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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"

32716 results found.

  1. GRB 100728B: optical photometry of ISON-NM
  2. GRB 100713A: second epoch Maidanak optical observation
  3. GRB 100713A: CrAO optical limits
  4. GRB 100802A: NOT optical observation
  5. GRB100802A: MITSuME optical upper limits
  6. GRB 100802A: P60 Observations
  7. GRB 100802A: XRT refined analysis
  8. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  9. GRB 100728A: Suzaku WAM observation of the prompt emission
  10. GRB 100802A: Swift-BAT refined analysis
  11. GRB 100802A: Liverpool Telescope observations
  12. GRB 100802A: ROTSE-III Optical Limits
  13. GRB 100728B: Swift/UVOT Observations (correction to GCN 11028)
  14. GRB 100728B - NOT optical observation
  15. GRB 100728B: Swift/UVOT Observations
  16. GRB 100728B: Lick Observations
  17. GRB 100728B: Continued KAIT observations
  18. GRB 100728B, Swift-BAT refined analysis
  19. GRB 100728B: Swift-XRT Refined Analysis
  20. Konus-Wind observation of GRB 100728A
  21. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  22. GRB 100727A: Swift/UVOT Upper Limits
  23. GRB 100728A, Swift-BAT refined analysis
  24. GRB 100728A: Swift/UVOT Upper Limits
  25. GRB 100728B: Fermi GBM observation
  26. GRB 100728A: Swift-XRT refined analysis
  27. GRB 100728B: GROND Detection of the NIR Afterglow
  28. GRB 100728B: optical detection
  29. GRB 100728B: Skynet/PROMPT Detections (correction)
  30. GRB 100728B: KAIT optical afterglow detection (correction)
  31. GRB 100728A: Fermi GBM observation
  32. GRB 100727A: Swift XRT refined analysis
  33. GRB 100727A: Fermi GBM observation
  34. GRB 100727A, Swift-BAT refined analysis
  35. GRB100727A: MOA optical upper limit
  36. GRB 100724B: AGILE/GRID analysis
  37. GRB 100724B: Suzaku WAM observation of the prompt emission
  38. GRB 100724B: gamma-ray detection by AGILE
  39. GRB 100725B: Swift-BAT refined analysis
  40. GRB 100725B: refined XRT analysis
  41. GRB 100725A: GROND upper limits
  42. GRB 100725B: Swift/UVOT Upper Limits
  43. GRB 100725A: Swift/UVOT Upper Limits
  44. GRB 100725A: Swift-BAT refined analysis
  45. GRB 100725A: Swift XRT refined analysis
  46. GRB100725B: Faulkes Telescope North observations
  47. GRB100725A Faulkes Telescope South observations
  48. Konus-Wind observation of GRB 100724B
  49. GRB 100724B: Fermi LAT and GBM analysis
  50. GRB 100724A: Swift/BAT spectral lag results
  51. GRB 100724A: Swift XRT refined analysis
  52. GRB 100724A: Swift/UVOT observations
  53. GRB 100724A: Swift-BAT refined analysis
  54. GRB 100724A: X-shooter redshift
  55. GRB 100724A: fading afterglow seen with GROND
  56. GRB 100724A, GROND detection of an afterglow candidate
  57. GRB 100614A: 10.4-m GTC deep-optical limit
  58. GRB 100719A: Swift-BAT refined analysis
  59. GRB 100713A: optical observation in Maidanak
  60. GRB 100713A: further inspection of TNG images
  61. GRB 100713A: Swift XRT refined analysis
  62. GRB 100713A : IRSF/SIRIUS NIR upper limits
  63. GRB100713A: Swift/UVOT observations
  64. GRB 100713A: GROND upper limits
  65. GRB 100713A: optical upper limit
  66. GRB 100713A: TNG optical observations
  67. GRB 100707A: Suzaku WAM observation of the prompt emission
  68. Konus-Wind observation of GRB 100707A
  69. IPN triangulation of GRB 100707A
  70. GRB 100628A: Keck/LRIS Spectroscopy of Host Galaxy Candidate
  71. GRB 100707A: Fermi LAT detection
  72. GRB 100628A: Near-IR sources coincident with the possible X-ray afterglow
  73. GRB 100628A: Chandra observations
  74. GRB 100628A: Swift XRT/UVOT refined analysis
  75. Tentative redshift of GRB100704A from Swift-XRT data
  76. Konus-Wind observation of GRB 100701B
  77. IPN triangulation of GRB 100701B
  78. Konus-Wind observation of GRB 100704A
  79. GRB 100704A: Swift XRT refined analysis
  80. GRB 100704: Swift/UVOT Upper Limits
  81. GRB 100704A: Fermi GBM observation
  82. GRB 100704A: Swift-BAT refined analysis
  83. GRB100704A: MOA optical upper limit
  84. GRB 100615A: Additional Gemini/NIRI observations
  85. GRB 100526A: Gemini/NIRI afterglow confirmation and host galaxy
  86. GRB 100702A, Swift-BAT refined analysis
  87. GRB 100702A: Swift XRT refined analysis
  88. Swift/UVOT observations of GRB100702A - correction
  89. Swift/UVOT observations of GRB100702A
  90. GRB 100702A: Second epoch of Magellan near-IR observations and afterglow limits
  91. GRB 100702A: Magellan near-IR observations
  92. GRB 100702A: VLT optical observations
  93. GRB 100702: ROTSE-III Optical Limits
  94. GRB 100615A: Chandra X-ray ToO Observation
  95. GRB 100213B: Detection of Fading Optical Afterglow
  96. GRB 100625A: Fermi GBM detection
  97. GRB 100628A: Second epoch of Magellan near-IR observations
  98. GRB 100628A: GROND optical/NIR observations of the host candidate
  99. GRB 100628A: Gemini North Observations
  100. GRB 100628A: Coincidence of source "G1" with revised XRT error circle

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