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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

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127 results found.

  1. LIGO/Virgo S190814bv: VLA 6 GHz observations of 75 galaxies in the 90% localization region
  2. LIGO/Virgo S190814bv: Chandra X-ray non-detection of ASKAP J005547-270433 / AT2019osy
  3. LIGO/Virgo S190814bv: HST and ALMA observations of the host galaxy of ASKAP J005547-270433 / AT 2019osy
  4. LIGO/Virgo S190814bv: SOAR spectroscopy of AT2019nte host galaxy
  5. LIGO/Virgo S190814bv: No counterpart candidate after completion of GRAWITA VST-ESO PARANAL transient survey.
  6. LIGO/Virgo S190814bv: ATCA monitoring of ASKAP J005547-270433/AT2019osy
  7. LIGO/Virgo S190814bv: VLA/JAGWAR monitoring of the 50% containment region
  8. LIGO/Virgo S190814bv: GRAWITA VST-ESO PARANAL observations and independent transient candidates discovery.
  9. LIGO/Virgo S190814bv: ATCA observation of ASKAP J005547-270433/AT2019osy
  10. LIGO/Virgo S190814bv : No significant candidates in TAROT-GRANDMA observations
  11. LIGO/Virgo S190814bv: LCO Photometry of desgw-190814f/AT2019nte
  12. LIGO/Virgo S190814bv: SOAR spectroscopy of DECam candidate AT2019ntp
  13. LIGO/Virgo S190814bv: AT2019odc and AT2019omt 10.4m GTC spectroscopy
  14. LIGO/Virgo S190814bv: AT2019nqc and AT2019nqz 10.4m GTC spectroscopy
  15. LIGO/Virgo S190814bv: Upper limits from a two-week IceCube search for neutrinos from the direction of ASKAP J005547-270433
  16. LIGO/Virgo S190814bv: Swift observation of ASKAP J005547-270433/AT2019osy
  17. LIGO/Virgo S190814bv: AT2019nxe and AT2019obc 10.4m GTC spectroscopy
  18. LIGO/Virgo S190814bv: SOAR spectroscopy of DECam candidates AT2019ntr and AT2019omx
  19. LIGO/Virgo S190814bv: VLA observation of ASKAP J005547-270433/AT2019osy
  20. LIGO/Virgo S190814bv: no variation of DESGW candidates AT 2019onj and AT 2019okr from ENGRAVE VLT/HAWK-I observations, and archival detection
  21. LIGO/Virgo S190814bv: Swift UVOT - no new counterpart candidates identified
  22. LIGO/Virgo S190814bv: Correction of ASKAP coordinates
  23. LIGO/Virgo S190814bv: DESGW non-detection of AT2019osy/ASKAP 005547-270433
  24. LIGO/Virgo S190814bv: Palomar 200-in spectroscopic redshift and host galaxy properties of ASKAP source AT2019osy
  25. LIGO/Virgo S190814bv: Optical non-detection of radio source AT2019osy from CFHT
  26. LIGO/Virgo S190814bv: DECam-GROWTH detection of an optical counterpart to the radio source AT2019osy
  27. LIGO/Virgo S190814bv: Detection of a candidate radio counterpart with ASKAP
  28. LIGO/Virgo S190814bv: Final list of candidates from the DESGW coadd analysis from the week long search campaign
  29. LIGO/Virgo S190814bv: CFHTphotometryof AT2019npv
  30. LIGO/Virgo S190814bv: SOAR spectroscopy of DECam candidates AT2019npw and AT2019num
  31. LIGO/Virgo S190814bv : Magellan IMACS Spectrum of AT2019npv classified as a Type Ib supernova
  32. LIGO/Virgo S190814bv: SALT optical spectrum of candidate DG19aqbkc
  33. LIGO/Virgo S190814bv: Radio non-detection of DG19wxnjc/AT2019npv with the VLA
  34. LIGO/Virgo S190814bv: Keck II NIRES classification of DG19wxnjc/AT2019npv as a stripped envelope supernova
  35. LIGO/Virgo S190814bv: LCO Photometry of DG19wxnjc/AT2019npv
  36. LIGO/Virgo S190814bv: MASTER prediscovery and postdiscovery observations DECam candidate DG19wxnjc/AT2019npv field
  37. LIGO/Virgo S190814bv: No radio counterpart to DG19wxnjc/AT2019npv in ASKAP observations
  38. LIGO/Virgo S190814bv: Archival detection of DG19wxnjc/AT2019npv in DES data
  39. LIGO/Virgo S190814bv: Keck NIRES spectroscopy of DG19wxnjc/AT2019npv
  40. LIGO/Virgo S190814bv: Photometric Evolution of DECAM candidates
  41. LIGO/Virgo S190814bv: DESGW photometry of AT2019npv
  42. LIGO/Virgo S190814bv: GROND follow-up observations of AT2019npv
  43. LIGO/Virgo S190814bv: Further Pan-STARRS z-band observations and AT2019npv photometry
  44. LIGO/Virgo S190814bv: WHT spectroscopy of the host of AT2019npv
  45. LIGO/Virgo S190814bv: NIR imaging follow-up of ASKAP transient
  46. LIGO/Virgo S190814bv: ENGRAVE VLT/HAWK-I observations and archival detection of the CFHT candidate
  47. LIGO/Virgo S190814bv: No radio counterpart detected in ASKAP observations
