Title: The Initial Mass Function Based on the Full-sky 20-pc Census of ~3,600 Stars and Brown Dwarfs Authors: Kirkpatrick J.D., Marocco F., Gelino C.R., Raghu Y., Faherty J.K., Bardalez Gagliuffi D.C., Schurr S.D., Apps K., Schneider A.C., Meisner A.M., Kuchner M.J., Caselden D., Smart R.L., Casewell S.L., Raddi R., Kesseli A., Andersen N.S., Antonini E., Beaulieu P., Bickle T.P., Bilsing M., Chieng R., Colin G., Deen S., Dereveanco A., Doll K., Luca H.A.D., Frazer A., Gantier J.M., Gramaize L., Grant K., Hamlet L.K., Higashimura H., Hyogo M., Jalowiczor P.A., Jonkeren A., Kabatnik M., Kiwy F., Martin D.W., Michaels M.N., Pendrill W., Pessanha Machado C., Pumphrey B., Rothermich A., Russwurm R., Sainio A., Sanchez J., Sapelkin-Tambling F.T., Schumann J., Selg-Mann K., Singh H., Stenner A., Sun G., Tanner C., Thevenot M., Ventura M., Voloshin N.V., Walla J., Wedracki Z., Adorno J.I., Aganze C., Allers K.N., Brooks H., Burgasser A.J., Calamari E., Connor T., Costa E., Eisenhardt P.R., Gagne J., Gerasimov R., Gonzales E.C., Hsu C., Kiman R., Li G., Low R., Mamajek E., Pantoja B.M., Popinchalk M., Rees J.M., Stern D., Suarez G., Theissen C., Tsai C.-W., Vos J.M., Zurek D., The Backyard Worlds: Planet 9 Collaboration Table: Spectroscopic Follow-up ================================================================================ Byte-by-byte Description of file: apjsad24e2t20_mrt.txt -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 29 A29 --- Name Name 31- 40 A10 --- SName Approximate J2000 Coordinates used as a short name throughout text 42- 57 A16 --- Instr Instrument 59- 62 I4 yr Obs.Y Observation Date (UTC), year 64- 66 A3 --- Obs.M Observation Date (UTC), month 68- 69 I2 --- Obs.D Observation Date (UTC), day in month 71- 79 A9 --- ObsCode Observer Code (1) 81- 87 A7 --- SpT-Opt Optical Spectral Type 89- 89 A1 --- f_SpT-Opt Flag on SpT-Opt (2) 91-111 A21 --- SpT-NIR NIR Spectral Type (3) -------------------------------------------------------------------------------- Note (1): Observer codes as follows: A = Katelyn Allers; B = Adam Burgasser; C = Emily Calamari; D = Adam Schneider; E = Peter Eisenhardt; F = Jacqueline Faherty; G = Daniella Bardalez Gagliuffi; H = Eileen Gonzales; I = Christopher Theissen; J = Roman Gerasimov; K = Rocio Kiman; L = Guodong Li; M = Jonathan Gagne; N = Dan Caselden; O = Les Hamlet; P = Thomas Connor; Q = Blake Pantoja; R = Austin Rothermich; S = Daniel Stern; T = Chao-Wei Tsai; U = Eric Mamajek; V = Federico Marocco; W = Jon Rees X = Jose I. Adorno; Y = Johanna Vos; Z = Mark Popinchalk; 1 = Christian Aganze; 2 = Chih-Chun Hsu; 3 = Richard Smart; 4 = Ryan Low; 5 = Davy Kirkpatrick. Note (2): Flags on Optical Spectral types as follows: 1 = 0556+1546: Spectrum shows slightly stronger CaH bands relative to the M5 standard, though not enough to warrant a d/sdM5 designation; 2 = 0727-0718: