The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0

The All-Sky Automated Survey for Supernovae (ASAS-SN) is working toward imaging the entire visible sky every night to a depth of V ∼ 17 mag. The present data covers the sky and spans ∼2–5 years with ∼100–400 epochs of observation. The data should contain some ∼1 million variable sources, and the ultimate goal is to have a database of these observations publicly accessible. We describe here a first step, a simple but unprecedented web interface https://asas-sn.osu.edu/ that provides an up to date aperture photometry light curve for any user-selected sky coordinate. The V band photometry is obtained using a two-pixel (16.″0) radius aperture and is calibrated against the APASS catalog. Because the light curves are produced in real time, this web tool is relatively slow and can only be used for small samples of objects. However, it also imposes no selection bias on the part of the ASAS-SN team, allowing the user to obtain a light curve for any point on the celestial sphere. We present the tool, describe its capabilities, limitations, and known issues, and provide a few illustrative examples.

[1]  J. Prieto,et al.  The Ultraviolet Spectroscopic Evolution of the Low-Luminosity Tidal Disruption Event iPTF16fnl , 2017, 1704.02321.

[2]  J. Pepper,et al.  A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass–Radius Relationship for M Dwarfs , 2017, 1706.02401.

[3]  David J Armstrong,et al.  Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry , 2017, Monthly Notices of the Royal Astronomical Society.

[4]  Konstantin Grankin,et al.  Placing the Spotted T Tauri Star LkCa 4 on an HR Diagram , 2017, 1701.06703.

[5]  Samson A. Johnson,et al.  The Mysterious Dimmings of the T Tauri Star V1334 Tau , 2017, 1701.03044.

[6]  D. Bersier,et al.  The ASAS-SN Bright Supernova Catalog – II. 2015 , 2016, 1704.02320.

[7]  J. Prieto,et al.  The unexpected, long-lasting, UV rebrightening of the superluminous supernova ASASSN-15lh , 2016, 1605.00645.

[8]  A. B. Danilet,et al.  The ASAS-SN bright supernova catalogue – I. 2013–2014 , 2016, 1604.00396.

[9]  R. Davé,et al.  Cold gas stripping in satellite galaxies: from pairs to clusters , 2016, 1611.00896.

[10]  L. Abe,et al.  RETURN OF THE KING: TIME-SERIES PHOTOMETRY OF FO AQUARII’S INITIAL RECOVERY FROM ITS UNPRECEDENTED 2016 LOW STATE , 2016, 1609.01026.

[11]  J. Prieto,et al.  DM ORI: A YOUNG STAR OCCULTED BY A DISTURBANCE IN ITS PROTOPLANETARY DISK , 2016, 1607.07455.

[12]  Michael Connelley,et al.  THE ERUPTION OF THE CANDIDATE YOUNG STAR ASASSN-15QI , 2016, 1607.06368.

[13]  J. Prieto,et al.  ASASSN-16ae: A POWERFUL WHITE-LIGHT FLARE ON AN EARLY-L DWARF , 2016, 1605.04313.

[14]  J. Prieto,et al.  Hello darkness my old friend: the fading of the nearby TDE ASASSN-14ae , 2016, 1604.06093.

[15]  J. Prieto,et al.  ASASSN-15oi: a rapidly evolving, luminous tidal disruption event at 216 Mpc , 2016, 1602.01088.

[16]  D. Bersier,et al.  ASASSN-15lh: A highly super-luminous supernova , 2015, Science.

[17]  A. B. Danilet,et al.  Six months of multiwavelength follow-up of the tidal disruption candidate asassn-14li and implied tde rates from asas-sn , 2015, 1507.01598.

[18]  S. Djorgovski,et al.  GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE , 2015, 1512.04434.

[19]  P. Hall,et al.  SPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT. I. ULTRAVIOLET OBSERVATIONS OF THE SEYFERT 1 GALAXY NGC 5548 WITH THE COSMIC ORIGINS SPECTROGRAPH ON HUBBLE SPACE TELESCOPE , 2015, 1501.05954.

[20]  N. Morrell,et al.  Discovery of a Thorne-Żytkow object candidate in the Small Magellanic Cloud , 2014, Proceedings of the International Astronomical Union.

[21]  J. Prieto,et al.  ASASSN-14ae: a tidal disruption event at 200 Mpc , 2014, 1405.1417.

[22]  J. Prieto,et al.  DISCOVERY AND OBSERVATIONS OF ASASSN-13db, AN EX LUPI-TYPE ACCRETION EVENT ON A LOW-MASS T TAURI STAR , 2014, 1401.3335.

[23]  J. Prieto,et al.  CHARACTERIZING A DRAMATIC ΔV ∼ −9 FLARE ON AN ULTRACOOL DWARF FOUND BY THE ASAS-SN SURVEY , 2013, 1310.4515.

[24]  J. Prieto,et al.  THE MAN BEHIND THE CURTAIN: X-RAYS DRIVE THE UV THROUGH NIR VARIABILITY IN THE 2013 ACTIVE GALACTIC NUCLEUS OUTBURST IN NGC 2617 , 2013, 1310.2241.

[25]  S. Roweis,et al.  ASTROMETRY.NET: BLIND ASTROMETRIC CALIBRATION OF ARBITRARY ASTRONOMICAL IMAGES , 2009, 0910.2233.

[26]  Ernest E. Croner,et al.  The Palomar Transient Factory: System Overview, Performance, and First Results , 2009, 0906.5350.

[27]  A. J. Drake,et al.  FIRST RESULTS FROM THE CATALINA REAL-TIME TRANSIENT SURVEY , 2008, 0809.1394.

[28]  P. S. Bunclark,et al.  Astronomical Data Analysis Software and Systems , 2008 .

[29]  Zeljko Ivezic,et al.  Sloan Digital Sky Survey Standard Star Catalog for Stripe 82: The Dawn of Industrial 1% Optical Photometry , 2007, astro-ph/0703157.

[30]  Brinkmann,et al.  SDSS Standard Star Catalog for Stripe 82: the Dawn of Industrial 1% Optical Photometry , 2007 .

[31]  K. Stanek,et al.  WR 20a Is an Eclipsing Binary: Accurate Determination of Parameters for an Extremely Massive Wolf-Rayet System , 2004, astro-ph/0405338.

[32]  K. E. McGowan,et al.  Northern Sky Variability Survey: Public Data Release , 2004, astro-ph/0401217.

[33]  B. Paczyński.  Monitoring All Sky for Variability , 2000, astro-ph/0005284.

[34]  Mireille Louys,et al.  The ALADIN interactive sky atlas - A reference tool for identification of astronomical sources , 2000 .

[35]  Supriya Chakrabarti,et al.  Astronomical data analysis from remote sites , 1988 .