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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

5530 results found.

  1. GRB110801A: MITSuME Ishigakijima Optical Observation
  2. AXP 4U 0142+61: Fermi GBM detection
  3. AXP 4U 0142+61: Swift-BAT refined analysis
  4. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  5. GRB 110726A: Swift detection of a burst
  6. Fermi Gamma-ray Burst Monitor trigger 332078586 is not a GRB
  7. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  8. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  9. GRB 110705A: Suzaku WAM observation of the prompt emission
  10. Konus-Wind observation of GRB 110705A
  11. GRB 110705A: Fermi GBM detection
  12. GRB 110625A: GROND detection of a source inside the XRT error circle
  13. GRB110530A: MITSuME Okayama Optical Observation
  14. GRB 110503A: R-band Detection
  15. GRB 110420A: Swift detection of a burst with optical counterpart
  16. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  17. GRB 110407A: MASTER optical observations
  18. GRB 110407A: GROND Detection of the Optical Afterglow
  19. Konus-Wind observation of GRB 110406A
  20. GRB 110328A / Swift J164449.3+573451, HST Observations
  21. GRB 110328A: Konkoly observations.
  22. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  23. GRB 110328/Swift J164449.3+573451: Fermi observations
  24. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  25. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  26. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  27. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  28. GRB 110213A, the review of the sky area in plate archives
  29. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  30. GRB 110319B Swift-XRT afterglow confirmation
  31. GRB 110319B: Swift-XRT afterglow candidate.
  32. GRB 110319B found in ground analysis of Swift-BAT data
  33. GRB 110315A: RTT150 optical observations
  34. GRB 110315A: MASTER early optical observations
  35. GRB110312A: MITSuME Okayama Optical upper limits
  36. GRB110305A: MITSuME Ishigakijima Optical upper limits
  37. GRB 110223A: optical upper limits
  38. GRB 110223A: Liverpool Telescope observations
  39. GRB 110223A: Swift detection of a burst
  40. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  41. GRB 110128A: Swift/UVOT observations
  42. GRB 110128A: WHT redshifts of nearby field galaxies
  43. GRB 110128A: Enhanced Swift-XRT position
  44. GRB 110128A: Afterglow detection from NOT
  45. GRB 110128A: Swift detection of a burst
  46. GRB 101224A, the review of the sky area in plate archives
  47. GRB 110120A: Fermi GBM detection
  48. GRB 110106B: MASTER optical observations
  49. Trigger 441015 / GRB 101225A: Further NOT optical observation
  50. GRB 101224A - UVOT-enhanced XRT position
  51. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  52. GRB 101219A: GROND Upper limits
  53. GRB 101219A: Magellan NIR observations
  54. GRB 101023A: miniTAO/ANIR NIR detection
  55. GGRB 101023A: GROND detection of the optical-NIR afterglow
  56. GRB 101008A: optical observations
  57. GRB 100902A: D50 optical limit
  58. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  59. GRB 101008A: Swift-BAT refined analysis
  60. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  61. GRB 101008A: Swift detection of a burst
  62. GRB 100924A: Suzaku WAM observation of the prompt emission
  63. GRB 100924A: Fermi GBM observation
  64. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  65. GRB 100924A: Swift detection of a burst
  66. GRB 100917A: Swift detection of a burst
  67. GRB 100906A: GRAS-007 optical observations
  68. GRB 100906A: Observations at the Virtual Telescope
  69. GRB 100906A : Faulkes Telescope North optical observations
  70. Optical observations of GRB 100901A
  71. GRB 100902A: GROND observations; afterglow candidate
  72. GRB100902A: Optical upper limits at IAO
  73. GRB10901A: Optical observations at IAO
  74. GRB 100901A: Lightbuckets Optical Observations
  75. GRB 100902A: optical observation at Mt.Terskol
  76. GRB 100901A: optical observation at Mt.Terskol
  77. GRB 100829.9: MASTER Optical Limits
  78. GRB 100814A: Suzaku WAM observation of the prompt emission
  79. Konus-Wind observation of GRB 100814A
  80. GRB 100816A: MASTER Optical Limits
  81. GRB100816A: TNG optical afterglow confirmation.
  82. GRB 100814A: Fermi GBM observation
  83. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  84. GRB 100814A: Swift UVOT observations of the optical afterglow
  85. GRB 100814A: Swift detection of a burst with an optical afterglow
  86. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  87. Swift-BAT trigger 431582 likely is IGR J17464-2811
  88. GRB100807A: optical observation in CrAO
  89. GRB 100807A: P60 Optical Afterglow Discovery
  90. GRB 100719A: Swift detection of a burst
  91. GRB 100628A: Near-IR sources coincident with the possible X-ray afterglow
  92. GRB 100628A: Chandra observations
  93. GRB 100628A: Swift XRT/UVOT refined analysis
  94. Konus-Wind observation of GRB 100704A
  95. GRB 100704A: Fermi GBM observation
  96. GRB 100704A: Swift detection of a burst
  97. GRB 100615A: Additional Gemini/NIRI observations
  98. GRB 100701B: Fermi GBM detection
  99. GRB 100702A: Swift detection of a short burst
  100. GRB 100213B: Detection of Fading Optical Afterglow

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