J/ApJS/183/109 Cepheids in 3 host galaxies (Riess+, 2009)
Cepheid calibrations of modern type Ia supernovae: implications for the Hubble
constant.
Riess A.G., Macri L., Li W., Lampeitl H., Casertano S., Ferguson H.C.,
Filippenko A.V., Jha S.W., Chornock R., Greenhill L., Mutchler M.,
Ganeshalingam M., Hicken M.
<Astrophys. J. Suppl. Ser., 183, 109-141 (2009)>
=2009ApJS..183..109R 2009ApJS..183..109R
ADC_Keywords: Photometry, HST ; Stars, variable ; Photometry, VRI
Keywords: cosmology: observations - distance scale -
galaxies: distances and redshifts - supernovae: general
Abstract:
This is the first of two papers reporting measurements from a program
to determine the Hubble constant to ∼5% precision from a refurbished
distance ladder. We present new observations of 110 Cepheid variables
in the host galaxies of two recent Type Ia supernovae (SNe Ia), NGC
1309 and NGC 3021, using the Advanced Camera for Surveys on the Hubble
Space Telescope (HST).
Description:
In Cycle 14 (2005-2006, GO-10497), we observed NGC 1309 and NGC 3021
for 12 epochs of 4800s each with ACS WFC F555W using a power-law
spacing of intervals designed to reduce period aliasing up to the full
monitoring duration of 52d. We also observed each host at five epochs
with F814W for 4800s each. In Cycle 15 (2006-2007, GO-10802), we
reobserved NGC 1309 and NGC 3021, as well as the other four hosts at
two epochs using ACS and F555W to constrain the phase of the Cepheid
light curves for subsequent infrared (IR) observations with the
Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). For the
four hosts with extensive ACS measurements, NGC 1309, NGC 3021,
NGC 3370, and NGC 4258, the data from programs GO-9810, GO-9351,
GO-10497, and GO-10802 were retrieved from the HST archive.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 84 31 Cepheid candidates in NGC 3021
table8.dat 84 79 Cepheid candidates in NGC 1309
table9.dat 84 127 Cepheid candidates in NGC 3370
table5.dat 65 806 Cepheid photometry in NGC 3021
table6.dat 65 2054 Cepheid photometry in NGC 1309
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See also:
J/ApJ/522/802 : Cepheid calibration of SN 1989B in NGC 3627 (Saha+, 1999)
J/ApJ/529/723 : VI photometry of Cepheids (Gibson+, 2000)
J/ApJ/627/579 : Photometry of variables in NGC 3370 (Riess+, 2005)
Byte-by-byte Description of file: table7.dat table8.dat table9.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [RML2009] Cepheid candidate identification number (G1)
7- 15 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
17- 25 F9.5 deg DEdeg Declination in decimal degrees (J2000)
27- 31 F5.2 d Per Period
33- 38 F6.3 mag Vmag V-band mean magnitude
40- 44 F5.3 mag e_Vmag Uncertainty in Vmag
46- 51 F6.3 mag Imag I-band mean magnitude
53- 57 F5.3 mag e_Imag Uncertainty in Imag
59- 63 F5.3 mag Vamp V-band amplitude
65- 69 F5.3 mag Iamp I-band amplitude
71- 75 F5.3 --- LV V-band variability index
77- 84 F8.2 d T0 Epoch (2400000+)
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Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [RML2009] Identification number (G1)
7- 11 F5.2 d Per Period
13- 24 F12.4 --- MJDV Epoch of mid-observation for V-band
26- 31 F6.3 mag F555W ? The F555W band magnitude
33- 37 F5.3 mag e_F555W ? The 1σ uncertainty in F555W
38 A1 --- f_F555W [*] Data point rejected in light curve fit
40- 51 F12.4 --- MJDI ? Epoch of mid-observation for I-band
53- 58 F6.3 mag F814W ? The F814W band magnitude
60- 64 F5.3 mag e_F814W ? The 1σ uncertainty in F814W
65 A1 --- f_F814W [*] Data point rejected in light curve fit
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Global Notes:
Note (G1): <[RML2009] NGC NNNN NNNNN> in Simbad.
History:
From electronic version of the journal
Reference:
Riess et al. A redetermination of the Hubble constant with the Hubble
Space Telescope from a differential distance ladder (2009ApJ...699..539R 2009ApJ...699..539R)
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Mar-2010