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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"

45700 results found.

  1. GRB 120116A: NOT observations
  2. GRB 120116A: IAC80 I-band observations
  3. GRB 120116A: Bassano Bresciano Observatory optical observations
  4. GRB 120116A: MASTER Early optical limit
  5. GRB 120116A: Swift detection of a burst
  6. GRB 120114A found in ground analysis of BAT data
  7. GRB 111228A: optical observations
  8. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  9. GRB 120106A: optical upper limit
  10. Swift detection of an SGR burst from AXP 4U 0142+61
  11. GRB 120107A: Suzaku WAM observation of the prompt emission
  12. GRB 110915B, the review of the sky area in plate archives
  13. GRB 120107A: Fermi GBM observation
  14. GRB 120106A: MITSuME Okayama Optical Observation (update)
  15. Konus-Wind observation of GRB 120107A
  16. IPN Triangulation of GRB 120107A
  17. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  18. GRB 120106A: Swift/UVOT Upper Limits
  19. GRB 120106A: Bassano Bresciano Observatory optical observations
  20. GRB 120106A: MITSuME Okayama Ks-band upper limit
  21. GRB 120106A: MASTER Early OT marginally detection
  22. GRB 120106A: Swift-XRT refined Analysis
  23. INTEGRAL Weak trigger #6433: GRT Optical Observation
  24. GRB 120106A: Swift-BAT refined analysis
  25. GRB 120106A: MITSuME Okayama Optical upper limits
  26. GRB 120106A: Enhanced Swift-XRT position
  27. GRB 120106A: TAROT Calern observatory optical observations
  28. GRB 120106A: MASTER-Tunka optical observations
  29. GRB 120106A: Swift detection of a burst
  30. GRB111228A :LOAO R-band Observations
  31. GRB 111225A, the review of the sky area in plate archives
  32. GRB 111222A, the review of the sky area in plate archives
  33. GRB 111222A: Fermi GBM observations
  34. GRB 111222A: Second Swift observation
  35. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  36. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  37. GRB 111211A: Detection of the SN with the 10.4m GTC
  38. GRB 120102A: Fermi GBM observation
  39. Konus-Wind observation of GRB 120102A
  40. GRB 120102A: Swift-BAT refined analysis
  41. GRB 111228A: optical observations in CrAO
  42. GRB 120102A: Swift-XRT refined Analysis
  43. GRB 120102A: Swift/UVOT Detection
  44. GRB 120102A: Enhanced Swift-XRT position
  45. GRB 120102A: Swift detection of a burst with an optical counterpart
  46. GRB 111225A: optical observations in CrAO
  47. GRB 111228A, optical observations
  48. GRB 111228A: LOAO Optical Observation
  49. Konus-Wind observation of GRB 111228A
  50. GRB 111228A: MASTER-Net optical photometry
  51. GRB 111228A: correction for GCN 12787
  52. GRB 111228A: Optical and NIR observations with Kanata telescope
  53. GRB 110915A, the review of the sky area in plate archives
  54. GRB 111228A: SMARTS optical/IR afterglow observations
  55. GRB 111229A: Swift/UVOT Detection
  56. GRB 111229A: Faulkes Telescope South observations
  57. GRB 111229A: Swift-XRT refined Analysis
  58. GRB 111229A: Enhanced Swift-XRT position
  59. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  60. GRB111228A: Further GMG observations
  61. GRB 111229A: Gemini-South Redshift
  62. GRB 111229A: Swift-BAT refined analysis
  63. GRB 111229A: GROND afterglow candidate
  64. GRB 111229A: Swift detection of a burst
  65. GRB 111228A: Liverpool Telescope Observations
  66. GRB 111225A: Lightbuckets Optical Observations
  67. GRB 111228A: P60 Observations
  68. GRB 111228A: X-shooter spectroscopy
  69. GRB 111228A: T100 observations
  70. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  71. GRB 111228A: GMG optical observation
  72. GRB 111228A: Swift-XRT refined Analysis
  73. GRB 111228A: NOT redshift
  74. GRB111228A: TNG spectroscopy analysis
  75. FERMI GRB111228.45: MASTER observations
  76. GRB 111228A: Gemini South Redshift
  77. GRB 111228A: PAIRITEL NIR Detection
  78. GRB 111228A: MMT Redshift
  79. GRB 111228A: TAROT La Silla observatory observations
  80. GRB 111228A: GROND observations
  81. GRB 111228A: MASTER OT observations
  82. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  83. GRB 111228A: GRAS017 optical observations
  84. GRB 111228A: IAC80 BVI-band observations
  85. GRB 111228A: Swift/UVOT Detection
  86. GRB 111228A: Skynet/Dolomiti Optical Observations
  87. GRB 111228A: NOT optical observation
  88. GRB 111228A, Swift-BAT refined analysis
  89. GRB 111228A: optical observations
  90. GRB 111228A: Enhanced Swift-XRT position
  91. GRB 111228A: TAROT Calern observatory. OT decay stopped
  92. GRB 111228A, optical observations
  93. GRB 111228A: Fermi GBM observation
  94. GRB111228A: MITSuME Okayama Optical Observation
  95. GRB 111228A: TAROT Calern observatory. OT seems still bright
  96. GRB 111228A: Possible host galaxy in the SDSS arhive
  97. GRB 111225A, optical observations
  98. XMM-Newton observation of the short GRB 111020A
  99. GRB 111228A: Xinglong TNT confirms the optical afterglow
  100. GRB 111228A: Swift detection of a burst with an optical counterpart

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