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Alexei Pozanenko Space Research Institute (IKI)

This presentation discusses the structure and collaborations of the IKI Follow-up Network (IKI FuN) for transient events, focusing on observations of GRBs, TDEs, SNe, and LVC. It also explores the potential of GRB IKI FuN as an example for phase 1 of the BRICS transient network.

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Alexei Pozanenko Space Research Institute (IKI)

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  1. Observations and investigations of trnasients in Space Research Institute (IKI)[towards BRIC transient network] Alexei Pozanenko Space Research Institute (IKI) BRICS workshop, CBPF, October 1, 2019

  2. Outline • IKI Follow-up Network for transient events (aka GRB IKI FuN): structure and collaborations • Experience of the GRB IKI FuN • GRB, TDE, SNe, LVC observations • GRB IKI FuN as possible example for phase 1 of the BRICS transient. • Desired Transient Search Network Operation Mechanism and Equipment

  3. Shajn, 2.6m AZT-22, 1.5m AZT-33IK, 1.6m VT-40/500 (ISON) Zeiss-2000 Geography of GRB IKI FuN I (part) 2006 2001 2005 2003 2005 Assy AZT-20, 1.5m 2019

  4. IKI Follow-up Network for transient events (GRB IKI FuN): structure I • Non-dedicated for transientstelescopes (besides CDK-700, Assy-Turgen); total number of about 15 • Agreement with Observatories for transient observations • Dedicated time for ToO and scheduled time after open call requests • Apertures 0.7 – 2.6 m • Multicolor photometry (each telescope), polarimetry and spectroscopy (ZTSh 2.6m)

  5. IKI Follow-up Network for transient events (GRB IKI FuN): structure II • Total planning for transient in IKI • Automatic site/telescopes/observatories alerting • Manual scheduling (besides CDK 700) • Data reduction pipeline in IKI • Astrometry by APEX (proprietary) • Photometry by IRAF • Light curve combining from many observatories • LC modeling • Spectroscopy data interpretation jointly with SAO and University of North Carolina at Greensboro • Standalone papers for most interesting events • Wide collaboration papers for some other events • Most of observations are not used finally

  6. IKI Follow-up Network for transient events (GRB IKI FuN): structure III (under development) • Total planning for transient in IKI, e.g. mosaic planning for LVC , galaxy targets, dedicated OT candidates. • Automatic site/telescopes/observatories alerting • Data reduction pipeline in IKI • Astrometry by APEX (proprietary) • Photometry by IRAF • Light curve combining from many observatories • Spectroscopy data interpretation jointly with SAO and University of North Carolina at Greensboro • Standalone papers for most interesting events • Wide collaboration papers for some other events • Most of observations are not used finally –:( • But can be put in open data base

  7. IKI Follow-up Network for transient events ( GRB IKI FuN): collaborations • ISON (network, see talk by I. Molotov) • SAAO (BRICS cooperation, supported by a grant) • DOT 3.6 (India, cooperation, supported by a grant) • GTC, CAHA (collaboration) • Gemini, Keck (service observations in collaboration with worldwide teams) • Collaborating countries (Armenia, Georgia, Kazakhstan, Uzbekistan, Ukraine, Mongolia, Spain, South Africa, India)

  8. Experience of the GRB IKI FuNsince 2001 (GRB, TDE, SNe, LVC) • GRB more than 400 error box observations • GRB more than 100 positive detections • Incl. 030329, 080319A, 130427A, 190114C, 190829A • 17 SNe associated with GRB (two discovered by photometry) • Incl. 171205A, 181201A, 190114C, 190829A • Short GRBs follow up and optical detections • incl. GRB 130603B kilonova observation • 10+ host galaxies discovered and redshift determined • Several TDE follow up observations • O2-O3 LVC runs follow up • Incl. GW 170817 (Pozanenko+, ApJL 2018)

  9. During O2 Run of LIGO, jointly with Virgo detectorBNS coalescence was detected: GW 170817GBM/Fermi,SPI-ACS/INTEGRAL simultaneously detectedGRB 170817A Optical counterpart was found @ z= 0.0093

  10. The case of GRB170817 / GW170817 Aug 17 23:33 UT (tc+10.87 hr) – Swope (Las Campanas) Aug 17 23:50 UT – DLT40 (Cerro Tololo) Aug 17 23:55 UT – VISTA (ESO) Aug 17 23:59 UT – MASTER-OAFA (SAAO) Aug 18 00:15 UT – Las Cumbres Observatory (Cerro Tololo) Aug 18 00:42 UT – DECam (Cerro Tololo) Abbott et al. ApJ Letters, 848, L12, 2017

  11. Chronology Chilescope at IKI GW170817 and GRB 170817A GW170817 and GRB 170817A BSA/110MHz

  12. GRB IKI FuN OT of GW170717 (AT2017gfo) observations Host galaxy NGC 4993 Distance 40 Mpc OT in outskirt of the galaxy

  13. GRB IKI FuNGW170717 search for prompt radio BSA at 110MHz

  14. GRB IKI FuNis an example for phase 1 of the BRICS transient proposal(some initial conditions) • Predefined transients which should be searched/observed (GRB, LVC, TDE, TeV, neutrino(?), etc) • Predefined initial parameters of the transients after which should be triggered for follow-up • Targets for observation for every observatories • Calibration stars suitable for every observatory (e.g. secondary photometric standards)

  15. GRB IKI FuN is an example for phase 1 of the BRICS transient proposal(experience) • GRB IKI FuN deals with many various (not identical) telescopes • GRB IKI FuNcan be prototype of BRCIS transient network • GRB IKI FuN can be an immediate participant of the phase I of BRICS transient proposal

  16. Desired Transient Search Network: Operation Mechanism and facilities Mechanism and especially facilities are highly dependable from transient type! The following Scheme is suitable for all type of transients, and especially for detection of prompt optic of short GRB (associating with LIGO/Virgo BNS mergers)

  17. Desired Transient Search Network: Operation Mechanism and facilities Key requirements (1) Independent (not alerted) wide field survey with a time resolution of (at least) 1 s • FOV (maximal) = 4*π • FOV (minimal) = synchronized with FOV of space born telescopes, e.g. BAT/Swift , LVC region of maximal sensitivity , etc. (2) Real-time pipeline for transient detection (astrometry, photometry) (3) Transmission of detected transient coordinates to large-aperture telescopes for follow up observations (4) Real-time pipeline for data reduction (aim is a multicolor light curve) (5) Real-time classification of the transient based on machine learning of light curves

  18. Desired Transient Search Network: Operation Mechanism and facilities Required facilities Step 1 • Independent wide field survey of up to 16m @ 1 s (GRB) • Independent wide field survey of up to 19m @ 1 s (GRB of LVC) • Can be fulfilled by a farm of >20 cm aperture telescopes Step 2 • Alerted large aperture telescope for follow up transient detected at the step 1 • Can be fulfilled by 1-2m alerted telescope placed nearby with the farm and equipped by multicolor (r,i,z,J,H,K) imaging detectors (e.g. the GROUND type (Greiner +)

  19. Multimessenger Transients.Thank you for attention!

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