J/other/Obs/142.207 UBVRI phot. for galaxies, Gal. GCs & stars (Corwin, 2022)
UBV(RI)c aperture photometry for large galaxies, Galactic globular clusters, and
stars.
Corwin H.G.
<The Observatory 142, 207 (2022)>
=2022Obs...142..207C 2022Obs...142..207C (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, UBVRI; Galaxies, nearby; Clusters, globular;
Stars, standard; Colors
Description:
From 1982 January to 1988 October, I used the 76-cm and 91-cm (30-inch
and 36-inch) reflectors at McDonald Observatory in West Texas for
UBV(RI)c observations of 239 galaxies, 18 Galactic globular
clusters, 550 stars, and 11 miscellaneous objects.
My goal with this program was to collect large-aperture (UBV)J(RI)C
Johnson/Cousins photometry for galaxies with D25 larger than 5.0'.
My envisioned uses of such data included calibration of surface
photometry, derivation of total magnitudes and color indices, studies
of the luminosity function of nearby galaxies, and support of other
programs needing photometric data. The final tally: 594 observations
of 239 galaxies. Along the way, I obtained aperture photometry of
18 Galactic globular clusters and more than 550 stars, and set up an
internally consistent system of secondary standard stars around the
equator.
Robert Smyth did the southern observing during his 1980-81 post-doc at
Siding Spring in New South Wales, Australia. He used the (now
decommissioned) 41-cm and 61-cm telescopes there with the standard
photometers and the same observational techniques I used at McDonald.
As a part of a larger program of galaxy photometry, Marian Frueh --
ably assisted on two nights by Shireen Gonzaga -- collected UBV data
for stars around 23 bright galaxies. We published the galaxy
photometry (Frueh+ 1996AJ....111..722F 1996AJ....111..722F) but not the sequence stars.
Many of those stars' V magnitudes appeared on the Thompson/Bryan
"Supernova Search Charts", but the entirety of the data appear here
for the first time.
So, I present here three sets of Johnson/Cousins UBVRI and UBV data
generally focussed on galaxies, or on stars near galaxies. I made the
UBVRI observations of northern objects at McDonald Observatory in the
Davis Mountains in west Texas, while Robert Smyth covered the southern
objects at Siding Spring Observatory in New South Wales, Australia.
The stellar data include supernova comparison sequences, many observed
at McDonald by Marian Frueh and Shireen Gonzaga, as well as a set of
secondary equatorial standard stars on the UBVRI Johnson/Cousins
systems that I set up with help from Robert Smyth and Mike Bessell at
Siding Spring, Alan Cousins and John Menzies at the SAAO, and Tom
Moffett and Tom Barnes at McDonald.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 76 193 *Standard star data: adopted UBV(RI)c magnitudes
and colors for stars used as standards for the
McDonald observation
table2.dat 168 592 McDonald galaxy observations with all measured
superposed stars removed
notes2.dat 110 350 Notes on Table 2 sources
table3.dat 136 702 *McDonald UBVRI observations of stars and
other objects
table4.dat 118 42 Globular cluster photometry, with and without
superposed stars
table5.dat 121 101 *Sequences and supernovae observed by Marian Frueh
and Shireen Gonzaga with the 76- and 91-cm
McDonald reflectors (1985-86)
table6.dat 159 347 Siding Spring photometry of large southern galaxies
by Robert Smyth, 1980-1981
notes6.dat 100 191 Notes on Table 6 sources
table7.dat 132 198 Photometry and positions for stars measured at
Siding Spring by Robert Smyth or mentioned in
Smyth's Notes
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Note on table1.dat: These are *secondary* equatorial standards based on the
Cousins E-region standards at -45 degrees. The Cousins RI system was
transferred to the equatorial Selected Areas by Robert Smyth and
Michael Bessell, using stars already established as UBV standards by
Landolt. Additional stars come from the lists of Moffett and Barnes
and Kunkel and Rydgren. See the text for details.
Note on table3.dat: They are the following:
A = Superposed stars subtracted from the galaxy photometry
B = Sequences, primarily in Gregg Thompson and
James Bryan's "Supernova Search Atlas"
C = Supernovae, HII regions, BL Lacs, white dwarves, variables, etc.
D = Stars observed for Jim Wray's "Color Atlas of Galaxies"
E = Stars observed for Robert Smyth (superposed on galaxies he observed)
Note on table5.dat: See Frueh+ 1996AJ....111..722F 1996AJ....111..722F for further information
about the main observing program.
