Large Magellanic Cloud
Datasets
CDS page
link
A revised and extended catalog of
Magellanic system clusters, associations, and
emission nebulae. II. The Large Magellanic Cloud.
Related Links
Download the ZIP
files and UNZIP the contents into the default SDB folder. Actually the files can be
placed anywhere on your system. The default SDB folder just makes sense. There
are three files in the ZIP file. Henize.txt, Henize.SDB, and the readme file
associated with the text.
Click here for complete details on how to access
data from the NASA Extragalactic
Database (NED) site
Enabling Object Type Mixed Deep Sky
View | Display Explorer
Mixed Deep Sky enabled
Data | Import
Distribution across TheSky shown
6,659 total
6,659 objects in the LMC
By compiling the text file using an object
type like Mixed Deep Sky or Nebula the fields that contain the Major/Minor
Axis and position angle allow the sizes of the objects to be shown. See
below. Plotting the
object sizes
using Major Axis/Minor Axis and Position
Angle
NOTE: The default color for Mixed Deep
Sky is a much fainter gray. The green color here is for illustration purposes.
If you wish to change the properties, line type/color, font size/color and fill
color use View | Display Explorer then find the object type and choose
properties.
View | Display Properties
Change accordingly
Header defining the fields of the data (Henize
data)
;Copyright, TheSky
>SEARCH 46,100
>ALIAS 46,80
>RAHOURS 7,8
>RAMINUTES 10,11
>RASECONDS 13,14
>DECSIGN 16,16
>DECDEGREES 17,18
>DECMINUTES 20,21
>DECSECONDS 23,24
>MAJOR AXIS 30,34
>MINOR AXIS 36,40
>POSITION ANGLE 41,44
>CATALOG CLASS=POINTS
>LOADMEMORY
>IDENTIFIER Henize LMC
>PARSE "Sky Survey Plate Quadrant" 1,5
>PARSE "Classification" 26,27
>PARSE "Position Angle Minor Axis" 41,45
>PARSE "Cross Reference" 46,100
>PARSE "Description" 105,125
>OBJECT TYPE 20
In the above header the object type 20 is
object type Nebula allowing the sizes and position angles to show. You could
also use object type Nebula (#14) as well. Since the objects in the dataset are
not all the same type Mixed Deep Sky makes more sense in this case. Mixed Deep
Sky is Object type 20.
Data | Import
Object Type 20 - Mixed Deep Sky
However if you want to
make your own custom object type for the
Henize dataset click here for exactly how to do this!
The Henize SDB was originally
compiled as object type Mixed Deep Sky - Object Type = 20. When using an
object type of Reference Points the objects will not take on a size even if
the Major/Minor Axis and Position angle have been specified. In this case
they are merely small reference markers. See Below.
TheSky Display showing objects no sizes shown
Large Magellanic Cloud - LMC
Because this dataset has the
information needed to plot size you can compile it using object type Nebula
or Mixed Deep Sky and by doing so you can see the
approximate
size of the object in addition to it's coordinates <---Click here
for how. ;Copyright, TheSky
>SEARCH 46,100
>ALIAS 46,80
>RAHOURS 7,8
>RAMINUTES 10,11
>RASECONDS 13,14
>DECSIGN 16,16
>DECDEGREES 17,18
>DECMINUTES 20,21
>DECSECONDS 23,24
>MAJOR AXIS 30,34
>MINOR AXIS 36,40
>POSITION ANGLE 41,44
>CATALOG CLASS=POINTS
>LOADMEMORY
>IDENTIFIER Henize LMC
>PARSE "Sky Survey Plate Quadrant" 1,5
>PARSE "Classification" 26,27
>PARSE "Position Angle Minor Axis" 41,45
>PARSE "Cross Reference" 46,100
>PARSE "Description" 105,125
>OBJECT TYPE 55
In the above header the object type 55 is
object type Reference Point which does not allow the sizes and position angles
to show even though the fields for Major/Minor Axis and Position Angle were
assigned accordingly.
See below for
details on how to compile the data using the object size and orientation.
