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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"

26128 results found.

  1. GRB 071112C: optical observation
  2. GRB 071112C: optical observation
  3. GRB 071112C: emission lines and refined VLT redshift
  4. GRB 071112C: SARA upper limit
  5. GRB 071112C : Second Epoch Lulin R-band observations
  6. GRB071112C MITSuME Okayama Optical Observation
  7. GRB 071112C: Swift-BAT refined analysis
  8. GRB 071112C: Swift/UVOT observations
  9. GRB 071112C: Swift XRT refined analysis
  10. GRB 071112C: Optical observations at Crni Vrh
  11. Swift UVOT upper limits of GRB071112B
  12. GRB 071112C: VLT redshift
  13. GRB 071112B: Gemini Optical Imaging
  14. GRB 071112B: Swift-XRT preliminary analysis
  15. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  16. GRB071112C: NOT observations
  17. GRB 071112C: Palomar Pre-Imaging
  18. Swift-BAT trigger 296491 is not a GRB
  19. GRB 071112C : Lulin R-band observation
  20. GRB 071112C: TAROT Calern observatory optical observations
  21. Swift XRT follow-up observations of GRB071028B
  22. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  23. GRB 071112C: Optical and NIR afterglows observed with KANATA
  24. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  25. GRB 071112B: ROTSE-III Rapid Optical Limits
  26. GRB 071112C: Swift detection of a burst with an optical counterpart
  27. GRB 071112B: Swift detection of a short hard burst
  28. GRB 071112: Swift detection of a possible burst
  29. GRB071109: Super-LOTIS observations
  30. VLA IInd observation of INTEGRAL burst GRB 071109
  31. Swift/UVOT initial analysis of GRB071109
  32. GRB 071109: further Swift-XRT analysis
  33. No radio detection at Swift-XRT position
  34. GRB 071109: Swift-XRT possible X-ray counterpart
  35. VLA prompt radio detection of the INTEGRAL burst 071109
  36. GRB 071104: Swift-XRT Team Refined Analysis
  37. GRB 071104: Possible Swift UVOT Afterglow Candidate
  38. GRB 071104: Swift-XRT position
  39. GRB071010b: optical observation
  40. Swift XRT and UVOT observations of GRB071028B
  41. GRB 071101, Swift-BAT refined analysis
  42. GRB 071101: Swift-XRT Team refined analysis
  43. GRB071101: Optical and NIR upper limits by KANATA
  44. GRB0711101: Two new source from Xinglong TNT observation
  45. GRB 071101: TAROT Calern observatory optical observations
  46. GRB 071101: Swift XRT position
  47. GRB 071101: BOOTES-2 prompt optical observations
  48. GRB 071101: a nearby galaxy
  49. GRB 071101: Swift detection of a burst
  50. GRB 071031, Swift-BAT refined analysis
  51. GRB 071031: Swift/UVOT detection of afterglow
  52. GRB 071031: Swift-XRT Team refined analysis
  53. GRB 071020: MITSuME Akeno optical observations
  54. GRB 071031: REM NIR and Optical observation
  55. GRB 071031, SMARTS afterglow observations
  56. GRB 071031: VLT high-resolution spectroscopy
  57. GRB071031: Rapid PROMPT Detections
  58. GRB 071031: GROND detection in all bands
  59. GRB 071031: Swift detection of a burst with an optical counterpart
  60. GRB 071028B Swift-BAT detection of a burst
  61. GRB071025: Optical+NIR observations
  62. GRB 071028: SARA observations of variable source
  63. Swift UVOT upper limits to GRB071028
  64. GRB071028: Xinglong EST V-band upper limit
  65. GRB 071028: Swift-XRT Team refined analysis
  66. GRB 071028, Swift-BAT refined analysis
  67. GRB 071028: Swift detection of a burst
  68. GRB 071025: Kuiper Telescope Optical Observations
  69. GRB 071003: Infrared Photometry with Keck Adaptive Optics
  70. GRB 071018: Revised BAT position
  71. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  72. GRB071021: MARGE Optical Limits
  73. GRB071020, optical upper limit
  74. GRB 071025: SARA VRI upper limits
  75. GRB 071025 Milagro GeV/TeV Observations
  76. GRB 071025: SQIID JHK photometry
  77. GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays
  78. Swift UVOT upper limits
  79. GRB071025: Xinglong TNT I-band upper limit
  80. GRB 071025: Swift-XRT Team refined analysis
  81. GRB 071025, Swift-BAT refined analysis
  82. GRB 071025: Early Super-LOTIS Observations
  83. GRB 071025: R/I-band update
  84. GRB071021 : CFHT Ks-band observation
  85. GRB 071025: ROTSE-III Refined Analysis
  86. GRB 071025: I-detection, R-dropout?
  87. GRB 071025: Swift XRT refined position
  88. GRB071025: REM NIR afterglow
  89. GRB 071025: ROTSE-III Detection of Optical Counterpart
  90. GRB 071025: Swift detection of a burst
  91. GRB 071021: R-band detection and analysis
  92. GRB 071020: BTA spectroscopy
  93. GRB071021: Optical+NIR observations
  94. Possible radio detection of GRB 071021 with the VLA
  95. Optical observations of GRB 071020
  96. GRB 071021: (Relatively shallow) IR non-detections; motivation for optical spectroscopy
  97. GRB 071020: SARA observations
  98. Radio detection of GRB 071020 with the VLA
  99. GRB071010b: optical observation
  100. GRB 071021: Subaru NIR observation

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