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See also:
VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
VII/112 : RC2 Catalogue (de Vaucouleurs+ 1976)
VII/34 : ESO/Uppsala Survey of the ESO(B) Atlas (Lauberts 1982)
VII/116 : Southern Galaxy Catalogue (SGC) (Corwin+ 1985)
II/117 : Catalog of UBVRI Photometry of Globular Clusters (Peterson 1986)
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
I/254 : The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)
VII/206 : General Photometry of Galaxies (Prugniel+ 1998)
VII/239 : History and Accurate Positions for the NGC/IC Objects (Corwin, 2004)
J/AJ/108/2128 : RC3 corrections and additions (Corwin+ 1994)
J/A+AS/103/573 : UBVRI Photometry of bright southern galaxies (Poulain+ 1994)
J/AJ/109/517 : Photoelectric types of bright galaxies (Buta+ 1995)
J/AN/322/73 : BVIc photometry in NGC 2976 (Notni+, 2001)
J/ApJS/162/80 : BVRJHKgr photometry of bright spiral galaxies (Kassin+, 2006)
J/AJ/133/2502 : UBVRI Standard Stars (Landolt, 2007)
J/MNRAS/485/3042 : UBVRI photometry in 48 globular clusters (Stetson+, 2019)
http://haroldcorwin.net/ubvri/galptmy.html : Additional online data
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 19 A9 --- HD/BD HD or BD identifier
21- 22 I2 h RAh Hour of right ascension (J2000)
24- 25 I2 min RAm Minute of right ascension (J2000)
27- 30 F4.1 s RAs Second of right ascension (J2000)
32 A1 --- DE- Sign of declination (J2000)
33- 34 I2 deg DEd Degree of declination (J2000)
36- 37 I2 arcmin DEm Arcminute of declination (J2000)
39- 40 I2 arcsec DEs Arcsecond of declination (J2000)
42- 47 F6.3 mag Vmag [5.39/13.63] V magnitude
49- 53 F5.3 mag B-V [-0.22/2] B-V color index
55- 59 F5.3 mag U-B [-0.93/2.3] U-B color index
61- 65 F5.3 mag V-Rc [-0.1/1.14] V-Rc color index
67- 71 F5.3 mag V-Ic [-0.23/2.3] V-Ic color index
73- 74 I2 --- Ntot [1/25] Total number of observations; including
stars with more than one observation on a
single night
76 A1 --- f_Name Note on the star (1)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
a = SIMBAD notes 94-308 as a double or multiple star.
b = SIMBAD notes 95-52 as a variable. The one observation here is in good
agreement with Landolt and SAAO.
c = 97-257 includes fainter companion just east.
d = SIMBAD notes 99-185 as a variable. The four observations here suggest
constancy.
e = SIMBAD notes HD75012 as a double or multiple star.
f = HD75138+* includes the nearby star at 08 48 19.0 +00 33 25
(Hipparcos pos.)
g = 104-110137c position from Gaia DR1.
h = SIMBAD notes HD111133 as an [alpha]2 CVn variable. The three observations
here suggest constancy.
i = SIMBAD notes HD140873 as a spectroscopic binary.
j = 109-199+* includes the nearby star at 17 45 03.0 -00 29 35 (Gaia DR1 pos.)
k = 110-353 = HK Aql, long-period variable candidate; SIMBAD notes this as a
Landolt standard, calling it NOT (their caps) a variable. The McDonald
observations also suggest constancy.
l = SIMBAD notes 110-196 as a double or multiple star.
