Deep Lens Survey

The Deep Lens Survey (DLS, short for "Deep Gravitational Lensing Survey") is an ultra-deep multi-band optical survey of seven 4 square degree fields. Mosaic CCD imagers at the National Optical Astronomy Observatory's Blanco (Cerro Tololo) and Mayall telescopes (Kitt Peak) are being used. The deep fields took five years to complete (2001–2006), in four bands: B, V, R, and z', to 29/29/29/28 mag per square arcsecond surface brightness. Optical transient events (including moving objects such as minor planets and comets) and supernova candidates are released in real time.

Deep Lens Survey

Alternative names	"Deep Gravitational Lensing Survey"

Minor planets discovered: 79 

see § List of discovered minor planets

Survey

The main goal of the survey is to produce unbiased maps of the large-scale structure of the mass distribution beyond the local universe, via very deep multicolor imaging of seven 2-degree fields and colour-redshifts. The shear of distant galaxies induced by the mass of foreground structures will be measured. These weak-lensing observations are sensitive to all forms of clumped mass and will yield unbiased mass maps with resolution of one arcmin in the plane of the sky (about 120 kpc/h at z = 0.2), in multiple redshift ranges. These maps will measure for the first time the change in large scale structure from z = 1 to the present epoch, and test the current theories of structure formation, which predict that mass in the low-redshift universe has a particular filamentary/sheetlike structure. These observations will directly constrain the clustering properties of matter, and, when compared with the results from microwave background anisotropy missions, will test the basic theory of structure formation via gravitational instability.

While this is the main goal of the survey, a wide-field imaging survey has a myriad of other uses. In addition, the group is acquiring the data in a way which makes it possible to detect variable objects on scales of hours to months, by spreading observations of individual subfields over 4 runs over two years.

Discoveries

List of discovered minor planets

(46060) 2001 DL88	26 February 2001	list
(89886) 2002 CT230	14 February 2002	list
(104314) 2000 EC203	5 March 2000	list
(107558) 2001 DK85	23 February 2001	list
(107868) 2001 FT85	26 March 2001	list
(114722) 2003 GN33	3 April 2003	list
(143352) 2003 AB85	7 January 2003	list
(144688) 2004 FG145	29 March 2004	list
(147428) 2003 GM54	1 April 2003	list
(148990) 2001 YX92	17 December 2001	list
(154544) 2003 GP33	4 April 2003	list
(156423) 2002 AD92	12 January 2002	list
(159758) 2003 FZ122	31 March 2003	list
(160842) 2000 YE142	21 December 2000	list
(189839) 2003 AQ83	4 January 2003	list
(193671) 2001 DV84	23 February 2001	list
(196401) 2003 GM33	3 April 2003	list
(205413) 2001 FX85	26 March 2001	list
(208544) 2002 AE92	12 January 2002	list
(216501) 2000 EP203	5 March 2000	list
(220530) 2004 FT18	26 March 2004	list
(223271) 2003 GY32	1 April 2003	list
(223272) 2003 GC33	1 April 2003	list
(226345) 2003 FM122	31 March 2003	list
(231056) 2005 JG63	3 May 2005	list

(231914) 2000 YT140	19 December 2000	list
(242393) 2004 FO18	26 March 2004	list
(242599) 2005 JG45	2 May 2005	list
(244218) 2002 AA93	14 January 2002	list
(245421) 2005 JW63	4 May 2005	list
(245431) 2005 JX108	6 May 2005	list
(252143) 2000 YK141	20 December 2000	list
(257954) 2000 YY141	20 December 2000	list
(264468) 2001 FY85	26 March 2001	list
(267852) 2003 UJ283	30 October 2003	list
(270019) 2001 FA86	26 March 2001	list
(270473) 2002 DV4	17 February 2002	list
(275636) 2000 EJ203	5 March 2000	list
(283757) 2003 EU61	8 March 2003	list
(285797) 2000 WN193	24 November 2000	list
(285835) 2001 DW83	23 February 2001	list
(287594) 2003 FK122	31 March 2003	list
(297152) 2010 UQ56	14 February 2002	list
(301831) 2011 QH14	5 March 2000	list
(302421) 2002 CU230	14 February 2002	list
(302806) 2003 AH83	4 January 2003	list
(302864) 2003 GJ54	1 April 2003	list
(306179) 2010 WA55	2 April 2003	list
(306339) 2011 SQ129	5 January 2003	list
(306581) 2000 ED204	6 March 2000	list

(317662) 2003 FY122	31 March 2003	list
(318601) 2005 JX45	3 May 2005	list
(321876) 2010 SG7	23 February 2001	list
(337289) 2000 WL194	25 November 2000	list
(338450) 2003 EG55	9 March 2003	list
(348151) 2004 FS18	26 March 2004	list
(354650) 2005 JR45	3 May 2005	list
(357315) 2003 FL122	31 March 2003	list
(360809) 2005 JH63	3 May 2005	list
(365944) 2012 AZ16	9 March 2003	list
(368103) 2013 EN	3 May 2005	list
(370195) 2002 CU231	15 February 2002	list
(370686) 2004 FS123	26 March 2004	list
(385437) 2003 GH55	1 April 2003	list
(393559) 2003 GO33	3 April 2003	list
(397214) 2006 GU37	2 April 2006	list
(415789) 2000 WO193	24 November 2000	list
(416827) 2005 JU45	3 May 2005	list
(416834) 2005 JY108	6 May 2005	list
(416835) 2005 JA109	6 May 2005	list
(427831) 2005 JQ108	4 May 2005	list
(434011) 2000 YU140	19 December 2000	list
(455743) 2005 JV45	3 May 2005	list
(461503) 2003 FJ122	31 March 2003	list
(461672) 2005 JM22	6 May 2005	list

(464869) 2005 JL22	4 May 2005	list
(464881) 2005 JF177	5 May 2005	list
(468500) 2005 JR108	6 May 2005	list
(481053) 2005 JP45	3 May 2005	list

Galaxy clusters

Significant discoveries

Cluster	Date	Notes	Names	Refs
DLSCL J0916.2+2951	2012	This is a dissociative galaxy cluster merger with a large separation between the baryonic and dark matter components.	Musket Ball Cluster

External links

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