Use Data | Import
to Re-Compile the SDB using a new object type. You can hard code it in the
header or simply on the fly when compiling.
Because this dataset does not
contain a unique name for searching you will have to use Edit | Find then
expand the group Henize LMC to see the individual entries listed.
Individual objects shown
Note: Check mark Frame Object and Object Information
It is VERY
handy to use the option to center the objects and/or display Object
Information on the Find dialog. This way as you scroll down the list using
the down arrow key each object is conveniently centered and the object is
information displayed. Nice!
Or
By entering Find Henize LMC followed by the search
criteria you can search the dataset. Example Henize LMC 1629 shows,
Edit | Find - Henize LMC NGC 1629
Returns the above
If you wish to label any of
the fields you can use the Extended labeling on the SDB file. Just use View
| Display Explorer and expand the Henize LMC entry under Sky Database
Manager as shown. Place a check mark next to the field(s) you want labeled.
Display Explorer
Check the fields to label here
Lastly make sure that View |
Labels | Extended Labels are set to visible - checked. That does it.
Because the dataset does not
contain a magnitude for the objects none is shown. Magnitude is equal to
zero. However, if you access the cross reference objects like say the NGC
data instead the magnitude will be reported from the NGC data. In the above
example searching for NGC 1629 instead will show the NGC magnitude for the
object.
In this example Magnitude 30 for NGC 1629<---
Magnitude 30 what the??
Key
LMC-N 407 N Henize 1956ApJS....2..315H
H 12 C Hodge 1960ApJ...131..351H
SL 898 C Shapley & Lindsay 1963IrAJ....6...74S
LW 435 C Lynga & Westerlund 1963MNRAS.127...31L
HS 457 C Hodge & Sexton 1966AJ.....71..363H
U a 6 C Hodge & Sexton 1966AJ.....71..363H
LH 122 A Lucke & Hodge 1970AJ.....75..171L
Rob 1 C Robertson 1974A&AS...15..261R
LMC-DEM 352 N Davies et al. 1976MmRAS..81...89D
C 11 C Hodge 1975IrAJ...12...77H
H80-F 132 C Hodge 1980AJ.....85..423H
SGshell-LMC 9 N, A Meaburn 1980MNRAS.192..365M
Shapley- 9 A, N C van den Bergh 1981A&AS...46...79V
SNR 25 N Mathewson et al. 1983ApJS...51..345M
HT 4 N Heydari-Malayeri & Testor 1983A&A...118..116H
LT- 6 C Lortet & Testor 1984A&A...139..330L
SNR 2 N Mathewson et al. 1984ApJS...55..189M
SNR 7 N Mathewson et al. 1985ApJS...58..197M
HNT 1 NC Heydari-Malayeri et al. 1987A&A...184..300H
M-OB 6 C, A Melnick 1987IAUS..121..545M
KMK88- 93 C Kontizas et al. 1988AJ.....96.1625K
H88- 255 C Hodge 1988PASP..100.1051H
BH 138 C Bhatia & Hatzidimitriou 1988MNRAS.230..215B
OHSC 37 C Olszewski et al. 1988AJ.....95...84O
BM 282 A Bhatia & MacGillivray 1989A&A...211....9B
KMHK 1762 C Kontizas et al. 1990A&AS...84..527K Cat. <VII/183>
IDK 1 A Irwin et al. 1990AJ.....99..191I
BRHT 128 C Bhatia et al. 1991A&AS...87..335B
BD 5 A Battinelli & Demers 1992AJ....104.1458B
BCD 1 C Bica et al. 1992AJ....103.1859B
SNR 2 N Smith et al. 1994AJ....108.1266S
KKDAB- 7 A Kontizas et al. 1994A&AS..107...77K
BCDSP 8 C, A Bica et al. 1996ApJS..102...57B
ZHT 16 C Zaritsky et al. 1997AJ....114.1002Z
ZHT-SP b 10 C Zaritsky et al. 1997AJ....114.1002Z
SESG 2 C Santiago et al. 1998MNRAS.295..860S
BSDL 3246 C, N, A This paper 1999AJ....117..238B
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