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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"

24474 results found.

  1. GRB 120119A: TAROT La Silla observatory optical observations
  2. GRB 120119A: optical observations
  3. GRB 120119A: SMARTS optical/IR afterglow observations
  4. GRB 120119A: Fermi GBM observation
  5. GRB 120118B, Swift-BAT refined analysis
  6. Konus-Wind observation of GRB 120119A
  7. GRB 120118B: TNG NIR observations
  8. GRB 120119A: Liverpool Telescope afterglow detection
  9. GRB 120119A: PAIRITEL NIR Detection
  10. GRB 120118B: Faulkes Telescope South observations
  11. GRB 120118B: MASTER optical observations
  12. XRF 120118A: Optical candidate
  13. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  14. GRB 120116A: Gemini optical/IR candidate
  15. GRB 120116A: Swift-BAT refined analysis
  16. GRB 120116A: IAC80 I-band observations
  17. GRB 120116A: MASTER Early optical limit
  18. GRB 120116A: Swift detection of a burst
  19. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  20. GRB 120107A: Suzaku WAM observation of the prompt emission
  21. GRB 120107A: Fermi GBM observation
  22. GRB 120106A: MITSuME Okayama Optical Observation (update)
  23. Konus-Wind observation of GRB 120107A
  24. GRB 120106A: MITSuME Okayama Ks-band upper limit
  25. GRB 120106A: MASTER Early OT marginally detection
  26. GRB 120106A: Swift-BAT refined analysis
  27. GRB 120106A: MITSuME Okayama Optical upper limits
  28. GRB 120106A: MASTER-Tunka optical observations
  29. GRB 120106A: Swift detection of a burst
  30. GRB111228A :LOAO R-band Observations
  31. GRB 111222A: Fermi GBM observations
  32. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  33. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  34. GRB 111211A: Detection of the SN with the 10.4m GTC
  35. GRB 120102A: Fermi GBM observation
  36. Konus-Wind observation of GRB 120102A
  37. GRB 120102A: Swift-BAT refined analysis
  38. GRB 120102A: Swift-XRT refined Analysis
  39. GRB 111228A, optical observations
  40. GRB 111228A: LOAO Optical Observation
  41. Konus-Wind observation of GRB 111228A
  42. GRB 111228A: MASTER-Net optical photometry
  43. GRB 111228A: correction for GCN 12787
  44. GRB 111228A: Optical and NIR observations with Kanata telescope
  45. GRB 111228A: correction to GCN 12784
  46. GRB 111228A: SMARTS optical/IR afterglow observations
  47. GRB 111229A: Faulkes Telescope South observations
  48. GRB 111229A: Swift-XRT refined Analysis
  49. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  50. GRB111228A: Further GMG observations
  51. GRB 111229A: Swift-BAT refined analysis
  52. GRB 111229A: GROND afterglow candidate
  53. GRB 111229A: Swift detection of a burst
  54. GRB 111228A: Liverpool Telescope Observations
  55. GRB 111225A: Lightbuckets Optical Observations
  56. GRB 111228A: X-shooter spectroscopy
  57. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  58. GRB 111228A: GMG optical observation
  59. FERMI GRB111228.45: MASTER observations
  60. GRB 111228A: PAIRITEL NIR Detection
  61. GRB 111228A: GROND observations
  62. GRB 111228A: MASTER OT observations
  63. GRB 111228A: NOT optical observation
  64. GRB 111228A, Swift-BAT refined analysis
  65. GRB 111228A: optical observations
  66. GRB 111228A: Fermi GBM observation
  67. GRB111228A: MITSuME Okayama Optical Observation
  68. GRB 111228A: Xinglong TNT confirms the optical afterglow
  69. GRB 111228A: Swift detection of a burst with an optical counterpart
  70. GRB 111225A: Keck/LRIS Afterglow Photometry
  71. GRB 111222A : Suzaku WAM observation of the prompt emission
  72. GRB111225A: MITSuME Okayama optical upper limits
  73. GRB 111225A: 1.23m CAHA optical observations
  74. GRB 111225A: Swift-XRT refined Analysis
  75. GRB 111225A, Swift-BAT refined analysis
  76. GRBv111225A: Xinglong TNT optical afterglow
  77. GRB 111222A: Xinglong TNT observation
  78. GRB 111222A: Swift-XRT observations
  79. IPN Triangulation of GRB 111222A (short/hard/intense)
  80. XRT GRB Catalogue now live and online
  81. GRB 111215B: Suzaku WAM observation of the prompt emission
  82. Konus-Wind observation of GRB 111215B
  83. GRB 111205A: Confirmation of X-ray Afterglow
  84. IPN Triangulation of GRB 111215B (long/intense)
  85. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  86. GRB 111215A: TNG K-band observations
  87. GRB 111215A: MITSuME Okayama Optical upper limits
  88. GRB 111215A: Swift-XRT refined Analysis
  89. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  90. GRB 111215A: Swift-BAT refined analysis
  91. GRB 111215A: OSN I-band observations
  92. GRB 111215A: MASTER-Net optical prompt and follow up observations
  93. GRB 111215A, Optical Observations
  94. GRB 111215A: MITSuME Akeno Optical upper limits
  95. GRB 111215A : Xinglong TNT upper limit
  96. GRB 111211A: Swift/UVOT Detection
  97. Konus-Wind observation of GRB 111211A
  98. GRB 111211A: NOT afterglow confirmation
  99. GRB 111212A: Swift-BAT refined analysis
  100. GRB 111211A: GROND afterglow candidate

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