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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"

20411 results found.

  1. Konus-Wind observation of GRB 111209A
  2. GRB 111210A: GROND observations
  3. GRB 111210A: SDSS prior imaging
  4. GRB 111210A: MITSuME Okayama Optical upper limits
  5. GRB 111208A: Swift-XRT refined analysis
  6. GRB 111210A: Gemini-North candidate counterpart
  7. GRB111210A: MITSuME Okayama J-band upper-limit
  8. GRB 111210A: Swift/UVOT Upper Limits
  9. GRB 111210A: Enhanced Swift-XRT position
  10. GRB 111210A: Swift detection of a burst
  11. GRB 111209A: GROND Afterglow observations
  12. GRB 111209A optical limit by "Pi of the Sky"
  13. GRB 111209A: PROMPT optical observations of early afterglow
  14. GRB 111208A: Lightbuckets Optical Observations
  15. GRB 111209A: Swift UVOT refined analysis
  16. GRB 111209A: Swift Burst of Interest
  17. GRB 111209A: Enhanced Swift-XRT position
  18. GRB 111205A: GROND observations
  19. GRB 111209A: REM NIR detection
  20. GRB 111209A: TAROT La Silla observatory optical detection
  21. GRB 111209A: Swift detection of a long burst with an optical counterpart
  22. GRB 111208A: Swift XRT/UVOT observations
  23. GRB 111205A: Swift XRT Observations
  24. Konus-Wind observation of GRB 111205A
  25. GRB 111204A: TNG NIR observations
  26. GRB 111201A: GMG optical observation
  27. GRB 111204A: GROND Observations
  28. GRB 111022B: CrAO optical limit
  29. GRB 111204A: Swift/UVOT Upper Limits
  30. GRB 110921A: optical observations in Maidanak observatory
  31. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  32. GRB 111204A: Enhanced Swift-XRT position
  33. GRB 111123A: optical upper limit in CrAO
  34. GRB 111204A: Swift detection of a burst
  35. GRB 111201A: Swift/UVOT Upper Limits
  36. GRB 111129A: Swift/UVOT Detection
  37. GRB 111129A, GROND afterglow observations
  38. GRB 111129A: Enhanced Swift-XRT position
  39. GRB 111129A: Swift detection of a burst with an optical counterpart
  40. GRB 111123A: Swift/UVOT Upper Limits
  41. GRB 111123A - NOT optical observations
  42. GRB 111123A, GROND observations
  43. GRB 111123A: TNG NIR detection of the afterglow candidate
  44. GRB 111123A: MITSuME Okayama Optical upper limits
  45. GRB 111123A: Enhanced Swift-XRT position
  46. GRB 111123A: GMG optical observation
  47. GRB 111117A: Refined Chandra Astrometry
  48. GRB 111123A: Swift detection of a burst
  49. GRB 111121A: Swift/UVOT Upper Limits
  50. GRB 111121A: Magellan/Megacam observations
  51. GRB 111121A: Enhanced Swift-XRT position
  52. GRB 111121A: Swift detection of a short hard burst
  53. GRB 111117A: Gemini Afterglow Limits
  54. GRB 111117A: optical upper limit in CrAO
  55. GRB 111117A: TNG observations
  56. GRB 111117A: Swift/UVOT Upper Limits
  57. GRB 111117A: GROND observations
  58. GRB 111117A: Gemini host observation
  59. GRB 111117A: Swift-XRT refined Analysis
  60. GRB 111117A: NOT observations
  61. GRB 111117A: Chandra ToO observation scheduled
  62. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  63. GRB 111117A: GMG upper limit
  64. GRB 111117A: Swift detection of a short hard burst
  65. GRB111107A: ATCA observations - upper limit and a possible detection
  66. IPN Triangulation of GRB 111113A (short/hard/intense)
  67. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  68. GRB 111109A: Swift/UVOT Photometry
  69. GRB 111109A: Enhanced Swift-XRT position
  70. GRB 111109A: Swift-XRT observations
  71. GRB 111103B: optical upper limit of CrAO
  72. GRB 111103B: optical upper limit of Mt. Terskol observatory
  73. Continued Skynet observations of GRB111107A
  74. GRB 111107A: APEX submm observation
  75. GRB 111107A: Swift/UVOT Afterglow Analysis
  76. GRB 111107A: Enhanced Swift-XRT position
  77. GRB 111107A: GROND observations
  78. Skynet observations of GRB 111107A
  79. GRB 111107A: Swift detection of a burst with an optical counterpart
  80. GRB 111103B: MITSuME Akeno Optical upper limits
  81. Konus-Wind observation of GRB 111103B
  82. GRB 111103B : WIYN 3.5m NIR observations
  83. GRB111103B Swift/UVOT Upper Limits
  84. GRB 111103B: Enhanced Swift-XRT position
  85. GRB 111103B: Swift-BAT refined analysis
  86. GRB 111103A: Swift-BAT refined analysis
  87. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  88. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  89. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  90. GRB 111029A: SAO RAS optical limits
  91. GRB 111029A: Super-LOTIS early limits
  92. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  93. GRB 111029A: PAIRITEL NIR Upper Limits
  94. GRB 111026A: Swift-BAT refined analysis
  95. GRB 111029A: Swift/UVOT Upper Limits
  96. GRB 111029A: Enhanced Swift-XRT position
  97. GRB 111029A: optical upper limit
  98. GRB 111029A: ROTSE-III Optical Limits
  99. GRB 111029A: Swift detection of a burst
  100. GRB 111022B: 10.4m GTC z'-band observations

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