This page gives quick access to the webservices and links of the tools, which can be called programatically.
First section covers the description of Webservices REST-api and small usage examples.
Second section provides quick links to the tools, showing examples how to construct their URLs.
Table 1: List of REST web services
Webservices | Short Description |
Image Cutout | Returns color images at given location. There are two resources /getJpeg and /getJpegCodec |
VO Services | Services to search databases using IVOA standards and protocols. /conesearch, /SIAP, /SDSSFields |
Search | Returns specific database results. There are three services availble /radial, /rectangular and /sql |
Advanced Search | Equivalent to search tools, there are three services /imagingquery, /spectroquery, /irspectraquery |
Cross-id | Upload your own objects for cross-identification |
Web services described above can used either as an authenticated user or anonymous users.
If user wants to use her own authentication tokens following header parameters needs to be set.
There are common for all the services listed below.
Header Names | Values |
X-Auth-Token | Keystone token. If omitted, the query will be executed anonymously. |
Table 2: List of Tools
Tools | Short Description |
Get Frame | Access frame pictures |
Get Scrolling Sky Image | Animated images of the sky passing the telescope |
Spectra Services | Access spectra graphs and data, and use Web Service access to details of spectra |
Finding Chart | Call Finding Chart at a particular location |
Navigate | Pull up navigator with particular location |
Image List | Display thumbnails for uploaded object list |
Explore | Interactive exploration of object properties |
Note that these web services and tools are the called when the corresponding Skyserver web applications are executed by the user.
You can see the parameters that where used in these cases by reviewing the User History page (if you are already logged-in with Sciserver).
REST Web Services
Image Cutout
There are two resources available under this service.
1. GET or POST /getJpeg
Prameters | Expected Values |
Ra | Right Ascention in degrees |
Dec | Declination in degrees |
scale | Scale of image in arsec per pixel, 0.4 is default |
height | in pixels |
width | in pixels |
opt | a string of characters for overlays on image (details below). This is an optional parameter |
Code | Effect on image |
G | Grid | L | Label | P | PhotoObjs | S | SpecObjs | T | TargetObjs | O | Outline | B | BoundingBox | F | Fields | M | Masks | Q | Plates | I | InvertImage |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ImgCutout/getjpeg?ra=184.9511&dec=-0.8754&scale=0.4&height=512&width=512&opt=GO
2. GET or POST /getJpegCodec
Prameters | Expected Values |
R | SDSS Run number |
C | SDSS Camcol number |
F | SDSS Field number |
Z | SDSS Zoom number |
Example:http://skyserver.sdss.org/dr16/SkyServerWS/ImgCutout/getJpegCodec?R=1140&C=1&F=120&Z=12
VO Webservices
Following web services are developed on standards and protocols given by International Virtual Observatory Alliance.
These services we are supporting as is.
1. Cone Search GET or POST /conesearch
Prameters | Expected Values |
Ra | Right Ascention in degrees |
Dec | Declination in degrees |
sr | Radius in arcminutes |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ConeSearch/ConeSearchService?ra=145&dec=34&sr=1
2. SDSS Fields Search GET or POST /sdssfields
This webservices has four resources as below
2.1 /FieldArray
Prameters | Expected Values |
ra | Right Ascention in degrees |
dec | Declination in degrees |
radius | Radius in arcminutes |
format | output file format. E.g. csv,html,xml,json |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SDSSFields/FieldArray?ra=132&dec=12&radius=10&format=json
2.2 /FieldArrayRect
Prameters | Expected Values |
ra | Right Ascention in degrees one corner |
dec | Declination in degrees one corner |
dra | Right Ascention in degrees other corner |
ddec | Declination in degrees other corner |
format | output file format. E.g. csv,html,xml,json |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SDSSFields/FieldArrayRect?ra=132&dec=12&dra=0.1&ddec=0.1&format=json
3. SIAP GET or POST /siap
Simple Image Access Protocol is a virtual Observatory protocol, web service gives options to get SDSS images data
3.1 /getSIAPinfoAll
Siap search for all bands. It outputs all fields (images) included in the Region of Interest.
