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2. OBSERVATIONS AND DATA REDUCTION

2.1. Halpha observations

The edge-on spiral galaxies, which form the basis of this Halpha survey, have been observed in five individual observing runs between 1999 and 2000. The northern hemisphere objects (Runs NH-1, NH-2) have been observed with the CAHA 1 2.2m telescope at the Calar Alto Observatory in southern Spain, and the southern hemisphere objects (Runs SH-1, SH-2, SH-3) have been observed with the Danish 1.54m telescope at the European Southern Observatory at La Silla/Chile (see Table 1 for a summary of the individual observing runs). Six additional targets, that were selected on the basis of our selection criteria, have also been included into this survey. These were galaxies, already observed several years ago in past observing runs, or that were at our disposal, so we did not have to re-observe them (Runs SH-a, SH-b, SH-c). The basic galaxy properties, including the coordinates, galaxy types, distances, radial velocities, sizes, inclinations, and magnitudes, are listed in Table 2.

Table 1. Individual observing runs for the new Halpha survey

Run No. Dates Telescope

NH-1 19-22/02/1999 CAHA2.2
NH-2 08-13/08/1999 CAHA2.2
SH-1 07-10/07/1999 DAN1.54
SH-2 09-13/11/1999 DAN1.54
SH-3 29/07-01/08/2000 DAN1.54
SH-a 22/02/1993 ESO2.2
SH-b 07-08/05/1991 NTT
SH-c 10/02/1995 NTT

