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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"

26664 results found.

  1. GRB 111212A: Swift/UVOT Upper Limits
  2. GRB 111212A: Swift-BAT refined analysis
  3. GRB 111212A: Enhanced Swift-XRT position
  4. GRB 111212A: Swift-XRT observations
  5. GRB 111211A: GROND afterglow candidate
  6. GRB 111211A: SuperAGILE localization of a long GRB
  7. Konus-Wind observation of GRB 111209A
  8. GRB 111210A: GROND observations
  9. GRB 111210A: SDSS prior imaging
  10. GRB 111210A: Swift-XRT refined Analysis
  11. GRB 111210A: MITSuME Okayama Optical upper limits
  12. GRB 111208A: Swift-XRT refined analysis
  13. GRB 111210A: Gemini-North candidate counterpart
  14. GRB 111209A: Rebrightening seen by GROND
  15. GRB111210A: MITSuME Okayama J-band upper-limit
  16. GRB 111210A: Swift/UVOT Upper Limits
  17. GRB 111210A: Enhanced Swift-XRT position
  18. GRB 111210A: Swift detection of a burst
  19. GRB 111209A: GROND Afterglow observations
  20. GRB 111209A optical limit by "Pi of the Sky"
  21. GRB 111209A: PROMPT optical observations of early afterglow
  22. GRB 111208A: Lightbuckets Optical Observations
  23. GRB 111209A: Swift-XRT refined Analysis
  24. GRB 111209A: Swift UVOT refined analysis
  25. GRB 111209A: Swift Burst of Interest
  26. GRB 111209A: Enhanced Swift-XRT position
  27. GRB 111205A: GROND observations
  28. GRB 111209A: Faulkes Telescope North observations
  29. GRB 111209A: REM NIR detection
  30. GRB 111209A: TAROT La Silla observatory optical detection
  31. GRB 111209A: Swift detection of a long burst with an optical counterpart
  32. GRB 111208A: Swift XRT/UVOT observations
  33. GRB 111205A: Swift XRT Observations
  34. GRB 111204A: TNG NIR observations
  35. GRB 111201A: GMG optical observation
  36. GRB 111204A: GROND Observations
  37. GRB 111204A: Swift-XRT refined Analysis
  38. GRB 111022B: CrAO optical limit
  39. GRB 111204A: Swift/UVOT Upper Limits
  40. GRB 110921A: optical observations in Maidanak observatory
  41. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  42. GRB 111204A: Enhanced Swift-XRT position
  43. GRB 111123A: optical upper limit in CrAO
  44. GRB 111204A: Swift detection of a burst
  45. GRB 111201A: Swift/UVOT Upper Limits
  46. GRB111201A: Swift-XRT observations
  47. GRB 111121A: Suzaku WAM observation of the prompt emission
  48. GRB 111129A: Swift/UVOT Detection
  49. GRB 111129A, GROND afterglow observations
  50. GRB 111129A: Swift-XRT refined Analysis
  51. GRB 111126A Circular #12599 erratum
  52. GRB 111129A: Enhanced Swift-XRT position
  53. GRB 111129A: Swift detection of a burst with an optical counterpart
  54. GRB 111126A found in ground analysis of BAT data
  55. GRB 111123A: Swift/UVOT Upper Limits
  56. GRB 111123A - NOT optical observations
  57. GRB 111123A, GROND observations
  58. GRB 111123A: TNG NIR detection of the afterglow candidate
  59. GRB 111123A: Swift-XRT refined Analysis
  60. GRB 111123A: MITSuME Okayama Optical upper limits
  61. GRB 111123A: Enhanced Swift-XRT position
  62. GRB 111123A: GMG optical observation
  63. GRB 111123A: Swift detection of a burst
  64. GRB 111121A: Swift/UVOT Upper Limits
  65. GRB 111121A: Magellan/Megacam observations
  66. GRB 111121A: Swift-XRT refined Analysis
  67. GRB 111121A: Enhanced Swift-XRT position
  68. GRB 111121A: Swift detection of a short hard burst
  69. GRB 111117A: Gemini Afterglow Limits
  70. GRB 111117A: optical upper limit in CrAO
  71. GRB 111117A: Fermi GBM observation
  72. GRB 111117A: TNG observations
  73. GRB 111117A: Swift/UVOT Upper Limits
  74. GRB 111117A: GROND observations
  75. GRB 111117A: Gemini host observation
  76. GRB 111117A: Swift-XRT refined Analysis
  77. GRB 111117A: NOT observations
  78. GRB 111117A: Chandra ToO observation scheduled
  79. GRB 111117A: GMG upper limit
  80. GRB 111117A: Swift detection of a short hard burst
  81. GRB111107A: ATCA observations - upper limit and a possible detection
  82. IPN Triangulation of GRB 111113A (short/hard/intense)
  83. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  84. GRB 111109A: Swift-XRT refined Analysis
  85. GRB 111109A: Swift/UVOT Photometry
  86. GRB 111109A: Swift-BAT refined analysis
  87. GRB 111109A: Enhanced Swift-XRT position
  88. GRB 111109A: Swift-XRT observations
  89. GRB 111103B: optical upper limit of CrAO
  90. GRB 111103B: optical upper limit of Mt. Terskol observatory
  91. GRB 111107A: Fermi GBM observation
  92. Continued Skynet observations of GRB111107A
  93. GRB 111107A: Swift-XRT refined Analysis
  94. GRB 111107A: APEX submm observation
  95. GRB 111107A: Swift/UVOT Afterglow Analysis
  96. GRB 111107A: Swift-BAT refined analysis
  97. GRB 111107A: Enhanced Swift-XRT position
  98. GRB 111107A: GROND observations
  99. Skynet observations of GRB 111107A
  100. GRB 111107A: Swift detection of a burst with an optical counterpart

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