See section 4.7 of Tremblay et al. (2020) [2020MNRAS.497..130T] for an assessment of the spectral type. The Gaia DR2 parallax, which has a large uncertainty relative to other objects of similar magnitude, must be erroneous. No parallax is given in Gaia DR3. This star must actually fall well outside 20 pc; 3 = 1423+5146: Spectrum shows slightly stronger CaH bands relative to the M7 standard, though not enough to warrant a d/sdM7 designation. Note (3): Near-infrared spectral types of "sl. blue", "blue", "sl. red", and "red" refer to objects that are slightly ("sl.") or considerably bluer or redder in the H- and K-bands than the established spectral standard at that subtype, after the standard spectrum and target spectrum are overplotted at J-band. Those listed as "pec" (peculiar) have spectral morphologies that fail to match the established standards and cannot be characterized as easily. See section 5.2 of Kirkpatrick et al. (2010) [2010ApJS..190..100K] for more discussion. -------------------------------------------------------------------------------- 2MASS J00251602+5422547 0025+5422 Palomar/DBSP 2022 Aug 27 S M7 CWISER J003350.99+434010.6 0033+4340 Palomar/DBSP 2022 Jan 02 E,L,S,T L2 2MASS J00492565+6518038 0049+6518 Palomar/DBSP 2022 Aug 27 S M5 WISE J005936.73+523719.0 0059+5237 Palomar/DBSP 2022 Aug 27 S M5 1RXS J010228.1+633256 0102+6332 Palomar/DBSP 2022 Jan 02 E,L,S,T M6 pec CWISE J013343.58+803153.1 0133+8031 APO/TSpec 2019 Oct 08 A,Q T4 CWISE J014407.64+380255.6 0144+3802 IRTF/SpeX 2022 Jan 09 C,F L5.5 blue WISEA J015815.65+180713.7 0158+1807 Palomar/DBSP 2022 Feb 03 S M6.5 2MASS J02124635+1032546 0212+1032 Palomar/DBSP 2022 Feb 03 S M6 LP 941-19 0213-3345 Palomar/DBSP 2021 Dec 06 S DA4.5 LP 469-205 0215+1015 Palomar/DBSP 2022 Feb 03 S M5 2MASS J02195603+5919273 0219+5919 Palomar/DBSP 2021 Dec 06 S M6 2MASS J02224767-2732349 0222-2732 Palomar/DBSP 2021 Dec 06 S M8 2MASS J03000272+6251582 0300+6251 Palomar/DBSP 2022 Feb 03 S M5 CWISE J034547.29+513716.0 0345+5137 IRTF/SpeX 2021 Nov 25 C,F,R L5.5 sl. red LP 357-56 0354+2416 Palomar/DBSP 2022 Feb 03 S M6 2MASS J04134574+3709087 0413+3709 Palomar/TSpec 2018 Oct 17 U,V,W L3 Gaia EDR3 180116295441149824 0430+4118 Palomar/DBSP 2021 Dec 06 S L0 LP 834-48 0431-2150 Palomar/DBSP 2022 Feb 07 S M5 2MASS J04490464+5138412 0449+5138 Palomar/DBSP 2022 Feb 03 S M6.5 UCAC4 767-032810 0449+6317 Palomar/DBSP 2022 Jan 02 E,L,S,T early-G CWISE J045334.34+203350.2 0453+2033 IRTF/SpeX 2018 Oct 01 K,Y,Z early- to mid-sdL 2MASS J05053461+4648017 0505+4647 Palomar/DBSP 2021 Dec 06 S M8 NLTT 14748 0516+5640 Palomar/DBSP 2022 Feb 03 S M6.5 CWISE J053046.20+440849.2 0530+4408 IRTF/SpeX 2020 Nov 25 C,F,R T5 LSPM J0540+6417 0540+6417 Palomar/DBSP 2021 Dec 06 S M8.5 CWISE J054034.89+414401.7 0540+4144 IRTF/SpeX 2022 Jan 09 C,F T3 Gaia DR2 265201384281320448 0551+5511 Palomar/DBSP 2022 Feb 