Table 2. Basic galaxy parameters

Galaxya alt. name R.A. (J2000) Dec. (J2000) Type D[Mpc] vHI [km s-1] a×b i mBb

NGC24 ESO472-16 00h09m56.6s -24°57'53" Sc 6.8 554 5.8'×1.3' 77° 12.07
NGC100 FGC0042 00h24m02.6s +16°29'09" Sc 11.2 842 5.7'×0.6' 84° 14.00
UGC260 FGC0046 00h27m02.9s +11°35'03" Sc 28.5 2135 2.7'×0.4' 81° 13.71
ESO540-16 FGC0082 00h42m14.9s -18°09'40" SBcd 20.7 1555 2.7'×0.3' 84° 14.32
MCG-2-3-16 FGC0090 00h47m46.7s -09°53'54" SBc 17.9 1345 3.0'×0.4' 82° - - - -
NGC360 ESO79-14 01h02m51.2s -65°36'34" Sc 30.7 2302 3.5'×0.4' 83° 13.40
NGC669 UGC01248 01h47m16.1s +35°33'48" Sab 62.4 4677 3.1'×0.6' 79° 12.97
UGC1281 FGC0195 01h49m32.4s +32°35'32" Sc  4.6  157 4.5'×0.8' 80° 12.87
NGC891 UGC01831 02h22m33.1s +42°20'48" Sb 9.5 528 14.0'×3.0' 88° 10.84
UGC2082 FGC0317 02h36m16.3s +25°25'29" Sc 9.4 707 5.4'×0.8' 81° 13.56
IC1862 ESO356-15 02h51m57.6s -33°20'31" Sbc 85.3 6400 2.8'×0.3' 84° 14.45
NGC1247 FGC0396 03h12m13.0s -10°28'58" Sab 52.6 3945 3.4'×0.5' 82° 13.47
ESO117-19 PGC14337 04h02m32.5s -62°18'53" SBbc 71.1 5335 2.0'×0.3' 81° 14.58
IC2058 ESO157-18 04h17m54.5s -55°55'57" Sc 18.2 1368 3.1'×0.4' 83° 13.87
ESO362-11 PGC017027 05h16m39.0s -37°06'00" Sbc 17.9 1346 4.7'×0.8' 80° 13.04
ESO121-6 FGCE0562 06h07m29.2s -61°48'25" Sc 16.2 1211 3.9'×0.7' 80° 13.43
NGC2188 ESO364-37 06h10m09.5s -34°06'22" SBcd 7.9 749 4.8'×0.9' 79° 12.04
ESO209-9 FGCE0684 07h58m15.6s -49°51'22" SBc 14.9 1119 6.2'×0.9' 82° 12.68
UGC4559 FGC103A 08h44m08.0s +30°07'07" Sb 27.8 2085 3.2'×0.5' 81° 14.10
NGC2654 PGC024784 08h49m12.5s +60°13'13" SBab 17.9 1342 4.2'×0.8' 79° 12.77
NGC2683 UGC04641 08h52m41.0s +33°25'03" Sb 5.5 410 8.8'×2.6' 77° 10.36
NGC3003 UGC5251 09h48m36.0s +33°25'18" SBc 19.7 1481 6.0'×1.4' 77° 12.15
NGC3221 UGC5601 10h32m20.4s +21°34'09" SBcd 54.8 4110 3.2'×0.7' 77° 13.80
NGC3365 UGC5878 10h46m13.1s +01°48'46" Sc 13.2 986 4.4'×0.7' 81° 13.04
NGC3501 UGC6116 11h02m46.9s +17°59'33" Sc 15.1 1133 3.5'×0.5' 82° 13.57
NGC3600 UGC6283 11h15m52.1s +41°35'27" Sab 9.6 1443 4.1'×0.9' 85° 12.60
NGC3628 UGC6350 11h20m16.3s +13°35'22" Sb 7.7 847 14.8'×3.0' 88° 10.42
NGC3877 UGC6745 11h46m08.0s +47°29'39" Sc 12.1 904 5.3'×1.2' 83° 11.85
NGC3936 ESO504-20 11h52m20.4s -26°54'24" SBbc 29.0 2022 3.9'×0.6' 81° 12.76
ESO379-6 FGCE0915 11h53m03.1s -36°38'20" Sbc 39.8 2986 2.6'×0.4' 81° 14.13
NGC4206 IC3064 12h15m16.6s +13°01'30" Sc 9.4 702 5.2'×1.0' 79° 12.80
NGC4216 UGC7284 12h15m53.1s +13°08'58" SBab 16.8 132 7.9'×1.7' 78° 10.95
NGC4235 IC3098 12h17m08.9s +07°11'31" Sa 32.1 2410 3.8'×0.8' 78° 12.64
NGC4256 UGC7351 12h18m44.2s +65°53'58" Sb 33.7 2528 4.1'×0.7' 80° 12.79
NGC4388 UGC7520 12h25m47.0s +12°39'42" Sb 33.6 2518 5.5'×1.5' 79° 11.91
NGC4700 PGC43330 12h49m07.8s -11°24'38" SBc 24.0 1407 3.0'×0.6' 78° 12.71
NGC4945 ESO219-24 13h05m26.2s -49°28'15" SBc 7.5 561 20.4'×4.1' 78° 9.15
NGC5290 UGC8700 13h45m19.2s +41°42'55" Sbc 34.4 2580 3.7'×1.0' 79° 12.93
NGC5297 UGC8709 13h46m24.2s +43°52'25" SBbc 67.5 2402 5.4'×1.2' 77° 12.37
NGC5775 UGC9579 14h53m57.7s +03°32'40" SBc 26.7 1681 4.2'×1.0' 82° 12.45
ESO274-1 FGCE1205 15h14m13.6s -46°48'45" Sd 7.0 522 11.0'×1.6' 82° 12.00
NGC5965 UGC9914 15h34m02.1s +56°41'10" Sb 45.5 3412 4.7'×0.7' 81° 13.21
NGC6722 ESO104-33 19h03m39.6s -64°53'41" Sab 76.7 5749 2.9'×0.4' 82° 13.56
IC4837A ESO184-47 19h15m15.7s -54°07'57" Sab 38.0 2847 4.1'×0.7' 80° 12.55
ESO142-19 PGC63351 19h33m18.0s -58°06'50" S0-a 56.2 4211 4.4'×1.1' 81° 13.56
IC4872 ESO142-24 19h35m42.3s -57°31'10" SBc 25.7 1928 3.5'×0.4' 83° 14.03
NGC6875A ESO284-24 20h11m55.6s -46°08'37" SBc 42.4 3176 2.8'×0.5' 80° 13.96
MCG-1-53-12 FGC2290 20h49m52.5s -07°01'21" Sc 79.5 5965 3.0'×0.4' 82° - - - -
IC5052 ESO74-15 20h52m06.3s -69°12'13" SBcd 7.9 591 5.9'×0.9' 81° 11.91
IC5071 ESO47-19 21h01m19.7s -72°38'33" SABb 41.6 3122 3.4'×0.8' 76° 13.28
IC5096 ESO107-19 21h18m21.0s -63°45'41" Sbc 41.9 3144 3.1'×0.5' 81° 13.30
NGC7064 ESO188-9 21h29m02.4s -52°45'58" SBc 11.4 858 3.4'×0.6' 80° 12.87
NGC7090 ESO188-12 21h36m28.6s -54°33'27" SBc 11.4 857 7.7'×1.4' 80° 11.47
UGC11841 FGC2351 21h52m48.0s +38°56'00" Scd 79.9 5990 2.8'×0.2' 86° - - - -
NGC7184 ESO601-9 22h02m38.5s -20°48'47" SBc 34.1 2617 6.0'×1.5' 76° 11.91
IC5171 ESO288-46 22h10m56.2s -46°04'54" SBb 34.1 2850 3.0'×0.4' 82° 13.45
IC5176 ESO108-20 22h14m54.5s -66°50'46" SBbc 23.3 1746 4.5'×0.5' 84° 13.52
NGC7339 UGC12122 22h37m46.9s +23°47'14" SBbc 17.9 1343 2.7'×0.7' 80° 13.07
NGC7361 IC5237 22h42m18.0s -30°03'29" Sc 15.9 1245 3.8'×1.0' 80° 12.90
NGC7412A ESO290-28 22h57m07.0s -42°48'15" SBd 12.4 929 3.9'×0.6' 81° 14.30
UGC12281 FGC2441 22h59m12.4s +13°36'21" Sc 34.2 2565 3.5'×0.3' 85° 14.79
NGC7462 ESO346-28 23h02m46.5s -40°50'02" SBbc 14.1 1061 4.0'×0.9' 84° 12.36
UGC12423 FGC2469 23h13m06.0s +06°24'00" Sc 64.5 4838 3.4'×0.4' 83° 14.41
NGC7640 UGC12554 23h22m06.7s +40°50'43" SBc 8.6 385 9.9'×2.2' 77° 11.46
ESO240-11 FGCE1839 23h37m49.4s -47°43'35" Sb 37.9 2843 5.2'×0.5' 84° 13.05

