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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"

26352 results found.

  1. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  2. GRB 110328A / Swift J164449.3+573451: Infrared transient
  3. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  4. GRB 110328A / Swift J164449.3+573451: Gemini and UKIRT IR observations
  5. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  6. GRB 110328A / Swift J164449.3+573451: beamed emission
  7. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  8. GRB 110328B: Fermi-LAT Detection
  9. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  10. GRB 110328B: Fermi GBM detection
  11. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  12. GRB 110328A: Enhanced Swift-XRT position
  13. GRB 110328A: Swift detection of a burst
  14. GRB110318B : MOA optical upper limit
  15. GRB 110319B BAT refined analysis
  16. GRB 110319B found in ground analysis of Swift-BAT data
  17. GRB 110319A: Swift/UVOT Detection
  18. GRB 110319A: Swift-BAT refined analysis
  19. GRB 110319A: Swift-XRT refined Analysis
  20. GRB 110319A: Enhanced Swift-XRT position
  21. GRB 110319A: Swift detection of a burst
  22. GRB 110318B: Swift-XRT refined Analysis
  23. GRB 110318A: Fermi GBM detection
  24. GRB 110318B: Swift-BAT refined analysis
  25. GRB 110318B: Enhanced Swift-XRT position
  26. GRB 110318A: Swift-BAT refined analysis
  27. GRB 110318B: Swift detection of a burst
  28. GRB 110318A: Swift detection of a burst
  29. GRB 110315A: RTT150 optical observations
  30. GRB 110315A: Swift-XRT refined Analysis
  31. GRB 110315A: Swift-BAT refined analysis
  32. GRB 110315A: Enhanced Swift-XRT position
  33. GRB 110315A: Swift detection of a burst
  34. GRB 110312A: RTT150 optical observations
  35. GRB 110312A: Swift-XRT refined Analysis
  36. GRB 110312A: Enhanced Swift-XRT position
  37. GRB 110312A: Swift-BAT refined analysis
  38. GRB 110312A: Swift detection of a burst
  39. GRB 110305A: Swift-XRT refined Analysis
  40. GRB 110305A: Enhanced Swift-XRT position
  41. GRB 110305A: Swift-BAT refined analysis
  42. GRB 110305A: GROND Detection of Optical Afterglow
  43. GRB 110305A: Swift detection of a burst
  44. GRB 110223A: optical upper limits
  45. GRB 110301A: Fermi GBM detection
  46. No IPN GRB detected in conjunction with candidate GRB 110215
  47. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  48. Swift/UVOT observations of GRB110223b
  49. GRB 110223A: Swift-BAT refined analysis
  50. GRB 110223A : early optical limit by "Pi of the Sky"
  51. GRB 110223A: Swift-XRT refined Analysis
  52. GRB 110223B: Swift-XRT refined Analysis
  53. GRB 110223A: Enhanced Swift-XRT position
  54. GRB 110223B: Enhanced Swift-XRT position
  55. GRB 110223B: Swift-BAT refined analysis
  56. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  57. GRB 110223B: Swift detection of a burst
  58. GRB 110223A: Swift detection of a burst
  59. GRB 110213B: Swift/UVOT observations
  60. GRB110213B: X-ray afterglow confirmation
  61. Fermi GBM detection of an SGR-like burst
  62. Swift XRT and UVOT Observations of OT 110215
  63. GRB 110213B: Gemini South Redshift
  64. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  65. GRB 110210A: ROVOR Upper Limit
  66. GRB 110213A: YNAO-GMG Observations
  67. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  68. GRB 110213A: Fermi GBM observation
  69. GRB 110205A: Konkoly optical observations
  70. GRB 110213B: Swift XRT observation
  71. Konus-Wind observation of GRB 110213A
  72. Konus-Wind observation of GRB 110213B
  73. GRB 110213A: Swift-XRT refined Analysis
  74. GRB 110213A: Swift/UVOT refined analysis
  75. GRB 110213A, Swift-BAT refined analysis
  76. GRB 110213A: Enhanced Swift-XRT position
  77. GRB 110213A: KAIT observations
  78. GRB 110213A: GRAS011 optical observations
  79. GRB 110213A: Swift detection of a burst with optical afterglow
  80. GRB 110212A: GRT Optical Observation
  81. GRB 110212A, Swift-BAT refined analysis
  82. GRB 110212A: Swift detection of a burst
  83. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  84. GRB 110207A: Suzaku WAM observation of the prompt emission
  85. GRB 110210A: Swift-XRT refined Analysis
  86. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  87. GRB 110210A: Swift-BAT refined analysis
  88. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  89. GRB 110210A: Enhanced Swift-XRT position
  90. GRB 110210A: Swift detection of a burst
  91. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  92. GRB 110208A: Magellan confirmation of the optical afterglow
  93. Fermi GBM detection of a burst from 1E 1841-045
  94. GRB 110205A: Suzaku WAM observation of the prompt emission
  95. GRB 110208A: Swift-XRT refined Analysis
  96. GRB 110208A: Enhanced Swift-XRT position
  97. GRB 110208A: Swift-BAT refined analysis
  98. GRB 110208A: Swift detection of a burst
  99. SGR-like outburst from the magnetar 1E 1841-04.5
  100. GRB 110205A: optical observations in Mondy observatory

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