DwarfArchives.org

December 6, 2012
- Updated style file, graphics, and acknowledgment, along with other wording, to reflect recent changes to Archives content.
- Added new links to press releases, artist renditions, and movies in the "For Educators" section.
November 6, 2012
- Added 7 Y dwarfs from Kirkpatrick et al (2012) [archive total 1280]
- Added WISE 1639-6847 (Y0:) from Tinney et al. (2012) [archive total 1281]
- Updated near-IR spectral type ( -> Y0.5) and reference ( -> Kirkpatrick et al. 2012) for WISE 1541-2250
October 24, 2012
- Added links on the front page to Y-only lists and also include Y dwarfs with the L+T lists.
October 22, 2012
- Added in 469 new L, T, and Y dwarfs! More additions are expected in the near future. [archive total 1273]
February 14, 2011
- Added Ross 458C, ULAS J141623.94+134836.3, and SDSS J141624.08+134826.7 (various sources) [archive total=804]
- changed discovery reference of 2MASS 2139+0220 from Cruz in prep to Reid et al. 2008
June 29, 2010
- Added 50 new T dwarfs from Burningham et al. (2010), Lucas et al. (2010), Artigau et al. (2010), and Delorme et al. (2010). [archive total=802]
- Merged the duplicate entries SDSS 1100+4957 and 2MASS 1100+4957 [archive total=801]
- changed the IR spectral type of 2MASS 2154+5942 from T6 to T5
June 2, 2010
- Corrected an error in the declination for SDSS 0900+2539
November 16, 2009
- merged the duplicate object entries for SDSS 143130.77+143653.4/2MASS J14313097+1436539 into 2MASS J14313097+1436539, the discovery name from the earlier reference (Sheppard & Cushing 2009) [archive total=752]
August 2, 2009
- Added 25 new L dwarfs from Zhang et al. (2009) [archive total=753]
- fixed another bug messing up the output of ASCII tables
July 27, 2009
- Added proper motions for 2MASS 0756+1244, 2MASS 1036-3441, and SDSS 2047-0718 (Goldman et al. 2008)
- fixed a scripting bug that prevented output of the query string and caused ASCII tables to be malformed
- upgraded the PHP and Apache software used to run this site
July 22, 2009
- changed the note for 2MASS 0141-4633 from "suspected young object (Reid et al. 2008)" to "suspected young object (Kirkpatrick et al. 2006)" to capture the first mention of this object's youth
May 22, 2009
- Added and/or updated the parallaxes and proper motions for 2MASS 0937+2931, SDSS 1256-0224, LSR 1610-0040, and 2MASS 1626+3925 (Schilbach, Roser, and Scholz 2009).
- Added 2MASS 0616-6407 (Cushing et al. 2009) [archive total=728]
April 24, 2009
- Added new subdwarf L SDSS 1256-0224 (Sivarani et al. 2009) [archive total=721]
- Added possible L8 companion to WD PHL 5038 (Steele et al. 2009) [archive total=722]
- Added 3 new L dwarfs (2MASS 1230+2827, 2MASS 1434+2202, 2MASS 1431+1436), 1 new T dwarf (2MASS 1059+3042), and 3 new proper motions (2MASS 1526+2043, SDSS 0858+3256, SDSS 1250+3925) from Sheppard & Cushing (2009) [archive total=726]
- Added added the T8.5 dwarf Wolf 940B (Burningham et al. 2009) [archive total=727]
April 13, 2009
- Fixed a typo in the optical spectral type of 2MASS J13061727+3820296 ("l0" -> "L0")
April 10, 2009
- Split the entry for Kelu-1AB because of the spectral types of the resolved components. Also added a note that Kelu-1A could be a binary, making the system a triple (Stumpf et al. 2008) [archive total=701]
- Revised the optical spectral types for 22 young L dwarfs and added a new one (2MASS J07123786-6155528). The new spectral typs use a Greek letter suffix (beta or gamma) to inidicate the strength of the low-gravity feature (gamma = very low gravity; beta = intermediate gravity). From Cruz, Kirkpatrick, and Burgasser (2009) [archive total=702]
- Added 13 faint, new L dwarfs (Scholz et al. 2009) [archive total=715]
- Added 2 new, late T dwarfs (UGCS 0300+4901 and UGCS 0530-0524) from Lodieu et al. 2008. [archive total=717]
- Added 3 new T dwarfs (ULAS 1017+0118, ULAS 1238+0953, and ULAS 1335+1130) from Burningham et al. (2008) [archive total=720]
March 26, 2009
- Fixed the IRSA Finder Chart access yet again. The default result page is now HTML and not XML.