1 All data have been taken from the RC3 (de Vaucouleurs et al., 1991), or have been calculated from those data, except where indicated

2 taken from NED, and from (Schroeder & Visvanathan, 1996)

The observations for the northern hemisphere galaxies have been performed with CAFOS 2 in direct imaging mode, attached to the CAHA 2.2m telescope. The used CCD chip was a 2048 × 2048 pixel SITe#1d, with a pixel size of 24µm. The pixel scale was 0".53 pix-1, and the resulting field of view was 18'.1 × 18'.1. The used Halpha filters were the CA #658/10 and the CA #665/17 filters with a Delta lambda = 98Å and 168Å, respectively. The used R-band filter (Johnson R) was the CA #641/158 with Delta lambda = 1575Å.

The southern hemisphere galaxies have been observed with DFOSC 3 in imaging mode, attached to the Danish 1.54m telescope at La Silla/Chile. The used CCD camera was a LORAL/LESSER 2k×2k chip with a pixel size of 15µm. The pixel scale was 0".39 pix-1, and the maximum field of view (fov) was 13'.7 × 13'.7. Due to vignetting effects at the borders of the filters we have used only the inner 1601 × 1601 pixels of the CCD chip in most cases, yielding a fov of 10'.4 × 10'.4. The used Halpha filters were the ESO #693, #697, and #701 filters with a Delta lambda = 62.1Å, 61.6Å, and 63.1Å, respectively. The broad-band observations, to be used for the continuum subtraction, have been acquired through the ESO #452 (Bessel R) filter, which has a Delta lambda = 1647Å. Instrumental parameters for six additional objects can be found elsewhere (Rossa & Dettmar, 2000). The Halpha transmission curves of the filters, which have been used for this survey, are shown in Fig. 1. A journal of observations for our galaxies is given in Table 3.

Figure 1

Figure 1. Transmission curves for the ESO and Calar Alto Halpha filters (ESO #693, #697, #701 and CA#658/10, CA#665/17), respectively. The plot has been generated in the MIDAS environment with the use of the implemented ESO filter and edited CAHA filter table-files.

Table 3. Journal of observations

Galaxy Date Telescope Instrument Halpha filter Id. texp(Halpha)[s] texp(R)[s] Seeing ["]