m = 113-276+* includes the star at 21 42 27.6 +00 26 11 (2MASS PSC pos.)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15- 18 F4.2 0.1arcmin logAp [0.2/1.6] Logarithm of the aperture
20- 25 F6.3 mag Vmag [6.1/16.5] V magnitude
26 A1 --- u_Vmag Uncertainty flag on Vmag
28- 33 F6.3 mag B-V [-0.77/1.5] B-V color index
34 A1 --- u_B-V Uncertainty flag on B-V
36- 41 F6.3 mag U-B [-0.8/1.9] U-B color index
42 A1 --- u_U-B Uncertainty flag on U-B
44- 49 F6.3 mag V-Rc [-0.08/1]? V-Rc color index
50 A1 --- u_V-Rc Uncertainty flag on V-Rc
52- 56 F5.3 mag V-Ic [0.07/2]? V-Ic color index
57 A1 --- u_V-Ic Uncertainty flag on V-Ic
59- 68 A10 "Y/M/D" Date Date of observation; UT minus 1 day
70- 71 I2 h RAh Hour of right ascension (J2000)
73- 74 I2 min RAm Minute of right ascension (J2000)
76- 79 F4.1 s RAs Second of right ascension (J2000)
81 A1 --- DE- Sign of declination (J2000)
82- 83 I2 deg DEd Degree of declination (J2000)
85- 86 I2 arcmin DEm Arcminute of declination (J2000)
88- 89 I2 arcsec DEs Arcsecond of declination (J2000)
91-107 A17 --- MType Morphological type
109-112 F4.2 [0.1arcmin] logDiam [0.2/3.3]? Log of diameter
114-117 F4.2 --- logR [0/1.2]? Axis ratio, D/d
119-123 I5 --- V(0) [-345/7639]? Heliocentric velocity
125 A1 --- n_Name Note on Name (see notes2.dat file)
127-168 A42 --- OID Other identifier(s)
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Byte-by-byte Description of file: notes2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15- 24 A10 "Y/M/D" Date UT date -1 day
26- 29 A4 [0.1arcmin] logAp log aperture (0.74-1.60; "Both" or "All")
31- 110 A80 --- Note Text of the note (1)
--------------------------------------------------------------------------------
Note (1): Abbreviations (also see RC2 or RC3):
EE = "Ex-centered to exclude" a star that would have otherwise been included
SEE = "Slightly ex-centered to exclude" a star ...
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Name Source name (1)
20- 23 F4.2 [0.1arcmin] logAp [0.2/1.6] Logarithm of the aperture
25- 30 F6.3 mag Vmag [5.9/16.4] V magnitude (2)
31 A1 --- u_Vmag Uncertainty flag on Vmag
33- 38 F6.3 mag B-V [-0.31/2.7] B-V color index (2)
39 A1 --- u_B-V Uncertainty flag on B-V
41- 46 F6.3 mag U-B [-1.2/2.2]? U-B color index (2)
47 A1 --- u_U-B Uncertainty flag on U-B
49- 54 F6.3 mag V-Rc [-0.12/1.2]? V-Rc color index (2)
55 A1 --- u_V-Rc Uncertainty flag on V-Rc
57- 62 F6.3 mag V-Ic [-0.4/2.6]? V-Ic color index (2)
63 A1 --- u_V-Ic Uncertainty flag on V-Ic
65- 74 A10 "Y:M:D" Date Date of observation (UT)
76- 77 I2 h RAh Hour of right ascension (J2000)
79- 80 I2 min RAm Minute of right ascension (J2000)
82- 85 F4.1 s RAs Second of right ascension (J2000)
87 A1 --- DE- Sign of declination (J2000)
88- 89 I2 deg DEd Degree of declination (J2000)
91- 92 I2 arcmin DEm Arcminute of declination (J2000)
94- 95 I2 arcsec DEs Arcsecond of declination (J2000)
97- 98 A2 --- Ref Position source code (3)
100- 136 A37 --- Comm Other names / notes (4)
--------------------------------------------------------------------------------
Note (1): I've almost always lettered the stars, starting with "A". The
letters rarely extend beyond "E" or "F", though some of the sequences
use letter designations from published papers; those can extend quite
a ways into the alphabet. Most letters are upper case, though some --
again, primarily from published papers -- are lower case. If I had to
deal with only one star superposed on a galaxy, that star is almost
always designated by an asterisk "*". Sometimes, a single letter is
used; this generally means that I intended to measure other stars, but
could not because of weather or time constraints. "w", "ne" etc
preceded by small numbers are distances and directions of stars from
the nucleus (or center) of the galaxy involved. "B*" flags stars from
Jim Wray's "Color Atlas".
Star names of the form NNNN-NNNN come from the Guide Star Catalog.
Note (2): Magnitudes at logAp=0.49 corrected by -0.01, at
logAp=0.20 corrected by -0.04, for scattering losses.
Note (3): Position source codes as follows:
G = GSC v1.1, I/220
A = USNO-A2.0, I/252
C = AC2000, I/247
S = Skiff measurement
G2 = Gaia DR2, Cat. I/345
Position source from Brian Skiff, except for G2; with thanks.
Note (4): For supernova sequence stars, see:
NGC 0224 = de Vaucouleurs and Corwin 1985ApJ...295..287D 1985ApJ...295..287D
NGC 1003 = Baade and Zwicky, 1938ApJ....88..411B 1938ApJ....88..411B
NGC 3031 = de Vaucouleurs, Corwin, and Skiff, 1994PASP..106..156D 1994PASP..106..156D
NGC 4636 = Giclas PASP 51, 166, 1939 and Beyer 1939AN....268..341B 1939AN....268..341B
NGC 4753 = Buta, Corwin, and Opal 1985PASP...97..229B 1985PASP...97..229B for background
subtraction details.