January 7, 2009
- Added 2MASS J17114559+4028578 (G 203-50B) from Radigan et al. (2008) [archive total=700]
- Fixed an error in the DNS addresses that prevented access to IRSA's Coordinate Lookup and Finder Chart services.
January 6, 2009
- Added 31 new objects, updated optical spectral types for 36 objects, added youth notes for 8 objects, and removed 4 objects (2MASS 10220489+0200477, 2MASS 15474719-2423493, 2MASS 18544597+8429470, and 2MASS 23453903+0055137) all from Reid et al. (2008) [archive total=697].
- Added 2 Hyades T dwarfs from Bouvier, Kendall & Meeus (2008) [archive total=699].
December 5, 2008
- Fixed errors in the RA and Dec for ULAS J013117.53-003128.6 and ULAS J013939.77+004813.8
September 30, 2008
- fixed the script to grab the finder charts from IRSA, which went from an HTML-based result page to an XML-based result page
September 29, 2008
- added 1RXS J160929.1-210524B from Lafreniere, Jayawardhana, and vanKerkwijk (2008) [archive total=670]
September 26, 2008:
- added optical spectral types for 2MASS 0526-4455 and 2MASS 1209-1004; updated optical spectral types for SDSS 0837-0000, SDSS 1021-0304, 2MASS 2104-1037, and 2MASS 0518-2828; updated several "Kirkpatrick in prep" references to "Kirkpatrick et al. (2008)" for the preprint
August 8, 2008:
- added 2 peculiar objects from Looper et al. (2008) [archive total=669]
July 14, 2008:
- released new website design along with the M dwarf portion of the Archives
July 13, 2008:
- corrected the component separation for 2MASS 1404-3159AB in the notes. Also added the optical spectral type (T0), which was mysteriously missing (the reference was there!)
July 11, 2008:
- added 15 new T dwarfs from Pinfield et al. (2008) [archive total=667]
April 29, 2008:
- added a note for 2MASS 0320-0446 about it being a spectroscopic binary (Blake et al. 2008)
- added 3 objects from Delorme et al (2008): CFBDS1001+0226 (T5), CFBDS1934-2142 (T3.5), and CFBDS0959+0236 (T3) [archive total=652]
- updated astro-ph references to ADS abstracts for
  - Folkes et al. (2007)
  - Kendall et al. (2007)
  - Lodieu et al. (2007)
  - Looper et al. (2007)
  - Kasper et al. (2007)
  - Warren et al. (2007)
  - Gizis et al. (2007)
  - Burgasser et al. (2007->2008) x2
  - Phan-Bao et al. (2007->2008)
  - Zapatero Osorio et al. (2007->2008)
  - Jameson et al. (2007->2008)
  - Chiu et al. (2008)
  - Lodieu et al. (2008)
  - Metchev et al. (2008)
March 11, 2008:
- for 2MASS 0320-0446: added a proper motion (Burgasser et al. 2008), a note about possible binarity based on near-IR spectroscopy (Burgasser et al. 2008), and an optical spectral type (M8: Cruz et al. 2003).
- added a binarity note and optical spectral type for 2MASS 1404-3159 (Looper et al. 2008)
- updated the st_to_float function (converts a spectral type string to a floating point number for spectral type comparisons and ordering) to handle subdwarf types (sdM/L/T)
March 10, 2008:
- added CFBDS 0059-0114 (Delorme et al. 2008) [archive total=649]
March 3, 2008:
- fixed the declination for DENIS 1909-1937 (it was missing the decimal point!)
January 14, 2008:
- changed the name of DENIS-P 035729.6-441730 to DENIS-P J035726.9-441730 (the correct DENIS designation) in order to correct for a typo found in the literature.
- removed the entry for DENIS-P J1520022-442242. This object had been resolved as a binary with resolved spectra. The components of the binary are listed individually in the archive as 2MASS J15200224-4422419A&B, and so, this unresolved DENIS entry was not needed. [archive total=648]
January 7, 2008:
- added in the proper motion position angle error for 2MASS 1324+6358
- added three new objects (2MASS 0052+0012, 2MASS 0126+1428, and 2MASS 1546+4932) from Metchev et al. (2008). [archive total=649]
January 4, 2008:
- added 17 new L dwarfs from Lodieu et al. (2008) [archive total=646]
January 3, 2008:
- added 4 T dwarfs from Chiu et al. (2008) [archive total=629]
December 20, 2007:
- added the reference for the proper motion of IRAC 1429+3330
- added the proper motions for 140 objects from Jameson et al. (2007). Some of these new proper motions superceded those of Schmidt et al. (2007) because of the smaller errors in the Jameson sample.
