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Start Over Author "Kaiser, N" Journal monthly notices of the royal astronomical society
31 results on '"Kaiser, N"'

1. 2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary

Author

Deacon, N.R., primary, Magnier, E.A., additional, Liu, Michael C., additional, Schlieder, Joshua E., additional, Aller, Kimberly M., additional, Best, William M.J., additional, Bowler, Brendan P., additional, Burgett, W.S., additional, Chambers, K.C., additional, Draper, P.W., additional, Flewelling, H., additional, Hodapp, K.W., additional, Kaiser, N., additional, Metcalfe, N., additional, Sweeney, W.E., additional, Wainscoat, R.J., additional, and Waters, C., additional

Published
2017
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2. Spectral analysis of four ‘hypervariable’ AGN: a micro-needle in the haystack?

Author

Bruce, A., primary, Lawrence, A., additional, MacLeod, C., additional, Elvis, M., additional, Ward, M. J., additional, Collinson, J. S., additional, Gezari, S., additional, Marshall, P. J., additional, Lam, M. C., additional, Kotak, R., additional, Inserra, C., additional, Polshaw, J., additional, Kaiser, N., additional, Kudritzki, R-P., additional, Magnier, E. A., additional, and Waters, C., additional

Published
2017
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4. Dust in three dimensions in the Galactic plane

Author

Hanson, R. J., primary, Bailer-Jones, C. A. L., additional, Burgett, W. S., additional, Chambers, K. C., additional, Hodapp, K. W., additional, Kaiser, N., additional, Tonry, J. L., additional, Wainscoat, R. J., additional, and Waters, C., additional

Published
2016
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5. Slow-blue nuclear hypervariables in PanSTARRS-1

Author

Lawrence, A., primary, Bruce, A. G., additional, MacLeod, C., additional, Gezari, S., additional, Elvis, M., additional, Ward, M., additional, Smartt, S. J., additional, Smith, K. W., additional, Wright, D., additional, Fraser, M., additional, Marshall, P., additional, Kaiser, N., additional, Burgett, W., additional, Magnier, E., additional, Tonry, J., additional, Chambers, K., additional, Wainscoat, R., additional, Waters, C., additional, Price, P., additional, Metcalfe, N., additional, Valenti, S., additional, Kotak, R., additional, Mead, A., additional, Inserra, C., additional, Chen, T. W., additional, and Soderberg, A., additional

Published
2016
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9. Total eclipse of the heart: the AM CVn Gaia14aae/ASSASN-14cn

Author

Campbell, H. C., primary, Marsh, T. R., additional, Fraser, M., additional, Hodgkin, S. T., additional, de Miguel, E., additional, Gänsicke, B. T., additional, Steeghs, D., additional, Hourihane, A., additional, Breedt, E., additional, Littlefair, S. P., additional, Koposov, S. E., additional, Wyrzykowski, Ł., additional, Altavilla, G., additional, Blagorodnova, N., additional, Clementini, G., additional, Damljanovic, G., additional, Delgado, A., additional, Dennefeld, M., additional, Drake, A. J., additional, Fernández-Hernández, J., additional, Gilmore, G., additional, Gualandi, R., additional, Hamanowicz, A., additional, Handzlik, B., additional, Hardy, L. K., additional, Harrison, D. L., additional, Iłkiewicz, K., additional, Jonker, P. G., additional, Kochanek, C. S., additional, Kołaczkowski, Z., additional, Kostrzewa-Rutkowska, Z., additional, Kotak, R., additional, van Leeuwen, G., additional, Leto, G., additional, Ochner, P., additional, Pawlak, M., additional, Palaversa, L., additional, Rixon, G., additional, Rybicki, K., additional, Shappee, B. J., additional, Smartt, S. J., additional, Torres, M. A. P., additional, Tomasella, L., additional, Turatto, M., additional, Ulaczyk, K., additional, van Velzen, S., additional, Vince, O., additional, Walton, N. A., additional, Wielgórski, P., additional, Wevers, T., additional, Whitelock, P., additional, Yoldas, A., additional, De Angeli, F., additional, Burgess, P., additional, Busso, G., additional, Busuttil, R., additional, Butterley, T., additional, Chambers, K. C., additional, Copperwheat, C., additional, Danilet, A. B., additional, Dhillon, V. S., additional, Evans, D. W., additional, Eyer, L., additional, Froebrich, D., additional, Gomboc, A., additional, Holland, G., additional, Holoien, T. W.-S., additional, Jarvis, J. F., additional, Kaiser, N., additional, Kann, D. A., additional, Koester, D., additional, Kolb, U., additional, Komossa, S., additional, Magnier, E. A., additional, Mahabal, A., additional, Polshaw, J., additional, Prieto, J. L., additional, Prusti, T., additional, Riello, M., additional, Scholz, A., additional, Simonian, G., additional, Stanek, K. Z., additional, Szabados, L., additional, Waters, C., additional, and Wilson, R. W., additional

