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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"

15375 results found.

  1. GROND observations of GRB 120311A
  2. GRB 120311A: Swift/UVOT Upper Limits
  3. GRB 120308A: Further PAIRITEL NIR Observations
  4. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  5. GRB 120308A: Swift/UVOT Detection
  6. GRB 120308A: PAIRITEL NIR observations
  7. GRB 120302A: Fermi GBM Observation
  8. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  9. GRB 120302A: GROND detection of an afterglow candidate
  10. GRB 111222A: Swift observation on 2012 February 06/07
  11. Konus-Wind observation of GRB 120226A
  12. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  13. GRB 120226A: Fermi-LAT data analysis
  14. IPN Triangulation of GRB 120226A
  15. GRB 120224A: VLT/X-shooter observations
  16. GRB 120224A: optical observation in Mondy observatory
  17. GRB 120226A: Fermi-LAT detection of a burst
  18. GRB 120224A: GROND detection of the afterglow candidate
  19. GRB 120219A: 1.23m CAHA optical observations
  20. GRB 120219A, optical observations
  21. GRB120219A: Keck Observations
  22. GRB 120219A: MITSuME Okayama Optical upper limits
  23. GRB 120215A: Swift/UVOT Upper Limits
  24. GRB 120215A: MITSuME Okayama Optical upper limits
  25. Fermi GBM detection of an SGR-like burst
  26. Skynet/PROMPT observations of GRB120215A
  27. GRB 120212A: MITSuME Ishigakijima Optical Observation
  28. GRB 120211A: GROND Upper limits
  29. Swift detection of a burst from LS I +61 303
  30. GRB 120202A: GROND observations
  31. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  32. GRB 111228A: Possible host detected by Swift/UVOT
  33. Konus-Wind observation of GRB 120129A
  34. GRB 120118B: optical upper limit
  35. GRB 120119A: GRT detection of early afterglow
  36. GRB 111225A: optical observations
  37. GRB 120119A: TAROT La Silla observatory optical observations
  38. GRB 120119A: optical observations
  39. Konus-Wind observation of GRB 120119A
  40. GRB 120119A: Lick 3m Spectroscopy
  41. GRB 120119A: PROMPT optical observation of early afterglow
  42. GRB 120119A: PAIRITEL NIR Detection
  43. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  44. GRB 120116A: Mondy optical observations
  45. GRB 120107A: Suzaku WAM observation of the prompt emission
  46. GRB 120106A: MITSuME Okayama Optical Observation (update)
  47. Konus-Wind observation of GRB 120107A
  48. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  49. GRB 111222A: Fermi GBM observations
  50. GRB 111222A: Second Swift observation
  51. GRB 120102A: Fermi GBM observation
  52. Konus-Wind observation of GRB 120102A
  53. Konus-Wind observation of GRB 111228A
  54. GRB 111229A: Gemini-South Redshift
  55. GRB 111228A: P60 Observations
  56. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  57. GRB111228A: TNG spectroscopy analysis
  58. GRB 111228A: PAIRITEL NIR Detection
  59. GRB 111228A: TAROT La Silla observatory observations
  60. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  61. GRB 111228A: optical observations
  62. GRB 111228A: Fermi GBM observation
  63. GRB111228A: MITSuME Okayama Optical Observation
  64. GRB 111225A, optical observations
  65. GRB 111225A: Keck/LRIS Afterglow Photometry
  66. GRB 111222A : Suzaku WAM observation of the prompt emission
  67. GRB 111225A: PAIRITEL NIR Upper Limits
  68. GRB111225A: MITSuME Okayama optical upper limits
  69. GRB 111222A: Xinglong TNT observation
  70. GRB 111222A: Swift/UVOT Observations
  71. Konus-Wind observation of GRB 111222A
  72. GRB 111215A: EVLA observations
  73. GRB 110820A: optical observations in Maidanak observatory
  74. GRB 111215B: Suzaku WAM observation of the prompt emission
  75. GRB 111211A: optical ovservations at Mt. Terskol observatory
  76. Konus-Wind observation of GRB 111215B
  77. GRB 111205A: Confirmation of X-ray Afterglow
  78. GRB 111215A: TNG K-band observations
  79. GRB 111215A: GMG optical upper limit
  80. GRB 111211A: Swift/UVOT Detection
  81. Konus-Wind observation of GRB 111211A
  82. GRB 111211A: SuperAGILE localization of a long GRB
  83. Konus-Wind observation of GRB 111209A
  84. GRB 111209A: Rebrightening seen by GROND
  85. GRB 111209A: GROND Afterglow observations
  86. GRB 111209A: Faulkes Telescope North observations
  87. GRB 111209A: REM NIR detection
  88. GRB 111207A found in ground analysis of BAT data
  89. Konus-Wind observation of GRB 111205A
  90. GRB 110921A: optical observations in Maidanak observatory
  91. GRB 111121A: Suzaku WAM observation of the prompt emission
  92. GRB 111123A: correction to GCN 12593
  93. GRB 111123A: TNG NIR detection of the afterglow candidate
  94. Konus-Wind observation of GRB 111121A
  95. GRB 111117A: Chandra detection of the afterglow
  96. GRB 111117A: Fermi GBM observation
  97. GRB 111117A: further NOT observations
  98. GRB 111117A: TNG observations
  99. GRB 111117A: GROND observations
  100. GRB 111117A: Gemini host observation

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