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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"

28266 results found.

  1. GRB 130514B: GROND observations
  2. GRB 130515A: Gemini/GMOS Observations
  3. GRB 130515A: GROND Observations
  4. GRB 130515A: Enhanced Swift-XRT position
  5. GRB 130515A: VLT acquisition observation
  6. GRB 130511A: SSO 2.3m observation
  7. GRB 130514B: Swift-XRT Observations
  8. GRB 130515A: Swift detection of a short burst
  9. GRB 130514A: Swift-XRT refined Analysis
  10. GRB 130514A: Skynet/PROMPT/DSO Detections
  11. GRB 130513A: Bassano Bresciano optical upper limit
  12. GRB 130514A: RATIR Optical and NIR Observations
  13. GRB 130513A: RATIR Optical and NIR Observations
  14. GRB 130513A: Swift/UVOT Upper Limits
  15. GRB 130514A: Swift/UVOT Upper Limits
  16. GRB 130513A: GROND observations
  17. GRB 130514B: a long GRB detected by INTEGRAL
  18. GRB 130514A: Enhanced Swift-XRT position
  19. GRB 130514A: Swift-BAT refined analysis
  20. GRB 130513A: Swift-XRT detection of the afterglow.
  21. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  22. GRB 130514A: P60 Observations
  23. GRB 130514A: Swift detection of a burst
  24. GRB 130513A: a long GRB detected by INTEGRAL
  25. GRB 130511A: Swift-XRT refined Analysis
  26. GRB 130511A: MITSuME Okayama upper limits
  27. GRB 130511A, Swift-BAT refined analysis
  28. GRB 130511A: Upper limit by Xinglong TNT optical observation
  29. GRB 130511A: Enhanced Swift-XRT position
  30. GRB 130511A: Swift detection of a burst with an optical counterpart
  31. GRB 130508A: Swift/UVOT Upper Limits
  32. GRB 130508A: MITSuME Akeno upper limits
  33. GRB 130508A: RATIR Optical and NIR Observations
  34. GRB 130427A: Keck/LRIS Observations
  35. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  36. GRB 130508A, Swift-BAT refined analysis
  37. GRB 130508A: MITSuME Okayama upper limits
  38. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  39. GRB130508A: BOOTES-3 optical limit
  40. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  41. GRB 130508A: Swift detection of a probable burst
  42. GRB 130427A: Continued RATIR Optical and NIR Observations
  43. GRB 130505B: Further Swift observations
  44. GRB 130504C: Suzaku WAM observation of the prompt emission
  45. GRB 130504B: Suzaku WAM observation of the prompt emission
  46. GRB 130505A: Suzaku WAM observation of the prompt emission
  47. GRB 130427A, Watcher afterglow detection
  48. GRB 130427A: Amateur observations from Sweden
  49. GRB 130505A: RATIR Optical and NIR Observations
  50. GRB 130505B: Swift Candidate Afterglow
  51. GRB 130427A: RHESSI observations
  52. GRB 130505A, Swift-BAT refined analysis
  53. GRB 130504C: further Swift-XRT observations
  54. GRB 130504C: Fermi GBM detection
  55. GRB 130502A: optical upper limit
  56. GRB 130505A: Swift-XRT refined Analysis
  57. GRB 130505A: Largest E_iso ever measured
  58. Konus-Wind observation of GRB 130505A
  59. GRB 130504C: Fermi-LAT detection of a burst
  60. Swift/UVOT observations of GRB130505A
  61. GRB 130505A: Xinglong TNT optical observations
  62. GRB 130505A; Weihai optical observations
  63. GRB 130505A: Enhanced Swift-XRT position
  64. GRB 130505A: MITSuME Okayama Optical Observation
  65. GRB 130504A: IAC80 optical candidate
  66. GRB 130505A: Swift detection of a burst with optical afterglow
  67. GRB 130504A: MITSuME Okayama upper limits
  68. IPN Triangulation of GRB 130504B
  69. GRB 130504B: Fermi GBM detection
  70. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  71. GRB 130504A: Enhanced XRT position
  72. GRB 130502B: Suzaku WAM observation of the prompt emission
  73. GRB 130504A: Swift/UVOT Upper Limits
  74. GRB 130502B: Swift-XRT refined Analysis
  75. GRB 130504A, Swift-BAT refined analysis
  76. Swift-XRT X-ray afterglow candidate for GRB 130504A (BAT trigger 555096)
  77. GRB 130502B: possible TNG counterpart
  78. Trigger 555096: Swift detection of a possible burst
  79. GRB 130502A: Swift-BAT refined analysis
  80. GRB 130427A: Non-observation of VHE emission with HAWC
  81. GRB 130502A: Swift-XRT refined Analysis
  82. IPN Triangulation of GRB 130502B
  83. GRB 130502A: Fermi GBM detection
  84. GRB 130502B: Swift/UVOT Upper Limits
  85. GRB 130502A: Swift/UVOT Upper Limits
  86. GRB 130502B: P60 Observations
  87. GRB 130502B Swift-XRT observations
  88. GRB 130502A: RATIR Optical and NIR Observations
  89. GRB 130427A: Pan-STARRS 1 optical observations
  90. GRB 130418A: TNG NIR observations
  91. GRB 130502A: Enhanced Swift-XRT position
  92. GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days
  93. GRB 130502A: TNG candidate counterpart
  94. GRB 130502B: Fermi GBM detection of a burst
  95. GRB 130502A: T100 Observations
  96. GRB 130502A: Swift detection of a burst
  97. GRB 130427A: KAIT optical observations
  98. GRB 130425A: Suzaku WAM observation of the prompt emission
  99. GRB 130427A: High-energy neutrino search
  100. GRB 130427A: high energy gamma-ray detection by AGILE

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