Prameters | Expected Values |
POS | Position (string with comma seperation) in Right Ascention, Declination in degrees |
SIZE | Size in degrees |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SIAP/getAllSIAPInfoSIAP/getSIAP?POS=132,12&SIZE=0.1&FORMAT=image/jpeg
3.2 /getSIAP
Get the image access via SIAP.
Prameters | Expected Values |
POS | Position (string with comma seperation) in Right Ascention, Declination in degrees |
SIZE | Size in degrees |
FORMAT | format , one of the following values: 'METADATA', 'ALL','GRAPHIC','image/fits', or 'image/jpeg' (string) |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SIAP/getSIAP?POS=132,12&SIZE=0.1&FORMAT=metadata&bandpass=i
3.3 /getSIAPinfo
Siap search by band name. It outputs all fields (images) included in the Region of Interes
Prameters | Expected Values |
POS | Position (string with comma seperation) in Right Ascention, Declination in degrees |
SIZE | Size in degrees |
FORMAT | one of the following values: 'METADATA', 'ALL','GRAPHIC', 'image/fits', or 'image/jpeg' (string) |
BANDPASS | band name, any combination of 'u', 'g', 'r', 'i', 'z' or '*' to get them all in addition to the jpeg mosaic (string) |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SIAP/getSIAPInfo?POS=132,12&SIZE=0.01&FORMAT=metadata&bandpass=i
Search
1. Radial Search GET or POST /radialSearch
Prameters | Expected Values |
ra | Right Ascention in degrees |
dec | Declination in degrees |
radius | Radius in arcminutes |
format | output file format. E.g. csv,html,xml,votable,json,fits,mydb |
limit | maximum number of rows retrieved. If set to 0, then all rows will be retrieved. |
coordtype | set to equatorial or galactic, depending on the coordinate system which the ra,dec values are based. |
whichphotometry | set to optical or infrared, in order to choose between SDSS legacy or Apogee data. |
*band | * is a wildcard for u, g, r, i, z, j, h, or k, which represent photmetric bands. These are optional parameters for the aparent magnitude limits of the objects. They are defined as a comma seperated range e.g uband=0,20. |
check_* | * is a wildcard for u, g, r, i, z, j, h, or k, which represent photmetric bands. These are optional parameters that make effective the aparent magnitude limits defined by the paremeter *band. They take the values u, g, r, i, z, j, h, or k, respectively, e.g check_u=u. |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SearchTools/RadialSearch?ra=258.2&dec=64&radius=4.1&whichway=equatorial&limit=10&format=html&fp=none&uband=0,17&check_u=u&gband=0,15&check_g=g&whichquery=imaging
2. Rectangular Search GET or POST /radialSearch
Prameters | Expected Values |
min_ra | Right Ascention in degrees in one corner |
min_dec | Declination in degrees in one corner |
max_ra | Right Ascention in degrees in other corner |
max_dec | Declination in degrees in other corner |
format | output file format. E.g. csv,html,xml,votable,json,fits,mydb |
limit | maximum number of rows retrieved. If set to 0, then all rows will be retrieved. |
coordtype | set to equatorial or galactic, depending on the coordinate system which the ra,dec values are based. |
whichphotometry | set to optical or infrared, in order to choose between SDSS legacy or Apogee data. |
*band | * is a wildcard for u, g, r, i, z, j, h, or k, which represent photmetric bands. These are optional parameters for the aparent magnitude limits of the objects. They are defined as a comma seperated range e.g uband=0,20. |
check_* | * is a wildcard for u, g, r, i, z, j, h, or k, which represent photmetric bands. These are optional parameters that make effective the aparent magnitude limits defined by the paremeter *band. They take the values u, g, r, i, z, j, h, or k, respectively, e.g check_u=u. |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SearchTools/RadialSearch?min_ra=250.2&max_ra=250.5&min_dec=35.1&max_dec=35.5&whichway=equatorial&limit=10&format=html&fp=none&uband=0,17&check_u=u&gband=0,15&check_g=g&whichquery=imaging
3. SQL Search GET or POST /sqlSearch
Prameters | Expected Values |
cmd | SQL query |
format | output file format. E.g. csv,html,xml,votable,json,fits,mydb |
limit | maximum number of rows retrieved. If set to 0, then all rows will be retrieved. |
syntax | If set to Syntax, then only a syntax check is performed on the SQL query and no result table is returned. |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SearchTools/SqlSearch?cmd=select%20top%2010%20ra,dec%20from%20Frame&format=csv
Advanced Search
1. ImagingQuery Search GET or POST /ImagingQuery
Get the query results on Imaging data from SDSS database.