Published
2015
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10. Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey

Author

Liu, J., primary, Hennig, C., additional, Desai, S., additional, Hoyle, B., additional, Koppenhoefer, J., additional, Mohr, J. J., additional, Paech, K., additional, Burgett, W. S., additional, Chambers, K. C., additional, Cole, S., additional, Draper, P. W., additional, Kaiser, N., additional, Metcalfe, N., additional, Morgan, J. S., additional, Price, P. A., additional, Stubbs, C. W., additional, Tonry, J. L., additional, Wainscoat, R. J., additional, and Waters, C., additional

Published
2015
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11. Machine learning for transient discovery in Pan-STARRS1 difference imaging

Author

Wright, D. E., primary, Smartt, S. J., additional, Smith, K. W., additional, Miller, P., additional, Kotak, R., additional, Rest, A., additional, Burgett, W. S., additional, Chambers, K. C., additional, Flewelling, H., additional, Hodapp, K. W., additional, Huber, M., additional, Jedicke, R., additional, Kaiser, N., additional, Metcalfe, N., additional, Price, P. A., additional, Tonry, J. L., additional, Wainscoat, R. J., additional, and Waters, C., additional

Published
2015
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12. Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey

Author

McCrum, M., primary, Smartt, S. J., additional, Rest, A., additional, Smith, K., additional, Kotak, R., additional, Rodney, S. A., additional, Young, D. R., additional, Chornock, R., additional, Berger, E., additional, Foley, R. J., additional, Fraser, M., additional, Wright, D., additional, Scolnic, D., additional, Tonry, J. L., additional, Urata, Y., additional, Huang, K., additional, Pastorello, A., additional, Botticella, M. T., additional, Valenti, S., additional, Mattila, S., additional, Kankare, E., additional, Farrow, D. J., additional, Huber, M. E., additional, Stubbs, C. W., additional, Kirshner, R. P., additional, Bresolin, F., additional, Burgett, W. S., additional, Chambers, K. C., additional, Draper, P. W., additional, Flewelling, H., additional, Jedicke, R., additional, Kaiser, N., additional, Magnier, E. A., additional, Metcalfe, N., additional, Morgan, J. S., additional, Price, P. A., additional, Sweeney, W., additional, Wainscoat, R. J., additional, and Waters, C., additional

Published
2015
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13. Spectral analysis of four 'hypervariable' AGN: a microneedle in the haystack?

Author

Bruce, A., Lawrence, A., MacLeod, C., Elvis, M., Ward, M. J., Collinson, J. S., Gezari, S., Marshall, P. J., Lam, M. C., Kotak, R., Inserra, C., Polshaw, J., Kaiser, N., Kudritzki, R-P., Magnier, E. A., and Waters, C.

Subjects
ACTIVE galactic nuclei, MICROLENSES, STELLAR mass, OPTICAL spectroscopy, LIGHT curves
Abstract

We analyse four extreme active galactic nuclei (AGN) transients to explore the possibility that they are caused by rare, high-amplitude microlensing events. These previously unknown type-I AGN are located in the redshift range 0.6-1.1 and show changes of >1.5 mag in the g band on a time-scale of ∼years. Multi-epoch optical spectroscopy, from theWilliam Herschel Telescope, shows clear differential variability in the broad line fluxes with respect to the continuum changes and also evolution in the line profiles. In two cases, a simple point-source, point-lens microlensing model provides an excellent match to the long-term variability seen in these objects. For both models, the parameter constraints are consistent with the microlensing being due to an intervening stellar mass object but as yet there is no confirmation of the presence of an intervening galaxy. The models predict a peak amplification of 10.3/13.5 and an Einstein time-scale of 7.5/10.8 yr, respectively. In one case, the data also allow constraints on the size of the C III] emitting region, with some simplifying assumptions, to be ∼1.0-6.5 light-days and a lower limit on the size of the MgII emitting region to be >9 light-days (halflight radii). This C III] radius is perhaps surprisingly small. In the remaining two objects, there is spectroscopic evidence for an intervening absorber but the extra structure seen in the light curves requires a more complex lensing scenario to adequately explain. [ABSTRACT FROM AUTHOR]

Published
2017
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14. 2MASS 0213+3648 C: a wide T3 benchmark companion to an active, old M dwarf binary.

