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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"

21089 results found.

  1. GRB 071122: P60 Optical Afterglow Candidate
  2. GRB 071122: ROTSE-III Optical Limits
  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. Konus-Wind and Konus-A observations of GRB 071117
  9. Swift XRT follow-up observations of GRB071008
  10. Swift/UVOT upper limits for GRB 071117
  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 071117: Gemini Observations
  16. GRB 071117: Las Campanas optical observations
  17. VLT FORS2 observations of short hard GRB071112B
  18. GRB 071117: Initial Swift/UVOT observations
  19. GRB 071117: Swift detection of a bright burst
  20. VLA radio upper limit on GRB 071112C
  21. ATCA radio observations of short hard burst GRB 071112B
  22. GRB 071112C: Optical and NIR data observed with KANATA
  23. GRB 071112C: WSRT Radio Observations
  24. GRB 071112C: optical observation
  25. GRB 071112C: Gemini Absorption Redshift
  26. GRB 071112B: 2nd epoch of Magellan i-band imaging
  27. GRB 071112C : Second Epoch Lulin R-band observations
  28. GRB071112C MITSuME Okayama Optical Observation
  29. GRB 071112C: Swift/UVOT observations
  30. GRB 071112C: Optical observations at Crni Vrh
  31. Swift UVOT upper limits of GRB071112B
  32. GRB 071112B: Magellan i-band imaging
  33. GRB 071112B: Gemini Optical Imaging
  34. GRB071112C: NOT observations
  35. GRB 071112C : Lulin R-band observation
  36. GRB 071112C: RTT150 optical observations
  37. GRB 071112C: TAROT Calern observatory optical observations
  38. Swift XRT follow-up observations of GRB071028B
  39. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  40. GRB 071112C: Optical and NIR afterglows observed with KANATA
  41. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  42. GRB071109: Super-LOTIS observations
  43. VLA IInd observation of INTEGRAL burst GRB 071109
  44. GRB 071109: further Swift-XRT analysis
  45. GRB 071109: TAROT Calern observatory optical observations
  46. No radio detection at Swift-XRT position
  47. GRB 071109: Swift-XRT possible X-ray counterpart
  48. VLA prompt radio detection of the INTEGRAL burst 071109
  49. GRB 071109: BOOTES-2 prompt optical observations
  50. Swift XRT and UVOT observations of GRB071028B
  51. GRB071101: Optical and NIR upper limits by KANATA
  52. GRB 071101: TAROT Calern observatory optical observations
  53. GRB 071101: BOOTES-2 prompt optical observations
  54. GRB 071020: MITSuME Akeno optical observations
  55. GRB 071031: REM NIR and Optical observation
  56. GRB 071031, SMARTS afterglow observations
  57. GRB 071031: VLT high-resolution spectroscopy
  58. GRB071025: Optical+NIR observations
  59. GRB 071028: SARA observations of variable source
  60. Swift UVOT upper limits to GRB071028
  61. GRB071028: Xinglong EST V-band upper limit
  62. GRB 071025: Kuiper Telescope Optical Observations
  63. GRB 071003: Infrared Photometry with Keck Adaptive Optics
  64. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  65. GRB 071025: SARA VRI upper limits
  66. GRB 071025 Milagro GeV/TeV Observations
  67. GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays
  68. Swift UVOT upper limits
  69. GRB 071025: Early Super-LOTIS Observations
  70. GRB071021 : CFHT Ks-band observation
  71. GRB 071025: ROTSE-III Refined Analysis
  72. GRB 071025a: PAIRITEL observations
  73. GRB071025: REM NIR afterglow
  74. GRB 071025: ROTSE-III Detection of Optical Counterpart
  75. GRB071021: Optical+NIR observations
  76. Possible radio detection of GRB 071021 with the VLA
  77. Optical observations of GRB 071020
  78. GRB 071021: (Relatively shallow) IR non-detections; motivation for optical spectroscopy
  79. GRB 071020: SARA observations
  80. Radio detection of GRB 071020 with the VLA
  81. GRB 071021: Subaru NIR observation
  82. GRB071021: MITSuME Okayama Optical Upper Limits
  83. GRB 071021: Magellan i-band observation
  84. GRB 071021: Magellan R-band observation
  85. GRB 071020: Fading slowly?
  86. GRB 071010B: Fading quickly
  87. GRB 071021: optical and NIR observations
  88. GRB 071021: possible high-z burst
  89. GRB 071021 : Lulin R-band limit
  90. GRB 071021: Faulkes Telescope South optical candidate
  91. GRB 071010B: Independent Confirmation of Break
  92. GRB071020A: Xinglong TNT Optical afterglow observations
  93. GRB 071020: Swift-XRT refined analysis
  94. GRB071020 - SDSS Pre-burst Observations
  95. GRB 071020A: ROTSE-III Detection of Optical Counterpart
  96. GRB 071018: Mercator Telescope optical observations
  97. Swift autonomous slewing re-enabled
  98. GRB071010b: optical observations
  99. GRB 071018: SARA observations
  100. GRB 071018: Swift-XRT observation

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