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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"

5163 results found.

  1. GRB 081127: Swift-XRT refined analysis
  2. GRB 081126: Swift-XRT refined analysis
  3. GRB 081125: Fermi GBM detection
  4. GRB 081124: Fermi GBM detection
  5. GRB 081118: Fermi GBM detection.
  6. GRB 081122: Fermi GBM detection
  7. GRB 081121: GROND observations
  8. GRB 081118: Swift-XRT refined analysis
  9. GRB 081102: MASTER refind and final results
  10. GRB 081109B: Swift/UVOT refined analysis
  11. GRB 081109A: Swift-XRT refined analysis
  12. GRB 081024C: Fermi Gamma-ray Burst Monitor detection
  13. GRB 081104: refined XRT analysis
  14. Radio observation of GRB 080218b with ATCA
  15. GRB 081024B: BTA deep optical observations
  16. GRB081029: Swift XRT refined analysis
  17. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  18. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  19. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  20. Fermi-LAT observation of GRB 081024B
  21. GRB 081024: Faulkes Telescope North optical observations
  22. GRB 081022, Swift-BAT refined analysis
  23. GRB 081022: Swift detection of a burst
  24. GRB 081007: Rapid PROMPT Detections
  25. GRB081006: Fermi GBM detection
  26. GRB 081007: Early RAPTOR measurements of optical counterpart
  27. GRB 081007: Swift-XRT Team refined analysis
  28. GRB 080928: Fermi GBM detection
  29. GRB 080928: Swift-XRT refined analysis
  30. GRB 080916C: Fermi GBM Spectral Analysis
  31. GRB 080916A: Fermi GBM detection
  32. GRB 080915: Swift-XRT afterglow detection and analysis
  33. GRB 080913: GROND photo-z
  34. Swift Trigger 324116 is known source again
  35. GRB 080906: GROND observations of the optical/NIR afterglow
  36. GRB 080905A: NOT and VLT observations
  37. GRB 080903: Swift-XRT Refined Analysis
  38. Radio Detection of SGR 0501+4516: Retraction
  39. SGR 0501+4516: Decline in Activity
  40. SGR 0501+4516: Proximity to supernova remnant HB9
  41. SGR 0501+4516: Swift XRT measure of the spin period
  42. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  43. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  44. Radio Detection of SGR 0501+4516
  45. SGR 0501+4516: MDM Optical Observations
  46. SGR 0501+4516: Astrotel-Caucasus optical observations
  47. GLAST Burst Monitor detection of GRB 080818
  48. GRB 080810: RTT150 optical observations
  49. GRB 080810: Swift-XRT Team refined analysis
  50. GRB 080723B: GROND upper limits
  51. GRB 080804: GROND observations
  52. GRB080805 optical limit by "Pi of the Sky"
  53. GRB 080802: Swift-XRT Refined Analysis
  54. GRB 080727A: Early IR observations
  55. GRB 080727C: Swift XRT refined analysis
  56. GRB 080727B: Swift-XRT refined analysis
  57. GRB 080727A: Swift-XRT refined analysis
  58. GRB 080727B: Swift detection of a bright burst
  59. GRB 080723B - correction to flux conversion factor
  60. GRB 080723B - Swift-XRT refined analysis
  61. GRB 080723: Swift detection of a burst
  62. GRB 080721: Swift-XRT refined analysis
  63. GRB 080714: Swift-XRT refined analysis
  64. GRB 080603B: optical observations in MAO
  65. GRB 080710: Swift-XRT refined analysis
  66. GRB 080703: Swift-XRT refined analysis
  67. GRB 080702A: Swift-XRT Team refined analysis
  68. GRB 080701: Swift-XRT refined analysis
  69. GRB 080623: GROND upper limits
  70. GRB 080623: Swift-XRT refined analysis
  71. GRB 080613B: Swift-XRT refined analysis
  72. GRB080605: optical observation with the MITSuME-OAO telescope
  73. GRB 080605: Swift-XRT refined analysis
  74. GRB 080604: Swift-XRT refined analysis
  75. GRB 080603B: Swift-XRT refined analysis
  76. GRB 080603: Gemini-North redshift
  77. GRB 080524: Swift-BAT detection of a burst in ground analysis
  78. GRB 080523: VLT optical observations
  79. GRB 080520: Swift XRT Refined Analysis
  80. GRB 080520: Swift detection of a burst with optical afterglow
  81. GRB 080517: Swift-XRT refined analysis
  82. GRB 080517: Swift detection of a burst
  83. GRB 080516: Swift-XRT Team refined analysis
  84. GRB 080514B: KPNO 4m IR observations
  85. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  86. GRB 080506: Swift XRT refined analysis
  87. GRB080503, RIMOTS optical upper limit
  88. GRB080503 XRT refined analysis
  89. GRB 080430
  90. GRB 080430: Swift-XRT refined analysis
  91. GRB 080426: Swift-XRT refined analysis
  92. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  93. GRB 080413B: Swift XRT refined analysis
  94. GRB 080413A: Swift-XRT refined analysis
  95. GRB 080409: Swift detection of a burst
  96. GRB080328, RIMOTS optical upper limit
  97. GRB080310, late-time photometry with LBT
  98. GRB080325: XRT Refined Analysis
  99. GRB 080319D, Swift-BAT refined analysis
  100. GRB 080320: Swift XRT refined analysis

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