- added the reference for the parallax of 2MASS 1207-3932B
- added a missing parallax for 2MASS 0532+8246. The error and proper motion were there!
December 18, 2007:
- removed DENIS 1126-5003 from the database since it is a duplicate of 2MASS 1126-5003. Added Burgasser et al. (2007) optical and near-IR spectral types to 2MASS 1126-5003. [archive total=625]
November 9, 2007:
- added parallax and revised the proper motion for DENIS 0255-4700 (Costa et al. 2006)
- added parallax and proper motion for DENIS 1441-0945 (Costa et al. 2006)
October 18, 2007:
- added proper motion to SOri 70 (Zapatero Osorio et al. 2007)
- revised optical spectral type and added Near-IR spectral type for DENIS 1126-5003 (Burgasser et al. 2007)
- added near-IR types for 2MASS 1300+1912, 2MASS 0921-2104, and 2MASS 1721+3344 (Burgasser et al. 2007)
September 24, 2007:
- added 18 new DENIS L dwarfs from Phan-Bao et al. (2007) [archive total=626]
September 21, 2007:
- added parallax and proper motion for 2MASS 1207-3909B (Gizis et al. 2007)
- added parallax and proper motion for 2MASS 0532+8246 (Burgasser et al. 2007)
- changed optical spectral types of 2MASS 0532+8246 and 2MASS 1626+3925 to sdL7 and sdL4, respectively (Burgasser, Cruz, & Kirkpatrick 2007)
August 23, 2007:
- fixed a bug in the code in which name searches and radial searches were not joined to the rest of the SQL "WHERE" clause with an "AND" if there were other parameters being searched (eg. spectral type).
August 8, 2007:
- Changed the references for ULAS 0034-0052 from Lodieu et al. (2007) to Warren et al. (2007).
July 31, 2007:
- fixed the 2MASS cross-ID for SDSS 1432-0059. This changed the designation, photometry, RA, and dec. The 2MASS match was found in the 2MASS Point Source Reject catalog (2MASSA designations).
July 5, 2007:
- added 11 T dwarfs from Looper, Kirkpatrick & Burgasser (2007)
- added a note to SDSS 0805+4812 saying that Burgasser (2007) infers it is a binary with L4.5+T5 components based on its near-IR spectrum.
- added SCR 1845-6357B from Kasper et al. (2007)
June 29, 2007:
- added 9 T dwarfs from Lodieu et al. (2007)
- updated discovery name, designation, proper motion position angle, ra, and dec for IRAC J142950.8+333011 (formally ISS J142950.9+333012). Also updated reference from preprint (Stern et al. 2006) to journal (Stern et al. 2007).
May 4, 2007:
- changed the optical spectral type reference for SDSS 0805+4812 from Kirkpatrick et al. (in prep) to Hawley et al. (2002)
April 22, 2007:
- updated Kendall et al. (2006) astro-ph reference to 2007 ADS reference.
- updated Mugrauer et al. (2006) astro-ph reference to ADS reference
- updated Luhman et al. (2006) astro-ph reference to 2007 ADS reference
- updated Cruz et al. (2007) astro-ph reference to 2007 ADS reference
- updated Folkes et al. (2006) Cool Stars abstract reference with 2007 astro-ph reference. Also updated the data on 2MASS 1126-5003 from those references.
- updated Schmidt et al. (2007) astro-ph reference with ADS reference
- added binary note for 2MASS 2132+1341 (Siegler et al. 2007)
- added a T4.5 and L0 from Kendall et al. (2007)
- changed optical spectral type of 2MASS 23515044-2537367 from L0.5 to M8 (Cruz et al. 2007). This object was subsequently dropped from the archive.
March 30, 2007:
- fixed typos in the proper motions for 2MASS 0241-0326, 2MASS 1956-1754, and 2MASS 2321-1326.
January 12, 2007:
- added 2MASSW 1421314+182740 from Gizis et al. (2000). There is an updated optical spectral type (L0 instead of M9.5) in Reid et al. (in prep) as reported in Schmidt et al. (2007)
January 11, 2007:
- fixed a bug where the first characters of RA and Dec in the "Coordinate" search field was being chopped off
January 5, 2007:
- added proper motions for 46 objects from Schmidt et al. (2007)
January 4, 2007:
- fixed typo in the proper motion error for 2MASS 2255-5713. (decimal point in wrong place!)
