Step 4: Preparing a list of observation
requests (continued)
Specifying mosaics of CCD fields (continued)
A minor planet search could use mosaics of CCD fields with rows oriented in the
east-west direction, that is, PA = 90 deg. In this case, one could prepare
a text file containing a list of names and centers for various mosaics in different
parts of the sky,
Mosaic_1 13 25 00.00 +35 00 00.0
Mosaic_2 15 00 00.00 -11 00 00.0
Mosaic_3 18 30 00.00 -17 00 00.0
Mosaic_4 20 12 00.00 +00 00 00.0
Mosaic_5 22 00 00.00 +14 00 00.0
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add these objects to TAO's fixed object database
with the help of program addFixedTargets, and then
request mosaics around the various center coordinates:
Mosaic_1; &
PA=90 width=3.50 overlap=1.50 dRA=0. ddec=0. &
-1 -1 &
0 -1 &
1 -1 &
-1 0 &
0 0 &
1 0 &
-1 1 &
0 1 &
1 1
Mosaic_2; &
PA=90 width=3.50 overlap=1.50 dRA=0. ddec=0. &
0 0 &
1 0 &
2 0 &
3 0
...
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Notes:
- All fields in a mosaic will be scheduled using identical parameters. In particular,
the exposure time, camera resolution, frame size, frame mode, filter, observing
window, minimum altitude, maximum |hour angle|, moon avoidance radius, image
insertion method, and request
identifier will be the same for all fields. The number of requested images per field
will be the same for all fields; if the timeseries
keyword is specified on
the first line of the mosaic request, then different numbers of images may be
scheduled for each field.
- The default options specified in the user's profile
may be overriden in the same way as for non-mosaic requests, by specifying
the non-default options on the first line of the request:
2002 XH4; 4i exp=300. filter=I &
PA=36.5 width=3.50 overlap=1.50 dRA=-.00137 ddec=-.02052 &
0 0 &
-1 0 &
1 0 &
-2 0 &
2 0
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The above request would be identical to the previously discussed example about the
recovery of 2002 XH4, except that now four 300-sec I-band exposures of each field
are being requested.
- The fields in a mosaic may be labeled with individual request
identifiers. For example, in the request
C/2003 F1; &
PA=36.5 width=3.50 overlap=1.50 dRA=-.00137 ddec=-.02052 &
0 0 &
-1 0 #MT-052 &
1 0 &
-2 0 # &
2 0 #AM-441
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fields (-1,0) and (2,0) have identifiers MT-052 and AM-441, respectively, and the other
three fields have blank identifiers. If an identifier is specified on the first line
of a mosaic request, it applies to all fields for which individual requests have not been
specified. For example, in the request
2004 JB12; #C042-A &
PA=36.5 width=3.50 overlap=1.50 dRA=-.00137 ddec=-.02052 &
0 0 &
-1 0 #SP-332 &
1 0 &
-2 0 # &
2 0 #MG-163
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fields (0,0) and (1,0) share the identifier C042-A, fields (-1,0) and (2,0) have
identifiers SP-332 and MG-163, respectively, and field (-2,0) has a blank identifier.
Previous: Specifying mosaics of CCD fields
Next: Running the scheduler
© 1999-2004 Paulo Holvorcem
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