! File: 1231C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:07:01:41 coverpage: title_1: THE RELATIONSHIP BETWEEN GALACTIC ACTIVITY AND GRAVITATIONAL title_2: INTERACTION: CYCLE 1 OBSERVATIONS sci_cat: QUASARS & AGN proposal_for: GTO/FOC pi_fname: CESARE pi_lname: BARBIERI pi_inst: PADOVA, UNIVERSITY OF pi_country: ITALY pi_phone: 49-661499 keywords_1: INTERACTING GALAXIES, ACTIVE GALAXIES, NUCLEI OF keywords_2: GALAXIES hours_pri: 3.60 num_pri: 2 pi_position: PROFESSOR OF ASTRONO ! end of coverpage abstract: line_1: It has long been known that activity in galaxies can be triggered by line_2: gravitational interaction. This hypothesis is supported by direct line_3: observations which show that a considerable excess of Seyfert galaxies and low line_4: redshift QSO's belongs to an interacting or disturbed system. A typical member line_5: of this class of objects is the S1 galaxy NGC6240, which is characterized by line_6: two close nuclei and is also an outstanding member of the new class of extreme line_7: IR galaxies identified by IRAS. High resolution imaging of the region between line_8: the two nuclei, using the FOC F/96 camera in combination with narrow band line_9: filters, centered on crucial lines and on the continuum, will provide line_10: information on the nature and on the effects of the collision between the two line_11: nuclei. line_13: We propose, in addition, to observe with the FOC, F/48 spectrograph the nucleus line_14: of the disturbed S1 galaxy Mkn 231, which belongs also to the IR class of line_15: objects identified by IRAS and is interpreted to be in a later evolutionary line_16: stage of the collisional phenomenon going on in NGC 6240. ! ! end of abstract general_form_proposers: lname: BONOLI fname: C. inst: PADOVA OBSERVATORY country: ITALY esa: X ! lname: DANESE fname: L. inst: PADOVA, UNIVERSITY OF country: ITALY esa: X ! lname: DE ZOTTI fname: G. inst: PADOVA, UNIVERSITY OF country: ITALY esa: X ! lname: RAFANELLI fname: PIERO inst: PADOVA OBSERVATORY country: ITALY esa: X ! lname: BARBIERI fname: CESARE inst: PADOVA, UNIVERSITY OF country: ITALY esa: X ! lname: SCHULZ fname: H. inst: RUHR UNIVERSITY BOCHUM country: GERMANY, WEST esa: X ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: ALL OBSERVATIONS TO BE DONE ON CYCLE 1 and 2. line_2: On the basis of the considerations collected in the previous section, both line_3: galaxies NGC 6240 and Mkn 231 are well suited for studying the relationship line_4: among gravitational interaction, star burst and Seyfert activity. In addition, line_5: they are the closest and apparently brightest objects showing an extreme high line_6: infrared excess. High resolution imaging with appropriate narrow band filters line_7: (encompassing, in turn HB + 0III (N1+N2), 0II 3727 and the nearby line_8: continua) will provide information on the morphology, on the space distribution line_9: of the ionized gas and on the nature of the excitation mechanism(s). line_11: Details on the exposure times, S/N ratios and photon fluxes from line_12: lines and continuum are quoted in Table 1. line_14: Long slit spectroscopy of NGC6240 is unfortunately not possible, since the line_15: object is too faint to be detected in reasonable exposure times; conversely, line_16: Mkn231 is much brighter and therefore we propose to perform long slit line_17: spectroscopic observations of it using the F/48, first order + F305LP + G450M, line_18: configuration. Details on the exposure times and S/N ratios are reported in line_19: Table 2. ! question: 4 section: 1 line_1: It is very important to observe with high spatial