1.1 /Cone
Conical search on the imaging data.
Prameters | Expected Values |
limit | maximum number of rows retrieved. If set to 0, then all rows will be retrieved. |
format | output file format. E.g. csv,html,xml,votable,json,fits,mydb |
ra, dec | sky cordinates to search |
radius | search radius in arcmin |
uMin,gMin,rMin,iMin,zMin | Lower bounds of the magnitudes of objects (in the SDSS photometric bands) |
uMax,gMax,rMax,iMax,zMax | Upper bounds of the magnitudes of objects (in the SDSS photometric bands) |
ugMin,grMin,riMin,izMin | Lower bounds of the colors of objects (in the SDSS photometric bands) |
ugMax,grMax,riMax,izMax | Upper bound of the colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters: imaging fields to be included as columns in the resuts table. |
specparams | spectroscopy parameters: spectroscopic fields to be included as columns in the resuts table. |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ImagingQuery/Cone?limit=50&format=csv&imgparams=minimal&specparams=none&ra=10&dec=0.2&radius=5.0&magType=model
1.2 /NoPosition
Search imaging data with no positional constraints.
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ImagingQuery/NoPosition?format=html&limit=30&izMin=3&izMax=4&riMin=&riMax=&flagsonlist=BRIGHT,EDGE&magType=model&uMin=0
1.3 /Proximity Only POST method.
Proximity query searches objects based on user input coordinates.
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
radecTextarea | comma separated values of (RA,Dec) coordinates of the objects in the first 2 columns. The optional third column is search radius. Column names should be included in the first row. |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ImagingQuery/Proximity?searchtool=Imaging&limit=50&format=html&imgparams=minimal&specparams=none&raMin=10&decMin=0.20&raMax=10.2&decMax=0.22&positionType=proximity&radecTextarea=ra%2Cdec%2Csep%0D%0A256.443154%2C58.0255%2C1.0%0D%0A29.94136%2C0.08930%2C1.0%0D%0A&searchNearBy=nearest&radiusDefault=1.0
1.4 /Rectangular
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
raMin,raMax,decMin,decMax | sky cordinates to search |
radius | search radius in arcmin |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/ImagingQuery/Rectangular?limit=50&raMin=258&raMax=258.2&decMin=64&decMax=64.1&imgparams=typical,minimal&magType=model&format=csv
2. Spectroquery Search GET or POST /SpectroQuery
Similar to Imaging Query search one can do search on the spectral data.
They are divided in four sub positional services. Cone,Rectangular,Proximity,NoPosition etc.
2.1 /Cone
Conical search on the imaging data, main input parameters are ra, dec and radius.
Prameters | Expected Values |
ra, dec | sky cordinates to search |
radius | search radius in arcmin |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
priFlagsOnList | comma separated list of primary flags set to on |
priFlagsOffList | comma separated list of primary flags set to off |
secFlagsOnList | comma separated list of secondary flags set to on |
secFlagsOffList | comma separated list of secondary flags set to off |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SpectroQuery/ConeSpectro?radius=5.0&dec=0.2&ra=10&uMin=0&uMax=20&objType=doGalaxy,doStar&limit=50&format=csv&specparams=minimal&imgparams=none&redshiftMin=&zWarning=on&redshiftMax=&priFlagsOnList=ignore&priFlagsOffList=ignore&secFlagsOnList=ignore&secFlagsOffList=ignore&magType=model&gMin=&rMin=&iMin=&zMin=&gMax=&rMax=&iMax=&zMax=&ugMin=&grMin=&riMin=&izMin=&ugMax=&grMax=&riMax=&izMax=&minQA=&flagsOnList=ignore&flagsOffList=ignore
2.2 /NoPosition
Search imaging data with no positional constraints.