IC 4182 = Baade and Zwicky 1938ApJ....88..411B 1938ApJ....88..411B
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Globular cluster name
12- 18 A7 --- f_Name Flags on Name
20- 23 F4.2 [0.1arcmin] logAp [1.1/1.6] Logarithm of the aperture
25- 30 F6.3 mag Vmag [6.47/13.8] V magnitude
32- 36 F5.3 mag B-V [0.5/2.3] B-V color index
38- 43 F6.3 mag U-B [-0.006/2.5] U-B color index
45- 49 F5.3 mag V-Rc [0.36/1.33] V-Rc color index
51- 55 F5.3 mag V-Ic [0.77/2.65] V-Ic color index
57- 66 A10 "Y/M/D" Date Date of observation (UT-1 day)
68- 69 I2 h RAh Hour of right ascension (J2000)
71- 72 I2 min RAm Minute of right ascension (J2000)
74- 77 F4.1 s RAs Second of right ascension (J2000)
79 A1 --- DE- Sign of declination (J2000)
80- 81 I2 deg DEd Degree of declination (J2000)
83- 84 I2 arcmin DEm Arcminute of declination (J2000)
86- 87 I2 arcsec DEs Arcsecond of declination (J2000)
89- 92 F4.1 arcmin D25 [2.2/20] Diameter at mu=25.0V*sqarcsec^-1)
94 A1 --- n_Name Note on name (1)
96- 118 A23 --- Comm Notes appended
--------------------------------------------------------------------------------
Note (1): Note as follows:
a = 6-7 field stars compensated in skies.
b = Ditto.
c = Several field stars compensated in skies.
d = Two pretty bright stars west just out. Affected by clouds?
e = Many field stars compensated in skies.
f = Bright star substracted.
g = 3-4 faint stars included, compensated in skies.
h = Not NGC 6749; that is an open cluster about 5' south-southwest.
i = 2-3 faint stars compensated in skies.
j = One star substracted aperture slightly ex-centered to exclude others,
remainder compensated in skies.
k = Star A substracted
l = Stars A-C substracted
m = 9 GC+skies, 8 skies.
n = Several very faint stars in aperture, compensated in skies;
slightly ex-centered to exclude a star. 9 globular cluster plus skies,
8 skies.
o = Centered at 16:59:48.7-00:32:04.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Star name
19 A1 --- n_Name Note on NGC 5128 (1)
21- 24 F4.2 [0.1arcmin] logAp [0.14/0.5] Logarithm of the aperture
26- 31 F6.3 mag Vmag [8/16] V magnitude (2)
33- 37 F5.3 mag B-V [0.08/1.3] B-V color index
39- 44 F6.3 mag U-B [-0.32/1.4] U-B color index
45 A1 --- u_U-B Uncertainty flag on U-B
47- 56 A10 "Y/M/D" Date Date of observation; UT (and not UT-1)
58 A1 --- Obs Observer (F=Marian Frueh, G=Shireen Gonzaga)
60- 61 I2 h RAh Hour of right ascension (J2000)
63- 64 I2 min RAm Minute of right ascension (J2000)
66- 69 F4.1 s RAs Second of right ascension (J2000)
71 A1 --- DE- Sign of declination (J2000)
72- 73 I2 deg DEd Degree of declination (J2000)
75- 76 I2 arcmin DEm Arcminute of declination (J2000)
78- 79 I2 arcsec DEs Arcsecond of declination (J2000)
81- 99 A19 --- r_Pos Position source code (3)
101- 109 A9 --- GSC GSC identifier if any
111- 121 A11 --- Comm Note appended
--------------------------------------------------------------------------------
Note (1): Note as follows:
a = The NGC 5128 supernova and sequence stars were corrected to the zero
point of the Tycho photometric BT, VT system using star A with
VT=9.14 and (BT-VT)=0.35 (this procedure was suggested by B. Skiff).
Note (2): V magnitudes at logAp=0.14 corrected by -0.03 for scattering losses.
