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J/A+A/601/A32          10 SALT spectra of HE 0435-4312       (Sredzinska+, 2017)

SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line. Sredzinska J., Czerny B., Hryniewicz K., Krupa M., Kurcz A., Marziani P., Adhikari T.P., Basak R., You B., Wang J.M., Hu C., Pych W., Bilicki M. <Astron. Astrophys. 601, A32 (2017)> =2017A&A...601A..32S (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Galaxies, optical ; Spectroscopy Keywords: accretion, accretion disks - black hole physics, emission line, quasar - individual: HE 0435-4312 Abstract: The MgII emission line is visible in the optical band for intermediate redshift quasars (0.4<z<1.6) and it is thus an extremely important tool to measure the black hole mass and to understand the structure of the Broad Line Region. We aim to determine the substructure and the variability of the MgII line with the aim to identify which part of the line comes from a medium in Keplerian motion. Using the Southern African Large Telescope (SALT) with the Robert Stobie Spectrograph (RSS) we performed ten spectroscopic observations of quasar HE 0435-4312 (z=1.2231) over a period of three years (Dec 23/24, 2012 to Dec 7/8, 2015). Both the MgII line and the FeII pseudo-continuum increase with time. We clearly detect the systematic shift of the MgII line with respect to the FeII over the years, corresponding to the acceleration of 104±14km/s/year in the quasar rest frame. The MgII line shape is clearly non-Gaussian but single-component, and the increase in line equivalent width and line shift is not accompanied with significant evolution of the line shape. We analyse the conditions in the MgII and FeII formation region and we note that the very large difference in the covering factor and the turbulent velocity also support the conclusion that the two regions are spatially separated. The measured acceleration of the line systematic shift is too large to connect it with the orbital motion at a distance of the Broad Line Region (BLR) in this source. It may imply a precessing inner disk illuminating the BLR. Further monitoring is still needed to better constrain the variability mechanism. Description: Ten spectra of the quasar HE 0435-4312 taken at different dates with SALT telescope. Spectra are in the rest frame, corrected for the Galaxy extinction. The ten spectra are taken on 23 Dec 2012, 18 Feb 2013, 20 Aug 2013, 3 Feb 2014, 23 Aug 2014, 24 Nov 2014, 9 Jan 2015, 9 Aug 2015, 6 Oct 2015, 7 Dec 2015. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 04 37 11.78 -43 06 04.3 HE 0435-4312 = HE 0435-4312 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 90 10 Log of spectroscopic observations with SALT he0435.dat 47 13 HE 0435-4312 broad band spectrum obs01.dat 29 1013 HE 0435-4312 spectrum, 23 Dec 2012 obs02.dat 29 1004 HE 0435-4312 spectrum, 18 Feb 2013 obs03.dat 29 1024 HE 0435-4312 spectrum, 20 Aug 2013 obs04.dat 29 1015 HE 0435-4312 spectrum, 03 Feb 2014 obs05.dat 29 1008 HE 0435-4312 spectrum, 23 Aug 2014 obs06.dat 29 1027 HE 0435-4312 spectrum, 24 Nov 2014 obs07.dat 29 1021 HE 0435-4312 spectrum, 09 Jan 2015 obs08.dat 29 1012 HE 0435-4312 spectrum, 09 Aug 2015 obs09.dat 29 1021 HE 0435-4312 spectrum, 06 Oct 2015 obs10.dat 29 1016 HE 0435-4312 spectrum, 07 Dec 2015
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- No Observation number 4- 14 A11 "date" Obs.Date Observation date 16- 22 F7.2 d MJD Modified Julian date of observation 24- 35 A12 s ExpTime Exposure time(s) 37- 43 A7 arcsec Seeing Seeing 45- 80 A36 --- Com Comments 82- 90 A9 --- FileName Name of the file with spectrum
Byte-by-byte Description of file: he0435.dat
Bytes Format Units Label Explanations
1- 15 E15.10 [Hz] lognu Rest frame (z=1.2231) 17- 31 E15.10 [mW/m2] lognuLnu Rest-frame luminosity νLν 33- 47 E15.10 [mW/m2] e_lognuLnu rms uncertainty on lognuLnu
Byte-by-byte Description of file: obs*.dat
Bytes Format Units Label Explanations
2- 9 F8.3 0.1nm lambda Observed frame (Wavelength) 12- 19 F8.3 ct/s Fobs Observation flux 21- 29 F9.3 ct/s Fbckg Background flux
Acknowledgements: Justyna Sredzinska, bcz(at)cft.edu.pl
(End) Patricia Vannier [CDS] 24-Apr-2017
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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