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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"

20996 results found.

  1. GRB061122: Swift/UVOT Optical Observations
  2. GRB061121: P60 Observations
  3. Radio detection of GRB 061121
  4. GRB 061121: MDM Optical Observations
  5. GRB 061121 declared "Burst of Interest" by Swift team
  6. Konus-Wind and Konus-A observations of GRB 061121
  7. GRB 061121: Swift/UVOT Observations
  8. GRB 061121: Optical observation at the KANATA 1.5m telescope
  9. GRB 061121: Faulkes Telescope North Optical Observation
  10. GRB061121: Keck spectroscopic observations
  11. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  12. GRB 060605: NIR Observations
  13. GRB 050915B: optical afterglow
  14. GRB 061110B: NIR Observations
  15. Swift TOO observations of GRB061110A
  16. GRB 061110A - VLT tentative redshift
  17. GRB 061110B: VLT redshift
  18. GRB061110B: Optical observations at Crni Vrh
  19. GRB 061110B: NOT optical observations
  20. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  21. GRB 061110B: TAROT Calern observatory optical observations
  22. GRB 061110: NOT observations
  23. GRB 061110 : Optical afterglow candidate
  24. GRB 061109: TAROT Calern observatory optical observations
  25. GRB061028: MAGIC telescope GeV observation
  26. GRB 061027: TAROT La Silla observatory optical observations
  27. GRB 061007: Third Epoch ATCA Radio Observations
  28. GRB061019: second epoch CrAO observations
  29. GRB 061004: Further VLT/NTT observations
  30. GRB061102B: Super-LOTIS observations
  31. GRB 061028: Optical R passband observations
  32. GRB 060801: Swift/XRT Astrometry Correction
  33. GRB 061028: Futher P200 Observations
  34. GRB 061028: MDM Observations
  35. GRB 061028: P200 Observations
  36. GRB 061028: SARA upper limit
  37. GRB 061028: Swift/UVOT Observations
  38. GRB 061028: TAROT Calern observatory late optical observations
  39. GRB 061028: TAROT Calern observatory optical observations
  40. GRB061025: Swift/UVOT observations
  41. GRB 061025: REM observations
  42. GRB 061025: Gemini-S observations
  43. GRB061025: Swift XRT position
  44. GRB 061021 - VLT spectrum without lines
  45. GRB 061021: Swift/UVOT Observation
  46. GRB 061019: Super-LOTIS upper limit
  47. GRB060904b: optical observations
  48. GRB061019: optical observations
  49. GRB061019: optical observations
  50. GRB 061019: SMARTS afterglow confirmation
  51. GRB 061019: TAROT La Silla observatory optical observations
  52. GRB 061019: REM K-band candidate afterglow
  53. GRB061019: Swift/XRT position
  54. GRB 060825: GORT Observations
  55. GRB 061007: Second Epoch ATCA Radio Observations
  56. GRB 061006: astrometry-corrected XRT position
  57. GRB 061007: ATCA Radio Observations
  58. GRB061007: Swift UVOT followup observations
  59. GRB 061006: optical afterglow
  60. GRB 061007: Magellan Spectroscopy
  61. GRB 061006: Swift/UVOT optical observations
  62. GRB 061007 - FTS early brightening and power law decay
  63. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  64. GRB 061007: ROTSE-III Detection of Optical Counterpart
  65. GRB 061006: VLT observation
  66. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  67. GRB061006: Faulkes Telescope South Observations
  68. GRB 061004: Las Campanas Optical/NIR Observations
  69. GRB061004: Swift/UVOT optical observations
  70. GRB 060928: Swift observations
  71. GRB061002: Swift UVOT followup observations
  72. VLA observations of GRB 060926
  73. GRB061002 - SDSS Pre-Burst Observations
  74. GRB061002: MASTER-VWF-Kislovodsk observations
  75. GRB 060923A: VLA K-band Observations
  76. GRB 060930: Xinglong TNT optical observations
  77. GRB 060929: Swift/UVOT Optical Observations
  78. GRB 060929: TNG K-band observations
  79. GRB 060929: MASTER-VWF-Kislovodsk observations
  80. GRB 060929: BOOTES-IR & OSN observations
  81. Liverpool Telescope observations of GRB 060929
  82. GRB060908: optical observations
  83. GRB 060729: An update on the late-time Swift observations
  84. GRB060927: optical observations
  85. GRB 060927: Swift/UVOT Optical Observations
  86. GRB 060927: Xinglong TNT optical observations
  87. GRB 060927 : Kiso optical observation
  88. GRB060927: Faulkes Telescope South observation
  89. GRB 060926: MASTER: first minutes decay
  90. GRB060927 - SDSS Pre-Burst Observations
  91. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  92. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  93. GRB 060926: OPTIMA-Burst -- further observations
  94. GRB 060923A: Radio Observations
  95. GRB 060926: MASTER OT alert observation
  96. GRB 060912A: Redshift of probable host galaxy
  97. GRB 060926: BOOTES-IR observations
  98. GRB 060926: Watcher observations
  99. GRB 060923C: Gemini Observations and Afterglow Candidate
  100. GRB 060923C: VLT J-band observations

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