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
priFlagsOnList | comma separated list of primary flags set to on |
priFlagsOffList | comma separated list of primary flags set to off |
secFlagsOnList | comma separated list of secondary flags set to on |
secFlagsOffList | comma separated list of secondary flags set to off |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SpectroQuery/NoPositionSpectro?limit=30&izMin=3&izMax=4&riMin=&riMax=&flagsonlist=BRIGHT,EDGE&magType=model&uMin=0&format=html
2.3 /Proximity POST method only
Proximity query searches data on user input data.
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
priFlagsOnList | comma separated list of primary flags set to on |
priFlagsOffList | comma separated list of primary flags set to off |
secFlagsOnList | comma separated list of secondary flags set to on |
secFlagsOffList | comma separated list of secondary flags set to off |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SpectroQuery/ProximitySpectro?searchtool=Spectro&limit=50&format=html&imgparams=minimal&specparams=minimal&raMin=10&decMin=0.20&raMax=10.2&decMax=0.22&positionType=proximity&radecTextarea=ra%2Cdec%2Csep%0D%0A256.443154%2C58.0255%2C1.0%0D%0A29.94136%2C0.08930%2C1.0%0D%0A&searchNearBy=nearest&radiusDefault=1.0
2.4 /Rectangular
Rectangular search takes two corners of rectangular area.
Prameters | Expected Values |
raMin,raMax,decMin,decMax | sky cordinates to search |
limit | limit the number of rows in result |
format | result format |
u,g,r,i,z | magnitudes of the objects in the SDSS |
ug,gr,ri,iz | colors of the objects in the SDSS |
objType | To select star or galaxy |
magType | magnitudes of the objects in the SDSS |
imgparams | imaging parameters |
specparams | spectroscopy parameters |
priFlagsOnList | comma separated list of primary flags set to on |
priFlagsOffList | comma separated list of primary flags set to off |
secFlagsOnList | comma separated list of secondary flags set to on |
secFlagsOffList | comma separated list of secondary flags set to off |
flagsOnList | comma separated list of photometric flags set to on |
flagsOffList | comma separated list of photometric flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/SpectroQuery/RectangularSpectro?limit=50&raMin=258&raMax=258.2&decMin=64&decMax=64.1&imgparams=typical,minimal&magType=model&format=csv
3. IRSpectra query Search GET or POST /IRSpectraQuery/
Similar to Imaging Query search one can do search on the spectral data.
They are divided in four sub positional services. Cone,Rectangular,Proximity,NoPosition etc.
3.1 /ConeIR
Conical search on the IR Spectra data, main input parameters are ra, dec and radius.
Prameters | Expected Values |
ra, dec | sky cordinates to search |
radius | search radius in arcmin |
limit | limit the number of rows in result |
format | result format |
j,h,k (min and max) | IR magnitudes of the objects in the SDSS |
jh,hk (min and max) | IR colors |
snr, vhelio, scatter (min and max) | Observational Parameters |
Temp,logg,feh,afe (min and max) | Stellar Parameters |
irspecparams | IR spectroscopy parameters |
irTargetFlagsOnList | list of APOGEE_Target1 flags set to on |
irTargetFlagsOffList | list of APOGEE_Target1 flags set to off |
irTargetFlags2OnList | list of APOGEE_Target2 flags set to on |
irTargetFlags2OffList | list of APOGEE_Target2 flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/IRSpectraQuery/ConeIR?limit=50&format=json&irspecparams=typical&ra=271.75&dec=-20.19&radius=5.0&Lcenter=10&Bcenter=0.2&lbRadius=5.0&jMin=&hMin=&kMin=&jMax=&hMax=&kMax=&jhMin=&hkMin=&jhMax=&hkMax=&snrMin=&vhelioMin=&scatterMin=&snrMax=&vhelioMax=&scatterMax=&tempMin=&loggMin=&fehMin=&afeMin=&tempMax=&loggMax=&fehMax=&afeMax=&irTargetFlagsOnList=ignore&irTargetFlagsOffList=ignore&irTargetFlags2OnList=ignore&irTargetFlags2OffList=ignore
3.2 /GalacticIR
Search IR Spectra with galactic coordinates.
