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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"

28293 results found.

  1. GRB 130527A: Swift detection of a bright burst
  2. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  3. Swift Trigger 556533 is not an astrophysical event
  4. GRB 130521B: Suzaku WAM observation of the prompt emission
  5. Swift Trigger 556533 is probably not an astrophysical event
  6. GRB 130521A: Skynet/PROMPT observations
  7. GRB 130521A, Swift-BAT refined analysis
  8. GRB 130521A: TAROT La Silla observatory optical observations
  9. GRB 130515A: Suzaku WAM observation of the prompt emission
  10. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  11. GRB 130518A: Continued RATIR Optical Observations - Fading
  12. GRB 130518A: Confirmation of the X-ray afterglow.
  13. GRB 130518A: RATIR Optical and NIR Observations
  14. GRB 130518A: Swift XRT and UVOT possible afterglow
  15. GRB 130518A: Fermi GBM detection
  16. VLT observations of GRB 130427A
  17. GRB 130427A: Konkoly optical observations
  18. GRB 130515A: IRSF NIR Observation
  19. GRB 130515A: Further Gemini Observations
  20. Konus-Wind observation of GRB 130515A
  21. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  22. GRB 130514B: RATIR Optical and NIR Observations
  23. GRB 130427A: Skynet detections of a possible supernova
  24. GRB 130515A: Swift-XRT refined Analysis
  25. GRB 130515A: Swift/UVOT Upper Limits
  26. GRB 130514B Swift-BAT observations
  27. GRB 130515A: Swift-BAT refined analysis
  28. GRB 130514B: GROND observations
  29. GRB 130515A: Gemini/GMOS Observations
  30. GRB 130515A: GROND Observations
  31. GRB 130515A: Enhanced Swift-XRT position
  32. GRB 130515A: VLT acquisition observation
  33. GRB 130511A: SSO 2.3m observation
  34. GRB 130514B: Swift-XRT Observations
  35. GRB 130515A: Swift detection of a short burst
  36. GRB 130514A: Swift-XRT refined Analysis
  37. GRB 130514A: Skynet/PROMPT/DSO Detections
  38. GRB 130513A: Bassano Bresciano optical upper limit
  39. GRB 130514A: RATIR Optical and NIR Observations
  40. GRB 130513A: RATIR Optical and NIR Observations
  41. GRB 130513A: Swift/UVOT Upper Limits
  42. GRB 130514A: Swift/UVOT Upper Limits
  43. GRB 130513A: GROND observations
  44. GRB 130514B: a long GRB detected by INTEGRAL
  45. GRB 130514A: Enhanced Swift-XRT position
  46. GRB 130514A: Swift-BAT refined analysis
  47. GRB 130513A: Swift-XRT detection of the afterglow.
  48. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  49. GRB 130514A: P60 Observations
  50. GRB 130514A: Swift detection of a burst
  51. GRB 130513A: a long GRB detected by INTEGRAL
  52. GRB 130511A: Swift-XRT refined Analysis
  53. GRB 130511A: MITSuME Okayama upper limits
  54. GRB 130511A, Swift-BAT refined analysis
  55. GRB 130511A: Upper limit by Xinglong TNT optical observation
  56. GRB 130511A: Enhanced Swift-XRT position
  57. GRB 130511A: Swift detection of a burst with an optical counterpart
  58. GRB 130508A: Swift/UVOT Upper Limits
  59. GRB 130508A: MITSuME Akeno upper limits
  60. GRB 130508A: RATIR Optical and NIR Observations
  61. GRB 130427A: Keck/LRIS Observations
  62. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  63. GRB 130508A, Swift-BAT refined analysis
  64. GRB 130508A: MITSuME Okayama upper limits
  65. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  66. GRB130508A: BOOTES-3 optical limit
  67. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  68. GRB 130508A: Swift detection of a probable burst
  69. GRB 130427A: Continued RATIR Optical and NIR Observations
  70. GRB 130505B: Further Swift observations
  71. GRB 130504C: Suzaku WAM observation of the prompt emission
  72. GRB 130504B: Suzaku WAM observation of the prompt emission
  73. GRB 130505A: Suzaku WAM observation of the prompt emission
  74. GRB 130427A, Watcher afterglow detection
  75. GRB 130427A: Amateur observations from Sweden
  76. GRB 130505A: RATIR Optical and NIR Observations
  77. GRB 130505B: Swift Candidate Afterglow
  78. GRB 130427A: RHESSI observations
  79. GRB 130505A, Swift-BAT refined analysis
  80. GRB 130504C: further Swift-XRT observations
  81. GRB 130504C: Fermi GBM detection
  82. GRB 130502A: optical upper limit
  83. GRB 130505A: Swift-XRT refined Analysis
  84. GRB 130505A: Largest E_iso ever measured
  85. Konus-Wind observation of GRB 130505A
  86. GRB 130504C: Fermi-LAT detection of a burst
  87. Swift/UVOT observations of GRB130505A
  88. GRB 130505A: Xinglong TNT optical observations
  89. GRB 130505A; Weihai optical observations
  90. GRB 130505A: Enhanced Swift-XRT position
  91. GRB 130505A: MITSuME Okayama Optical Observation
  92. GRB 130504A: IAC80 optical candidate
  93. GRB 130505A: Swift detection of a burst with optical afterglow
  94. GRB 130504A: MITSuME Okayama upper limits
  95. IPN Triangulation of GRB 130504B
  96. GRB 130504B: Fermi GBM detection
  97. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  98. GRB 130504A: Enhanced XRT position
  99. GRB 130502B: Suzaku WAM observation of the prompt emission
  100. GRB 130504A: Swift/UVOT Upper Limits

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