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WVS Online Observations Database

This application enables the display in a HTML page or the download as a gzipped semicolon separated text file of the observations made by the members of the VVS Working Group Variable Stars.

Object Display/select variable star name or object name
Designation Display/select harvard designation
JD range until Display/select JD range
Date range until Display/select date range (DD/MM/YYYY)
Magnitude Magnitude
Uncertainty Indication (: or ?) for uncertain observation
Comment Code Comment Code
Comparison Stars Comparison stars used for observation
Sequence Used sequence or chart for observation
Negative Obs Display negative (upper limit) observations
Observer Display/select observer initials

Please select the output format:
HTML
gzipped semicolon separated text file

Checkboxes
With the checkboxes one can choose the fields to be included in the output. The selection of a checkbox is independent from the value entered in a selection field. One can enter for instance a name for the Object while leaving the checkbox unselected. This only implies that the name of the object is not included in each line of the output.

Description of the fields:

Object / Designation
One of these field is required to select an object. The field Object accepts the name of the object for which the light curve has to be shown. If this field is filled out then the value entered in the Designation field is irrelevant. If one wants to use the Harvard Designation instead of the object name, the Object field has to remain empty. To get the object's name and/or the Harvard Designation in every record the checkboxes should be selected.

JD range / Date range
With these fields it is possible to enter a timespan for the requested observations. Time fields higher in the form take precedence of time fields lower in the form, i.e. when a JD is entered values entered into the date fields are neglected.
With all time fields left empty, all available observations of the object will be retrieved. Filling out the start JD / date and leaving the end JD / date empty retrieves the data starting from the entered JD / date until the current time. Filling out the end values and leaving the start values empty retrieves the observations from the first available observation until the entered end time.

Magnitude
This is an essential field to retrieve the observations and is therefore selected by default.

Uncertainty
Observations flagged with a ":" indicate that observer has some doubts about the accuracy of his observation. In the past these observations have been flagged with an "?" too. In case this checkbox is flagged then this additional information is shown. Important note: if this checkbox is not flagged the uncertain observations are included in the list but the uncertainty flags ":" and "?" are not included. Comment Code
Comment Codes are short codes to provide more information on the observation. The following list provides an explanation of the comment codes:

single-letter codes:

A

AAVSO Atlas

B

Sky is bright, twilight, light pollution, aurorae

F

Unconventional method (out of focus, visualphotometer, etc.)

G

Non-AAVSO chart with Guide Star Catalog magnitudes

H

Haze, mist, fog

I

Identification of star is uncertain

J

Non-AAVSO chart with HIPPARCOS magnitudes

K

Non-AAVSO chart or sequence used

L

Low in sky, horizon, trees, obstruction

M

Moon present or interferes

N

Angle, position angle

O

"Other" comment - MUST be explained in EXPLANATION field

R

Color comment (star is red, blue, etc.)

S

Comparison sequence comment or problem; do not usefor non-AAVSO sequence

T

Non-AAVSO chart with TYCHO magnitudes

U

Clouds

V

Faint star, glimpse, near limit

W

Weather (includes wind), poor seeing in general

Y

Activity in star - outburst, fading, flare, unusualbehavior

Z

Possibly erroneous, doubtful, observer fatigue

 

multiple-letter codes:

CD

CCD unfiltered

CCDB

CCD Johnson blue filter

CCDR

CCD Johnson red filter

CCDV

CCD Johnson visual filter

CCD-IR

CCD with IR-blocking filter

COMB

Observation is of nuclear and nebulous regionsCOMBined

NUC

Observation is of the NUClear region

PEP

Photoelectric photometer (Visual band)

PTG

Photographic observation

PV

Photovisual observation

Comparison Stars
To show the comparison stars used for the observation.

Sequence
To show the information on the used chart or sequence to make the observations.

Negative Obs
To show upper limit observations. If the star was invisible the magnitude of the faintest visible comparison could be reported.

Observer
To show the initials of the observer. The initials for a particular observer can be entered to display/download only the selected observer's observations.

Output format
To select the output format, either as a HTML page or to download the data as a gzipped semicolon separated text file.

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