Author

Deacon, N. R., Magnier, E. A., Liu, Michael C., Schlieder, Joshua E., Aller, Kimberly M., Best, William M. J., Bowler, Brendan P., Burgett, W. S., Chambers, K. C., Draper, P. W., Flewelling, H., Hodapp, K. W., Kaiser, N., Metcalfe, N., Sweeney, W. E., Wainscoat, R. J., and Waters, C.

Subjects
BINARY stars, DWARF galaxies, STELLAR magnitudes, ABSORPTION, STELLAR mass
Abstract

We present the discovery of a 360 au separation T3 companion to the tight (3.1 au) M4.5+M6.5 binary 2MASS J02132062+3648506. This companion was identified using Pan-STARRS 1 data and despite its relative proximity to the Sun (22.2-4.0+6.4 pc; Pan-STARRS 1 parallax) and brightness (J = 15.3), it appears to have been missed by previous studies due to its position near a diffraction spike in 2MASS. The close M dwarf binary has active X-ray and Hα emission and shows evidence for UV flares. The binary's weak GALEX UV emission and strong Na i 8200 Å Na absorption lead us to an age range of ~1-10 Gyr. Applying this age range to evolutionary models implies that the wide companion has a mass of 0.063 ± 0.009 Mʘ. 2MASS J0213+3648 C provides a relatively old benchmark close to the L/T transition and acts as a key, older comparison to the much younger early-T companions HN Peg B and GU Psc b. [ABSTRACT FROM AUTHOR]

Published
2017
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15. Hiding in plain sight -- recovering clusters of galaxies with the strongest AGN in their cores.

Author

Green, T. S., Edge, A. C., Ebeling, H., Burgett, W. S., Draper, P. W., Kaiser, N., Kudritzki, R.-P., Magnier, E. A., Metcalfe, N., Wainscoat, R. J., and Waters, C.

Subjects
GALAXY clusters, ACTIVE galactic nuclei, X-ray emission spectroscopy, STELLAR luminosity function, X-rays
Abstract

A key challenge in understanding the feedback mechanism of active galactic nucleus (AGN) in Brightest Cluster Galaxies (BCGs) is the inherent rarity of catching an AGN during its strong outburst phase. This is exacerbated by the ambiguity of differentiating between AGN and clusters in X-ray observations. If there is evidence for an AGN then the X-ray emission is commonly assumed to be dominated by the AGN emission, introducing a selection effect against the detection of AGN in BCGs. In order to recover these 'missing' clusters, we systematically investigate the colour-magnitude relation around some ~3500 ROSAT All-Sky Survey selected AGN, looking for signs of a cluster red sequence. Amongst our 22 candidate systems, we independently rediscover several confirmed systems, where a strong AGN resides in a central galaxy. We compare the X-ray luminosity to red sequence richness distribution of our AGN candidate systems with that of a similarly selected comparison sample of ~1000 confirmed clusters and identify seven 'best' candidates (all of which are BL Lac objects), where the X-ray flux is likely to be a comparable mix between cluster and AGN emission. We confirm that the colours of the red sequence are consistent with the redshift of the AGN, that the colours of the AGN host galaxy are consistent with AGN, and, by comparing their luminosities with those from our comparison clusters, confirm that the AGN hosts are consistent with BCGs. [ABSTRACT FROM AUTHOR]

Published
2017
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16. Pan-STARRS1: Galaxy clustering in the Small Area Survey 2

Author

Farrow, Daniel J., primary, Cole, Shaun, additional, Metcalfe, N., additional, Draper, P. W., additional, Norberg, Peder, additional, Foucaud, Sébastien, additional, Burgett, W. S., additional, Chambers, K. C., additional, Kaiser, N., additional, Kudritzki, R. P., additional, Magnier, E. A., additional, Price, P. A., additional, Tonry, J. L., additional, and Waters, C., additional

Published
2013
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17. The superluminous supernova PS1-11ap: bridging the gap between low and high redshift

Author

McCrum, M., primary, Smartt, S. J., additional, Kotak, R., additional, Rest, A., additional, Jerkstrand, A., additional, Inserra, C., additional, Rodney, S. A., additional, Chen, T.-W., additional, Howell, D. A., additional, Huber, M. E., additional, Pastorello, A., additional, Tonry, J. L., additional, Bresolin, F., additional, Kudritzki, R.-P., additional, Chornock, R., additional, Berger, E., additional, Smith, K., additional, Botticella, M. T., additional, Foley, R. J., additional, Fraser, M., additional, Milisavljevic, D., additional, Nicholl, M., additional, Riess, A. G., additional, Stubbs, C. W., additional, Valenti, S., additional, Wood-Vasey, W. M., additional, Wright, D., additional, Young, D. R., additional, Drout, M., additional, Czekala, I., additional, Burgett, W. S., additional, Chambers, K. C., additional, Draper, P., additional, Flewelling, H., additional, Hodapp, K. W., additional, Kaiser, N., additional, Magnier, E. A., additional, Metcalfe, N., additional, Price, P. A., additional, Sweeney, W., additional, and Wainscoat, R. J., additional