  48. LIGO/Virgo S190814bv: a potential faint optical counterpart in CFHT imaging
  49. LIGO/Virgo S190814bv: new candidate from DESGW
  50. LIGO/Virgo S190814bv: No Optical Counterpart Candidates in Second-Epoch Lick/KAIT Observations
  51. LIGO/Virgo S190814bv: further candidates from DESGW
  52. LIGO/Virgo S190814bv: SOAR spectroscopy of AT2019noq and AT2019ntn
  53. LIGO/Virgo S190814bv: No Counterpart Candidates in Las Cumbres Observatory Galaxy Targeted Search
  54. LIGO/Virgo S190814bv: AT2019nqq 10.4m GTC spectroscopy
  55. LIGO/Virgo S190814bv: Further Pan-STARRS observations and transient sources
  56. LIGO/Virgo S190814bv: RATIR Optical observations of DECam transients
  57. LIGO/Virgo S190814bv: No neutrino candidates at Pierre Auger Observatory
  58. LIGO/Virgo S190814bv: GRAWITA TNG NIR imaging of AT2019nqq and AT2019nqc
  59. LIGO/Virgo S190814bv: No strong counterpart candidates in Swift/XRT observations
  60. LIGO/Virgo S190814bv: DESGW candidate update
  61. LIGO/Virgo S190814bv: No candidates from image subtraction in DCT galaxy targeted search
  62. LIGO/Virgo S190814bv: WIRC NIR imaging follow-up of DECam transients
  63. LIGO/Virgo S190814bv: Keck/MOSFIRE NIR spectroscopy of DG19njmjc (= AT 2019nra)
  64. LIGO/Virgo S190814bv: DG19dnjlc is not offset from its host galaxy
  65. LIGO/Virgo S190814bv: Additional candidates identified in DECam images by the DECam-GROWTH team
  66. LIGO/VIRGO S190814bv: AbAO non-detection of AT2019nme
  67. LIGO/Virgo S190814bv: Prioritization of Counterpart Candidates based on a Photometric Redshift Analysis by the DECam-GROWTH Team
  68. LIGO/Virgo S190814bv: Not observable by CALET
  69. LIGO/Virgo S190814bv: No candidates found in J-GEM follow-up observations
  70. LIGO/Virgo S190814bv: Pan-STARRS imaging indicates DG19sevhc (AT2019npy) is a proper motion star
  71. LIGO/Virgo S190814bv: Fermi-LAT search for a high-energy gamma-ray counterpart
  72. LIGO/Virgo S190814bv : ENGRAVE X-shooter spectra of AT2019nqs and AT2019npy
  73. LIGO/Virgo S190814bv: GRAWITA TNG infrared imaging of desgw-190814e, DG19sevhc and selected galaxies
  74. LIGO/Virgo S190814bv : No Counterpart Candidates in Continued Galaxy Targeted Search with Magellan
  75. LIGO/Virgo S190814bv: No additional candidates from the Zwicky Transient Facility
  76. LIGO/Virgo S190814bv: SOAR spectroscopy of 2 DESGW candidates
  77. LIGO/Virgo S190814bv: No candidates found in J-GEM follow-up observations
  78. LIGO/Virgo S190814bv: no candidates from optical imaging of selected galaxies at the NOT
  79. LIGO/VIRGO S190814bv: No candidates from ATLAS observations
  80. LIGO/Virgo S190814bv: No candidates from DCT galaxy targeted search and observations of DECam-GROWTH candidates
  81. LIGO/Virgo S190814bv: New candidates from DECam DESGW difference imaging search
  82. LIGO/Virgo S190814bv: GROND imaging of candidate galaxies
  83. SUBJECT: LIGO/Virgo S190814bv: GRAWITA VST-ESO PARANAL observations
  84. S190814bv: MASTER analysis of DECam-GROWTH candidates
  85. LIGO/Virgo S190814bv: Konus-Wind observations
  86. LIGO/Virgo S190814bv : No Counterpart Candidates in Galaxy Targeted Search with Magellan
  87. LIGO/Virgo S190814bv: Upper limits from Insight-HXMT/HE observations
  88. LIGO/Virgo S190814bv: Candidates identified in DECam images by the DECam-GROWTH team
  89. LIGO/Virgo S190814bv: GRAWITA TNG infrared imaging of selected galaxies
  90. LIGO/Virgo S190814bv: No candidates identified in DECam data by visual inspection
  91. LIGO/Virgo S190814bv: No Counterpart Candidates in Las Cumbres Observatory Galaxy Targeted Search
  92. LIGO/Virgo S190814bv: No Candidates Found in Wide-Field Infrared Search with Palomar Gattini-IR
  93. LIGO/VIRGO S190814bv: No candidates from Pan-STARRS and non-detection of AT2019nme
  94. LIGO/Virgo S190814bv: des-gw190814b is a moving object
  95. LIGO/Virgo S190814bv Global MASTER-Net observations report
  96. LIGO/Virgo S190814bv: No counterpart candidates in KAIT observations
  97. LIGO/Virgo S190814bv: No Counterparts in DDOTI/OAN Optical Observations
  98. LIGO/Virgo S190814bv: no counterpart candidates in Thacher imaging
  99. LIGO/Virgo S190814bv: no counterpart candidates in Swope imaging
  100. LIGO/Virgo S190814bv: No counterpart candidates in TOROS observations

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