03 S M6.5 WISEA J055600.48+154559.3 0556+1546 Palomar/DBSP 2022 Feb 03 S M5 pec 1 CWISE J055816.67-450233.4 0558-4502 Magellan/FIRE 2020 Feb 18 D T8.5 CWISE J055829.92-233053.4 0558-2330 IRTF/SpeX 2019 Mar 16 F L7 blue CWISE J055942.94-012002.4 0559-0120 IRTF/SpeX 2022 Jan 09 F L5.5 red TYC 3382-603-1 0606+4851 Palomar/DBSP 2022 Jan 02 E,L,S,T mid-F CWISE J060822.15-421244.7 0608-4212 Magellan/FIRE 2016 Jan 23 M L5.5 sl. blue CWISE J060938.91+062513.2 0609+0625 IRTF/SpeX 2020 Oct 30 C,F,R,X L7 BD+10 1032A 0610+1019A Palomar/DBSP 1995 Dec 02 5 M3 BD+10 1032B 0610+1019B Palomar/DBSP 1995 Dec 02 5 M4 CWISE J061741.79+194512.8 A 0617+1945A Palomar/DBSP 2021 Dec 06 S L2 Gaia EDR3 3330473222213987072 0623+1018 Palomar/DBSP 2021 Dec 06 S M3 CWISE J063513.64-143029.4 0635-1430 IRTF/SpeX 2022 Jan 09 F L9 sl. blue UPM J0641+1226 0641+1226 Palomar/DBSP 2022 Feb 03 S M5 WISEA J064313.95+163143.6 0643+1631 Palomar/DBSP 2021 Dec 06 S M7 CWISE J064341.04+195039.3 0643+1950 Magellan/FIRE 2019 Dec 11 G,K T2 sl. red Gaia EDR3 2936126887218756736 0705-1535 Palomar/DBSP 2021 Dec 06 S bkg CWISE J072418.16+430717.3 0724+4307 Keck/NIRES 2019 Feb 14 B,2 T6 UCAC4 414-032626 0727-0718 Palomar/DBSP 2021 Dec 06 S A 2 UPM J0730-2831 0730-2831 Palomar/DBSP 2022 Feb 03 S M5 2MASS J07312949+0249084 0731+0249 Palomar/DBSP 2022 Feb 03 S M6 CWISE J073748.86-252613.0 0737-2526 IRTF/SpeX 2019 Jan 23 F,H L3 sl. red CWISE J074346.98+314603.4 0743+3146 Keck/NIRES 2021 Feb 24 B,J,2 T8 CWISE J075227.38+053802.6 0752+0538 IRTF/SpeX 2022 Jan 09 F L9 pec (composite) CWISE J075628.41-063709.5 0756-0637 CTIO/ARCoIRIS 2018 Apr 03 F L6: blue CWISE J075744.48-300504.3 0757-3005 IRTF/SpeX 2022 Feb 12 F,N,O,R T4.5 CWISE J075853.12-232645.8 0758-2326 IRTF/SpeX 2022 Feb 21 F,O T2.5 pec (composite?) CWISE J080940.43-372003.7 0809-3720 IRTF/SpeX 2019 Mar 17 F L5 sl. blue CWISER J090720.27-430856.7 0907-4308 CTIO/ARCoIRIS 2018 Apr 02 F L5 LP 846-7 0929-2429 Palomar/DBSP 2022 Feb 03 S M6 CWISE J093035.01-743148.6 0930-7431 CTIO/ARCoIRIS 2018 Apr 03 F T7 LSPM J1024+3902W 1024+3902W Palomar/DBSP 2022 Feb 03 S M4.5 LSPM J1024+3902E 1024+3902E Palomar/DBSP 2022 Feb 03 S M4.5 LP 848-50 1042-2416 Palomar/DBSP 2021 Dec 06 S M6.5 NLTT 25223 1045+4941 Palomar/DBSP 2022 Feb 03 S M5 CWISE J113646.36+205733.9 1136+2057 IRTF/SpeX 2019 Jan 23 F,H M9: CWISE J120258.26+305233.3 1202+3052 IRTF/SpeX 2022 Mar 07 C,O T6 UCAC4 641-049451 1318+3810 Palomar/DBSP 2022 Jan 02 E,L,S,T early-G CWISE J132403.81-052631.4 1324-0526 IRTF/SpeX 2022 Jan 19 C,F sdT4 CWISE J135338.04+441017.6 1353+4410 IRTF/SpeX 2022 Mar 11 C,N,O T7.5 2MASS J14194617+3137094 1419+3137 Palomar/DBSP 2022 Feb 03 S M6.5 NLTT 37185 1423+5146 Lick/Kast 2022 Jul 02 B,1,2 M7 3 LP 440-17 1423+1426 IRTF/SpeX 2021 Jun 30 3 M7 CWISE J142830.96-064435.5 1428-0644 IRTF/SpeX 2019 Mar 16 F L5 sl. blue UCAC3 169-135909 1443-0539 Palomar/DBSP 2022 Feb 03 S M5.5 UCAC3 169-135909 1443-0539 Palomar/DBSP 2022 May 24 S M5.5 Gaia EDR3 6305165514134625024 1459-1832 Palomar/DBSP 2022 May 24 S bkg Gaia EDR3 6013647666939138688 1529-3552 Palomar/DBSP 2022 May 24 S bkg L 153-43 1557-6128 CTIO 1.5m/RCSpec 1996 May 20 5 M4 L 74-208 1613-7009 CTIO 4m/RCSpec 1997 Jul 16 5 M4.5 SCR J1630-3633 1630-3633 Palomar/TSpec 2018 Apr 28 U,V M5.5 2MASS J16523515-2900186 1652-2900 Palomar/DBSP 2022 Aug 27 S M5.5 SCR J1656-2046 1656-2046 Palomar/DBSP 2022 Aug 27 S M6 DENIS J171204.4-032328 1712-0323 Palomar/TSpec 2018 Apr 28 U,V M7.5 CWISER J171509.58-151534.6 1715-1515 IRTF/SpeX 2019 Mar 16 F M8 pec Gaia DR2 4053559111471124608 1736-3425 Palomar/DBSP 2022 Aug 27 S M6.5 2MASS J17392440-2327071 1739-2327 Palomar/DBSP 2022 Aug 27 S M5 NLTT 45285 1741+0940 Lick/Kast 2020 Mar 06 B,J,2 M7.5 SCR J1746-3214 1746-3214 Palomar/TSpec 2018 Apr 29 U,V M5.5 CWISE J181429.08-202534.4 1814-2025 IRTF/SpeX 2021 May 31 3 M8 WISEA J182423.61-053653.6 1824-0536 Palomar/TSpec 2018 Apr 28 U,V M6.5 WT 562 1826-6547 CTIO 4m/RCSpec 1995 Aug 14 5 M5 Gaia DR2 4159791176135290752 1831-0732 Palomar/DBSP 2022 May 30 P M9.5 UCAC4 378-124295 1834-1426 Palomar/DBSP 2022 May 30 P M5 Gaia EDR3 4479498508613790464 1839+0901 Palomar/DBSP 2022 Aug 27 S M2.5 CWISE J185608.94-082257.6 1856-0822 Lick/Kast 2019 Sep 20 J,1 L0 WISEP J190648.47+401106.8 1906+4011 Palomar/DBSP 2022 Aug 27 S L1 NLTT 47423 1907+0443 Palomar/DBSP 2022 May 30 P M6 CWISE J191118.88+085456.3 1911+0854 Palomar/DBSP 2022 Aug 27 S M4 2MASS J19212977-2915507 1921-2915 Lick/Kast 2020 Aug 16 B M7 CWISE J192351.88+234611.8 1923+2346 IRTF/SpeX 2021 Sep 11 C,F,R M9 CWISE J194929.61+171301.3 1949+1713 APO/TSpec 2018 Sep 23 A L2.5 Gaia DR2 2034222547248988032 1955+3215 Palomar/TSpec 2019 Sep 18 U,V L1 pec UCAC4 563-099325 1955+2224 Palomar/DBSP 2022 May 30 P mid-F? HD 191408 B 2011-3606 CTIO 4m/RCSpec 1995 Aug 13 5 M4 EC 20173-3036 2020-3027 Palomar/DBSP 2022 Jun 07 S DC LSPM J2044+1517 2044+1517 Palomar/DBSP 2022 Aug 27 S M7.5 G 25-4 2048+1127 Palomar/DBSP 2022 May 30 P M3.5 2MASS J20492745+3336512 2049+3336 Palomar/DBSP 2022 May 30 P M7 MFL2000 J210104.18+030705.1 2101+0307 Palomar/DBSP 2022 Aug 27 S M6.5 2MASS J21272531+5553150 2127+5553 Lick/Kast 2020 Aug 15 B,J,1 M7.5 UCAC4 230-189452 2136-4401 CTIO 4m/RCSpec 1997 Jul 14 5 M4.5 2MASS J21381698+5257188 2138+5257 Lick/Kast 2020 Dec 14 B,I,J,1,2 M6 CWISE J221113.55+054006.6 2211+0540 IRTF/SpeX 2021 Oct 23 C,F T6 CWISE J221859.41+114642.7 2218+1146 Keck/NIRES 2020 Jul 07 B,I,J T7 pec Gaia DR2 2206265777300448768 2225+6421 Palomar/TSpec 2019 Sep 18 U,V L1 pec CWISE J231403.13+693935.2 2314+6939 IRTF/SpeX 2018 Jun 16 F L7 blue CWISE J233135.66+644356.5 2331+6443 IRTF/SpeX 2018 Nov 25 F M8: CWISE J233819.49-385421.2 2338-3854 IRTF/SpeX 2021 Sep 11 C,F,R T0 WISEA J235713.21-630827.6 2357-6308 SALT/RSS 2021 Dec 26 F M5