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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"

20525 results found.

  1. GRB070808: Optical observations with KANATA
  2. GRB070808 - SDSS Pre-Burst Observations
  3. GRB 070808: ROTSE-III Optical Limits
  4. GRB070805 XRT and UVOT afterglow candidate
  5. GRB070612A: Radio upper limit from GMRT
  6. Swift/UVOT observations of GRB070805
  7. UVOT observations of SAXJ1810.8-2609
  8. Swift detection of a outburst from SAX J1810.8-2609
  9. VLA non-detection of GRB 070721B
  10. GRB 070802: REM optical observations
  11. GRB 070802: Swift-XRT refined analysis
  12. GRB070802: Swift/UVOT upper limits
  13. GRB 070802: V-band detection of the candidate afterglow
  14. GRB 070802: GROND J band candidate
  15. Swift/UVOT detection of GRB070714B
  16. AGILE-ACS position for the SGR 1806-20 July 27 burst
  17. VLA upper limit on short hard burst GRB 070714B
  18. GRB070729: Swift/UVOT upper limits
  19. GRB 070729: Swift-XRT refined analysis
  20. GRB 070724B: P60 Observations
  21. GRB 070724B: Swift/UVOT Upper limits
  22. GRB 070721A: optical observations
  23. GRB 070724A: further VLT observations
  24. Four radio sources in Swift-XRT error box of GRB 070724
  25. GRB 070724: P60 and Gemini Observations
  26. GRB 060814 - Keck host detection and redshift
  27. Swift/UVOT refined analysis of GRB070724
  28. GRB 070724: Swift-XRT Team refined analysis
  29. GRB 070721B: further observations and analysis
  30. GRB 070724: Swift detection of a burst
  31. GRB 070714B: Keck observations
  32. Swift/UVOT Observations of GRB070721A
  33. GRB 070721B : Faulkes Telescope South observations
  34. GRB 070721A : Faulkes Telescope South optical limit
  35. GRB 070721A: Swift/XRT refined analysis
  36. GRB 070721A, Swift-BAT refined analysis
  37. GRB070721B: A bright UVOT candidate
  38. GRB070714B: TNG NIR observations
  39. GRB 070714A: Swift/UVOT Upper limits
  40. GRB 070714B: Swift/UVOT Upper Limits
  41. GRB 070714B: Swift-BAT spectral lag for the SHB
  42. GRB 070714B: confirmation of optical afterglow
  43. GRB 070616: No Evidence for I Band Afterglow
  44. GRB 070714A: Swift XRT refined analysis
  45. GRB070714B: Swift-XRT refined analysis
  46. GRB 070714 : Liverpool Telescope optical counterpart ?
  47. GRB 070714: Swift detection of a bright burst, possibly short
  48. GRB 070704: RTT150 optical observations
  49. GRB 070707: optical afterglow
  50. Swift/UVOT Observations of GRB070707
  51. Swift XRT observation of GRB 070707
  52. GRB 070707: VLT observations
  53. GRB 070707: A long GRB detected by INTEGRAL
  54. GRB 070707: A long GRB detected by INTEGRAL
  55. GRB 070429B: NIR Observations
  56. GRB070704: FAVOR optical observations
  57. GRB 070704 : Liverpool Telescope Observations
  58. GRB 070611: VLT observations
  59. VLA detection of GRB 070612A in C Band
  60. Konus-Wind observation of GRB 070626
  61. GRB 070704: Swift-XRT refined analysis
  62. Swift/UVOT Observations of GRB070704
  63. GRB 070704: Correction to GCN Circ 6594
  64. GRB 070704: Swift detection of a burst
  65. GRB 070626: Suzaku/WAM observation of the prompt emission
  66. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  67. GRB 070628 Swift-UVOT Refined Analysis
  68. GRB 070628: NIR detection of afterglow
  69. GRB 070628: TAROT La Silla observatory optical observations
  70. INTEGRAL burst GRB070615: X-ray continued observations
  71. GRB 070616 : WIDGET simultaneous optical observations
  72. GRB070621: RTT150 optical observations
  73. GRB 070621: VLT optical observations
  74. GRB 070621: Swift/UVOT Upper Limits
  75. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  76. WHT observations of GRB070621
  77. GRB 070621: Gemini South optical imaging
  78. GRB 070621: UVOT-enhanced XRT position
  79. Observations of GRB070612A at Calar Alto
  80. GRB 070621: NOT observations
  81. GRB070621: OPTIMA-Burst optical upper limit
  82. GRB 070621: TAROT Calern observatory optical observations
  83. GRB 070621: Watcher Observations
  84. GRB 070621: Swift detection of a burst
  85. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  86. Swift/UVOT detection of GRB070616 optical afterglow.
  87. GRB070616: Optical Observation by MITSuME Okayama
  88. GRB 070616: TLS observation
  89. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  90. GRB 070616: Swift detection of a burst
  91. GRB 070612B: optical observations
  92. UVOT Observations of INTEGRAL burst GRB070615
  93. VLA upper limit on GRB 070610
  94. GRB 070615
  95. SWIFT J195509.6+261406 (GRB 070610): further observations
  96. GRB 070612A: Super-LOTIS observations
  97. GRB 070612A: Rapid Decay
  98. GRB 070612A: Suzaku/WAM observation of the prompt emission
  99. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  100. GRB070612A: MITSuME Okayama Observation

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