J/ApJ/936/117 H-alpha KPNO photometry of M31 novae (Rector+, 2022)
The Rate and Spatial Distribution of Novae in M31 as Determined by a 20 Year
Survey.
Rector T.A., Shafter A.W., Burris W.A., Walentosky M.J., Viafore K.D.,
Strom A.L., Cool R.J., Sola N.A., Crayton H., Pilachowski C.A.,
Jacoby G.H., Corbett D.L., Rene M., Hernandez D.
<Astrophys. J., 936, 117 (2022)>
=2022ApJ...936..117R 2022ApJ...936..117R
ADC_Keywords: Galaxies; Stars, variable; Novae; Photometry, H-alpha
Keywords: Classical novae ; Cataclysmic variable stars ; Galaxies ; Novae ;
Time domain astronomy
Abstract:
A long-term (1995-2016) survey for novae in the nearby Andromeda
galaxy (M31) was conducted as part of the Research-Based Science
Education initiative. During the course of the survey 180 nights of
observation were completed at Kitt Peak, Arizona. A total of 262 novae
were either discovered or confirmed, 40 of which have not been
previously reported. Of these, 203 novae form a spatially complete
sample detected by the KPNO/WIYN 0.9m telescope within a 20x20' field
centered on the nucleus of M31. An additional 50 novae are part of a
spatially complete sample detected by the KPNO 4m telescope within a
larger 36x36' field. Consistent with previous studies, it is found
that the spatial distribution of novae in both surveys follows the
bulge light of M31 somewhat more closely than the overall background
light of the galaxy. After correcting for the limiting magnitude and
the spatial and temporal coverage of the surveys, a final nova rate in
M31 is found to be R=40-4+5/yr, which is considerably lower than
recent estimates. When normalized to the K-band luminosity of M31,
this value yields a luminosity-specific nova rate,
νK=3.3±0.4/yr [1010L_☉,K]-1. By scaling the M31 nova
rate using the relative infrared luminosities of M31 and our Galaxy, a
nova rate of RG=28-4+5/yr is found for the Milky Way.
Description:
All but 15 of the 180 epochs were observed with the KPNO/WIYN 0.9m
telescope. Supplemental observations were obtained with the KPNO
Mayall 4m telescope, the KPNO 2.1m telescope, the Bok 90inch telescope
at Steward Observatory, and the McGraw-Hill 1.3m telescope at the MDM
Observatory. Observations from the Local Group Survey (LGS) were also
used.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
00 42 44.33 +41 16 07.5 M31 = 2C 56
-----------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 36 182 List of observations
table3.dat 50 262 Locations of new novae
table4.dat 29 1937 Photometry for all novae
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See also:
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)
J/AJ/134/2474 : Hα emission-line * in 7 dwarfs galaxies (Massey+, 2007)
J/ApJ/734/12 : Survey of novae in M31 (Shafter+, 2011)
J/ApJS/227/1 : HST survey for novae in M87. I. VI LCs (Shara+, 2016)
J/ApJ/834/196 : Galactic novae with m≤10 from 1900 to 2015 (Shafter, 2017)
J/ApJ/912/19 : Follow-up phot. & sp. of 12 PGIR novae (De+, 2021)
J/ApJ/923/239 : An R-band survey of novae in M83 (Shafter+, 2021)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 yr Obs.Y [1995/2016] Year of the observation
6- 7 I2 "month" Obs.M Month of the observation
9- 10 I2 d Obs.D Day of the observation
12- 19 F8.2 d MJD [49963/57684] Modified Julian Date
21- 32 A12 --- Tel/Det Telescope/Detector identifiers
34- 36 F3.1 arcsec Seeing [0.7/3.2] Seeing
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Nova name; M31N+
9 A1 --- f_Name [*] Flag on Name (1)
11- 12 I2 h RAh [0] Hour of Right Ascension J2000 (J2000)
14- 15 I2 min RAm [41/44] Minute of Right Ascension J2000 (J2000)
17- 21 F5.2 s RAs Second of Right Ascension J2000 (J2000)
23 A1 --- DE- [+] Sign of declination (J2000)
25- 26 I2 deg DEd [40/41] Degree of Declination J2000 (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination J2000 (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of Declination J2000 (J2000)
36- 42 F7.1 arcsec oRA [-1221/1683] RA offset from nucleus of M31
44- 50 F7.1 arcsec oDE [-1175/1226] Dec offset from nucleus of M31
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Note (1): Flag as follows:
* = A newly reported novae.
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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- 8 A8 --- Name Name of nova; M31N+
10- 17 F8.2 d MJD [49963/57684] Date of mid-point of observation
19 A1 --- l_Hamag Upper limit flag on Hamag
20- 24 F5.2 mag Hamag [14.5/28.8] Apparent H-alpha AB magnitude (1)
26- 29 F4.2 mag e_Hamag [0.03/3]? Uncertainty in Hamag
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Note (1): The Hα magnitude is defined on the AB system where
Hamag=0 for fλ=2.53e-9ergs/cm2/s/A.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 24-Jun-2024