J/MNRAS/426/1767 Gaia spectrophotometric standard stars I. (Pancino+, 2012)
The Gaia spectrophotometric standard stars survey. I. Preliminary results.
Pancino E., Altavilla G., Marinoni S., Cocozza G., Carrasco J.M.,
Bellazzini M., Bragaglia A., Federici L., Rossetti E., Cacciari C.,
Balaguer Nunez L., Castro A., Figueras F., Fusi Pecci F., Galleti S.,
Gebran M., Jordi C., Lardo C., Masana E., Monguio M., Montegriffo P.,
Ragaini S., Schuster W., Trager S., Vilardell F., Voss H.
<Mon. Not. R. Astron. Soc., 426, 1767-1781 (2012)>
=2012MNRAS.426.1767P 2012MNRAS.426.1767P
ADC_Keywords: Surveys ; Stars, standard ; Magnitudes
Keywords: techniques: photometric - techniques: spectroscopic - catalogues -
stars: variables: δ Scuti
Abstract:
We describe two ground-based observing campaigns aimed at building a
grid of approximately 200 spectrophotometric standard stars (SPSS),
with an internal ≃1% precision and tied to Vega within ≃3%, for the
absolute flux calibration of data gathered by Gaia, the European Space
Agency (ESA) astrometric mission. The criteria for the selection and a
list of candidates are presented, together with a description of the
survey strategy and the adopted data analysis methods. We also discuss
a short list of notable rejected SPSS candidates and difficult cases,
based on identification problems, literature discordant data, visual
companions and variability. In fact, all candidates are also monitored
for constancy (within ±5mmag, approximately). In particular, we
report on a CALSPEC standard, 1740346, that we found to be a δ
Scuti variable during our short-term monitoring (1-2h) campaign.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 68 46 Primary spectrophotometric standard candidates
table3.dat 137 9 Notable rejected standard candidates
table4.dat 69 164 Secondary spectrophotometric standard candidates
notes.dat 186 58 Notes
refs.dat 158 38 References
--------------------------------------------------------------------------------
See also:
J/MNRAS/462/3616 : SPSS III. (Marinoni+, 2016)
J/MNRAS/462/3616 : SPSS V. (Pancino+, 2021)
Byte-by-byte Description of file: table2.dat table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Group [WOC] Group: White dwarf, hot or cool star (1)
3- 16 A14 --- Star Star name
17 A1 --- f_Star [y*] Identification problems (2)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 42 F5.2 arcsec DEs Declination (J2000)
43- 44 A2 --- r_Star Reference for position, in refs.dat file
46- 50 F5.2 mag Bmag ?=- B magnitude
51- 52 A2 --- r_Bmag Reference for Bmag, in refs.dat file
54- 58 F5.2 mag Vmag ?=- V magnitude
59- 60 A2 --- r_Vmag Reference for Vmag, in refs.dat file
62- 66 A5 --- SpType Mk spectral type
67- 68 A2 --- r_SpType Reference for SpType, in refs.dat file
70-137 A68 --- Note Reason of rejection for table3 stars
--------------------------------------------------------------------------------
Note (1): Groups as follows:
W = White dwarfs and hot subdwarfs
O = Other hot stars (O, B and A)
C = Cooler stars (F, G and K)
Note (2): Notes as follows:
y = this star was wrongly identified by Hamuy et al. 1992 (II/179)
as LTT 377. The case is discussed in detail in Section
'Identification and literature problems'.
* = 1743045 for 2MASS J17430448+6655015
* = 1805292 for 2MASS J18052927+6427520
* = 1812095 for 2MASS J18120957+6329423
* = 1740346 for 2MASS J17403468+6527148
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Star Star name
14 A1 --- f_Star [*i] Identification problems (1)
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 26 F5.2 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 39 F5.2 arcsec DEs Declination (J2000)
41- 42 I2 --- n_Star Note and reference for position, in notes.dat file
44- 48 F5.2 mag Bmag ?=- B magnitude
50- 51 I2 --- n_Bmag ? Note and reference for Bmag, in notes.dat file
53- 57 F5.2 mag Vmag ?=- V magnitude
59- 60 I2 --- n_Vmag Note and reference for Vmag, in notes.dat file
62- 66 A5 --- SpType MK spectral type
68- 69 I2 --- n_SpType ? Note and reference for SpType, in notes.dat file
--------------------------------------------------------------------------------
Note (1): Notes as follows:
i = 2MASS J175713 for 2MASS J17571324+6703409
* = possible identification problem, see also Section
'Identification and literature problems'
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 48 A25 --- Aut Author's name
50-158 A109 --- Com Comments
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Note Note code
4-186 A183 --- Text Text of the note
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Altavilla et al., Paper II 2015AN....336..515A 2015AN....336..515A
Marinoni et al., Paper III 2016MNRAS.462.3616M 2016MNRAS.462.3616M, Cat. J/MNRAS/462/3616
Altavilla et al., Paper IV 2021MNRAS.501.2848A 2021MNRAS.501.2848A
Pancino et al., Paper V 2021MNRAS.503.3660P 2021MNRAS.503.3660P, Cat. J/MNRAS/503/3660
(End) Patricia Vannier [CDS] 14-Oct-2013