[98 Sep]
Cycle 8, STIS.
Gravitational Lens Candidates from the HST Medium Deep Survey.
Griffiths R, Ratnatunga K, Lehár J.
Req: 12 orbits.
[98 Sep]
Cycle 8, Archival.
The Core and Halo Environments of Distant Clusters.
Pahre M, Lehár J, van Dokkum P,
Falco E, Djorgovski G, de Carvalho R, Kochanek C.
[98 Sep]
Cycle 8, Archival.
The Surface Density and Morphologies of Extremely Red Objects.
Pahre M, Falco E, Lehár J,
Djorgovski G, Neugebauer G, Adelberger K,
Hogg D, Kochanek C.
[01 Sep]
NOAO (4 m, Kitt Pk, 4 m Cerro Tololo).
Discovering Poor Groups with Strong Lensing.
Keeton C, Zabludoff A, Falco E, Lehár J.
Req: 4 nt KP&images, 4 nt CT&images.
Award: 4 nt KP, 4 nt CT.
[00 Dec]
Gemini N (8.1 m, Mauna Kea).
The redshift of the Lensed ERO MG1131+0456.
Kochanek C, Falco E, McLeod B, Lehár J.
Req: 0.5 nt spectra (service).
Award: 0.5 nt.
[00 Jul]
MMT (6.5 m, Mt Hopkins).
Gravitational Lens Galaxy Redshifts.
Falco E, Kochanek C, McLeod B, Lehár J, Impey C, Peng C.
Req: 2×3 nt spectra.
Award: 2×2 nt.
[00 Mar]
MMT (6.5 m, Mt Hopkins).
Imaging of Quasar Host Galaxies in Gravitational Lens Systems.
McLeod B, Falco E, Kochanek C, Lehár J, Impey C, Peng C.
Req: 5 nt IR imaging.
Award: 4 nt.
[00 Mar]
Gemini N (8.1 m, Mauna Kea).
Closing the Loop: The Q0957+561 Host Galaxy Einstein Ring.
Kochanek C, Falco E, McLeod B, Lehár J,
Impey C, Keeton C, Peng C.
Req: 1.2 nt imaging.
[00 Mar]
Gemini N (8.1 m, Mauna Kea).
Astrometry of the PKS1830-211 Gravitational Lens.
Kochanek C, Falco E, McLeod B, Lehár J,
Impey C, Keeton C, Peng C.
Req: 0.2 nt imaging.
[99 Nov]
MMT (6.5 m, Mt Hopkins).
Imaging of Quasar Host Galaxies in Gravitational Lens Systems.
Peng C, Impey C, Falco E, Kochanek C, Lehár J, McLeod B, Rix H-W, Keeton C, Muñoz J.
Req: 6 nt imaging, 2 nt IR imaging.
Award: 2 nt.
[99 Nov]
MMT (6.5 m, Mt Hopkins).
Gravitational Lens Galaxy Redshifts.
Impey C, Kochanek C, Falco E, McLeod B, Lehár J, Rieke M, Peng C.
Req: 6 nt imaging, 3.5 nt Opt+IR spectra.
Award: 3.5 nt.
{99 Oct}Palomar Obs (1.7&5.6 m, Mt Palomar).
Search for Gravitationally Lensed Radio Lobes.
Buchalter A, Djorgovski G, Mahabal A, Lehár J.
Req: 6 nt imaging (1.7 m), 1 nt spectra (5.6 m).
Award: 6+1 nt.
[98 Apr]
WIYN (3.5 m, Kitt Peak).
Understanding the Dark Matter Distribution
in Quadruply Imaged Lensed Systems.
Squires G, Falco E, Hook I, Lehár J,
McLeod B, Kochanek C.
Req: 3 nt imaging.
Award: 3 nt.
[97 Apr]
WIYN (3.5 m, Kitt Peak).
Understanding the Dark Matter Distribution
in Quadruply Imaged Lensed Systems.
Squires G, Falco E, Hook I, Lehár J,
McLeod B, Kochanek C.
Req: 3 nt imaging.
Award: 3 nt.
Bad Weather.
[95 Apr]
MMT (6×1 m, Mt Hopkins).
Adaptive Optics Observations of Gravitational Lenses.
McLeod B, Falco E, Lehár J.
Req: 3 nt imaging.
Award: 3 nt. Clouds.
[94 Sep]
MMT (6×1 m, Mt Hopkins).
Velocity Dispersions of Lens Galaxies,
Object Identification for Lens Surveys.
Kochanek C, Falco E, Lehár J.
Req: 3 nt spectra.
Award: 3 nt.
[93 Dec]
WHT (4 m, La Palma).
SW/Y/33: Velocity Dispersion for
the Gravitational Lens in MG0751+2716.Lehár J, McMahon R.
