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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.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').

810 results found.

  1. GRB 150608A: Swift-XRT follow-up observations
  2. Konus-Wind observation of GRB 150608A
  3. GRB 150608A: Swift-XRT afterglow detection
  4. GRB 150608A: Tiled Swift observations
  5. GRB 150608A: MAXI/GSC detection
  6. GRB 150518A: possible SN observations
  7. GRB 150518A: MAXI-GSC further analysis
  8. GRB 150518A: Mondy optical observations
  9. GRB 150518A: AMI 15 GHz detection of possible radio counterpart
  10. GRB 150518A: MASTER-net before, early and after optical stereoscopic observations with possible MP discovery inside MAXI error box
  11. Konus-Wind observation of GRB 150518A
  12. GRB 150518A: Swift-XRT follow-up observations
  13. GRB 150518A: Correction
  14. GRB 150518A: VLT/X-shooter redshift of the likely host galaxy
  15. Swift/UVOT observations of GRB150518A
  16. GRB 150518A: Swift-XRT afterglow detection
  17. GRB 150518A: Tiled Swift observations
  18. GRB 150518A: MAXI/GSC detection
  19. Konus-Wind observation of GRB 150430A
  20. GRB 150430A: Fermi GBM Detection
  21. GRB 150430A: MAXI/GSC detection
  22. GRB 150428C: Swift-XRT observations
  23. GRB 150428C: Tiled Swift observations
  24. GRB 150428C/MAXI J0400+678: MAXI/GSC detection
  25. GRB 150424B: Fermi GBM detection
  26. GRB 150424B: Tiled Swift observations
  27. GRB 150424B: MAXI/GSC detection
  28. Konus-Wind observation of GRB 150418A
  29. GRB150418A: Swift/UVOT did not detect a new source
  30. GRB 150418A: Swift-XRT observations
  31. GRB 150418A: Tiled Swift observations
  32. GRB 150418A: MAXI/GSC detection
  33. GRB 150413A: MAXI/GSC detection
  34. GRB 150313A: MAXI/GSC detection
  35. GRB 150311A: Konus-Wind trigger at 16:16:24 is not a GRB
  36. GRB 150311A: MAXI/GSC possible afterglow detection
  37. GRB 150222B: MAXI/GSC detection
  38. Konus-Wind observation of GRB 150206A
  39. Trigger 630047: Swift detection of 1RXS J180408.9-342058
  40. GRB 150206A: MAXI/GSC detection
  41. GRB 150123A: MASTER inspection
  42. Konus-Wind observation of GRB 150126A reveals its ultra-long nature
  43. GRB 150126A: Fermi GBM Detection
  44. GRB 150126A: MAXI/GSC afterglow candidate detection
  45. Konus-Wind observation of GRB 150123A
  46. GRB 150123A: Swift/UVOT observations
  47. GRB 150123A: Swift-XRT observations
  48. GRB 150123A Tiled Swift observations
  49. GRB 150123A: MAXI/GSC detection
  50. The Swift Detection of a Large Flare from the RS CVn Binary SZ Psc
  51. GRB 150110C: Swift/UVOT Upper Limits
  52. GRB 150110C: Swift-XRT observations
  53. GRB 150110A: MASTER inspection
  54. GRB 150110C Tiled Swift observations
  55. GRB 150110C: MAXI/GSC detection
  56. GRB 150110A: Fermi GBM Detection
  57. GRB 150110A: MAXI/GSC detection
  58. Konus-Wind observation of GRB 141229A
  59. GRB 141229A: Deep MASTER inspection
  60. GRB 141229A: Nanshan optical upper limit
  61. GRB 141229A: Swift-XRT observations
  62. GRB 141229A: Fermi GBM detection
  63. GRB 141229A: MAXI/GSC detection
  64. GRB 141121A: SPI-ACS/INTEGRAL observations
  65. Konus-Wind observation of GRB 141121A
  66. GRB 141121A: MAXI/GSC detection
  67. MAXI GRB 141029A is likely an X-ray flare from 1RXS J043657.1-161258
  68. GRB 141029A: Nanshan optical upper limit
  69. GRB 141029A Tiled Swift observations
  70. GRB 141029A: MAXI/GSC detection
  71. GRB 141020B: MAXI/GSC detection
  72. GRB 140930A/MAXI J2259+524: MASTER optical observations
  73. GRB 140928A: MAXI-GSC detection
  74. GRB 140930A/MAXI J2259+524: MAXI-GSC detection
  75. GRB 140903A: MAXI/GSC upper limit
  76. GRB 140818A: GROND confirmation of afterglow candidate
  77. Konus-Wind observation of GRB 140818A
  78. GRB 140818A - Fermi GBM Detection
  79. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  80. GRB 140818A: Correction to GCN 16702
  81. GRB 140818A Tiled Swift observations
  82. GRB 140818A: MAXI/GSC detection
  83. GRB 140814A: Swift-XRT and UVOT observations
  84. GRB 140814A: MASTER optical follow-up inspection
  85. GRB 140814A: Swift-XRT and UVOT observations
  86. GRB 140814A: MAXI/GSC detection
  87. Swift observations of a flare from UX Ari
  88. Swift trigger 601928 is V490 Cep: BAT+XRT refined analysis.
  89. GRB 140515B: MAXI/GSC detection
  90. GRB 140509B: MAXI/GSC detection
  91. MAXI ID=745548350 is UV Ceti
  92. GRB 140219A: Suzaku WAM observation of the prompt emission
  93. GRB 140219A: MAXI/GSC detection
  94. GRB 140221A: Results from Swift XRT tiled observations
  95. GRB 140221A Tiled Swift observations
  96. GRB 140221A: MAXI/GSC detection
  97. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  98. Konus-Wind observation of GRB 131215A
  99. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  100. Swift Trigger 584155 is MAXI J1421-613

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