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J/A+A/607/A72       Absolute Refletivity of Jupiter and Saturn  (Mendikoa+ 2017)

Temporal and spatial variations of the absolute reflectivity of Jupiter and Saturn from 0.38 to 1.7 mum with PlanetCam-UPV/EHU. Mendikoa I., Sanchez-Lavega A., Perez-Hoyos S., Hueso R., Rojas J.F., Lopez-Santiago J. <Astron. Astrophys. 607, A72 (2017)> =2017A&A...607A..72M (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Planets ; Photometry Keywords: planets and satellites: gaseous planets - techniques: photometric - planetary systems Abstract: We provide measurements of the absolute reflectivity of Jupiter and Saturn along their central meridians in filters covering a wide range of visible and near-infrared wavelengths (from 0.38 to 1.7um) that are not often presented in the literature. We also give measurements of the geometric albedo of both planets and discuss the limb-darkening behavior and temporal variability of their reflectivity values for a period of four years (2012-2016). This work is based on observations with the PlanetCam-UPV/EHU instrument at the 1.23m and 2.2m telescopes in Calar Alto Observatory (Spain). The instrument simultaneously observes in two channels: visible (VIS; 0.38-1.0um) and short-wave infrared (SWIR; 1.0-1.7um). We obtained high-resolution observations via the lucky-imaging method. We show that our calibration is consistent with previous independent determinations of reflectivity values of these planets and, for future reference, provide new data extended in the wavelength range and in the time. Our results have an uncertainty in absolute calibration of 10-20%. We show that under the hypothesis of constant geometric albedo, we are able to detect absolute reflectivity changes related to planetary temporal evolution of about 5-10%. Description: Overall mean absolute reflectivity I/F of Jupiter and Saturn. Scans at central meridian are given versus latitude from observations at Calar Alto observatory between 2012 and 2016. In addition, Minnaert coefficients (I/F)0 and k are given, determining the I/F variation with the cosines of the incidence and emission angles, where (I/F)0 represents the absolute reflectivity in absence of darkening effects at nadir viewing and k is the limb-darkening coefficient. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 79 161 I/F vs. Lat (Jupiter-VIS) tablea2.dat 79 161 I/F vs. Lat (Jupiter-SWIR) tablea3.dat 77 81 I/F vs. Lat (Saturn-VIS) tablea4.dat 77 81 I/F vs. Lat (Saturn-SWIR) tableb1.dat 73 148 Minnaert coefficient (I/F)0 (Jupiter-VIS) tableb2.dat 73 148 Minnaert coefficient k (Jupiter-VIS) tableb3.dat 61 145 Minnaert coefficient (I/F)0 (Jupiter-SWIR) tableb4.dat 61 145 Minnaert coefficient k (Jupiter-SWIR) tableb5.dat 71 81 Minnaert coefficient (I/F)0 (Saturn-VIS) tableb6.dat 71 81 Minnaert coefficient k (Saturn-VIS) tableb7.dat 47 81 Minnaert coefficient (I/F)0 (Saturn-SWIR) tableb8.dat 47 81 Minnaert coefficient k (Saturn-SWIR)
