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J/ApJ/522/802   Cepheid calibration of SN 1989B in NGC 3627  (Saha+, 1999)

Cepheid calibration of the peak brightness of type Ia supernovae. IX. SN1989B in NGC 3627 Saha A., Sandage A., Tammann G.A., Labhardt L., Macchetto F.D., Panagia N. <Astrophys. J. 522, 802 (1999)> =1999ApJ...522..802S
ADC_Keywords: Photometry ; Stars, variable ; Supernovae Mission_Name: HST Keywords: Cepheids - distance scale - galaxies: individual (NGC 3627) - supernovae: individual (SN 1989B) Abstract: Repeated imaging observations have been made of NGC 3627 with the Hubble Space Telescope in 1997 - 1998 over an interval of 58 days. Images were obtained on 12 epochs in the F555W band and on five epochs in the F814W band. The galaxy hosted the prototypical, "Branch normal," type Ia supernova SN 1989B. A total of 83 variables have been found, of which 68 are definite Cepheid variables with periods ranging from 75 to 3.85 days. The dereddened distance modulus is determined to be (m-M)o=30.22±0.12 (internal uncertainty) using a subset of the Cepheid data whose reddening and error parameters are secure. Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 11 20 15.09 +12 59 29.4 NGC 3627 = M 66 = UGC 6346 --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 27 84 Positions of the variable stars on the chip table3.dat 34 1411 Photometry of the variable stars table4.dat 65 68 Cepheid characteristics
See also: II/189 : Magnitude Observations of Type I Supernovae (Cadonau+ 1990) J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Cepheid name 11- 15 F5.1 pix Xpix X pixel coordinate 21- 25 F5.1 pix Ypix Y pixel coordinate
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Cepheid name 9- 19 F11.4 d JD Julian Date of observation 22- 26 F5.2 mag Mag ? Observed magnitude 28- 31 F4.2 mag e_Mag ? Uncertainty in Mag 34 A1 --- f_Mag [VI] Indicates Mag is a V band (V) or an I band (I) observation
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Cepheid name 11- 14 F4.1 d Period Cepheid period 16- 20 F5.2 mag Vmag Mean V band magnitude 22- 25 F4.2 mag e_Vmag Uncertainty in Vmag 27- 31 F5.2 mag Imag Mean I band magnitude 33- 36 F4.2 mag e_Imag Uncertainty in Imag 38- 43 F6.3 mag (m-M)v Apparent V band distance moduli 45- 50 F6.3 mag (m-M)I Apparent I band distance moduli 52- 57 F6.3 mag m-M True apparent distance moduli 59- 63 F5.3 mag e_m-M Uncertainty in Ut 65 I1 --- q_Name [0,6] Quality index of the light-curve (1)
Note (1): The light-curve quality index ranges from 0 - 6. In this scheme, two points are given for the quality of the F555W light curves, two points for the evenness in phase coverage of the five F814W observation epochs, and three points for the amplitude and phase coherence of the F814W observations compared with the F555W light curve. Hence a quality index of 6 indicates the best possible light-curve quality. A quality index of 2 or less indicates near-fatal flaws such as apparent phase incoherence in the two passbands. This is generally the indication that object confusion by crowding and/or contamination by background is likely.
History: From the ApJ Electronic edition References: (Paper I) Sandage+ (1996ApJ...460L..15S) (Paper V) Saha+ (1996ApJ...466...55S) (Paper VI) Saha+ (1996ApJS..107..693S) (Paper VIII) Saha+ (1997ApJ...486....1S)
(End) Greg Schwarz [AAS] 10-Mar-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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