December 14, 2006:
- added 2MASS 1126-5003 from Folkes et al. (2006) (Cool Stars 14 Poster)
- added Cha 1305-7739 from Allers et al. (2006) and refs. therein
- added Lup 153927-344844 from Jayawardhana & Ivanov (2006) and refs. therein
- updated photometry, spectral types and astrometry for 2MASS 1520-4422A & B (Burgasser et al. 2006)
November 29, 2006:
- updated Apache to 2.2.3, PHP to 5.2.0, and PostgreSQL to 8.1.5 to address some security issues.
November 7, 2006:
- fixed a typo in the Chiu et al. (2006) reference URL
- added ADS abstract links for -
  - Artigau et al. (2006)
  - Gizis & Harvin (2006)
  - Henry et al. (2006)
  - Kirkpatrick et al. (2006)
  - McElwain & Burgasser (2006)
  - Metchev & Hillenbrand (2006)
October 20, 2006:
- added HN Peg B from Luhman et al. (2006)
October 19, 2006:
- added (DENIS 0255-4700) or updated (2MASS 1632+1904 and 2MASS 0310+1648) near-IR spectral types from Burgasser et al. (2006). Also updated the reference URL to point to the ADS journal abstract instead of preprint
October 4, 2006:
- added 15 new L dwarfs from Cruz et al. (2006). One of these (2MASS 0025+4759) was a binary from Reid et al. (2006).
- changed optical spectral type of SSSPM 2310-1759 from M9.5 to L0: (Cruz et al. 2006)
September 29, 2006:
- changed optical spectral type of 2MASS 2151-2441 to L3 (Cruz et al. 2006)
September 28, 2006:
- added a low gravity note for 2MASS 2213-2136 (Cruz et al. 2006)
- added a low gravity note and proper motion for 2MASS 0241-0326 (Cruz et al. 2006)
- added optical spectral type for 2MASS 0141+1804 (cruz et al. 2006)
- changed optical spectral type of 2MASS 0326-2102 to L4 (cruz et al. 2006)
- added optical spectral type for 2MASS 1515+4847 (Cruz et al. 2006)
- split the resolved binary 2MASS J15200224-4422419AB (Kendall et al. 2006) into 2MASS J15200224-4422419A & 2MASS J15200224-4422419B.
- changed the name of IBIS J013656.57+093347.3 to IAU official name: IPMS J013656.57+093347.3
September 27,2006:
- Unless otherwise noted, all of these changes/additions are from Cruz et al. (2006) -
  - changed optical spectral type of 2MASS 0311+3801 to L4:
  - changed optical spectral type of 2MASS 0230+2704 to L0:
  - changed optical spectral type of 2MASS 0310-2756 to L5
  - changed optical spectral type of 2MASS 0518-2756 to L0:
  - changed optical spectral type of 2MASS 0605-2342 to L0:
  - changed optical spectral type of 2MASS 1312+3937 to L0:
  - changed optical spectral type of 2MASS 1404+4634 to L0:
  - changed optical spectral type of 2MASS 1550+1455 to L2:
  - changed optical spectral type of 2MASS 1711+2326 to L0:
  - changed optical spectral type of 2MASS 2002-0521 to L6
  - changed optical spectral type of 2MASS 2026-2943 to L1:
  - changed optical spectral type of 2MASS 2041-3506 to L2:
  - added optical spectral type for 2MASS 2242+2542 (L3)
  - changed optical spectral type of 2MASS 2330-0347 to L1:
  - for 2MASS 0050-1538: changed optical spectral type to 'L1:' (Cruz et al. 2006), changed discovery name to SIPS J0050-1538 and added a proper motion (Deacon, Hambly, & Cooke 2005)
  - updated the Cruz et al. in prep. reference to Cruz et al. (2006) for 21 of the 22 objects with the in prep. reference. 2MASS 2139+0220 is still in prep. The optical spectral type reference for these 21 objects was changed from "unpublished" to Cruz et al. (2006).
September 21, 2006:
- Burleigh et al. 2006 (http://arxiv.org/abs/astro-ph/0609366) report that the white dwarf companion WD0137-349B has an L8 spectral type. This spectral type was based on fitting the unresolved spectrum of WD0137-349AB with a synthetic white dwarf + field L8 composite model. However, to separately list a companion in the Archives we require it to have resolved spectroscopy, which WD0137-349B does not. Thus, it is not included here.
