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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"

16119 results found.

  1. GRB 130623A: GROND detection of the optical/NIR afterglow
  2. GRB 130806A: MITSuME Akeno Optical observation
  3. GRB 130806A: MITSuME Okayama upper limits
  4. GRB 130803A: RATIR Optical and NIR Observations
  5. GRB 130803A: Swift/UVOT Upper Limits
  6. GRB 130603B: Second epoch of HST WFC/F160W imaging
  7. GRB 130727A: Watcher optical limit
  8. GRB 130722A: RATIR Optical Observations
  9. GRB 130727A: Swift/UVOT Detection
  10. GRB 130727A: Faulkes Telescope South optical afterglow
  11. GRB130725B: REM-ROS2 optical observations
  12. GRB 130725A: Swift/UVOT Upper Limits
  13. GRB 130725A - Faulkes Telescope South Observations
  14. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  15. GRB 130725A: MITSuME Ishigakijima Optical Observation
  16. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  17. GRB 130722A: Swift/UVOT Detection
  18. GRB 130722A: MITSuME Okayama upper limits
  19. GRB 130722A: Skynet/GORT observations
  20. GRB 130722A: Faulkes Telescope South optical candidate
  21. GRB 130702A : Xinglong TNT continue optical observation
  22. GRB 130716A: Gemini-North imaging
  23. GRB 130716A: UVOT Upper Limits
  24. GRB 130702A: Maidanak optical observations
  25. GRB 130708A: Swift XRT and UVOT Observations
  26. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  27. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  28. GRB 130702A: Maidanak optical observations
  29. GRB130702A: NOT observation - the detection of an emerging supernova
  30. GRB 130702A: Continued RATIR Optical and NIR Observations
  31. GRB 130702A: Xinglong TNT optical observation
  32. GRB 130702A: VLA detection
  33. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  34. GRB 130702A: WSRT radio detection
  35. Konus-Wind observation of GRB 130702A
  36. GRB 130702A: further TNG observations
  37. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  38. GRB 130702A: RATIR Optical and NIR Observations
  39. GRB 130702A: CARMA 3mm detection
  40. GRB 130702A: NOT optical observations
  41. GRB 130702A: TNG optical observations
  42. GRB 130702A / Fermi394416326 : Nanshan optical observations
  43. IPN localization of GRB 130702A (= Fermi 394416326)
  44. Fermi GRB 130702A: Swift XRT and UVOT observations
  45. GRB 130702A / Fermi394416326: Fermi GBM detection
  46. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  47. Fermi GBM trigger 394416326: MASTER early optical limit
  48. Fermi394416326: FTN detection
  49. Fermi394416326: iPTF detection of a possible optical afterglow
  50. GRB 130701A: MITSuME Akeno Optical observation
  51. GRB 130701A: optical afterglow from the NOT
  52. GRB 130627B: Swift/UVOT Upper Limits
  53. GRB 130627A: Swift/UVOT Upper Limits
  54. GRB 130626A: KAIT Optical Observations
  55. GRB 130626A: RATIR Optical Observations
  56. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  57. GRB 130625A: MASTER afterglow limit
  58. GRB 130625A: Swift/UVOT Upper Limits
  59. GRB 130625A: Nanshan optical upper limit
  60. GRB 130603B: First epoch of XMM-Newton observations
  61. Swift Trigger 558631: AAO optical observations
  62. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  63. GRB 130615A: Continued Skynet/PROMPT Observations
  64. GRB 130610A: TAROT La Silla observatory optical observations
  65. GRB 130610A: CrAO optical observations
  66. GRB 130615A: Zadko observatory - Gingin optical observations
  67. GRB 130615A: TAROT La Silla observatory optical observations
  68. GRB 130615A: Swift/UVOT Upper Limits
  69. GRB 130615A: Skynet/PROMPT Observations
  70. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  71. GRB 130612A: iTelescope T21 optical observations
  72. GRB 130610A: iTelescope T21 optical observations
  73. GRB 130612A: ISON-NM optical observations
  74. GRB 130612A: MITSuME Okayama upper limits
  75. GRB 130612A: Zadko observatory - Gingin optical observations
  76. GRB 130612A: TAROT La Silla observatory optical observations
  77. GRB 130612A: RATIR Optical Observations
  78. GRB 130612A: P60 Observations
  79. GRB 130612A: NOT optical observations
  80. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  81. GRB 130612A: PAIRITEL NIR Afterglow Observations
  82. GRB 130612A: Swift detection of a burst with an optical counterpart
  83. GRB 130606A: CrAO optical upper limit
  84. GRB 130609A: Radio Observations (5.8, 22 and 85 GHz)
  85. GRB 130608A: ISON-Kislovodsk optical upper limit
  86. GRB 130610A: ISON-NM optical observations
  87. GRB 130606B: Swift/UVOT Upper Limit
  88. GRB 130610A: LOAO BVR Observation
  89. GRB 130610A: P60 Observations
  90. GRB 130610A: PAIRITEL NIR Afterglow Observations
  91. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  92. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  93. GRB 130610A: Swift detection of a burst with an optical counterpart
  94. GRB 130609B: Swift detection of a burst with an optical counterpart
  95. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  96. GRB 130608A: RATIR Optical and NIR Observations
  97. GRB 130609A: RATIR Optical and NIR Observations
  98. GRB 130606A: Continued Skynet/PROMPT observations
  99. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  100. GRB 130606B: RATIR Optical and NIR Observations

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