J/ApJS/259/6 Dwarf irregular galaxy Leo A. II. R and Ha obs. (Stonkute+, 2022)
Dwarf irregular galaxy Leo A.
II. Suprime-Cam R and Hα stellar photometry.
Stonkute R., Vansevicius V.
<Astrophys. J. Suppl. Ser., 259, 6 (2022)>
=2022ApJS..259....6S 2022ApJS..259....6S
ADC_Keywords: Galaxies, nearby; Photometry, H-alpha; Photometry, UBVRI
Keywords: Dwarf irregular galaxies ; Stellar photometry ; Catalogs ;
Galaxies ; Dwarf galaxies
Abstract:
We have surveyed the complete extent of Leo A, which is an apparently
isolated Local Group dwarf irregular galaxy, in B, V, R, I (the
Johnson-Cousins system), and NA656 (centered on Hα) passbands
with the Subaru Telescope equipped with the Suprime-Cam mosaic camera.
B, V, and I photometry results were published earlier by Stonkute+
(2014, J/ApJS/214/19). The recently published Stetson's high-quality
photometric standards in the R passband encouraged us to calibrate and
make available to the community deep (R∼25mag) R and NA656 photometry
results in the field of Leo A (20'x24'). We present the photometry
catalog of 28,224 objects in R and 25,800 objects in NA656 passbands.
This catalog could serve for future imaging and spectroscopic
observation programs of Leo A, especially targeted to study
emission-line objects. Also, we demonstrate the capability of the B,
V, R, and NA656 passband system to separate Milky Way M-type dwarfs
and late-type evolved stars in external galaxies, as well as to
recognize early-type (Be, B[e]) emission-line stars.
Description:
Subaru Suprime-Cam images of Leo A were acquired on 2002-November-4
(P.I. Nobuo Arimoto) through the broadband R (the Johnson-Cousins
system) and the narrow nonstandard passband NA656 filters. The central
wavelength of this passband is 6566Å, which approximately coincides
with Hα; the FWHM of the filter's transmission curve is 140Å.
Objects:
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RA (ICRS) DE Designation(s)
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09 59 26.00 +30 46 50.0 Leo A = NAME Leo A
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 99 28224 The Subaru Suprime-Cam photometry catalog
in the Leo A field
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See also:
B/subaru : Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2007)
J/A+A/317/448 : BVRHalpha photometry of NGC 1818 (Grebel 1997)
J/AJ/123/3154 : RV light curves of variable stars in Leo A (Dolphin+, 2002)
J/AJ/144/134 : LITTLE THINGS survey of nearby dwarf galaxies (Hunter+, 2012)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/ApJS/214/19 : Suprime-Cam wide-field photometry of Leo A (Stonkute+, 2014)
J/ApJ/834/9 : Spectroscopy obs. of LeoA, Aqr & Sgr dwarf gal. (Kirby+, 2017)
J/A+A/614/A144 : Phot. of stars in the LeoA HST WFC3 field (Stonkute+, 2018)
J/MNRAS/485/3042 : UBVRI photometry in 48 globular clusters (Stetson+, 2019)
http://www.canfar.net/storage/vault/list/STETSON/homogeneous : Stetson standard
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- ID Suprime-Cam catalog source identifier
(<[SAH2014] JHHMMSS.ss+DDMMSS.s> in Simbad)
21- 29 F9.5 deg RAdeg [149.66/150.1] Right Ascension (J2000) (1)
31- 39 F9.5 deg DEdeg [30.58/31] Declination (J2000) (1)
41- 46 F6.3 mag Vmag [19.32/26.7] The Johnson-Cousins V band magnitude
48- 53 F6.3 mag B-V [-0.77/2.8]? The Johnson-Cousins (B-V) color index
55- 60 F6.3 mag V-I [-0.87/4.93] The Johnson-Cousins (V-I) color index
62- 67 F6.3 mag Rmag [19.28/26.18] The Johnson-Cousins R band magnitude
69- 74 F6.3 mag NA-R [-1.85/1.37]? The Johnson-Cousins (NA656-R) color
index
76- 81 F6.3 mag R-I [-1.25/3.51] The Johnson-Cousins (R-I) color index
83- 87 F5.3 mag e_Rmag [0.004/0.87] The 1σ error in Rmag (2)
89- 93 F5.3 mag e_NA-R [0.006/1.63]? The 1σ error in NA-R (2)
95 I1 --- Nr [2/5] Number of R band observations
97 I1 --- NHa [2/5]? Number of NA656 band observations
99 I1 --- Type [0/2]? Classification (3)
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Note (1): In the USNO-B1.0 catalog system.
Note (2): Where the photometric uncertainty
σR,σNA-R=(σNA2+σR2)0.5.
Note (3): Classification as follows:
0 = star-like (20,936 occurrences);
1 = extended (5280 occurrences; Stonkute+ 2014, J/ApJS/214/19);
2 = bright (R<23mag) star-like, plotted in Figures 3-5 (2008 occurrences).
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History:
From electronic version of the journal
References:
Stonkute et al. Paper I. 2014ApJS..214...19S 2014ApJS..214...19S Cat. J/ApJS/214/19
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Aug-2022