- added IBIS J013656.57+093347.3 (Artigau et al. 2006)
- added HD 3651B (Mugrauer et al. 2006; Luhman et al. 2006; Burgasser 2006)
- changed DENIS 2200-3038 to DENIS 2200-3038B, changed photometry for the resolved component, and added proper motion for this now resolved M9+L0 system (Burgasser & McElwain 2006)
September 20, 2006:
- added 13 new L dwarfs from Kendall et al. (2006)
- added ISS J142950.9+333012 (Stern et al. 2006)
- added optical spectral type for 2MASS 1626+3925 (Gizis & Harvin 2006)
- updated parallax and proper motion for GJ 1001B (Henry et al. 2006). This now puts the object outside of 10 parsecs.
- added 2MASS J17072343-0558249B (McElwain & Burgasser 2006)
July 28, 2006:
- added HD 203030B (Metchev & Hillenbrand 2006)
July 24, 2006:
- fixed optical spectral type of 2MASS 0559-1404 (T4.5 -> T5)
- added Burgasser et al. (2003) optical spectral types for SDSS 0837-0000 (T0+/-2) and SDSS 1021-0304 (T4+/-2)
- added Burgasser et al. (2006) near-IR spectral type for 2MASS 0920+3517 (T0p)
- added 2MASS J21392676+0220226 (Cruz et al. in prep.)
- fixed near-IR spectral types for SDSS 0151+1244 (T1), 2MASS 0516-0445 (T5.5), NTTDF 1205-0744 (T6:), 2MASS 1828-4849 (T5.5), and 2MASS 2356-1553 (T5.5)
July 10, 2006:
- added binarity note for 2MASS 0915+0422 (Reid et al. 2006)
- added 2MASS 2142-3101 and 2MASS 2151-2441 from (Liebert & Gizis 2006)
- added '2MASS J' to the front of the 2MASS designation of SDSS 1250+3925
- results now return "null" for photometry that is not present in the database
July 5, 2006:
- fixed a bug in the search code whereby searches with any parameter combined with the "Optical or IR" option for spectral types returned erroneous results. The fix is parentheses "()" around the entire spectral type search string so that it is compared as a whole with the rest of the constraints.
June 21, 2006:
- added binarity note for 2MASS 1017+1308 (Bouy et al. 2003)
- added binarity note for SDSS 1021-0304 (Burgasser et al. 2006)
- added binarity note for 2MASS 0518-2828 (Burgasser et al. 2006)
- added binarity note for 2MASS 1553+1532 (Burgasser et al. 2006)
- added binarity note for 2MASS 2152+0937 (Reid et al. 2006)
June 19, 2006:
- added binarity note for 2MASS 0700+3157 (Reid et al. 2006)
- added binarity note for SDSS 0423-0414 (Burgasser et al. 2006)
- added binarity note for 2MASS 1430+2915 (Bouy et al. 2003)
June 16, 2006:
- added binarity note for SDSS 0926+5847 (Burgasser et al. 2006)
- added binarity note for DENIS 2252-1730 (Reid et al. 2006)
- dded binarity note for GJ 417B (Bouy et al. 2003)
June 14, 2006:
- added 2MASSA positions and photometry for -
  - SDSS J143553.25+112948.6
  - SDSS J143945.86+304220.6
  - SDSS J150411.63+102718.4
  - SDSS J162838.77+230821.1
  - SDSS J164916.89+464340.0
- fixed a typo in the coordinate of SDSS J163239.34+415004.3. The 10 arcsec typo also meant that the 2MASS designation and photometry were changed.
June 9, 2006:
- fixed spectral type of SDSS 1534+1615AB. (L3.5->T3.5)
May 2006:
- added 68 new objects from Chiu et al. 2006
- changed Burgasser et al. spectral type reference to 2006
February 2006:
- physically moved server to new location.
December 2005:
- fixed the references for a few objects that were overwritten when the November update was made to the references for 2MASS J0141-4633.
November 2005:
- updated T dwarf spectral types to those of the unified scheme (Burgasser et al. 2005; astro-ph)
- split eps Ind BaBb
- added 7 new objects in Lodieu et al. 2005 for which the computed (i.e. not adopted) spectral types are >=L0.
- updated near-IR and optical spectral types from Lodieu et al. 2005
- added PM for SSSPM J0829-1309
- updated references for 2MASS J0141-4633 to Kirkpatrick et al. 2006.

History of Updates and Corrections to the Archives