Note (3): Position source codes as follows:
GSC = GSC v1.1, see I/254
A = USNO-A2.0, I/252
C = AC2000, I/247
G2 = Gaia DR2, Cat. I/345
Reference 1993BICDS..42...17T 1993BICDS..42...17T from NED
Brian Skiff provided most of these positions; except G2 (thanks, Brian!)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Galaxy name
15- 18 F4.2 [0.1arcmin] logAp [0.8/1.64] Logarithm of the aperture
20- 24 F5.2 mag Vmag [8.4/15.5]? V magnitude
25 A1 --- u_Vmag [:?] Uncertainty flag on Vmag
27- 31 F5.2 mag B-V [-0.15/1.5]? B-V color index
32 A1 --- u_B-V [:?] Uncertainty flag on B-V
34- 38 F5.2 mag U-B [-0.6/1]? U-B color index
39 A1 --- u_U-B [:?] Uncertainty flag on U-B
41- 45 F5.2 mag V-Rc [-0.3/1]? V-Rc color index
46 A1 --- u_V-Rc [:?] Uncertainty flag on V-Rc
48- 52 F5.2 mag V-Ic [0.2/2]? V-Ic color index
53 A1 --- u_V-Ic Uncertainty flag on V-Ic
55- 64 A10 "Y/M/D" Date Date of observation (UT)
65 A1 --- f_Date Flag on observation date (1)
67- 68 I2 h RAh Hour of right ascension (J2000)
70- 71 I2 min RAm Minute of right ascension (J2000)
73- 76 F4.1 s RAs Second of right ascension (J2000)
78 A1 --- DE- Sign of declination (J2000)
79- 80 I2 deg DEd Degree of declination (J2000)
82- 83 I2 arcmin DEm Arcminute of declination (J2000)
85- 86 I2 arcsec DEs Arcsecond of declination (J2000)
88- 105 A18 --- MType Morphological type
107- 110 F4.2 [0.1arcmin] logDiam [0.8/2.5] Log of diameter
111 A1 --- u_logDiam Uncertainty flag on logDiam
113- 116 F4.2 --- logR [0/0.97] Axis ratio, D/d
117 A1 --- u_logR Uncertainty flag on logR
119- 123 I5 --- V(0) [-238/5050] Heliocentric velocity
124 A1 --- u_V(0) Uncertainty flag on V(0)
126 A1 --- n_Name [*] Note on Name (see notes6.dat file)
128- 159 A32 --- OID Other identifier
--------------------------------------------------------------------------------
Note (1): Observations made on dates flagged with single asterisks "*" were
made with the 61-cm telescope; all other observations were made with
the 41-cm telescope.
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Byte-by-byte Description of file: notes6.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15- 100 A86 --- Note Text of the note (abbreviations as in RC2)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name Star name and star's distance in arcminutes,
with the direction from the galaxy's center (1)
25- 29 F5.2 mag Vmag [7.19/15.6]? V magnitude (2)
30 A1 --- u_Vmag [:?] Uncertainty flag on Vmag
32- 36 F5.2 mag B-V [-0.08/1.6]? B-V color index (2)
37 A1 --- u_B-V Uncertainty flag on B-V
39- 43 F5.2 mag U-B [-0.6/1.9]? U-B color index (2)
44 A1 --- u_U-B Uncertainty flag on U-B
46- 50 F5.2 mag V-Rc [-0.02/1]? V-Rc color index (2)
51 A1 --- u_V-Rc Uncertainty flag on V-Rc
53- 57 F5.2 mag V-Ic [-0.2/2.2]? V-Ic color index (2)
58 A1 --- u_V-Ic Uncertainty flag on V-Ic
60- 69 A10 "Y/M/D" Date Date of observation (UT), assumed to be the
same as for the galaxy
70- 71 A2 --- f_Date Uncertain flag on observation date, or
HC=McDonald photometry by H. Corwin
73- 74 I2 h RAh Hour of right ascension (J2000)
76- 77 I2 min RAm Minute of right ascension (J2000)
79- 82 F4.1 s RAs Second of right ascension (J2000)
84 A1 --- DE- Sign of declination (J2000)
85- 86 I2 deg DEd Degree of declination (J2000)
88- 89 I2 arcmin DEm Arcminute of declination (J2000)
91- 92 I2 arcsec DEs Arcsecond of declination (J2000)
94- 132 A39 --- Comm Comment (G3e=position from Gaia EDR3) and/or
alternate names
--------------------------------------------------------------------------------
Note (1): Observing aperture are not recorded for the stars aside from one
double star near IC 983 where Smyth used (and recorded) a larger
aperture to include both stars. I am guessing that he used ∼30 arcsec
apertures for the majority of these stars.
Note (2): Missing photometry indicates the star was included in the galaxy
photometry; when/if the magnitude and colors become available, they
could be subtracted from the galaxy photometry.
--------------------------------------------------------------------------------
History:
Tables downloaded from:
http://haroldcorwin.net/misc/index.html
(End) Emmanuelle Perret [CDS] 25-Mar-2024