Req: 2 hr spectra
(service).
[93 Dec]
WHT (4 m, La Palma).
SW/Y/29: Redshift for the Four-Image
Gravitational Lens in MG0414+0534.Lehár J, Ellis R, Hewitt J.
Req: 3 hr spectra
(service).
Award: 3 hr (94 Jan 05).
Clouds.
[93 Dec]
WHT (4 m, La Palma).
SW/Y/28: Redshift for the First
Gravitationally-Lensed Ring MG1131+0456.Lehár J, Ellis R, Hewitt J.
Req: 3 hr spectra
(service).
[93 Sep]
WHT (4 m, La Palma).
W/94A/78: Emission Line Gas in Narrow Angle Tail Radio Galaxies.Lehár J, Röttgering H, Bremer M.
Req: 2 nt imaging.
[93 Sep]
WHT (4 m, La Palma).
W/94A: Search for High Redshift Infrared Galaxies
and Protogalaxies.
Rowan-Robinson M, Oliver S, McMahon R,
Lehár J, Lawrence A.
Req: 3 nt spectra.
Award: 3 nt.
{92 Dec}WHT (4 m, La Palma).
SW/W/15: Redshift for the New Gravitational Lens MG0751+2716.Lehár J.
Req: 1 hr spectra
(service).
Award: 1 hr (93 Apr 09).
[Lehár et al. 97, AJ,114,48].
[92 Dec]
WHT (4 m, La Palma).
SW/V/9: Redshift for the Gravitationally Lensed System MG1549+3047.Lehár J.
Req: 2 hr spectra
(service).
Award: 2 hr (92 Jun 04).
Pointing error.
[92 Sep]
WHT (4 m, La Palma).
W/X/86: Galaxy Dynamics from Gravitational Lensing.
Walsh D, Lehár J, Webster RL, Kochanek CS, Falco EE.
Req: 2 nt spectra.
[92 Mar]
WHT (4 m, La Palma).
W/: The Evolution of the Universe between z=2 and z=4.5.
McMahon R, Hook I, Lehár J, Patnaik A, Browne I,
Burke B, Conner S, Irwin M.
Req: 3 nt spectra.
Award: 3 nt.
[92 Jan]
WHT (4 m, La Palma).
SW/V/10: Velocity Dispersion for the
Gravitational Lens in MG1549+3047.Lehár J
Req: 3 hr spectra
(service).
Award: 3 hr spectra
Withdrawn, observed elsewhere.
[Lehár et al. 95, AJ,111,1812].
[91 Sep]
WHT (4 m, La Palma).
W/V/8: Redshifts and Velocity Dispersion for the
Gravitationally Lensed "Einstein Ring" MG1549+3047.Lehár J, Lawrence C, Langston G, Conner SR, Burke BF.
Req: 1 nt spectra.
{89 Oct}MDM (1.3 m, Kitt Peak).
Optical Counterparts for the 3.6 cm VLA Lens Search.Lehár J.
Req: 10 nt imaging.
Award: 5 nt and 3 nt on 2.4 m (90 Mar 19-28).
[Lehár 91, MIT PhD Thesis].
[89 Mar]
MDM (2.4 m, Kitt Peak).
Optical Identification of MG Survey Sources.
Conner S, Heflin M, Griffith M, Lehár J, Burke B.
Req: 10 nt imaging.
Award: 6 nt on 2.4 m (89 Dec 29-90 Jan 03).
[88 Nov]
MDM (2.4 m, Kitt Peak).
Optical Properties of the
MIT-Greenbank 5 GHz Radio Survey.
Conner S, Heflin M, Lehár J, Burke B.
Req: 6 nt spectra.
Award: 6 nt.
[88 Oct]
MDM (2.4 m, Kitt Peak).
Optical Properties of the
MIT-Greenbank 5 GHz Radio Survey (Part II).Lehár J, Conner S, Heflin M, Burke B.
Req: 6 nt imaging.
Award: 6 nt.
[87 Nov]
MDM (2.4 m, Kitt Peak).
Optical Properties of the
MIT-Greenbank 5 GHz Radio Survey.
Conner S, Heflin M, Lehár J, Burke B.
Req: 4 nt imaging.
Award: 4 nt.
{03 Feb}
A-array+PT.
AH826: Imaging of Gravitationally Lensed Radio Lobes.
Haarsma D, Falco E, Kochanek C,
Lehár J, McMahon R, Muxlow T, Winn J.
Req: 35 hr at 6&20 cm.
{01 Sep}
A-array.
AH761: Search for Gravitationally Lensed Radio Lobes.
Haarsma D, Buchalter A, Falco E, Kochanek C,
Lehár J, McMahon R, Winn J.
Req: 30 hr at 6 cm.