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- I/F-Jup-UV Absolute Reflectivity (Jupiter,UV) 14- 18 F5.3 --- I/F-Jup-Vio Absolute Reflectivity (Jupiter,Vio) 20- 24 F5.3 --- I/F-Jup-B Absolute Reflectivity (Jupiter,B) 26- 30 F5.3 --- I/F-Jup-V Absolute Reflectivity (Jupiter,V) 32- 36 F5.3 --- I/F-Jup-R Absolute Reflectivity (Jupiter,R) 38- 42 F5.3 --- I/F-Jup-M1 Absolute Reflectivity (Jupiter,M1) 44- 48 F5.3 --- I/F-Jup-C1 Absolute Reflectivity (Jupiter,C1) 50- 54 F5.3 --- I/F-Jup-M2 Absolute Reflectivity (Jupiter,M2) 56- 60 F5.3 --- I/F-Jup-C2 Absolute Reflectivity (Jupiter,C2) 62- 66 F5.3 --- I/F-Jup-M3 Absolute Reflectivity (Jupiter,M3) 68- 72 F5.3 --- I/F-Jup-C3 Absolute Reflectivity (Jupiter,C3) 74- 79 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- I/F-Jup-J Absolute Reflectivity (Jupiter,J) 14- 18 F5.3 --- I/F-Jup-H Absolute Reflectivity (Jupiter,H) 20- 24 F5.3 --- I/F-Jup-YC Absolute Reflectivity (Jupiter,YC) 26- 30 F5.3 --- I/F-Jup-YM Absolute Reflectivity (Jupiter,YM) 32- 36 F5.3 --- I/F-Jup-V1 Absolute Reflectivity (Jupiter,V1) 38- 42 F5.3 --- I/F-Jup-V2 Absolute Reflectivity (Jupiter,V2) 44- 48 F5.3 --- I/F-Jup-JC Absolute Reflectivity (Jupiter,JC) 50- 54 F5.3 --- I/F-Jup-JM Absolute Reflectivity (Jupiter,JM) 56- 60 F5.3 --- I/F-Jup-V3 Absolute Reflectivity (Jupiter,V3) 62- 66 F5.3 --- I/F-Jup-HC Absolute Reflectivity (Jupiter,HC) 68- 72 F5.3 --- I/F-Jup-HM Absolute Reflectivity (Jupiter,HM) 74- 79 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- I/F-Sat-UV Absolute Reflectivity (Saturn,UV) 13- 17 F5.3 --- I/F-Sat-Vio Absolute Reflectivity (Saturn,Vio) 19- 23 F5.3 --- I/F-Sat-B Absolute Reflectivity (Saturn,B) 25- 29 F5.3 --- I/F-Sat-V Absolute Reflectivity (Saturn,V) 31- 35 F5.3 --- I/F-Sat-R Absolute Reflectivity (Saturn,R) 37- 41 F5.3 --- I/F-Sat-M1 Absolute Reflectivity (Saturn,M1) 43- 47 F5.3 --- I/F-Sat-C1 Absolute Reflectivity (Saturn,C1) 49- 53 F5.3 --- I/F-Sat-M2 Absolute Reflectivity (Saturn,M2) 55- 59 F5.3 --- I/F-Sat-C2 Absolute Reflectivity (Saturn,C2) 61- 65 F5.3 --- I/F-Sat-M3 Absolute Reflectivity (Saturn,M3) 67- 71 F5.3 --- I/F-Sat-C3 Absolute Reflectivity (Saturn,C3) 73- 77 F5.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tablea4.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- I/F-Sat-J Absolute Reflectivity (Saturn,J) 13- 17 F5.3 --- I/F-Sat-H Absolute Reflectivity (Saturn,H) 19- 23 F5.3 --- I/F-Sat-YC Absolute Reflectivity (Saturn,YC) 25- 29 F5.3 --- I/F-Sat-YM Absolute Reflectivity (Saturn,YM) 31- 35 F5.3 --- I/F-Sat-V1 Absolute Reflectivity (Saturn,V1) 37- 41 F5.3 --- I/F-Sat-V2 Absolute Reflectivity (Saturn,V2) 43- 47 F5.3 --- I/F-Sat-JC Absolute Reflectivity (Saturn,JC) 49- 53 F5.3 --- I/F-Sat-JM Absolute Reflectivity (Saturn,JM) 55- 59 F5.3 --- I/F-Sat-V3 Absolute Reflectivity (Saturn,V3) 61- 65 F5.3 --- I/F-Sat-HC Absolute Reflectivity (Saturn,HC) 67- 71 F5.3 --- I/F-Sat-HM Absolute Reflectivity (Saturn,HM) 73- 77 F5.