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Planets in Stellar Clusters Extensive Search. V. Search for planets and identification of 18 new variable stars in the old open cluster NGC 188
B. J. Mochejska, K. Z. Stanek, D. D. Sasselov +7
We have undertaken a long-term project, Planets in Stellar Clusters Extensive Search (PISCES), to search for transiting planets in open clusters. In this paper we present the resul…
Microlensing Event MOA-2007-BLG-400: Exhuming the Buried Signature of a Cool, Jovian-Mass Planet
Subo Dong, I. A. Bond, A. Gould +55
We report the detection of the cool, Jovian-mass planet MOA-2007-BLG-400Lb. The planet was detected in a high-magnification microlensing event (with peak magnification A_max = 628)…
How long should an astronomical paper be to increase its Impact?
Krzysztof Zbigniew Stanek
Naively, one would expect longer papers to have larger impact (i.e., to be cited more). I tested this expectation by selecting all (~30,000) refereed papers from A&A, AJ, ApJ and M…
Deep MMT Transit Survey of the Open Cluster M37 IV: Limit on the Fraction of Stars With Planets as Small as 0.3 R_J
J. D. Hartman, B. S. Gaudi, M. J. Holman +6
We present the results of a deep (15 ~< r ~< 23), 20 night survey for transiting planets in the intermediate age open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD…
Outliers from the Mass--Metallicity Relation II: A Sample of Massive Metal-Poor Galaxies from SDSS
Molly S. Peeples, Richard W. Pogge, K. Z. Stanek
We present a sample of 42 high-mass low-metallicity outliers from the mass--metallicity relation of star-forming galaxies. These galaxies have stellar masses that span log(M_*/M_su…
A New Class of Luminous Transients and A First Census of Their Massive Stellar Progenitors
Todd A. Thompson, Jose L. Prieto, K. Z. Stanek +3
The progenitors of SN 2008S and the 2008 transient in NGC300 were dust-enshrouded, with extremely red mid-infrared (MIR) colors and relatively low luminosities. The transients were…
Outliers from the Mass--Metallicity Relation I: A Sample of Metal-Rich Dwarf Galaxies from SDSS
Molly S. Peeples, Richard W. Pogge, K. Z. Stanek
We have identified a sample of 41 low-mass high--oxygen abundance outliers from the mass--metallicity relation of star-forming galaxies measured by Tremonti et al (2004). These gal…
Discovery of the Dust-Enshrouded Progenitor of SN 2008S with Spitzer
J. L. Prieto, M. D. Kistler, T. A. Thompson +7
We report the discovery of the progenitor of the recent type IIn SN 2008S in the nearby galaxy NGC 6946. Surprisingly, it was not found in deep, pre-explosion optical images of its…
A Survey About Nothing: Monitoring a Million Supergiants for Failed Supernovae
C. S. Kochanek, J. F. Beacom, M. D. Kistler +4
Extragalactic transient searches have historically been limited to looking for the appearance of new sources such as supernovae. It is now possible to carry out a new kind of surve…
Difference Imaging of Lensed Quasar Candidates in the SDSS Supernova Survey Region
Brian C. Lacki, Christopher S. Kochanek, Krzysztof Z. Stanek +2
Difference imaging provides a new way to discover gravitationally lensed quasars because few non-lensed sources will show spatially extended, time variable flux. We test the method…
Short-Hard Gamma-Ray Bursts in Young Host Galaxies: the Effect of Prompt Twins
Krzysztof Belczynski, K. Z. Stanek, Chris L. Fryer
We investigate the effect of including a significant ``binary twin'' population (binaries with almost equal mass stars, q = M2/M1 > 0.95) for the production of double compact objec…
Go Long, Go Deep: Finding Optical Jet Breaks for Swift-Era GRBs with the LBT
X. Dai, P. M. Garnavich, J. L. Prieto +20
Using the 8.4m Large Binocular Telescope, we observed six GRB afterglows from 2.8 hours to 30.8 days after the burst triggers to systematically probe the late time behaviors of aft…
A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
Joshua Pepper, K. Z. Stanek, Richard W. Pogge +5
The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of…
Deep MMT Transit Survey of the Open Cluster M37 I: Observations and Cluster Parameters
J. D. Hartman, B. S. Gaudi, M. J. Holman +6
We have conducted a deep ($15 \la r \la 23$), 20 night survey for transiting planets in the intermediate age open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD cam…
LBT Discovery of a Yellow Supergiant Eclipsing Binary in the Dwarf Galaxy Holmberg IX
J. L. Prieto, K. Z. Stanek, C. S. Kochanek +14
In a variability survey of M81 using the Large Binocular Telescope we have discovered a peculiar eclipsing binary (MV ~ -7.1) in the field of the dwarf galaxy Holmberg IX. It has a…
An Unexpectedly Swift Rise in the Gamma-ray Burst Rate
Matthew D. Kistler, Hasan Yuksel, John F. Beacom +1
The association of long gamma-ray bursts with supernovae naturally suggests that the cosmic GRB rate should trace the star formation history. Finding otherwise would provide import…
Characterizing Supernova Progenitors via the Metallicities of their Host Galaxies, from Poor Dwarfs to Rich Spirals
Jose L. Prieto, Krzysztof Z. Stanek, John F. Beacom
We investigate how the different types of supernovae are relatively affected by the metallicity of their host galaxy. We match the SAI Supernova Catalog to the SDSS-DR4 catalog of…
The Future is Now: the Formation of Single Low Mass White Dwarfs in the Solar Neighborhood
Mukremin Kilic, K. Z. Stanek, M. H. Pinsonneault
Low mass helium-core white dwarfs (M < 0.45 Msun) can be produced from interacting binary systems, and traditionally all of them have been attributed to this channel. However, a lo…
A Modest Proposal for the Astronomical Community
Krzysztof Zbigniew Stanek
Inspired by a recent astro-ph posting, I propose a creation of an Alternative History astro-ph archive (althistastro-ph). Such an archive would serve as a final resting place for t…
A Study of Stellar Photometric Variability Within the Central 4 pc of the Galactic Center with Infrared Image Subtraction
Molly S. Peeples, K. Z. Stanek, D. L. DePoy
We present a catalog of 110 variable stars within ~1' of Sgr A* based on image subtraction of near-infrared (H and K) photometry. Our images were obtained over 133 nights from 2000…
A Search for Transiting Hot Planets as Small as Neptune in the Open Cluster M37
J. D. Hartman, B. S. Gaudi, M. J. Holman +3
We are conducting a transit survey of the open cluster M37 using the Megacam instrument on the 6.5 m Multiple-Mirror Telescope. We have obtained ~4500 images of this cluster over 1…
Measured Metallicities at the Sites of Nearby Broad-Lined Type Ic Supernovae and Implications for the SN-GRB Connection
M. Modjaz, L. Kewley, R. P. Kirshner +6
We compare the chemical abundances at the sites of 12 nearby (z <0.14) Type Ic supernovae (SN Ic) that showed broad lines, but had no observed Gamma-Ray Burst (GRB), with the chemi…
Strongly Variable z=1.48 FeII and MgII Absorption in the Spectra of z=4.05 GRB 060206
H. Hao, K. Z. Stanek, A. Dobrzycki +9
We report on the discovery of strongly variable FeII and MgII absorption lines seen at z=1.48 in the spectra of the z=4.05 GRB 060206 obtained between 4.13 to 7.63 hours (observer…
HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting one Member of a Stellar Binary
G. A. Bakos, R. W. Noyes, G. Kovacs +16
Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402 AB. This system is a pai…