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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"

24519 results found.

  1. GRB120219A: Keck Observations
  2. GRB 120215A: MITSuME Akeno Optical upper limits
  3. GRB 120219A: MITSuME Okayama Optical upper limits
  4. GRB 120219A: Swift-BAT refined analysis
  5. GRB120219A: TNT optical afterglow candidates
  6. GRB 120219A: MASTER-NET prompt and early optical observations
  7. GRB 120219A: Swift detection of a burst
  8. GRB 120218A: Swift-BAT refined analysis
  9. GRB 120218A: Swift detection of a burst
  10. GRB 120215A: MITSuME Okayama Optical upper limits
  11. Fermi GBM detection of an SGR-like burst
  12. GRB 120215A: Swift-BAT refined analysis
  13. GRB 120211A : LOAO optical observations
  14. GRB 120213A: Swift-XRT refined Analysis
  15. GRB 120212A: Fermi GBM observation
  16. GRB 120212A: GMG optical observation
  17. GRB 120212A: MITSuME Ishigakijima Optical Observation
  18. GRB 120213A: Swift-BAT refined analysis
  19. GRB 120213A: MASTER-NET early optical observations
  20. GRB 120212A: NOT optical observation
  21. GRB 120212A: Swift-BAT refined analysis
  22. GRB 120211A: MITSuME Okayama Ks-band Observation
  23. GRB 120211A: GROND Upper limits
  24. GRB 120212A: Swift detection of a burst
  25. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  26. GRB 120211A, optical observations
  27. GRB 120211A: MASTER early optical observations
  28. GRB 120211A: Swift-BAT refined analysis
  29. GRB 120211A: MITSuME Okayama Ks-band upper limit
  30. GRB 120211A - Faulkes Telescope South Observations
  31. GRB 120202A: MASTER early optical observations
  32. LS I +61 303: Swift-BAT refined analysis
  33. GRB 120202A: GROND observations
  34. GRB 120202A: Swift/XRT and UVOT observations
  35. GRB 120202A: A long GRB detected by INTEGRAL
  36. GRB 111228A: Possible host detected by Swift/UVOT
  37. GRB 120129A: MASTER optical observations
  38. Konus-Wind observation of GRB 120129A
  39. IPN Triangulation of GRB 120129A (long/intense)
  40. GRB 120127A / P48 Imaging
  41. GRB 120127A: MASTER optical observations
  42. GRB 120119A : LOAO Optical Observations
  43. GRB 120119A: GRT detection of early afterglow
  44. GRB 120121A: Swift-BAT refined analysis
  45. GRB 120119A, Swift-BAT refined analysis
  46. GRB 120119A: TAROT La Silla observatory optical observations
  47. GRB 120119A: optical observations
  48. GRB 120119A: SMARTS optical/IR afterglow observations
  49. GRB 120119A: Fermi GBM observation
  50. GRB 120118B, Swift-BAT refined analysis
  51. Konus-Wind observation of GRB 120119A
  52. GRB 120118B: TNG NIR observations
  53. GRB 120119A: Liverpool Telescope afterglow detection
  54. GRB 120119A: PAIRITEL NIR Detection
  55. GRB 120118B: Faulkes Telescope South observations
  56. GRB 120118B: MASTER optical observations
  57. XRF 120118A: Optical candidate
  58. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  59. GRB 120116A: Gemini optical/IR candidate
  60. GRB 120116A: Swift-BAT refined analysis
  61. GRB 120116A: IAC80 I-band observations
  62. GRB 120116A: MASTER Early optical limit
  63. GRB 120116A: Swift detection of a burst
  64. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  65. GRB 120107A: Suzaku WAM observation of the prompt emission
  66. GRB 120107A: Fermi GBM observation
  67. GRB 120106A: MITSuME Okayama Optical Observation (update)
  68. Konus-Wind observation of GRB 120107A
  69. GRB 120106A: MITSuME Okayama Ks-band upper limit
  70. GRB 120106A: MASTER Early OT marginally detection
  71. GRB 120106A: Swift-BAT refined analysis
  72. GRB 120106A: MITSuME Okayama Optical upper limits
  73. GRB 120106A: MASTER-Tunka optical observations
  74. GRB 120106A: Swift detection of a burst
  75. GRB111228A :LOAO R-band Observations
  76. GRB 111222A: Fermi GBM observations
  77. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  78. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  79. GRB 111211A: Detection of the SN with the 10.4m GTC
  80. GRB 120102A: Fermi GBM observation
  81. Konus-Wind observation of GRB 120102A
  82. GRB 120102A: Swift-BAT refined analysis
  83. GRB 120102A: Swift-XRT refined Analysis
  84. GRB 111228A, optical observations
  85. GRB 111228A: LOAO Optical Observation
  86. Konus-Wind observation of GRB 111228A
  87. GRB 111228A: MASTER-Net optical photometry
  88. GRB 111228A: correction for GCN 12787
  89. GRB 111228A: Optical and NIR observations with Kanata telescope
  90. GRB 111228A: correction to GCN 12784
  91. GRB 111228A: SMARTS optical/IR afterglow observations
  92. GRB 111229A: Faulkes Telescope South observations
  93. GRB 111229A: Swift-XRT refined Analysis
  94. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  95. GRB111228A: Further GMG observations
  96. GRB 111229A: Swift-BAT refined analysis
  97. GRB 111229A: GROND afterglow candidate
  98. GRB 111229A: Swift detection of a burst
  99. GRB 111228A: Liverpool Telescope Observations
  100. GRB 111225A: Lightbuckets Optical Observations

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