NGC24 01/08/2000 DAN1.54 DFOSC ESO#693 2 × 2700 2 × 600 1.6
NGC100 10/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 2700 120 + 300
UGC260 12/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 2700 120 + 300 1.5
ESO540-16 01/08/2000 DAN1.54 DFOSC ESO#693 2 × 2700 2 × 600 1.7
MCG-2-3-16 10/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 300 + 600 1.2
NGC360 10/07/1999 DAN1.54 DFOSC ESO#697 2 × 2700 600
NGC669 13/08/1999 CAHA2.2 CAFOS CA#665/17 2 × 2700 120 + 300 1.7
UGC1281 12/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 2700 120 + 300 1.4
NGC891 11/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 120 + 300 2.0
UGC2082 13/08/1999 CAHA2.2 CAFOS CA#658/10 1 × 1800 300
IC1862 11/11/1999 DAN1.54 DFOSC ESO#701 2 × 2700 120 + 600 1.5
NGC1247 10/11/1999 DAN1.54 DFOSC ESO#697 2 × 2700 120 + 600 1.6
ESO117-19 22/02/1993 ESO2.2 EFOSC2 ESO#439 1 × 1800 900
22/02/1993 ESO2.2 EFOSC2 ESO#439 1 × 900 -
IC2058 10/11/1999 DAN1.54 DFOSC ESO#693 1 × 2700 120 + 600 1.4
10/11/1999 DAN1.54 DFOSC ESO#693 1 × 2200 -
ESO362-11 11/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 600 1.2
ESO121-6 13/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 300 1.3
NGC2188 23/02/1993 ESO2.2 EFOSC2 ESO#694 2 × 1800 600
ESO209-9 13/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 300 1.5
UGC4559 22/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 720 2.2
NGC2654 21/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 600
NGC2683 19/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 600 1.4
NGC3003 19/02/1999 CAHA2.2 CAFOS CA#658/10 1 × 1800 800 1.5
19/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 900 -
NGC3221 22/02/1993 ESO2.2 EFOSC2 ESO#439 1 × 1200 600
22/02/1993 ESO2.2 EFOSC2 ESO#439 1 × 900 -
NGC3365 21/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 720
NGC3501 22/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 720
NGC3600 20/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 720
NGC3628 08/05/1991 NTT EMMI ESO#596 1 × 1800 300
NGC3877 20/02/1999 CAHA2.2 CAFOS CA#658/10 2 × 1800 600
NGC3936 10/02/1995 NTT EMMI ESO#597 1 × 1200 300
ESO379-6 09/07/1999 DAN1.54 DFOSC ESO#697 1 × 3600 2 × 600 1.4
NGC4206 22/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1800 720 3.0
NGC4216 19/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1800 600
NGC4235 20/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1800 800 1.3
NGC4256 21/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1800 720
NGC4388 20/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1200 500
NGC4700 01/08/2000 DAN1.54 DFOSC ESO#693 2 × 2700 2 × 600 1.3
NGC4945 09/07/1999 DAN1.54 DFOSC ESO#693 1 × 2700 600 1.6
NGC5290 21/02/1999 CAHA2.2 CAFOS CA#665/17 2 × 1800 720
NGC5297 22/02/1999 CAHA2.2 CAFOS CA#658/10 1 × 1800 720 2.0
22/02/1999 CAHA2.2 CAFOS CA#658/10 1 × 1300 -
NGC5775 07/05/1991 NTT EMMI ESO#595 1 × 1800 600
ESO274-1 01/08/2000 DAN1.54 DFOSC ESO#693 2 × 2700 2 × 600 1.4
NGC5965 09/08/1999 CAHA2.2 CAFOS CA#665/17 2 × 2700 120 + 300
NGC6722 09/07/1999 DAN1.54 DFOSC ESO#697 2 × 2700 600
IC4837A 08/07/1999 DAN1.54 DFOSC ESO#697 2 × 2700 600 1.9
ESO142-19 10/07/1999 DAN1.54 DFOSC ESO#697 2 × 2700 600 1.8
IC4872 09/07/1999 DAN1.54 DFOSC ESO#693 2 × 2700 600 1.7
NGC6875A 10/07/1999 DAN1.54 DFOSC ESO#697 2 × 2700 600 1.4
MCG-1-53-12 10/08/1999 CAHA2.2 CAFOS CA#665/17 2 × 2700 120 + 300 1.3
IC5052 08/07/1999 DAN1.54 DFOSC ESO#693 2 × 2700 600 1.8
IC5071 31/07/2000 DAN1.54 DFOSC ESO#697 2 × 2700 2 × 600 1.9
IC5096 12/11/1999 DAN1.54 DFOSC ESO#697 2 × 2700 120 + 300 1.2
NGC7064 12/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 600 1.5
NGC7090 09/07/1999 DAN1.54 DFOSC ESO#693 1 × 1800 600 1.7
UGC11841 11/08/1999 CAHA2.2 CAFOS CA#665/17 2 × 2700 120 + 600
NGC7184 30/07/2000 DAN1.54 DFOSC ESO#697 2 × 2700 450 + 600 1.5
IC5171 31/07/2000 DAN1.54 DFOSC ESO#697 2 × 2700 2 × 600 1.9
IC5176 10/07/1999 DAN1.54 DFOSC ESO#693 2 × 2700 600 1.8
NGC7339 08/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 2700 120 + 300 1.7
NGC7361 31/07/2000 DAN1.54 DFOSC ESO#693 2 × 2700 600 1.7
NGC7412A 13/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 600 1.2
UGC12281 10/08/1999 CAHA2.2 CAFOS CA#665/17 2 × 2700 120 + 300 1.3
NGC7462 11/11/1999 DAN1.54 DFOSC ESO#693 2 × 2700 120 + 600 1.8
UGC12423 09/08/1999 CAHA2.2 CAFOS CA#665/17 1 × 2700 120
NGC7640 10/08/1999 CAHA2.2 CAFOS CA#658/10 2 × 2700 120 + 300
ESO240-11 30/07/2000 DAN1.54 DFOSC ESO#697 2 × 2700 2 × 600 2.0


1 Centro Astronómico Hispano Alemán Back.

2 Calar Alto Faint Object Spectrograph Back.

3 Danish Faint Object Spectrograph Camera Back.

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