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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"

20516 results found.

  1. GRB 071122: P60 Optical Afterglow Candidate
  2. GRB 071122: Swift detection of a burst
  3. GRB 071118: P60 Observations
  4. GRB071118 MITSuME OAO optical observation
  5. GRB 071118: Observations from OSN
  6. GRB 071117: VLT observations and probable redshift
  7. Swift/UVOT observations of GRB071118
  8. Swift XRT follow-up observations of GRB071008
  9. Swift/UVOT upper limits for GRB 071117
  10. GRB071118: Swift XRT refined analysis
  11. GRB 071117: Gemini Optical Afterglow Discovery
  12. GRB 071118, Swift-BAT refined analysis
  13. GRB 071117: TAROT La Silla observatory optical observations
  14. GRB 071112B: Gemini Image Differencing
  15. GRB 071118: Swift detection of a burst
  16. GRB 071117: Gemini Observations
  17. VLT FORS2 observations of short hard GRB071112B
  18. Swift detection of MXB 0656-072
  19. GRB 071112C: Optical and NIR data observed with KANATA
  20. GRB 071112C: optical observation
  21. GRB 071112C: emission lines and refined VLT redshift
  22. GRB 071112C MITSuME Akeno early optical observation
  23. GRB 071112C: SARA upper limit
  24. GRB 071112C : Second Epoch Lulin R-band observations
  25. GRB071112C MITSuME Okayama Optical Observation
  26. GRB 071112C: Swift-BAT refined analysis
  27. GRB 071112C: Swift XRT refined analysis
  28. Swift UVOT upper limits of GRB071112B
  29. GRB 071112B: Gemini Optical Imaging
  30. GRB 071112B: Swift-XRT preliminary analysis
  31. GRB 071112C : Lulin R-band observation
  32. GRB 071112C: TAROT Calern observatory optical observations
  33. Swift XRT follow-up observations of GRB071028B
  34. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  35. GRB 071112C: Optical and NIR afterglows observed with KANATA
  36. GRB 071112C: Swift detection of a burst with an optical counterpart
  37. GRB 071112: Swift detection of a possible burst
  38. Swift/UVOT initial analysis of GRB071109
  39. GRB 071109: further Swift-XRT analysis
  40. GRB 071109: TAROT Calern observatory optical observations
  41. GRB 071109: Swift-XRT possible X-ray counterpart
  42. GRB 071104: Swift-XRT Team Refined Analysis
  43. GRB 071104: Possible Swift UVOT Afterglow Candidate
  44. GRB 071104: Swift-XRT position
  45. Swift XRT and UVOT observations of GRB071028B
  46. GRB 071101: Swift-XRT Team refined analysis
  47. GRB071101: Optical and NIR upper limits by KANATA
  48. GRB0711101: Two new source from Xinglong TNT observation
  49. GRB 071101: TAROT Calern observatory optical observations
  50. GRB071101 LOAO B,V,R,I observation
  51. GRB 071031: Swift-XRT Team refined analysis
  52. GRB 071020: MITSuME Akeno optical observations
  53. GRB 071031: REM NIR and Optical observation
  54. GRB 071031: Swift detection of a burst with an optical counterpart
  55. GRB 071028B Swift-BAT detection of a burst
  56. GRB 071028: SARA observations of variable source
  57. Swift UVOT upper limits to GRB071028
  58. GRB071028: Xinglong EST V-band upper limit
  59. GRB 071028: Swift-XRT Team refined analysis
  60. GRB 071028: Swift detection of a burst
  61. GRB 071003: Infrared Photometry with Keck Adaptive Optics
  62. GRB071021: MARGE Optical Limits
  63. GRB071020, optical upper limit
  64. GRB 071025: SARA VRI upper limits
  65. GRB 071025: SQIID JHK photometry
  66. Swift UVOT upper limits
  67. GRB071025: Xinglong TNT I-band upper limit
  68. GRB 071025: Swift-XRT Team refined analysis
  69. GRB071021 : CFHT Ks-band observation
  70. GRB 071025a: PAIRITEL observations
  71. GRB071025: REM NIR afterglow
  72. GRB 071025: Swift detection of a burst
  73. GRB 071021: R-band detection and analysis
  74. GRB 071020: BTA spectroscopy
  75. Possible radio detection of GRB 071021 with the VLA
  76. GRB 071021: (Relatively shallow) IR non-detections; motivation for optical spectroscopy
  77. GRB 071020: SARA observations
  78. Radio detection of GRB 071020 with the VLA
  79. GRB071021: MITSuME Okayama Optical Upper Limits
  80. GRB 071021: Z-band detection
  81. GRB071018: 2nd epoch obsevations of Xinglong TNT
  82. GRB 071021: Xinglong TNT optical Upper Limit
  83. GRB 071021 : Lulin R-band limit
  84. GRB 071021: Swift detection of a burst
  85. GRB071020A: Xinglong TNT Optical afterglow observations
  86. GRB 071020A: IR Imaging with PAIRITEL
  87. GRB071020 - SDSS Pre-burst Observations
  88. GRB 071020: Swift detection of a bright burst
  89. GRB 071018: Mercator Telescope optical observations
  90. GRB 071018: SARA observations
  91. GRB 071018: Swift-XRT observation
  92. GRB 071017 - Swift XRT observations
  93. GRB 071018: Possible OT from Xinglong TNT observation
  94. GRB 071010B: Light Curve Break Confirmed
  95. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  96. GRB 071018, Swift-BAT refined analysis
  97. GRB 071013: 3rd TLS Epoch - constraints on variability
  98. GRB 071013: TNT optical data refined analysis
  99. GRB 071013: TLS 2nd epoch - Kornienko candidate constant
  100. GRB 071011: MITSuME Optical Observations

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