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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"

15387 results found.

  1. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  2. GRB 120229A: Magellan observations and limit on an optical afterglow
  3. GRB 120320A: Swift/UVOT Upper Limits
  4. GRB 120320A: MITSuME Okayama Optical upper limits
  5. GRB 120320A: BOOTES-4 optical upper limit
  6. Konus-Wind observation of GRB 120316A
  7. IPN Triangulation of GRB 120316A
  8. GRB 120320A: MASTER optical observations
  9. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  10. GRB 120312A: Gemini and UKIRT imaging
  11. GRB 120311A: C88 optical limits
  12. GRB 120312A: MASTER-NET optical observations
  13. GROND observations of GRB 120311A
  14. GRB 120311A: Swift/UVOT Upper Limits
  15. GRB 120308A: Further PAIRITEL NIR Observations
  16. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  17. GRB 120308A: Swift/UVOT Detection
  18. GRB 120308A: PAIRITEL NIR observations
  19. GRB 120302A: Fermi GBM Observation
  20. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  21. GRB 120302A: GROND detection of an afterglow candidate
  22. GRB 111222A: Swift observation on 2012 February 06/07
  23. Konus-Wind observation of GRB 120226A
  24. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  25. GRB 120226A: Fermi-LAT data analysis
  26. IPN Triangulation of GRB 120226A
  27. GRB 120224A: VLT/X-shooter observations
  28. GRB 120224A: optical observation in Mondy observatory
  29. GRB 120226A: Fermi-LAT detection of a burst
  30. GRB 120224A: GROND detection of the afterglow candidate
  31. GRB 120219A: 1.23m CAHA optical observations
  32. GRB 120219A, optical observations
  33. GRB120219A: Keck Observations
  34. GRB 120219A: MITSuME Okayama Optical upper limits
  35. GRB 120215A: Swift/UVOT Upper Limits
  36. GRB 120215A: MITSuME Okayama Optical upper limits
  37. Fermi GBM detection of an SGR-like burst
  38. Skynet/PROMPT observations of GRB120215A
  39. GRB 120212A: MITSuME Ishigakijima Optical Observation
  40. GRB 120211A: GROND Upper limits
  41. Swift detection of a burst from LS I +61 303
  42. GRB 120202A: GROND observations
  43. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  44. GRB 111228A: Possible host detected by Swift/UVOT
  45. Konus-Wind observation of GRB 120129A
  46. GRB 120118B: optical upper limit
  47. GRB 120119A: GRT detection of early afterglow
  48. GRB 111225A: optical observations
  49. GRB 120119A: TAROT La Silla observatory optical observations
  50. GRB 120119A: optical observations
  51. Konus-Wind observation of GRB 120119A
  52. GRB 120119A: Lick 3m Spectroscopy
  53. GRB 120119A: PROMPT optical observation of early afterglow
  54. GRB 120119A: PAIRITEL NIR Detection
  55. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  56. GRB 120116A: Mondy optical observations
  57. GRB 120107A: Suzaku WAM observation of the prompt emission
  58. GRB 120106A: MITSuME Okayama Optical Observation (update)
  59. Konus-Wind observation of GRB 120107A
  60. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  61. GRB 111222A: Fermi GBM observations
  62. GRB 111222A: Second Swift observation
  63. GRB 120102A: Fermi GBM observation
  64. Konus-Wind observation of GRB 120102A
  65. Konus-Wind observation of GRB 111228A
  66. GRB 111229A: Gemini-South Redshift
  67. GRB 111228A: P60 Observations
  68. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  69. GRB111228A: TNG spectroscopy analysis
  70. GRB 111228A: PAIRITEL NIR Detection
  71. GRB 111228A: TAROT La Silla observatory observations
  72. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  73. GRB 111228A: optical observations
  74. GRB 111228A: Fermi GBM observation
  75. GRB111228A: MITSuME Okayama Optical Observation
  76. GRB 111225A, optical observations
  77. GRB 111225A: Keck/LRIS Afterglow Photometry
  78. GRB 111222A : Suzaku WAM observation of the prompt emission
  79. GRB 111225A: PAIRITEL NIR Upper Limits
  80. GRB111225A: MITSuME Okayama optical upper limits
  81. GRB 111222A: Xinglong TNT observation
  82. GRB 111222A: Swift/UVOT Observations
  83. Konus-Wind observation of GRB 111222A
  84. GRB 111215A: EVLA observations
  85. GRB 110820A: optical observations in Maidanak observatory
  86. GRB 111215B: Suzaku WAM observation of the prompt emission
  87. GRB 111211A: optical ovservations at Mt. Terskol observatory
  88. Konus-Wind observation of GRB 111215B
  89. GRB 111205A: Confirmation of X-ray Afterglow
  90. GRB 111215A: TNG K-band observations
  91. GRB 111215A: GMG optical upper limit
  92. GRB 111211A: Swift/UVOT Detection
  93. Konus-Wind observation of GRB 111211A
  94. GRB 111211A: SuperAGILE localization of a long GRB
  95. Konus-Wind observation of GRB 111209A
  96. GRB 111209A: Rebrightening seen by GROND
  97. GRB 111209A: GROND Afterglow observations
  98. GRB 111209A: Faulkes Telescope North observations
  99. GRB 111209A: REM NIR detection
  100. GRB 111207A found in ground analysis of BAT data

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