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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"

20502 results found.

  1. GRB 071011: Confirmation of P60 optical afterglow
  2. GRB 071010B: Optical Detection
  3. GRB 071011: Kanazawa Optical limits
  4. GRB 071011: P60 Optical Afterglow Candidate
  5. GRB 071011: MARGE Optical Limits
  6. GRB 071010B: Super-LOTIS upper limit
  7. GRB 071010B optical photometry
  8. GRB 071011: XRT afterglow detection
  9. GRB 071011: NAYUTA Optical Observation
  10. GRB 071010A: Continued Keck Imaging
  11. GRB 071010B: Bright OT confirmed with TLS
  12. Optical Observation: GRB 071010
  13. Optical observations: GRB 071010A
  14. GRB071010B: Swift/XRT detection
  15. GRB 071010A: Keck/LRIS Photometry
  16. GRB 071010 REM NIR observations
  17. GRB 071010: TAROT La Silla observatory detection of the afterglow
  18. Radio detection of GRB 071003 with the VLA
  19. GRB 070810B: further XRT analysis
  20. Konus-Wind observation of GRB 071003
  21. GRB 071003: Possible rebrightening
  22. GRB 071003 : Lulin R-band observations
  23. GRB 071003: OA power-law decay indices from KAIT
  24. GRB 071003: P60 Confirmation of Optical Afterglow
  25. Faulkes Telescope South observations of GRB 071001
  26. GRB 071001: Swift detection of a burst
  27. VLA observation of GRB 070923
  28. GRB 070911, SMARTS optical/IR afterglow observations
  29. GRB070925: Swift-XRT Afterglow confirmation
  30. GRB 070925: Gemini South Imaging
  31. GRB 070920B: ROTSE-III Early Optical Limits
  32. GRB 070920B: TAROT La Silla observatory optical observations
  33. INTEGRAL ToO observations of SGR1806-20
  34. GRB 070920B: NOT optical observations
  35. GRB 070920: TAROT Calern observatory optical observations
  36. SGR1806-20: Swift-BAT detection of enhanced activity
  37. GRB 070917: P60 Observations
  38. GRB 070917: MITSuME Akeno Ic upper limit
  39. GRB 070917: R band observations
  40. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  41. GRB 070809: The Swift evidence for the SHB nature of this burst
  42. GRB 070913: Swift-BAT refined analysis
  43. GRB 070913: SMARTS optical/IR observations
  44. GRB 070913: TAROT La Silla observatory optical observations
  45. Swift-BAT Notices back to autonomous real-time distribution
  46. GRB 070911: PAIRITEL IR Observations
  47. GRB 070911: Swift detection of a burst
  48. GRB 070809: Confirmation of optical transient
  49. Candidate Orphan GRB Optical Transient in IC 4779
  50. Las Campanas observations of possible TAROT GRB transient near IC
  51. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  52. GRB 070824 - Combined SuperAGILE/IPN Localization
  53. Konus-Wind observation of very bright GRB 070821
  54. GRB 070731: Swift/UVOT Upper Limit
  55. IPN Localization of GRB 070821 (long, very bright)
  56. GRB 070805: UVOT afterglow candidate retraction
  57. GRB 070810A: ROTSE-III Refined Analysis
  58. GRB 070810B : Faulkes Telescope South Observations
  59. GRB 070810A: Continued Keck Imaging
  60. GRB 070810B: Keck spectroscopy of possible host galaxies
  61. GRB070810B: Swift/UVOT Upper Limits
  62. GRB 070810B: XRT refined analysis
  63. GRB 070810B: Xinglong TNT optical Upper Limit
  64. GRB070810B: Optical observations with KANATA
  65. A giant outburst from Cygnus X-1 detected by Konus-Wind and Suzaku-WAM
  66. GRB 070809: Swift/UVOT Upper Limits
  67. VLA upper limit on the short hard burst GRB 070729
  68. No radio detection in superAGILE burst 070724B
  69. GRB 070809: Keck Imaging
  70. GRB 070810: enhanced Swift-XRT position
  71. GRB 070810: Swift/UVOT Optical Counterpart
  72. GRB 070808: Swift/UVOT upper limits
  73. GRB 070809: Swift detection of a short burst
  74. GRB 070808 : Faulkes Telescope South Observations
  75. GCN Swift XRT update position notices and enhanced position circulars
  76. GRB 070808: Swift XRT refined analysis
  77. GRB 070808: Xinglong TNT optical Upper Limit
  78. GRB070808: Optical observations with KANATA
  79. GRB070808 - SDSS Pre-Burst Observations
  80. GRB 070808: ROTSE-III Optical Limits
  81. GRB070805 XRT and UVOT afterglow candidate
  82. GRB070612A: Radio upper limit from GMRT
  83. Swift/UVOT observations of GRB070805
  84. UVOT observations of SAXJ1810.8-2609
  85. Swift detection of a outburst from SAX J1810.8-2609
  86. VLA non-detection of GRB 070721B
  87. GRB 070802: REM optical observations
  88. GRB 070802: Swift-XRT refined analysis
  89. GRB070802: Swift/UVOT upper limits
  90. GRB 070802: V-band detection of the candidate afterglow
  91. GRB 070802: GROND J band candidate
  92. Swift/UVOT detection of GRB070714B
  93. AGILE-ACS position for the SGR 1806-20 July 27 burst
  94. VLA upper limit on short hard burst GRB 070714B
  95. GRB070729: Swift/UVOT upper limits
  96. GRB 070729: Swift-XRT refined analysis
  97. GRB 070724B: P60 Observations
  98. GRB 070724B: Swift/UVOT Upper limits
  99. GRB 070721A: optical observations
  100. GRB 070724A: further VLT observations

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