Published
2013
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18. The Pan-STARRS1 Small Area Survey 2

Author

Metcalfe, N., primary, Farrow, D. J., additional, Cole, S., additional, Draper, P. W., additional, Norberg, P., additional, Burgett, W. S., additional, Chambers, K. C., additional, Denneau, L., additional, Flewelling, H., additional, Kaiser, N., additional, Kudritzki, R., additional, Magnier, E. A., additional, Morgan, J. S., additional, Price, P. A., additional, Sweeney, W., additional, Tonry, J. L., additional, Wainscoat, R. J., additional, and Waters, C., additional

Published
2013
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20. A Pan-STARRS 1 study of the relationship between wide binarity and planet occurrence in the Kepler field.

Author

Deacon, N. R., Kraus, A. L., Mann, A. W., Magnier, E. A., Chambers, K. C., Wainscoat, R. J., Tonry, J. L., Kaiser, N., Waters, C., Flewelling, H., Hodapp, K. W., and Burgett, W. S.

Subjects
EXTRASOLAR planets, STARS with planets, ASTRONOMICAL photometry, OPTICAL properties
Abstract

The NASA Kepler mission has revolutionized time-domain astronomy and has massively expanded the number of known extrasolar planets. However, the effect of wide multiplicity on exoplanet occurrence has not been tested with this data set. We present a sample of 401 wide multiple systems containing at least one Kepler target star. Our method uses Pan- STARRS 1 and archival data to produce an accurate proper motion catalogue of the Kepler field. Combined with Pan-STARRS 1 SED fits and archival proper motions for bright stars, we use a newly developed probabilistic algorithm to identify likely wide binary pairs which are not chance associations. As byproducts of this we present stellar SED templates in the Pan-STARRS 1 photometric system and conversions from this system to Kepler magnitudes. We find that Kepler target stars in our binary sample with separations above 6 arcsec are no more or less likely to be identified as confirmed or candidate planet hosts than a weighted comparison sample of Kepler targets of similar brightness and spectral type. Therefore we find no evidence that binaries with projected separations greater than 3000 au affect the occurrence rate of planets with P < 300 d around FGK stars. [ABSTRACT FROM AUTHOR]

Published
2016
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21. The QDOT all-sky IRAS galaxy redshift survey

Author

Lawrence, A., primary, Rowan-Robinson, M., additional, Ellis, R. S., additional, Frenk, C. S., additional, Efstathiou, G., additional, Kaiser, N., additional, Saunders, W., additional, Parry, I. R., additional, Xiaoyang, X., additional, and Crawford, J., additional

Published
1999
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22. The 2dF Galaxy Redshift Survey: spectral types and luminosity functions

Author

Folkes, S., primary, Ronen, S., additional, Price, I., additional, Lahav, O., additional, Colless, M., additional, Maddox, S., additional, Deeley, K., additional, Glazebrook, K., additional, Bland-Hawthorn, J., additional, Cannon, R., additional, Cole, S., additional, Collins, C., additional, Couch, W., additional, Driver, S. P., additional, Dalton, G., additional, Efstathiou, G., additional, Ellis, R. S., additional, Frenk, C. S., additional, Kaiser, N., additional, Lewis, I., additional, Lumsden, S., additional, Peacock, J., additional, Peterson, B. A., additional, Sutherland, W., additional, and Taylor, K., additional

Published
1999
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23. The topology of the QDOT IRAS redshift survey

Author

Moore, B., primary, Frenk, C. S., additional, Weinberg, D. H., additional, Saunders, W., additional, Lawrence, A., additional, Ellis, R. S., additional, Kaiser, N., additional, Efstathiou, G., additional, and Rowan-Robinson, M., additional

Published
1992
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29. Extreme Fe II emission from an IRAS quasar

Author

Lawrence, A., primary, Saunders, W., additional, Rowan-Robinson, M., additional, Crawford, J., additional, Ellis, R. S., additional, Frenk, C. S., additional, Efstathiou, G., additional, and Kaiser, N., additional

Published
1988
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