J/other/JAD/24.3 Optically Variable Quasars in AllWISE/PS1 (Usatov, 2018)
Optically Variable Quasars in the AllWISE and Pan-STARRS1 Data.
Usatov M.
<J. Astron. Data, 24, 3 (2018)>
=2018JAD....24....3U 2018JAD....24....3U (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Photometry, infrared ; Surveys
Keywords: catalogs - surveys
Description:
This catalog presents a sample of 229236 optically variable quasar
candidates identified in the AllWISE and Pan-STARRS1 data releases at
2-sigma and 3-sigma variability levels. Mid-IR bands (3.4, 4.6, 12 and
22um) are selected from the AllWISE data release, and 5 optical bands
(grizy) are from Pan-STARRS1. 127350 quasars are found to be variable
at the 3-sigma level.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 688 229236 Quasars data
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- PSOName Pan-STARRS Object Name
(PSO JDDD.ddddd+DD.ddddd)
25- 36 F12.8 deg RAdeg Pan-STARRS Mean Right Ascension (J2000)
38- 49 F12.8 deg DEdeg Pan-STARRS Mean Declination (J2000)
51- 70 F20.15 deg GLON Galactic Longitude
72- 91 F20.15 deg GLAT Galactic Latitude
93-112 F20.15 mag gmag ?=-999 Pan-STARRS g filter mean PSF magnitude
114-133 F20.15 mag bgmag ?=-999 Minimum of gmag detections
135-154 F20.15 mag Bgmag ?=-999 Maximum of gmag detections
156-175 E20.15 mag s_gmag ?=-999 Standard deviation of gMag detections
177-196 E20.15 mag e_gmag ?=-999 gmag Error
198-217 F20.15 mag rmag ?=-999 Pan-STARRS r filter mean PSF magnitude
219-238 F20.15 mag brmag ?=-999 Minimum of rmag detections
240-259 F20.15 mag Brmag ?=-999 Maximum of rmag detections
261-280 E20.15 mag s_rmag ?=-999 Standard deviation of rmag detections
282-301 E20.15 mag e_rmag ?=-999 rmag Error
303-322 F20.15 mag imag ?=-999 Pan-STARRS i filter mean PSF magnitude
324-343 F20.15 mag bimag ?=-999 Minimum of imag detections
345-364 F20.15 mag Bimag ?=-999 Maximum of imag detections
366-385 F20.15 mag s_imag ?=-999 Standard deviation of imag detections
387-406 E20.15 mag e_imag ?=-999 imag Error
408-427 F20.15 mag zmag ?=-999 Pan-STARRS z filter mean PSF magnitude
429-448 F20.15 mag bzmag ?=-999 Minimum of zmag detections
450-469 F20.15 mag Bzmag ?=-999 Maximum of zmag detections
471-490 E20.15 mag s_zmag ?=-999 Standard deviation of zmag detections
492-511 E20.15 mag e_zmag ?=-999 zmag Error
513-532 F20.15 mag ymag ?=-999 Pan-STARRS y filter mean PSF magnitude
534-553 F20.15 mag bymag ?=-999 Minimum of ymag detections
555-574 F20.15 mag Bymag ?=-999 Maximum of ymag detections
576-595 E20.15 mag s_ymag ?=-999 Standard deviation of ymag detections
597-616 E20.15 mag e_ymag ?=-999 ymag Error
618-628 F11.7 deg RAWdeg AllWISE Right Ascension (J2000)
630-640 F11.7 deg DEWdeg AllWISE Declination (J2000)
642-647 F6.3 mag W1mpro AllWISE W1 (3.4um) magnitude
649-654 F6.3 mag W2mpro AllWISE W2 (4.6um) magnitude
656-661 F6.3 mag W3mpro AllWISE W3 (12um) magnitude
663-668 F6.3 mag W4mpro AllWISE W4 (22um) mAgnitude
670-686 F17.15 arcsec Sep Separation between optical and IR sources
688 I1 --- TSigma [0,1] Variability Detection (1)
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Note (1): Variability Detection flag as follows:
0 = 2-sigma level
1 = 3-sigma level
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Acknowledgements:
Maxim Usatov, maxim.usatov(at)bcsatellite.net
(End) Maxim Usatov [CBU Research Institute], Patricia Vannier [CDS] 02-Jan-2019