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The Herschel ATLAS

(2009)

Authors:

S Eales, L Dunne, D Clements, A Cooray, G De Zotti, S Dye, R Ivison, M Jarvis, G Lagache, S Maddox, M Negrello, S Serjeant, MA Thompson, E Van Kampen, A Amblard, P Andreani, M Baes, A Beelen, GJ Bendo, D Benford, F Bertoldi, J Bock, D Bonfield, A Boselli, C Bridge, V Buat, D Burgarella, R Carlberg, A Cava, P Chanial, S Charlot, N Christopher, P Coles, L Cortese, A Dariush, E Da Cunha, G Dalton, L Danese, H Dannerbauer, S Driver, J Dunlop, L Fan, D Farrah, D Frayer, C Frenk, J Geach, J Gardner, H Gomez, J Gonzalez-Nuevo, E Gonzalez-Solares, M Griffin, M Hardcastle, E Hatziminaoglou, D Herranz, D Hughes, E Ibar, Woong-Seob Jeong, C Lacey, A Lapi, M Lee, L Leeuw, J Liske, M Lopez-Caniego, T Muller, K Nandra, P Panuzzo, A Papageorgiou, G Patanchon, J Peacock, C Pearson, S Phillipps, M Pohlen, C Popescu, S Rawlings, E Rigby, M Rigopoulou, G Rodighiero, A Sansom, B Schulz, D Scott, DJB Smith, B Sibthorpe, I Smail, J Stevens, W Sutherland, T Takeuchi, J Tedds, P Temi, R Tuffs, M Trichas, M Vaccari, I Valtchanov, P Van der Werf, A Verma, J Vieria, C Vlahakis, Glenn J White
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Pixel multiplexing for high-speed multi-resolution fluorescence imaging

ArXiv 0910.0789 (2009)

Authors:

Gil Bub, Matthias Tecza, Michiel Helmes, Peter Lee, Peter Kohl

Abstract:

We introduce a imaging modality that works by transiently masking image-subregions during a single exposure of a CCD frame. By offsetting subregion exposure time, temporal information is embedded within each stored frame, allowing simultaneous acquisition of a full high spatial resolution image and a high-speed image sequence without increasing bandwidth. The technique is demonstrated by imaging calcium transients in heart cells at 250 Hz with a 10 Hz megapixel camera.
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Kinematic constraints on the stellar and dark matter content of spiral and S0 galaxies

(2009)

Authors:

Michael J Williams, Martin Bureau, Michele Cappellari
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Bright Lyman-alpha Emitters at z~9: constraints on the luminosity function from HiZELS

Monthly Notices of the Royal Astronomical Society: Letters Blackwell Publishing (2009)

Authors:

D Sobral, PN Best, JE Geach, I Smail, J Kurk, M Cirasuolo, M Casali, RJ Ivison, K Coppin, GB Dalton

Abstract:

New results are presented, as part of the Hi-z Emission Line Survey (HiZELS), from the largest area survey to date (1.4 sq.deg) for Lyman-alpha emitters (LAEs) at z~9. The survey, which is primarily targeting H-alpha emitters at z<3, uses the Wide Field CAMera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band and reaches a Lyman-alpha luminosity limit of ~10^43.8 erg/s over a co-moving volume of 1.12x10^6 Mpc^3 at z=8.96+-0.06. Only 2 candidates were found out of 1517 line emitters and those were rejected as LAEs after follow-up observations. The limit on the space density of bright LAEs is improved by 3 orders of magnitude, consistent with suppression of the bright end of the Lyman-alpha luminosity function beyond z~6. Combined with upper limits from smaller but deeper surveys, this rules out some of the most extreme models for high-redshift LAEs. The potential contamination of future narrow-band Lyman-alpha surveys at z>7 by Galactic brown dwarf stars is also examined, leading to the conclusion that such contamination may well be significant for searches at 7.7
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Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS

Monthly Notices of the Royal Astronomical Society: Letters 398:1 (2009)

Authors:

D Sobral, PN Best, JE Geach, I Smail, J Kurk, M Cirasuolo, M Casali, RJ Ivison, K Coppin, GB Dalton

Abstract:

New results are presented, as part of the Hi-z Emission Line Survey (HizELS), from the largest area survey to date (1.4 deg2) for Lyα emitters (LAEs) at z ~ 9. The survey, which is primarily targeting Hα emitters at z < 3, uses the Wide Field CAMera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band and reaches a Lyα luminosity limit of ~1043.8ergs-1 over a co-moving volume of 1.12 × 106 Mpc3 at z = 8.96 ± 0.06. Only two candidates were found out of 1517 line emitters and those were rejected as LAEs after follow-up observations. The limit on the space density of bright LAEs is improved by three orders of magnitude, consistent with suppression of the bright end of the Lyα luminosity function beyond z ~ 6. Combined with upper limits from smaller but deeper surveys, this rules out some of the most extreme models for high-redshift LAEs. The potential contamination of future narrow-band Lyα surveys at z > 7 by Galactic brown dwarf stars is also examined, leading to the conclusion that such contamination may well be significant for searches at 7.7 < z < 8.0, 9.1 < z < 9.5 and 11.7 < z < 12.2. © 2009 The Authors. Journal compilation © 2009 RAS.
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