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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"

23727 results found.

  1. GRB 120202A: GROND observations
  2. GRB 120202A: TAROT Calern observatory optical observations
  3. GRB 120129A: MASTER optical observations
  4. GRB 120116A, the review of the sky area in plate archives
  5. Konus-Wind observation of GRB 120129A
  6. IPN Triangulation of GRB 120129A (long/intense)
  7. GRB 120127A: MASTER optical observations
  8. GRB 120127A: MAXI/GSC detection of a probable GRB
  9. GRB 120116A: optical upper limit
  10. GRB 120119A : LOAO Optical Observations
  11. GRB 111225A: optical observations
  12. GRB 120121A: Swift-BAT refined analysis
  13. GRB 120121A: ISON-NM optical observations
  14. GRB 120121A: Swift detection of a burst
  15. GRB 120119A, Swift-BAT refined analysis
  16. GRB 120119A: TAROT La Silla observatory optical observations
  17. GRB 120119A: optical observations
  18. GRB 120119A: Swift/UVOT Observations
  19. GRB 120118B: RTT150 optical observations
  20. GRB 120102A, the review of the sky area in plate archive
  21. GRB 120118B, Swift-BAT refined analysis
  22. Konus-Wind observation of GRB 120119A
  23. GRB 120119A: optical observations
  24. GRB 120118B: TNG NIR observations
  25. GRB 120118B: Swift-XRT refined Analysis
  26. GRB 120118B : Lulin Optical limit
  27. GRB 120119A: MMT redshift confirmation
  28. GRB 120119A: Gemini-S redshift
  29. GRB 120119A: PROMPT optical observation of early afterglow
  30. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  31. GRB 120118B: Swift/UVOT Upper Limits
  32. GRB 120119A: Liverpool Telescope afterglow detection
  33. GRB 120119A: PAIRITEL NIR Detection
  34. GRB 120119A: Swift detection of a burst with an optical counterpart
  35. GRB 120118B: NOT observations
  36. GRB 120118B: Faulkes Telescope South observations
  37. GRB 120118B: Swift-XRT position
  38. GRB 120118B: MASTER optical observations
  39. GRB 120118B: Swift detection of a burst
  40. GRB 120116A: Swift/UVOT Upper Limits
  41. GRB 120116A: Swift-BAT refined analysis
  42. GRB 120116A: NOT observations
  43. GRB 120116A: MASTER Early optical limit
  44. GRB 120116A: Swift detection of a burst
  45. GRB 120114A found in ground analysis of BAT data
  46. GRB 111228A: optical observations
  47. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  48. GRB 120106A: optical upper limit
  49. Swift detection of an SGR burst from AXP 4U 0142+61
  50. GRB 120107A: Suzaku WAM observation of the prompt emission
  51. GRB 110915B, the review of the sky area in plate archives
  52. Konus-Wind observation of GRB 120107A
  53. IPN Triangulation of GRB 120107A
  54. GRB 120106A: MASTER Early OT marginally detection
  55. INTEGRAL Weak trigger #6433: GRT Optical Observation
  56. GRB 120106A: Swift-BAT refined analysis
  57. GRB 120106A: MITSuME Okayama Optical upper limits
  58. GRB 120106A: Enhanced Swift-XRT position
  59. GRB 120106A: TAROT Calern observatory optical observations
  60. GRB 120106A: MASTER-Tunka optical observations
  61. GRB 120106A: Swift detection of a burst
  62. GRB111228A :LOAO R-band Observations
  63. GRB 111225A, the review of the sky area in plate archives
  64. GRB 111222A, the review of the sky area in plate archives
  65. GRB 111222A: Second Swift observation
  66. Konus-Wind observation of GRB 120102A
  67. GRB 120102A: Swift-BAT refined analysis
  68. GRB 111228A, optical observations
  69. GRB 111228A: LOAO Optical Observation
  70. Konus-Wind observation of GRB 111228A
  71. GRB 111228A: MASTER-Net optical photometry
  72. GRB 111228A: correction for GCN 12787
  73. GRB 111228A: Optical and NIR observations with Kanata telescope
  74. GRB 110915A, the review of the sky area in plate archives
  75. GRB 111229A: Faulkes Telescope South observations
  76. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  77. GRB111228A: Further GMG observations
  78. GRB 111229A: Gemini-South Redshift
  79. GRB 111229A: Swift-BAT refined analysis
  80. GRB 111229A: GROND afterglow candidate
  81. GRB 111228A: Liverpool Telescope Observations
  82. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  83. GRB 111228A: GMG optical observation
  84. GRB111228A: TNG spectroscopy analysis
  85. FERMI GRB111228.45: MASTER observations
  86. GRB 111228A: Gemini South Redshift
  87. GRB 111228A: MMT Redshift
  88. GRB 111228A: TAROT La Silla observatory observations
  89. GRB 111228A: GROND observations
  90. GRB 111228A: MASTER OT observations
  91. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  92. GRB 111228A: GRAS017 optical observations
  93. GRB 111228A: Swift/UVOT Detection
  94. GRB 111228A: Skynet/Dolomiti Optical Observations
  95. GRB 111228A, Swift-BAT refined analysis
  96. GRB 111228A: TAROT Calern observatory. OT decay stopped
  97. GRB 111228A: Fermi GBM observation
  98. GRB111228A: MITSuME Okayama Optical Observation
  99. GRB 111228A: TAROT Calern observatory. OT seems still bright
  100. XMM-Newton observation of the short GRB 111020A

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