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- (I/F)0-Jup-UV Minnaert Coefficient (I/F)0 (Jupiter,UV) 14- 18 F5.3 --- (I/F)0-Jup-Vio Minnaert Coefficient (I/F)0 (Jupiter,Vio) 20- 24 F5.3 --- (I/F)0-Jup-B Minnaert Coefficient (I/F)0 (Jupiter,B) 26- 30 F5.3 --- (I/F)0-Jup-V Minnaert Coefficient (I/F)0 (Jupiter,V) 32- 36 F5.3 --- (I/F)0-Jup-M1 Minnaert Coefficient (I/F)0 (Jupiter,M1) 38- 42 F5.3 --- (I/F)0-Jup-C1 Minnaert Coefficient (I/F)0 (Jupiter,C1) 44- 48 F5.3 --- (I/F)0-Jup-M2 Minnaert Coefficient (I/F)0 (Jupiter,M2) 50- 54 F5.3 --- (I/F)0-Jup-C2 Minnaert Coefficient (I/F)0 (Jupiter,C2) 56- 60 F5.3 --- (I/F)0-Jup-M3 Minnaert Coefficient (I/F)0 (Jupiter,M3) 62- 66 F5.3 --- (I/F)0-Jup-C3 Minnaert Coefficient (I/F)0 (Jupiter,C3) 68- 73 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb2.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- k-Jup-UV Minnaert Coefficient k (Jupiter,UV) 14- 18 F5.3 --- k-Jup-Vio Minnaert Coefficient k (Jupiter,Vio) 20- 24 F5.3 --- k-Jup-B Minnaert Coefficient k (Jupiter,B) 26- 30 F5.3 --- k-Jup-V Minnaert Coefficient k (Jupiter,V) 32- 36 F5.3 --- k-Jup-M1 Minnaert Coefficient k (Jupiter,M1) 38- 42 F5.3 --- k-Jup-C1 Minnaert Coefficient k (Jupiter,C1) 44- 48 F5.3 --- k-Jup-M2 Minnaert Coefficient k (Jupiter,M2) 50- 54 F5.3 --- k-Jup-C2 Minnaert Coefficient k (Jupiter,C2) 56- 60 F5.3 --- k-Jup-M3 Minnaert Coefficient k (Jupiter,M3) 62- 66 F5.3 --- k-Jup-C3 Minnaert Coefficient k (Jupiter,C3) 68- 73 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb3.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- (I/F)0-Jup-YC Minnaert Coefficient (I/F)0 (Jupiter,YC) 14- 18 F5.3 --- (I/F)0-Jup-YM Minnaert Coefficient (I/F)0 (Jupiter,YM) 20- 24 F5.3 --- (I/F)0-Jup-V1 Minnaert Coefficient (I/F)0 (Jupiter,V1) 26- 30 F5.3 --- (I/F)0-Jup-V2 Minnaert Coefficient (I/F)0 (Jupiter,V2) 32- 36 F5.3 --- (I/F)0-Jup-JC Minnaert Coefficient (I/F)0 (Jupiter,JC) 38- 42 F5.3 --- (I/F)0-Jup-V3 Minnaert Coefficient (I/F)0 (Jupiter,V3) 44- 48 F5.3 --- (I/F)0-Jup-HC Minnaert Coefficient (I/F)0 (Jupiter,HC) 50- 54 F5.3 --- (I/F)0-Jup-HM Minnaert Coefficient (I/F)0 (Jupiter,HM) 56- 61 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb4.dat
Bytes Format Units Label Explanations
1- 6 F6.2 deg LatPC Planetocentric Latitude 8- 12 F5.3 --- k-Jup-YC Minnaert Coefficient k (Jupiter,YC) 14- 18 F5.3 --- k-Jup-YM Minnaert Coefficient k (Jupiter,YM) 20- 24 F5.3 --- k-Jup-V1 Minnaert Coefficient k (Jupiter,V1) 26- 30 F5.3 --- k-Jup-V2 Minnaert Coefficient k (Jupiter,V2) 32- 36 F5.3 --- k-Jup-JC Minnaert Coefficient k (Jupiter,JC) 38- 42 F5.3 --- k-Jup-V3 Minnaert Coefficient k (Jupiter,V3) 44- 48 F5.3 --- k-Jup-HC Minnaert Coefficient k (Jupiter,HC) 50- 54 F5.3 --- k-Jup-HM Minnaert Coefficient k (Jupiter,HM) 56- 61 F6.