resolution the region line_2: between the two close (2 arcsec) nuclei of NGC 6240, in order to reveal, for line_3: example, the presence of eventual giant HII regions whose typical dimensions line_4: are 100 pc. To this aim it is necessary to get images with a resolution which line_5: cannot be reached from the ground where the best resolutions are 1.0 arcsec. line_6: The same spatial resolution will be reached performing long slit line_7: spectroscopy of Mkn 231. ! question: 6 section: 1 line_1: Dark time is required, since images with high signal to noise ratio are line_2: necessary for our purposes. ! question: 7 section: 1 line_1: No special software is required, beyond the usual commands implemented in line_2: MIDAS. After a first phase of data analysis and reduction at the ST Sci, the line_3: final processing will take place at the P.I. Institute. ! question: 10 section: 1 line_1: VAX 750 + MIDAS + Graphical Capabilities. line_2: No students ! question: 13 section: 1 line_1: Imaging of NGC 6240 and long slit spectroscopy of Mkn231, two intermediate line_2: Seyfert galaxies with strong infrared excess, can give a key to understand line_3: whether nuclear activity can be induced by gravitational interaction and line_4: whether blisters of star formation are present in the interacting region. ! !end of general form text general_form_address: lname: RAFANELLI fname: PIERO category: CON inst: OSSERVATORIO ASTRONOMICO addr_1: VICOLO OSSERVATORIO 5 addr_2: 35100 city: PADOVA country: ITALY phone: 49/661499 telex: 430176 UNPADU ! lname: BARBIERI fname: CESARE title: PROF. category: PI inst: ISTITUTO DI ASTRONOMIA addr_1: UNIVERSITA DI PADOVA addr_2: VICOLO OSSERVATORIO, 5 addr_3: 35100 city: PADOVA country: ITALY phone: 49/661499 telex: 430176 UNPADU ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC6240 descr_1: ACTIVE GALAXY WITH CLOSE INTERACTING descr_2: NUCLEI pos_1: RA = 16H 52M 58.915S +/- 0.02S, pos_2: DEC = +2D 24' 01.02" +/- 0.25" equinox: 2000 pm_or_par: N pos_epoch_bj: B pos_epoch_yr: 1980.00 rv_or_z: V=7340 acqpr_1: EXT plate_req: N plate_avail: N fluxnum_1: 1 fluxval_1: V=13.17 +/- 0.03, fluxval_2: E(B-V)=0.33 +/- 0.02 fluxnum_3: 3 fluxval_3: B=13.98+/- 0.03 fluxnum_4: 4 fluxval_4: U=14.17 +/- 0.03 fluxnum_5: 5 fluxval_5: SURF(V)=20.5 fluxnum_6: 6 fluxval_6: F-LINE(4861)=1.7 +/- 0.2E-14 fluxnum_7: 7 fluxval_7: F-CONT(4861)=1.4 +/- 0.3E-15 fluxnum_8: 8 fluxval_8: F-LINE(3727)=5.2 +/- 0.1E-14 fluxnum_9: 9 fluxval_9: F-CONT(3727)=0.4 +/- 0.2E-15 fluxnum_10: 10 fluxval_10: F-LINE(5007)=2.6 +/- 0.1E-14 ! targnum: 2 name_1: MKN231 descr_1: DISTURBED SEYFERT GALAXY pos_1: RA = 12H 56M 14.378S +/- 0.02S, pos_2: DEC = +56D 52' 25.20" +/- 0.25" equinox: ^ pm_or_par: ^ pos_epoch_bj: B pos_epoch_yr: 1983.40 rv_or_z: V=12300 acqpr_1: ^ plate_req: N plate_avail: N fluxnum_1: 1 fluxval_1: B=14.68 +/- 0.02 fluxnum_2: 2 fluxval_2: V=13.84 +/- 0.02 fluxnum_3: 3 fluxval_3: U=14.83 +/- 0.02 fluxnum_4: 4 fluxval_4: SURF(B)=20.3 +/- 0.1 fluxnum_5: 5 fluxval_5: F-CONT(3600)=5.5 +/- 0.2E-15 fluxnum_6: 6 fluxval_6: F-CONT(4800)=8.3 +/- 0.3E-15 fluxnum_7: 7 fluxval_7: F-CONT(5100)=12.9 +/- 0.2E-15 fluxnum_8: 8 fluxval_8: F-LINE(4861)=34.0 +/- 0.1E-14 fluxnum_9: 9 fluxval_9: F-LINE(4340)=11.0 +/- 0.2E-14 fluxnum_10: 10 fluxval_10: F-LINE(4101)=5.0 +/- 0.2 E-14 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 2.000 targname: NGC6240 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F372M wavelength: 3700 num_exp: 4 time_per_exp: 15M s_to_n: 8 fluxnum_1: 9 priority: 1 req_1: CYCLE 1; req_2: DARK TIME ! ! end of exposure logsheet ! No scan data records found