energy Survey (DES). These corrections depend on the combined atmospheric and instrumental transmission function for each exposure, and they affect photometry at the 0.01 mag (1%) level, comparable to systematic uncertainties in calibration and photometry. Fi…
We present BVRI and unfiltered light curves of 93 Type Ia supernovae (SNe Ia) from the Lick Observatory Supernova Search (LOSS) follow-up program conducted between 2005 and 2018. Our sample consists of 78 spectroscopically normal SNe Ia, with the remainder divided between distinct subclasses (three SN 1991bg-like, three SN 1991T-like, four SNe Iax, two peculiar, and three super-Chandrasekhar events), and has a median redshift of 0.0192. The SNe in our sample have a median coverage of 16 photometric epochs at a cadence of 5.4 days, and the median first observed epoch is ~4.6 days before maximum…
Seitenzahl et al. (2009) have predicted that roughly three years after its explosion, the light we receive from a Type Ia supernova (SN Ia) will come mostly from reprocessing of electrons and X-rays emitted by the radioactive decay chain $^{57}{\rm Co}~\to~^{57}{\rm Fe}$, instead of positrons from the decay chain $^{56}{\rm Co}~\to~^{56}{\rm Fe}$ that dominates the SN light at earlier times. Using the {\it Hubble Space Telescope}, we followed the light curve of the SN Ia SN 2012cg out to $1055$ days after maximum light. Our measurements are consistent with the light curves predicted by the con…
A Precision Multi-Band Two-Epoch Photometric Catalog of 44 Million Sources in the Northern Sky from Combination of the USNO-B and Sloan Digital Sky Survey Catalogs
下一代宽视场光学和无线电测量的一个关键科学驱动力是对时变天空的探索。这些调查将具有前所未有的敏感性和覆盖面，但在比调查寿命更长的时间尺度上发现变化的能力将受到限制。我们提出了一个新的精度，多历元的光度计目录，跨越60年，结合USNO-B和SDSS数据发布9目录。我们重新校准了原始USNO-B星表的测光，并创建了一个星表，其中包含位于北天DR 9足迹中的43，647，887个光学点源的两个测光时期，最多可达5个不同波段。重新校准的对象跨越的幅度范围14 < m < 20，是准确的$\approx$ 0.1马格。我们最大限度地减少虚假的对象和那些不准确的幅度通过识别和删除几个来源的系统误差在两个起源目录，重点虚假的对象，表现出大的视星等变化。在考虑了这些影响之后，我们发现$\approx$ 250，000颗恒星和类星体在USNO-B和SDSS DR 9时期之间显示出显著的（> 4 $σ$）亮度变化。讨论了该星表的历史价值及其在长时标、大振幅变星和类星体研究中的应用。
TITAN DR1: An Improved, Validated, and Systematically-Controlled Recalibration of ATLAS Photometry toward Type Ia Supernova Cosmology
Boston University（波士顿大学）；Johns Hopkins University（约翰斯·霍普金斯大学）；University of Oxford（牛津大学）；University of Southampton（南安普顿大学）；Queen’s University Belfast（贝尔法斯特女王大学）；Duke University（杜克大学）；University of Hawai’i（夏威夷大学）；University of Michigan（密歇根大学）
We present the snapshot distance method (SDM), a modern incarnation of a proposed technique for estimating the distance to a Type Ia supernova (SN Ia) from minimal observations. Our method, which has become possible owing to recent work in the application of deep learning to SN Ia spectra (we use the deepSIP package), allows us to estimate the distance to an SN Ia from a single optical spectrum and epoch of $2+$ passband photometry -- one night's worth of observations (though contemporaneity is not a requirement). Using a compilation of well-observed SNe Ia, we generate snapshot distances acro…
LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations
