\documentstyle[twoside]{article}

\input{ibvs2.sty}

\begin{document}

\IBVShead{4678}{4 March 1999}

\IBVStitletl{Identifications for the Haro-Chavira ``infrared stars''}

\IBVSauth{Brian A. Skiff}

\IBVSinsto{Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ\quad 86001-4499, USA, e-mail:  bas@lowell.edu}

\begintext

     The first seven extremely-red Haro-Chavira stars were published by Johnson
{\it et al}.\ (1965), which includes BVRIJHKLMN photometry for them.  The
positions listed for these stars are consistently nearly a full degree in
error, as a consequence of which they seem to have been overlooked in later
literature.  The offsets are parallel to the direction of precession, and the
error evidently arises from the application of 100 years of precession motion
with the wrong sign.  These stars were unambiguously identified using the
published charts, which are copied from the POSS-I prints of the region.

     In a follow-up work, Chavira (1967) published a more extensive list of
stars based on far-red objective-prism and direct plates.  The main difficulty
in the identifications was the poor positions, some in error by 10\arcm.  The
finder charts were thus indispensable for positive identification on the sky.
Two stars (HC 56 and HC 62) defeated my attempts to locate them.

     The table shows the HC numbers from the combined list followed by equinox
2000 coordinates.  Note that HC 5 was omitted in Johnson {\it et al}.\ (1965).
An asterisk by the star name indicates a note at the bottom of the table.
Column `s' shows the source of the position, coded as follows:  A = USNO--2.0,
F = FASTT (Henden \& Stone 1998), I = IRAS, S = SkyView.  After the IRAS names
come USNO--A2.0 blue magnitudes and `b--r' colors (neither are on a standard
system), and Johnson I magnitudes (from photoelectric measurements for HC 1-8,
and Chavira's eye-estimates from plates for the remainder).  The spectral types
are mostly from Chavira, but others from the literature are given as available
and specified in the Notes.  Some new identifications based on the corrected
positions are given in the Remarks.  A few stars are known or suspected
variables, but all certainly are to some degree.

\medskip

     This work was greatly facilitated by the use of SIMBAD, the VizieR
catalogue-server from the CDS-Strasbourg, and ({\it sine qua non}) the Goddard
SkyView utility.  My thanks to their creators and maintainers for providing
them to the astronomical community.
\vfil
\eject

\normalsize

\begin{center}
Table 1:  Positions and identifications
\vskip 2mm
\begin{tabular}{lcccccclll}
\hline
Name & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& s & IRAS & mb & b$-$r &\,~I & spec & Remarks \\
\hline
HC 1*  & 20 34 01.5 & +42 25 27 & A & 20322+4215 & 19.9 & 6.7 & 6.4 & M4:   & \\
HC 2*  & 20 33 01.1 & +40 45 41 & A & 20312+4035 & 18.0 & 6.1 & 5.8 & M0    & \\
HC 3*  & 20 25 30.1 & +40 44 37 & A & 20236+4034 & 19.4 & 4.2 & 8.4 &       & \\
HC 4*  & 20 26 55.7 & +39 51 04 & S &            &      &     & 9.0 &       & \\
HC 6*  & 20 41 11.2 & +41 06 26 & S &            &      &     & 8.5 & M3:   & IRC +40440 \\
HC 7*  & 20 42 24.8 & +40 24 48 & S & 20405+4013 &      &     & 9.3 &       & \\
HC 8*  & 20 44 09.6 & +40 56 20 & A &            & 18.9 & 6.0 & 8.2 &       & \\
HC 9   & 17 56 34.8 &--19 51 01 & A & 17536--1950& 18.2 & 6.0 & 8.8 & M8    & \\
HC 10  & 18 03 43.1 &--18 41 01 & A &            & 18.6 & 3.8 & 7.9 & M8?   & \\
HC 11  & 18 04 40.9 &--19 17 43 & A & 18017--1917& 18.8 & 4.6 & 7.5 & M8:   & \\
HC 12  & 18 05 37.2 &--18 27 05 & A & 18026--1827& 20.3 & 4.3 & 9.2 & M8    & \\
HC 13  & 18 06 10.4 &--17 29 16 & A & 18032--1729& 20.0 & 2.2 & 9.3 & M8    & \\
HC 14  & 18 11 24.1 &--19 45 53 & A & 18084--1946& 20.6 & 5.1 & 8.1 &       & \\
HC 15* & 18 29 32.3 & $-$4 15 34 & I & 18268--0417&      &     & 8.9 & M7    & \\
HC 16  & 18 30 46.3 & $-$5 34 29 & S & 18281--0536&      &     & 9.3 & M7    & \\
HC 17  & 18 33 57.0 & $-$3 04 37 & A &            & 16.3 & 3.1 & 9.3 &       & \\
HC 18* & 18 34 37.4 & $-$2 51 22 & I & 18320--0253&      &     & 9   & M6?   & \\
HC 19  & 18 37 36.7 & $-$5 54 27 & S & 18349--0557&      &     & 9   & M7    & \\
HC 20  & 18 39 40.6 & $-$0 01 25 & S & 18370--0004&      &     & 9.4 & M6    & \\
HC 21  & 18 40 21.4 & $-$0 06 52 & S & 18377--0009&      &     & 8.9 & M8    & \\
HC 22  & 18 40 30.1 &  +0 46 09 & A & 18379+0043 & 19.7 & 4.1 & 9.5 & M6    & \\
HC 23  & 18 40 52.7 &  +0 45 45 & S & 18383+0042 &      &     & 9.4 & M7    & \\
HC 24  & 18 40 46.3 &  +1 09 58 & S & 18382+0107 &      &     & 9.5 & M6    & \\
HC 25  & 18 41 18.9 & $-$0 31 12 & S & 18387--0034&      &     & 8.9 & M9    & \\
HC 26  & 18 42 30.6 &  +0 07 07 & S & 18399+0004 &      &     & 8.9 & M7    & \\
HC 27* & 18 42 34.1 & $-$0 47 26 & S &            &      &     & 9.6 &       & \\
HC 28  & 18 43 13.3 & $-$0 13 38 & S & 18406--0016&      &     & 9.4 & M7    & \\
HC 29  & 18 44 22.0 &  +2 07 41 & A & 18418+0204 & 19.8 & 5.0 & 9.4 & M8    & \\
HC 30* & 18 45 19.4 &  +0 56 19 & S &            &      &     & 9.5 & M7    & \\
HC 31  & 18 45 56.1 & $-$0 51 57 & S & 18433--0055&      &     & 8.4 &       & \\
HC 32  & 18 45 57.8 & $-$1 14 17 & S & 18433--0117&      &     & 9.5 & M7    & \\
HC 33  & 18 47 00.1 & $-$1 22 39 & S & 18443--0126&      &     & 9.5 & M6    & \\
HC 34  & 18 47 02.4 &  +0 46 52 & S & 18444+0043 &      &     & 9.5 &       & \\
HC 35  & 18 49 25.4 &  +4 22 35 & A & 18469+0419 & 14.3 & 5.9 & 7.7 & M7    & \\
HC 36  & 18 49 42.8 &  +1 41 03 & S & 18471+0137 &      &     & 8.3 &       & \\
HC 37  & 18 49 58.0 & $-$0 24 53 & A &            & 18.9 & 3.6 & 9.3 & M6    & crowded \\
HC 38  & 18 51 15.3 &  +3 46 56 & S & 18487+0343 &      &     & 9.3 &       & \\
HC 39* & 18 50 36.1 & $-$0 29 04 & S &            &      &     & 9.1 &       & \\
HC 40  & 18 50 48.7 &  +1 25 58 & S & 18482+0122 &      &     & 8.8 &       & \\
HC 41  & 18 51 43.8 &  +1 05 43 & S &            &      &     & 9.5 & M6    & \\
HC 42  & 18 52 39.7 &  +0 11 41 & S &            &      &     & 9.5 & M     & variable \\
HC 43  & 18 55 01.0 &  +4 52 34 & S &            &      &     & 9   & M6?   & \\
HC 44  & 18 54 47.4 &  +0 25 28 & S & 18522+0021 &      &     & 7.2 & M7?   & NSV 11511 \\
HC 45  & 18 59 51.3 &  +8 16 48 & S & 18574+0812 &      &     & 9.4 & M9:   & EIC 728 \\
HC 46* & 19 01 16.3 &  +9 21 41 & S & 18588+0917 &      &     & 9.4 &       & \\
HC 47  & 19 02 09.9 &  +4 53 22 & S & 18596+0448 &      &     & 9   & M7    & \\
HC 48  & 19 02 25.0 &  +4 49 59 & S & 18599+0445 &      &     & 8.2 &       & EIC 734 \\
HC 49  & 19 03 19.0 &  +5 35 23 & S &            &      &     & 9.1 & M7    & \\
HC 50  & 19 03 05.0 &  +8 44 21 & S & 19006+0839 &      &     & 8.6 & M7    & \\
HC 51  & 19 03 51.8 &  +8 25 48 & S & 19014+0821 &      &     & 9.4 &       & \\
HC 52  & 19 04 55.8 &  +8 38 01 & S & 19025+0833 &      &     & 9.3 &       & \\
HC 53  & 19 09 49.9 &  +7 45 13 & S & 19074+0740 &      &     & 8.6 & M7:   & \\
HC 54  & 19 11 36.1 & +10 05 59 & S & 19092+1000 &      &     & 8.7 & M6    & \\
HC 55  & 19 12 41.1 &  +8 32 17 & S & 19102+0827 &      &     & 8.9 &       & \\
HC 56* & 19 12.7    &  +9 48    &   &            &      &     & 9.4 &       & \\
\hline				
\end{tabular}
\end{center}
			
\vfil				
\eject

\begin{center}
{Table 1:  Positions and identifications (cont'd.)} \\
\vskip 2mm
\begin{tabular}{lcccccclll}
\hline
Name & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& s & IRAS & mb & b$-$r &\,~I & spec & Remarks \\
\hline
HC 57  & 19 14 13.3 & +11 09 26 & S &            &      &     & 9.4 & M6?   & NSV 11835 \\
HC 58  & 19 14 30.4 & +10 50 47 & S & 19121+1045 &      &     & 9.1 & M8:   & not PN \\
HC 59  & 19 20 04.7 & +19 53 23 & S & 19178+1947 &      &     & 8   & M8    & OO Sge \\
HC 60  & 19 27 53.3 & +24 06 27 & S & 19257+2400 &      &     & 7.5 &       & \\
HC 61* & 19 37 00.4 & +21 43 42 & S & 19348+2136 &      &     & 7.9 & M8    & NSV 12208 \\
HC 62* & 17 56.9    &--19 17    &   &            &      &     & 7.3 & M7    & \\
HC 63  & 17 58 26.6 &--16 32 41 & A & 17555--1632& 18.9 & 3.5 & 8.2 & M6    & \\
HC 64  & 18 01 02.5 &--20 08 40 & S &            &      &     & 8   &       & \\
HC 65  & 18 03 11.7 &--20 05 11 & A & 18002--2005& 17.2 & 4.5 & 7   & M7:   & \\
HC 66  & 18 03 36.3 &--16 51 08 & A & 18007--1651& 16.6 & 3.7 & 7   & M7    & \\
HC 67  & 18 05 27.6 &--19 33 13 & A & 18024--1933& 18.5 & 4.1 & 8.1 & M7    & \\
HC 68* & 18 06 14.9 &--18 58 55 & A & 18032--1859& 16.8 & 1.3 & 8.0 & M6    & \\
HC 69* & 18 11 56.9 &--19 52 22 & A & 18089--1953& 18.4 & 3.3 & 8.1 & C/S:  & CGCS 3964 \\
HC 70  & 18 31 34.9 & $-$4 44 11 & A & 18289--0446& 19.2 & 5.3 & 7.9 & M6.5e?& \\
HC 71  & 18 32 08.1 & $-$3 58 41 & A & 18294--0400& 19.7 & 5.3 & 8.5 & M6.5  & \\
HC 72  & 18 33 06.7 & $-$4 12 41 & A & 18304--0415& 19.7 & 4.3 & 9   & M6    & \\
HC 73  & 18 33 43.8 & $-$6 01 30 & A & 18310--0603& 19.3 & 5.3 & 8.3 & M6?   & \\
HC 74  & 18 33 45.0 & $-$3 13 30 & A & 18311--0315& 18.9 & 4.6 & 8.1 & M7    & \\
HC 75  & 18 36 34.6 & $-$4 22 20 & S & 18339--0424&      &     & 8   &       & \\
HC 76  & 18 36 35.3 & $-$5 44 49 & A & 18338--0547& 18.3 & 4.0 & 7.9 & M8    & \\
HC 77  & 18 37 39.2 & $-$3 53 03 & A & 18350--0355& 18.3 & 4.3 & 8.7 & M7:   & \\
HC 78  & 18 42 07.8 & $-$1 05 01 & A & 18395--0108& 19.5 & 4.7 & 8.9 & M7:   & \\
HC 79  & 18 42 37.5 & $-$1 23 33 & A & 18400--0126& 19.1 & 4.5 & 9   & M6    & \\
HC 80  & 18 44 47.9 &  +0 22 31 & F & 18422+0019 & 19.3 & 5.7 & 7.5 & M6    & FASTT 1187 \\
HC 81  & 18 45 04.3 & $-$0 46 47 & F &            & 19.3 & 4.6 & 9   & M7:   & FASTT 1270 \\
HC 82* & 18 46 05.1 & $-$0 03 12 & A &            & 19.4 & 4.8 & 8.6 & M6    & \\
HC 83  & 18 47 02.4 &  +1 14 17 & A & 18444+0110 & 19.7 & 4.9 & 8.7 & M6    & \\
HC 84  & 18 48 10.6 &  +1 46 39 & A & 18456+0143 & 18.7 & 5.4 & 7.9 & M6    & \\
HC 85  & 18 48 27.8 &  +0 21 56 & S &            &      &     & 8.6 & M6    & \\
HC 86  & 18 49 34.3 &  +5 57 19 & A &            & 17.9 & 4.6 & 7.2 & M7    & \\
HC 87* & 18 49 47.8 &  +6 00 27 & A &            & 17.8 & 5.1 & 7   & M7    & \\
HC 88  & 18 50 26.0 &  +4 36 05 & A & 18479+0432 & 19.7 & 5.9 & 7   & M8:   & \\
HC 89  & 18 51 42.6 &  +3 46 37 & S & 18492+0342 &      &     & 9   & M7:   & \\
HC 90  & 18 51 10.2 &  +1 35 13 & A & 18486+0131 & 19.5 & 5.0 & 8   & M6    & \\
HC 91  & 18 52 10.6 &  +5 51 40 & A & 18497+0547 & 19.1 & 5.1 & 8.3 & M7    & \\
HC 92  & 18 52 27.4 &  +5 15 11 & A & 18499+0511 & 19.8 & 4.0 & 9.4 &       & \\
HC 93  & 18 51 38.1 &  +2 22 28 & A &            & 19.2 & 4.4 & 8.6 &       & \\
HC 94  & 18 52 24.5 &  +5 34 51 & S &            &      &     & 9.3 & M6.5  & \\
HC 95  & 18 54 09.1 &  +6 25 58 & A & 18517+0622 & 19.1 & 4.7 & 7.2 & M7:   & \\
HC 96* &18 54 41.8 & +6 24 12 & S & 18522+0620 &      &     & 9.2 & M7:   & \\
HC 97  & 18 54 02.4 &  +0 15 35 & F & 18514+0011 & 17.7 & 4.4 & 7.9 & M6    & FASTT 1211 \\
HC 98  & 18 56 23.8 &  +4 45 14 & A &            & 19.4 & 4.9 & 7.2 & M8    & \\
HC 99  & 19 00 18.0 & +10 11 18 & A & 18579+1006 & 18.5 & 4.2 & 8   & M7    & \\
HC 100 & 19 00 50.3 &  +9 12 24 & S & 18584+0908 &      &     & 9.3 &       & \\
HC 101 & 19 02 05.8 &  +9 23 14 & A & 18597+0918 & 19.2 & 3.9 & 8.6 & M6    & \\
HC 102 & 19 02 13.1 &  +9 11 28 & A & 18598+0907 & 19.5 & 4.3 & 8.5 & M6    & \\
HC 103 & 19 03 26.4 &  +3 43 06 & A & 19008+0338 & 17.0 & 3.1 & 9   & M7:   & \\
HC 104 & 19 08 28.3 & +14 58 55 & A & 19061+1454 & 18.4 & 3.9 & 7.9 &       & \\
HC 105 & 19 10 39.1 & +10 13 06 & S & 19082+1008 &      &     & 8.8 & M7:   & \\
HC 106 & 19 11 15.0 & +11 12 21 & A & 19088+1107 & 18.4 & 4.3 & 8.5 & M6    & \\
HC 107 & 19 13 10.0 &  +9 46 13 & A & 19107+0941 & 19.1 & 5.3 & 8.4 & M6    & \\
HC 108 & 19 13 53.0 &  +8 44 12 & A &            & 18.3 & 3.8 & 8.7 & M6.5  & \\
HC 109 & 19 14 14.5 &  +7 45 26 & A & 19118+0740 & 19.7 & 4.8 & 8.8 & M6    & \\
HC 110 & 19 16 13.1 & +12 18 18 & A & 19138+1212 & 19.0 & 5.3 & 7.5 & M7    & \\
\hline				
\end{tabular}			
\end{center}			
\vfil				
\eject

\begin{center}
{Table 1:  Positions and identifications (cont'd.)} \\
\vskip 2mm
\begin{tabular}{lcccccclll}
\hline
Name & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& s & IRAS & mb & b$-$r &\,~I & spec & Remarks \\
\hline
HC 111 & 19 16 55.9 & +13 09 04 & A & 19146+1303 & 19.1 & 4.2 & 7.8 & M6    & \\
HC 112 & 19 18 10.7 & +13 45 19 & A & 19158+1339 & 18.1 & 4.4 & 7.4 & M7:   & \\
HC 113 & 19 19 38.5 & +14 05 57 & S & 19173+1400 &      &     & 7.8 & M6.5  & \\
HC 114 & 19 19 55.8 & +12 54 36 & S & 19176+1248 &      &     & 6.6 &       & \\
HC 115 & 19 21 55.7 & +20 12 11 & A & 19197+2006 & 19.1 & 4.6 & 8.8 & M8    & \\
HC 116 & 19 22 01.3 & +19 44 40 & A & 19198+1938 & 19.1 & 4.4 & 8.8 & M7    & \\
HC 117 & 19 23 27.3 & +18 38 05 & A &            & 19.4 & 4.2 & 8.9 & M7:   & \\
HC 118 & 19 24 16.7 & +17 23 51 & A & 19220+1717 & 20.2 & 4.9 & 9   & M7    & \\
HC 119 & 19 24 48.4 & +19 48 18 & A &            & 19.8 & 4.4 & 8.6 & M6    & \\
HC 120 & 19 25 15.6 & +18 55 26 & A & 19230+1849 & 19.6 & 4.9 & 8.9 & M6?   & \\
HC 121 & 19 26 19.1 & +16 40 32 & A & 19240+1634 & 18.5 & 3.8 & 7.8 & M8    & NSV 12022 \\
HC 122 & 19 26 17.0 & +18 12 16 & A & 19240+1806 & 20.2 & 4.8 & 6.7 & M9:   & PV Sge \\
HC 123 & 19 28 04.9 & +23 48 38 & A & 19259+2342 & 18.2 & 4.2 & 8.3 & M7    & \\
HC 124 & 19 28 57.8 & +20 54 24 & A & 19267+2048 & 18.3 & 4.5 & 8.6 & M7:   & \\
HC 125 & 19 29 27.5 & +18 39 40 & A &            & 19.3 & 4.9 & 8.9 &       & \\
HC 126 & 19 29 41.2 & +18 42 08 & A & 19274+1835 & 19.9 & 6.2 & 8   & M8    & \\
\hline				
\end{tabular}			

\medskip						
Notes:\hfill
\smallskip				
	
\begin{tabular}{rp{14.15cm}}			
HC 1 &  SIMBAD position slightly in error,  spectral type from Pesch (1967). \\
HC 2 &  GSC 3157-0317; SIMBAD position somewhat in error,  spectral type from Kwok {\it et al}.\ (1997). \\
HC 3 &  eastern of two stars. \\
HC 4 &  eastern star of merged pair. \\
HC 6 &  also StRS 381,  spectral type from Pesch (1967); M0I in Imanishi
{\it et al}.\ (1996), and M3/4III in Goto {\it et al}.\ (1997). \\
HC 7 &  western star of merged pair. \\
HC 8 &  northwestern star of merged pair. \\
HC 15 &  extremely faint on DSS, IRAS coordinates roughly confirmed. \\
HC 18 &  not visible on DSS, IRAS coordinates roughly confirmed on POSS-II
         IIIa-F film. \\	
HC 27 &  northeastern star of pair; just outside error ellipse of IRAS 18399--0050. \\
HC 30 &  if chart ID is correct, this is {\it not} IRAS 18427+0053 = FASTT 1171. \\
HC 39 &  outside error ellipse of IRAS 18480--0032. \\
HC 46 &  near edge of IRAS error ellipse. \\
HC 56 &  not found; nominal Chavira coordinates shown. \\
HC 61 &  just outside IRAS error ellipse. \\
HC 62 &  not found; nominal Chavira coordinates shown. \\
HC 68 &  very faint on DSS. \\
HC 69 &  spectral type from Kwok {\it et al}.\ (1997). \\
HC 82 &  eastern star of merged pair. \\
HC 87 &  near but outside error ellipse of IRAS 18472+0556. \\
HC 96 &  Chavira chart has south up, east right. \\
\end{tabular}
\end{center}

\large

\vskip-11pt

\references			
				
Chavira, E., 1967, {\it Bol.\ Obs.\ Tonantz.\ Tacub}., {\bf 4}, 197

Goto, M., Sasaki, Y., Imanishi, M., Nagata, T., and Jones, T. J., 1997,
{\it Publ.\ Astron.\ Soc.\ Japan}, {\bf 49}, 485

Henden, A. A., and Stone, R. C., 1998, {\it Astron.\ J}., {\bf 115}, 296

Imanishi, M., Sasaki, Y., Goto, M., Kobayashi, N., Nagata, T., and Jones,
T. J., 1996, {\it Astron.\ J}., {\bf 112}, 235

Kwok, S., Volk, K., Bidelman, W. P., 1997, {\it Astrophys.\ J., Suppl.\ Ser}.,
{\bf 112}, 557

Johnson, H. L., Mendoza, E. E., and Wisniewski, W. Z., 1965,
{\it Astrophys.\ J}., {\bf 142}, 1249

McGlynn, T., Scollick, K., and White, N., 1996, {\tt http://skview.gsfc.nasa.gov}

Monet, D., {\it et al}., 1998, USNO--A2.0; U.S. Naval Observatory, Washington
DC; see also \\
{\tt http://www.usno.navy.mil/pmm}

Pesch, P., 1967, {\it Astrophys.\ J}., {\bf 147}, 381

\end{document}			