Prameters | Expected Values |
LCenter, Bcenter | Galactic co-ordinates |
lbRadius | search radius in arcmin |
limit | limit the number of rows in result |
format | result format |
j,h,k (min and max) | IR magnitudes of the objects in the SDSS |
jh,hk (min and max) | IR colors |
snr, vhelio, scatter (min and max) | Observational Parameters |
Temp,logg,feh,afe (min and max) | Stellar Parameters |
irspecparams | IR spectroscopy parameters |
irTargetFlagsOnList | list of APOGEE_Target1 flags set to on |
irTargetFlagsOffList | list of APOGEE_Target1 flags set to off |
irTargetFlags2OnList | list of APOGEE_Target2 flags set to on |
irTargetFlags2OffList | list of APOGEE_Target2 flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/IRSpectraQuery/GalacticIRIRSpectraQuery/GalacticIR?limit=50&format=csv&irspecparams=typical&Lcenter=10&Bcenter=0.2&lbRadius=5.0&jMin=&hMin=&kMin=&jMax=&hMax=&kMax=&jhMin=&hkMin=&jhMax=&hkMax=&snrMin=&vhelioMin=&scatterMin=&snrMax=&vhelioMax=&scatterMax=&tempMin=&loggMin=&fehMin=&afeMin=&tempMax=&loggMax=&fehMax=&afeMax=&irTargetFlagsOnList=ignore&irTargetFlagsOffList=ignore&irTargetFlags2OnList=ignore&irTargetFlags2OffList=ignore
3.3 /NoPositionIR
No positional constraints.
Prameters | Expected Values |
limit | limit the number of rows in result |
format | result format |
j,h,k (min and max) | IR magnitudes of the objects in the SDSS |
jh,hk (min and max) | IR colors |
snr, vhelio, scatter (min and max) | Observational Parameters |
Temp,logg,feh,afe (min and max) | Stellar Parameters |
irspecparams | IR spectroscopy parameters |
irTargetFlagsOnList | list of APOGEE_Target1 flags set to on |
irTargetFlagsOffList | list of APOGEE_Target1 flags set to off |
irTargetFlags2OnList | list of APOGEE_Target2 flags set to on |
irTargetFlags2OffList | list of APOGEE_Target2 flags set to off |
Example:
http://skyserver.sdss.org/dr16/SkyServerWS/IRSpectraQuery/NoPositionIR?limit=50&format=csv&irspecparams=typical&jMin=&hMin=&kMin=&jMax=&hMax=&kMax=&jhMin=&hkMin=&jhMax=&hkMax=&snrMin=&vhelioMin=&scatterMin=&snrMax=&vhelioMax=&scatterMax=&tempMin=&loggMin=&fehMin=&afeMin=&tempMax=&loggMax=&fehMax=&afeMax=&irTargetFlagsOnList=ignore&irTargetFlagsOffList=ignore&irTargetFlags2OnList=ignore&irTargetFlags2OffList=ignore
Cross-Identification
GET or POST /CrossIDsearch/
You can search for photometric (image) and/or spectroscopic
objects using the same cross-id form. You may use POST or GET
methods to this URL - the basic form is as follows.
The GET method (example for default crossid page):
http://skyserver.sdss.org/dr16/SkyServerWS/SearchTools/CrossIdSearch?searchtool=CrossID&searchType=photo&photoScope=nearPrim&photoUpType=ra-dec&radius=0.5&firstcol=1&paste=++name++ra+++++++dec%0D%0A++A1+++195.2++++2.5%0D%0A++A2+++194.5++++2.6%0D%0A++A3+++193.6++++2.8%0D%0A++A4+++-90.1++++-90.051%0D%0A&upload=&uquery=SELECT+%0D%0A+++p.objID%2C+p.ra%2C+p.dec%2C+p.run%2C+p.rerun%2C+p.camcol%2C+p.field%2C%0D%0A+++dbo.fPhotoTypeN(p.type)+as+type%2C%0D%0A+++p.modelMag_u%2C+p.modelMag_g%2C+p.modelMag_r%2C+p.modelMag_i%2C+p.modelMag_z+%0D%0AFROM+%23x+x%2C+%23upload+u%2C+PhotoTag+p%0D%0AWHERE+u.up_id+%3D+x.up_id+and+x.objID%3Dp.objID+%0D%0AORDER+BY+x.up_id%0D%0A%09%09&format=html
Tools
Get Frame
http://cas.sdss.org/dr16/en/get/frameByRCFZ.ashx?R=1140&C=1&F=120&Z=12
where R is the Run, C is the CamCol and Z is the Zoom level (Z can be either 12, 25, 50 or 0 (for 100%)), or
http://cas.sdss.org/dr16/en/get/frameById.ashx?id=1237650369404207104&zoom=12
where id is the fieldId.