Award: 30 hr (02 Mar 8-17).
{00 Jun}
A-array+PT.
AL531: Gravitationally Lensed Radio Lobes.Lehár J, Buchalter A, McMahon R, Kochanek C.
Req: 15 hr at 6&20 cm.
Award: 15 hr (00 Dec 23).
[00 Jun]
A-array.
AL530: Search for Gravitationally Lensed Radio Lobes.Lehár J, Buchalter A, McMahon R, Kochanek C.
Req: 26 hr at 6 cm.
[97 Oct]
C-array.
AL467: A Redshift Survey of Faint, Flat-Spectrum Radio Sources.Lehár J, Falco E, Kochanek C, Muñoz J,
Mediavilla E, Oscoz A, Serra M.
Req: 2×12 hr at 6 cm.
Award: 2×12 hr (98 Dec 8,9).
{97 Oct}
A-array.
AL434: Candidate Gravitationally-Lensed Radio Lobes.Lehár J, Buchalter A, McMahon R, Kochanek C.
Req: 8 hr at 6 cm.
Award: 8 hr (98 May 26).
[Lehár et al. 01, ApJ,547,60-76].
[97 Oct]
C-array.
AL433: A Redshift Survey of Faint, Flat-Spectrum Radio Sources.Lehár J, Falco E, Kochanek C, Muñoz J,
Mediavilla E, Oscoz A, Serra M.
Req: 2×12 hr at 6 cm.
{97 Feb}
C-array.
AL418: Variability of Radio-Quiet Quasars.Lehár J, Falcke H, Barvainis R, Menten K,
Birkinshaw M, Elvis M, Blundell K.
Req: 5×4 hr at 3.6 cm.
Award: 5×4 hr.
[97 Feb]
C-array.
AF327: The Radio-Spectra of Radio-Quiet Quasars.
Falcke H, Barvainis R, Lehár J, Menten K,
Birkinshaw M, Elvis M, Blundell K.
Req: 32 hr at 3.6&20 cm.
Award: 3 hr.
{96 Sep}
B-array.
AL410: Variability of Radio-Quiet Quasars.Lehár J, Falcke H, Barvainis R, Menten K,
Birkinshaw M, Elvis M, Blundell K.
Req: 5×11 hr at 3.6 cm.
Award ~4 hr/month.
{96 Sep}
All arrays.
AH604: Monitoring of Gravitational Lens 0957+561.
Haarsma DB,
Hewitt JN, Lehár J, Burke BF, Roberts DH.
Req: 1 hr/month at 6&3.6 cm.
Award 1 hr/month (97 Jan-98 Feb).
[Haarsma et al. 98, ApJ,509,64].
{96 Apr}
A-array.
AL394: The Four-Image Gravitationally-Lensed Quasar Q2237+0305.Lehár J, Falco E, Wambsganss J, Witt H, Perley R.
Req: 8×8 hr at 6 cm.
{95 Feb}
A-array.
AL357: The Gravitationally Lensed Radio Source MG0751+2716.Lehár J, Kochanek C.
Req: 12 hr at 2 cm.
Award: 12 hr (95 Aug 18).
[95 Jan]
A-array.
AF293: The Gravitationally-Lensed QSO 2237+0305.
Falco E, Lehár J, Wambsganss J, Perley R.
Req: 12 hr at 3.6 cm.
Award: 12 hr (95 Jun 25).
[Falco et al. 96, AJ,112,897].
[94 Jan]
B-array.
AM454: Search for High Redshift Infrared Luminous Galaxies.
McMahon RG, Lonsdale CJ, Rowan-Robinson M,
Beeharry G, Lehár J.
Req: 19 hr at 20 cm.
Award: 12 hr (94 May 21).
{93 Oct}
All arrays.
AB705: The Time Delay of the Gravitational Lens 0957+561.
Burke BF, Becker DJ, Lehár J, Hewitt JN, Roberts DH.
Req: 1 hr/month at 6&3.6 cm.
Award: 1-2 hr/month.
[Haarsma et al. 97, ApJ,479,102].
{91 Feb}
A-array.
AB611: Continuation of the MG-VLA Gravitational Lens Search.
Burke BF, Turner E, Fletcher A,
Lehár J, Herold L, Conner SR.
Req: 100 hr at 3.6 cm.
Award: 36 hr (91 Aug 02).
[Herold-Jacobson 96, MIT PhD Thesis].
{89 Dec}
A-array.
AB568: Continuation of the MG-VLA Gravitational Lens Search.
Burke BF, Turner E, Fletcher A,
Lehár J, Herold L, Conner SR.
Req: 100 hr at 3.6 cm.
Award: 48 hr (90 May 01,03,05).
[Herold-Jacobson 96, MIT PhD Thesis].
