Example of "Object Moves off Cross Hairs"

• by Vinokurov moderator

  Do you think about this?

  Posted February 5, 2014 2:47 PM

• by jdebes scientist, admin

  Great find! This is a classical example for "Object moves off the cross hairs". In this case there is a faint companion to the main target, that suddenly gets very bright at WISE4 and appears to "move". These sources might be hard to disentangle and so we wanted to reject these, at least in the first pass. You would also mark this as "Multiple objects within a circle".

  Posted February 5, 2014 2:49 PM

• by Vinokurov moderator

  Thanks and Good hunting!

  Posted February 5, 2014 2:54 PM

• by voyager1682002 moderator

  Another example here : http://talk.diskdetective.org/#/boards/BWI0000006/discussions/DWI000016v

  Posted February 8, 2014 7:42 AM

• by silviug

  I've noticed for many good candidates a slight shifting in the WISE and 2MASS K (2.16 μm) images. Could it be that a cooler companion (brown dwarf, even giant planet) be the culprit here?

  Examples:

  http://talk.diskdetective.org/#/subjects/AWI000052v

  http://talk.diskdetective.org/#/subjects/AWI00001ar

  http://talk.diskdetective.org/#/subjects/AWI00004yq

  http://talk.diskdetective.org/#/subjects/AWI00003q2

  http://talk.diskdetective.org/#/subjects/AWI00002hx

  http://talk.diskdetective.org/#/subjects/AWI0000bml

  All these above have almost identical SED's, also!

  And an extreme one:

  http://talk.diskdetective.org/#/subjects/AWI00003ey

  Posted February 8, 2014 8:58 PM

• by debastroc scientist, admin

  @silviug - These sources may well be composite objects with a red "companion". However, a brown dwarf or planet would not produce enough excess emission at 22 microns to move the source off-center by that amount and a planetary companion would not be so far away from its star. What would do this is a background galaxy or nebula offset by a few arcseconds. WISE's catalog is not so good at detecting red companions to bright stars. I'll talk about these in a blog post next week. Thanks for your help!

  Posted February 8, 2014 9:40 PM

• by silviug

  Thanks for the info!

  Posted February 8, 2014 10:34 PM

• by on_fire

  I just joined the project and there was not much of a tutorial. After viewing my first image, I am not sure if I have seen anything in the list or not and I don't want to classify improperly. Where can find out what I am looking for?

  Posted February 15, 2014 9:19 PM

• by debastroc scientist, admin

  Hi @on fire. At the top of your images on the left are three icon circles. The rightmost of these has a guidebook showing examples of what we are looking for. You can also look at the # identifications. Basically, what we want is something that looks round and centered in all the images - a star with a potential dusty disk.

  Posted February 15, 2014 9:43 PM

• by Ray_Van_Dune

  Just joined last night and did 9 classifications. Came back this morning, but did not see this study on the main menu. Found it on another menu of choices and did 6 more classifications... for a total of "0"!

  Posted February 16, 2014 3:11 PM

• by Ray_Van_Dune

  I meant to say that due to the main menu omission I am not completely confident that I am working on a "live" project, and due to the count discrepancy, that my classifications are being captured.

  Posted February 16, 2014 3:13 PM

• by jdebes scientist, admin

  Ray, we are most definitely live! I'm not sure why the discrepancy might exist--are you sure you were logged in for the whole time?

  Posted February 16, 2014 7:20 PM

• by Garlandiana

  ' Object Moves off Cross Hairs ' means that the main target , which is the blue object , at some point of time , moves off the focused area , or in other words , the red circle .

  Posted March 15, 2014 4:14 AM

• by Garlandiana

  So , was my definition of the ' Object Moves Off Cross Hairs ' correct ? Please do comment and reply .

  Posted March 24, 2014 8:17 AM

• by jdebes scientist, admin

  Sorry Gardiana for missing this post! We expect some misalignments between images to occur, but they shouldn't be larger than 1-2 widths of the cross hairs. So the example object that we have posted here is perfect, because it moves nearly halfway between the cross and the red circle. Anything larger than that would definitely count as moving off the cross-hairs, so your definition is just fine.

  Posted March 24, 2014 10:11 AM

• by Garlandiana

  Thanks Jdebes ! I was actually thinking of what it could possibly mean while having lunch . And lol , it's Garlandiana 😃 , not Gardiana !

  Posted March 25, 2014 5:11 AM

• by jdebes scientist, admin

  Sorry 😃

  Posted April 2, 2014 5:32 PM

• by Garlandiana

  Haha , it's okay !

  Posted April 5, 2014 1:33 PM