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb5.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- (I/F)0SatUV Minnaert Coefficient (I/F)0 (Saturn,UV) 13- 17 F5.3 --- (I/F)0SatVio Minnaert Coefficient (I/F)0 (Saturn,Vio) 19- 23 F5.3 --- (I/F)0SatB Minnaert Coefficient (I/F)0 (Saturn,B) 25- 29 F5.3 --- (I/F)0SatV Minnaert Coefficient (I/F)0 (Saturn,V) 31- 35 F5.3 --- (I/F)0SatM1 Minnaert Coefficient (I/F)0 (Saturn,M1) 37- 41 F5.3 --- (I/F)0SatC1 Minnaert Coefficient (I/F)0 (Saturn,C1) 43- 47 F5.3 --- (I/F)0SatM2 Minnaert Coefficient (I/F)0 (Saturn,M2) 49- 53 F5.3 --- (I/F)0SatC2 Minnaert Coefficient (I/F)0 (Saturn,C2) 55- 59 F5.3 --- (I/F)0SatM3 Minnaert Coefficient (I/F)0 (Saturn,M3) 61- 65 F5.3 --- (I/F)0SatC3 Minnaert Coefficient (I/F)0 (Saturn,C3) 67- 71 F5.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb6.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- k-Sat-UV Minnaert Coefficient k (Saturn,UV) 13- 17 F5.3 --- k-Sat-Vio Minnaert Coefficient k (Saturn,Vio) 19- 23 F5.3 --- k-Sat-B Minnaert Coefficient k (Saturn,B) 25- 29 F5.3 --- k-Sat-V Minnaert Coefficient k (Saturn,V) 31- 35 F5.3 --- k-Sat-M1 Minnaert Coefficient k (Saturn,M1) 37- 41 F5.3 --- k-Sat-C1 Minnaert Coefficient k (Saturn,C1) 43- 47 F5.3 --- k-Sat-M2 Minnaert Coefficient k (Saturn,M2) 49- 53 F5.3 --- k-Sat-C2 Minnaert Coefficient k (Saturn,C2) 55- 59 F5.3 --- k-Sat-M3 Minnaert Coefficient k (Saturn,M3) 61- 65 F5.3 --- k-Sat-C3 Minnaert Coefficient k (Saturn,C3) 67- 71 F5.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb7.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- (I/F)0-Sat-YC Minnaert Coefficient (I/F)0 (Saturn,YC) 13- 17 F5.3 --- (I/F)0-Sat-YM Minnaert Coefficient (I/F)0 (Saturn,YM) 19- 23 F5.3 --- (I/F)0-Sat-V1 Minnaert Coefficient (I/F)0 (Saturn,V1) 25- 29 F5.3 --- (I/F)0-Sat-V2 Minnaert Coefficient (I/F)0 (Saturn,V2) 31- 35 F5.3 --- (I/F)0-Sat-JC Minnaert Coefficient (I/F)0 (Saturn,JC) 37- 41 F5.3 --- (I/F)0-Sat-HC Minnaert Coefficient (I/F)0 (Saturn,HC) 43- 47 F5.2 deg LatPG Planetographic Latitude
Byte-by-byte Description of file: tableb8.dat
Bytes Format Units Label Explanations
1- 5 F5.2 deg LatPC Planetocentric Latitude 7- 11 F5.3 --- k-Sat-YC Minnaert Coefficient k (Saturn,YC) 13- 17 F5.3 --- k-Sat-YM Minnaert Coefficient k (Saturn,YM) 19- 23 F5.3 --- k-Sat-V1 Minnaert Coefficient k (Saturn,V1) 25- 29 F5.3 --- k-Sat-V2 Minnaert Coefficient k (Saturn,V2) 31- 35 F5.3 --- k-Sat-JC Minnaert Coefficient k (Saturn,JC) 37- 41 F5.3 --- k-Sat-HC Minnaert Coefficient k (Saturn,HC) 43- 47 F5.2 deg LatPG Planetographic Latitude
Acknowledgements: Inigo Mendikoa, imendikoa(at)gmail.com
(End) I. Mendikoa [Univ. Pais Vasco UPV/EHU], P. Vannier [CDS] 17-Aug-2017
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