{88 Oct}
A-array.
Gravitational Lens Survey.
Burke B, Hewitt J, Turner E, Conner S,
Heflin M, Lehár J.
Req: 10times;24 hr at 3.6 cm.
[88 Oct]
B-array.
AL188: Variation of Gravitational Lens 2016+112.
Langston G, Heflin M, Lehár J, Burke BF, Lawrence C.
Req: 4×2.5 hr at 6&3.6 cm.
Award: 2×2 hr.
Negative.
{88 Jun}
A-array.
AL187: Faint Source Lens Search.
Langston G, Burke B, Heflin M, Hewitt J,
Lehár J, Conner S.
Req: 2×12 hr at 3.6 cm.
Award: 2×12 hr (89 Jan 16,23).
[Lehár 91, MIT PhD Thesis].
[88 Jun]
A-array.
AC235: A Search for Gravitationally Lensed QSOs
with Small Image Separations.
Conner S, Lehár J, Burke BF.
Req: 24 hr at 3.6&2 cm.
Award: 12 hr (89 Jan 06).
Poor weather.
[88 Jun]
A-array.
AH328: Third Image near 2016+112C.
Heflin M, Lehár J, Burke BF, Langston G.
Req: 4 hr at 1.3 cm.
Award: 4 hr (88 Nov 13).
[Langston et al. 91, AJ,102,1253].
{87 Mar}
A,B,C-arrays.
AB456: The Time Delay of the Gravitational Lens 0957+561.
Burke BF, Hewitt JN, Roberts DH, Lehár J.
Req: 2 hr/month at 6 cm.
Award: 2 hr/month.
[Lehár et al. 91, ApJ,384,453].
[87 Mar]
A-array.
AL151: High Redshift Observation of 21 cm Absorption in MG2016+112.
Langston G, Heflin M, Lehár J, Burke BF.
Req: 6 hr spectral line at 90 cm.
Award: 6 hr.
Negative.
[87 Mar]
A-array.
Gravitational Lensing of Extended Radio Sources.
Conner S, Burke B, Heflin M, Lehár J.
Req: 24 hr at 2 cm.
{85 Oct}
D-array.
AR149: Rapid Radio Variability of OJ287
at Centimeter Wavelengths.
Dreher JW, De Bruyn AG, Roberts DH, Lehár J.
Req: 2×10 hr at 6&20 cm.
Award: 2×10 hr (86 Oct 16,18).
[Dreher et al. 87, BAAS,18,1046].
{97 Sep}MERLIN.
MN/98A/L33: Candidate Gravitationally Lensed Radio Lobes.Lehár J, McMahon RG, Röttgering HJA,
Buchalter A, Blanton E.
Req: 42 hr at 18 cm,
Award: 48 hr + Lovell (98 Apr 19-22).
[Lehár et al. 01, ApJ,547,60-76].
[96 Oct]
VLBA.
BH032: Model Constraints for Gravitational Lens 0957+561.
Haarsma DB, Lehár J, Shapiro II.
Req: 2×18 hr at 13&18 cm.
Award: 2×14 hr (97 Feb).
[Haarsma et al. 99, in Gravitational Lenses, ASP conf].
[96 Jan]
VLBA.
BJ023: Evaluation of the Astrometric Capabilities of the VLBA.
Johnston K, Fey A, Gaume R, Eubanks M, McCarthy D, Ma C,
Fomalont E, Clegg A, Lehár J.
Astrometry for radio reference frame.
Req: 16×24 hr.
[95 Feb]
MERLIN.
MN/95B/L38: Candidates for Gravitationally Lensed Radio Lobes.Lehár J, Röttgering HJA, McMahon RG.
Req: 24 hr at 18 cm.
Award: 48 hr (95 Nov 09,11-12).
Negative.
[91 Jan]
EVN+MERLIN.
MN/Y/L37: Combined EVN and MERLIN observations
of Candidate Gravitationally Lensed Systems.
Polatidis AG, Wilkinson PN, Lehár J,
Xu W, Readhead ACS, Pearson TJ.
Req: 28 hr at 18 cm.
Award: 24 hr.
Negative.
[90 Nov]
MERLIN.
MN/V: Observations of Small Separation
Candidates for Gravitational Lensing.Lehár J, Conner SR, Langston GI, Patnaik AR.
Req: 6×12 hr at 6 cm.
Award: 8 hr.
Negative.
{90 Apr}MERLIN.
MN/S/L24: MERLIN Observations of 7
Gravitational Lens Candidates.
Garrett MA, Patnaik A, Walsh D, Wilkinson PN,
Muxlow TWB, Lehár J.
Req: 7×12 hr at 18 cm.
Award: 7×12 hr.
[Patnaik 93, Liège Ast Coll 31,311].