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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"

28260 results found.

  1. XRF 120118A: further INTEGRAL analysis
  2. GRB 120116A: Swift/UVOT Upper Limits
  3. GRB 120116A: Swift-XRT refined Analysis
  4. GRB 120116A: Enhanced Swift-XRT position
  5. AXP 4U 1042+61: Mondy optical observations
  6. GRB 120116A: Mondy optical observations
  7. GRB 120116A: WHT optical observations
  8. GRB 120116A: Optical observations at Crni Vrh
  9. GRB 120116A: Swift-BAT refined analysis
  10. GRB 120116A: NOT observations
  11. GRB 120116A: IAC80 I-band observations
  12. GRB 120116A: Bassano Bresciano Observatory optical observations
  13. GRB 120116A: Swift detection of a burst
  14. GRB 120114A found in ground analysis of BAT data
  15. GRB 111228A: optical observations
  16. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  17. GRB 120106A: optical upper limit
  18. Swift detection of an SGR burst from AXP 4U 0142+61
  19. GRB 120107A: Suzaku WAM observation of the prompt emission
  20. GRB 110915B, the review of the sky area in plate archives
  21. GRB 120107A: Fermi GBM observation
  22. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  23. GRB 120106A: Swift/UVOT Upper Limits
  24. GRB 120106A: Bassano Bresciano Observatory optical observations
  25. GRB 120106A: MITSuME Okayama Ks-band upper limit
  26. GRB 120106A: Swift-XRT refined Analysis
  27. INTEGRAL Weak trigger #6433: GRT Optical Observation
  28. GRB 120106A: Swift-BAT refined analysis
  29. GRB 120106A: MITSuME Okayama Optical upper limits
  30. GRB 120106A: Enhanced Swift-XRT position
  31. GRB 120106A: TAROT Calern observatory optical observations
  32. GRB 120106A: Swift detection of a burst
  33. GRB111228A :LOAO R-band Observations
  34. GRB 111225A, the review of the sky area in plate archives
  35. GRB 111222A, the review of the sky area in plate archives
  36. GRB 111222A: Second Swift observation
  37. GRB 111211A: Detection of the SN with the 10.4m GTC
  38. GRB 120102A: Fermi GBM observation
  39. GRB 120102A: Swift-BAT refined analysis
  40. GRB 111228A: optical observations in CrAO
  41. GRB 120102A: Swift-XRT refined Analysis
  42. GRB 120102A: Swift/UVOT Detection
  43. GRB 120102A: Enhanced Swift-XRT position
  44. GRB 120102A: Swift detection of a burst with an optical counterpart
  45. GRB 111225A: optical observations in CrAO
  46. GRB 111228A: LOAO Optical Observation
  47. GRB 110915A, the review of the sky area in plate archives
  48. GRB 111229A: Swift/UVOT Detection
  49. GRB 111229A: Faulkes Telescope South observations
  50. GRB 111229A: Swift-XRT refined Analysis
  51. GRB 111229A: Enhanced Swift-XRT position
  52. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  53. GRB 111229A: Gemini-South Redshift
  54. GRB 111229A: Swift-BAT refined analysis
  55. GRB 111229A: GROND afterglow candidate
  56. GRB 111229A: Swift detection of a burst
  57. GRB 111228A: Liverpool Telescope Observations
  58. GRB 111225A: Lightbuckets Optical Observations
  59. GRB 111228A: P60 Observations
  60. GRB 111228A: T100 observations
  61. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  62. GRB 111228A: GMG optical observation
  63. GRB 111228A: Swift-XRT refined Analysis
  64. FERMI GRB111228.45: MASTER observations
  65. GRB 111228A: PAIRITEL NIR Detection
  66. GRB 111228A: TAROT La Silla observatory observations
  67. GRB 111228A: GROND observations
  68. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  69. GRB 111228A: IAC80 BVI-band observations
  70. GRB 111228A: Swift/UVOT Detection
  71. GRB 111228A: Skynet/Dolomiti Optical Observations
  72. GRB 111228A: NOT optical observation
  73. GRB 111228A, Swift-BAT refined analysis
  74. GRB 111228A: optical observations
  75. GRB 111228A: Enhanced Swift-XRT position
  76. GRB 111228A: TAROT Calern observatory. OT decay stopped
  77. GRB 111228A, optical observations
  78. GRB 111228A: Fermi GBM observation
  79. GRB111228A: MITSuME Okayama Optical Observation
  80. GRB 111228A: TAROT Calern observatory. OT seems still bright
  81. GRB 111228A: Possible host galaxy in the SDSS arhive
  82. GRB 111225A, optical observations
  83. GRB 111228A: Swift detection of a burst with an optical counterpart
  84. GRB 111205A: optical observations
  85. GRB 111225A: Swift/UVOT Observations
  86. GRB 111215A: Keck/LRIS Imaging
  87. GRB 111225A: Keck/LRIS Afterglow Photometry
  88. GRB 111222A : Suzaku WAM observation of the prompt emission
  89. GRB 111225A: PAIRITEL NIR Upper Limits
  90. GRB111225A: MITSuME Okayama optical upper limits
  91. GRB 111225A: GRT Optical Observation
  92. GRB 111225A: 1.23m CAHA optical observations
  93. GRB 111225A: Swift-XRT refined Analysis
  94. GRB 111225A, Swift-BAT refined analysis
  95. GRB 111225A: Enhanced Swift-XRT position
  96. GRB 111225A: Super-LOTIS early detection
  97. GRB 111225A: TAROT Calern observatory optical detection
  98. GRB 111225A: TAROT Calern observatory optical observations
  99. GRB 111225A: Swift detection of a burst with an optical counterpart
  100. GRB111222A: GMG optical observation

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