Get Scrolling Sky image
http://cas.sdss.org/dr16/en/tools/scroll/camcol.aspx?R=1140&C=1&Z=25
Where R is the Run number , C is the CamCol and Z is the Zoom
level. Z can be either 12, 25, 50 or 0 (for 100%).
Spectra Services
1. Get Spectra
http://cas.sdss.org/dr16/en/get/specByPF.ashx?P=299489402567026688&F=25
where P is the Plate and F is the Fiber, or
http://cas.sdss.org/dr16/en/get/specById.ashx?ID=301889361622886400
where ID is the SpecObjId.
2. Full Spectral Access
There is a comprehensive web site to access the details of spectra from the SDSS
and other surveys (2dF). You can also upload your own spectra.
http://www.voservices.net/spectrum/
This site also has a Filter Profile service and a SOAP interface
to the spectrum service described in its documentation page .
Finding Chart
The page, built on top of the Cutout service, creates a Finding Chart, centered
on the specified location at a specified scale. Properly formatted finding charts
can be sent to the printer. The printed image is always inverted for better looking
prints.
You may jump directly to a particular location with the navigation tool using:
http://cas.sdss.org/dr16/en/tools/chart/image.aspx?ra=184.9511&dec=-0.8754&scale=0.4&height=512&width=512&opt=GO
where ra is Right Ascension in degrees, dec is Declination in degrees, height and width are in pixels,
scale is the scale of the image in arcsec per pixel, 0.4 is default
opt is a string of characters, as listed above for the cutout service.
Navigate
This page, built from the Cutout service provides easy navigation in the vicinity
of a given point on the sky. One can move around by clicking on the frame of the image,
or on individual objects. A short list of the basic properties and a magnified thumbnail \
image of the object nearest to the selected point is then displayed.
You may jump directly to a particular location with the navigation tool using:
http://cas.sdss.org/dr16/en/tools/chart/navi.aspx?ra=184.9511&dec=-0.8754&scale=0.4&opt=GO
where ra is Right Ascension in degrees, dec is declination in degrees,
scale is the scale of the image in arcsec per pixel, 0.4 is default
opt is a string of characters, as seen above.
Image List
This page, built from the Cutout service, can generate thumbnails of SDSS images based upon a
user defined list of object positions. The images are linked to the
other tools. The list can also be specified with a query. The page can be called via HTTP POST.
You will need a form such as the following :
<form action="http://cas.sdss.org/dr16/en/tools/chart/list.aspx"
method="post">
<TEXTAREA name="paste">
ra dec
159.815 -0.655
161.051 0.152
161.739 0.893
164.090 -0.889
</TEXTAREA>
<input type="submit">
</form>
Basically you must post to the server a field called "paste" which contains the list of thumbnails you require.
Explore
The Explore Tool contains a summary of an object, and interactive
links to further detailed properties, like its spectrum or neighbors, etc.
http://cas.sdss.org/dr16/en/tools/explore/obj.aspx?id=1237654386268439267
where id is the objId, or
http://cas.sdss.org/dr16/en/tools/explore/obj.aspx?ra=180.6&dec=0.2
where ra is Right Ascension in degrees, dec is declination in degrees, or
http://cas.sdss.org/dr16/en/tools/explore/obj.aspx?sid=299492151346096128
where sid is the SpecObjId, or
http://cas.sdss.org/dr16/en/tools/explore/obj.aspx?mjd=51630&plate=266&fiber=100
where mjd is the modified julian date, plate is the plate and fiber is the fiberid.
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