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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28100 results found.

  1. GRB071112C MITSuME Okayama Optical Observation
  2. GRB 071112C: Swift-BAT refined analysis
  3. GRB 071112C: Swift XRT refined analysis
  4. Swift UVOT upper limits of GRB071112B
  5. GRB 071112B: Gemini Optical Imaging
  6. GRB 071112B: Swift-XRT preliminary analysis
  7. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  8. GRB 071112C : Lulin R-band observation
  9. GRB 071112C: TAROT Calern observatory optical observations
  10. Swift XRT follow-up observations of GRB071028B
  11. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  12. GRB 071112C: Optical and NIR afterglows observed with KANATA
  13. GRB 071112C: Swift detection of a burst with an optical counterpart
  14. GRB 071112B: Swift detection of a short hard burst
  15. GRB 071112: Swift detection of a possible burst
  16. Swift/UVOT initial analysis of GRB071109
  17. GRB 071109: further Swift-XRT analysis
  18. GRB 071109: TAROT Calern observatory optical observations
  19. GRB 071109: Swift-XRT possible X-ray counterpart
  20. GRB 071109: IBIS refined analysis
  21. GRB 071104: Swift-XRT Team Refined Analysis
  22. GRB 071104: Possible Swift UVOT Afterglow Candidate
  23. GRB 071104: Swift-XRT position
  24. GRB 071104: Gamma Ray Burst Localization by SuperAGILE
  25. Swift XRT and UVOT observations of GRB071028B
  26. GRB 071101, Swift-BAT refined analysis
  27. GRB 071101: Swift-XRT Team refined analysis
  28. GRB071101: Optical and NIR upper limits by KANATA
  29. GRB0711101: Two new source from Xinglong TNT observation
  30. GRB 071101: TAROT Calern observatory optical observations
  31. GRB071101 LOAO B,V,R,I observation
  32. GRB 071101: Swift detection of a burst
  33. GRB 071031, Swift-BAT refined analysis
  34. GRB 071031: Swift-XRT Team refined analysis
  35. GRB 071020: MITSuME Akeno optical observations
  36. GRB 071031: REM NIR and Optical observation
  37. GRB 071031: Swift detection of a burst with an optical counterpart
  38. GRB 071028B Swift-BAT detection of a burst
  39. GRB 071028: SARA observations of variable source
  40. Swift UVOT upper limits to GRB071028
  41. GRB071028: Xinglong EST V-band upper limit
  42. GRB 071028: Swift-XRT Team refined analysis
  43. GRB 071028, Swift-BAT refined analysis
  44. GRB 071028: Swift detection of a burst
  45. GRB 071003: Infrared Photometry with Keck Adaptive Optics
  46. GRB071021: MARGE Optical Limits
  47. GRB071020, optical upper limit
  48. GRB 071025: SARA VRI upper limits
  49. Swift UVOT upper limits
  50. GRB071025: Xinglong TNT I-band upper limit
  51. GRB 071025: Swift-XRT Team refined analysis
  52. GRB 060602A: host redshift
  53. GRB 071025, Swift-BAT refined analysis
  54. GRB071021 : CFHT Ks-band observation
  55. GRB 071025: ROTSE-III Refined Analysis
  56. GRB 071025a: PAIRITEL observations
  57. GRB 071025: ROTSE-III Detection of Optical Counterpart
  58. GRB 071025: Swift detection of a burst
  59. GRB 071021: R-band detection and analysis
  60. Possible radio detection of GRB 071021 with the VLA
  61. GRB 071021: (Relatively shallow) IR non-detections; motivation for optical spectroscopy
  62. GRB 071020: SARA observations
  63. Radio detection of GRB 071020 with the VLA
  64. GRB071021: MITSuME Okayama Optical Upper Limits
  65. GRB 071021: Z-band detection
  66. GRB 071021: optical and NIR observations
  67. GRB 071021: possible high-z burst
  68. GRB 071021, Swift-BAT refined analysis
  69. GRB071018: 2nd epoch obsevations of Xinglong TNT
  70. GRB 071021: Swift-XRT Team refined analysis
  71. GRB 071021: Xinglong TNT optical Upper Limit
  72. GRB 071021 : Lulin R-band limit
  73. GRB 071021: Swift detection of a burst
  74. GRB071020A: Xinglong TNT Optical afterglow observations
  75. GRB 071020: Swift-XRT refined analysis
  76. GRB 071020, Swift-BAT refined analysis
  77. GRB 071020A: IR Imaging with PAIRITEL
  78. GRB 071020: ROTSE-III Analysis of Optical Counterpart
  79. GRB071020 - SDSS Pre-burst Observations
  80. GRB 071020: Swift detection of a bright burst
  81. GRB 071020A: ROTSE-III Detection of Optical Counterpart
  82. GRB 071018: Mercator Telescope optical observations
  83. Swift autonomous slewing re-enabled
  84. GRB 071018: SARA observations
  85. GRB 071018: Swift-XRT observation
  86. GRB 071017 - Swift XRT observations
  87. GRB 071018: Possible OT from Xinglong TNT observation
  88. GRB 071010B: Light Curve Break Confirmed
  89. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  90. GRB 071018, Swift-BAT refined analysis
  91. GRB 071010B: Suzaku WAM observation of the prompt emission
  92. GRB 071013: 3rd TLS Epoch - constraints on variability
  93. GRB 071013: TLS 2nd epoch - Kornienko candidate constant
  94. GRB 071010B: Optical observations of EST
  95. GRB 071011: MITSuME Optical Observations
  96. GRB 070920A: deep optical observations at the NOT
  97. GRB 071010B: Keck/LRIS Photometry
  98. GRB 071013: TLS Upper Limit
  99. VLA non-detection of GRB 071011
  100. GRB 071013: Optical observations

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