CFHT Spring 2000 Finding Charts

These are finding charts made by R.Knop. For each candidate, there are the following files:

Finding Chart

The standard finding chart, with a large finding chart 6" on a side and a small finding chart 2" on a side.

Star Offsets

A text file with the offsets (in arcseconds) to the candidate, and the position angles between the offset stars and the candidate.

Zoom

An image of the candidate 1" on a side.

Tiles

The tiles output from subng. NOTE: Because of a bug, the "Mag" on the tiles plots may be incorrect!!!!

Photometric Redshift Plot

The V-I vs. B-V galaxy color plots we used to estimate redshift of host galaxies.
Outside reference redshift color-color plot
Our aggregate locus from all 12 CFHT chips

See sntrak on the Deepsearch PCs for more information.

Candidates are ranked in order of priority. [*] indicates a candidate sent to HST on 05/03. They are:

Beethoven (C00-008)

Prio: 6
Mag: 24.5
S/N: 7.2
%INC: 42

Notes: Good candidate well separated from host. Host looks like spiral.

Berlioz (C00-012)

Prio: 6
Mag: 24.8
S/N: 5.6
%INC: 60

Notes: Good candidate. Photometric redshift of host suggests that this is at z>0.8 or higher. Host looks like potentially a spiral.

Bernstein (C00-006)

Prio: 5
Mag: 23.1
S/N: 26.2
%INC: 36

Notes: Right on core, relatively low %INC. Rob suspects that this will turn out to be an AGN. Photometric redshifts suggest uninteresting z.

JC_Bach (C00-001)

Prio: 3
Mag: 24.4
S/N: 8.1
%INC: 23.4

Notes: A reasonably convincing candidate, but on core and low %INC. Lowered in priority because it's photometric redshift suggests that it's not at very high z.

Year-old Subtraction Scan. This is a screen shot of the subng tiles results for a subtraction between the April 7 search references and a year-old image of the same field. It looks like the candidate position may be suppressed on April 7. One possible conclusion is that this object has shown variation before, supporting our preexisting supposition that it is an AGN. However, this result is just barely over 1 sigma, and so is not a hard and fast conclusion.

Pay no attention to the fact that JC Bach is listed as 2.2" away. This is more an indication of problems in the validity of absolute positions from the APM solution than anything else.

WF_Bach (C00-010)

Prio: 3
Mag: 24.9
S/N: 5.1
%INC: 55.5

Notes: borderline candidate, positioned between bright galaxies, may not be real.

Boccherini (C00-015)

Prio: 3
Mag: 24.7
S/N: 5.6
%INC: 105

Notes: borderline candidate at best.

Kabalevsky (C00-007)

Prio: 3-
Mag: 25.2
S/N: 3.8
%INC: 36

Notes: unconvincing, unlikely, probably not real. Not found by the French subtraction. Do not do. Photometric redshift suggests spiral near z~1.

Dohnanyi (C00-004)

Prio: 3-
Mag: 25.4
S/N: 4.1
%INC: 173

Notes: unconvincing, unlikely, probably not real. Not found by the French subtraction. Do not do.

Holst (C00-017)

Prio: 2
Mag: 25.1
S/N: 4.6
%INC: 36

Notes: Yukky. Dubious. Unlikely. Saul seems to think it's a maybe, and I'm starting to think it's better than the previous four candidates, though still dubious. Sent to HST as a longshot, but we're not really happy about it.

The coordinate may be wrong by a couple of pixels! If you use star C as your angle star, then the slit angle should be roughly at the angle along which the coordinate is offset.

Year-old Reference Scan of Holst. This is what scantng gives us on the screen for subtracting a year-old (May 1999) reference from the April 7, 2000 search references. The year old references are not as deep, as may easily been seen from the noise in the top set of panels. (The images are plotted unconvolved.) The alarming thing is that it looks like a slight depression in the April 7 image may have contributed to what we interpreted as a candidate.