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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"

23446 results found.

  1. GRB 070810B: Keck spectroscopy of possible host galaxies
  2. GRB070810B: Swift/UVOT Upper Limits
  3. GRB 070810B: XRT refined analysis
  4. GRB 070809: Swift/UVOT Corrected Photometry
  5. GRB 070810B: Xinglong TNT optical Upper Limit
  6. GRB070810B: Optical observations with KANATA
  7. A giant outburst from Cygnus X-1 detected by Konus-Wind and Suzaku-WAM
  8. GRB 070809: Swift/UVOT Upper Limits
  9. GRB 070810B: Swift detection of a short burst
  10. VLA upper limit on the short hard burst GRB 070729
  11. No radio detection in superAGILE burst 070724B
  12. GRB 070809: Keck Imaging
  13. GRB 070810: Swift-XRT Team Refined Analysis
  14. GRB 070809: Swift-XRT refined analysis
  15. GRB 070810: enhanced Swift-XRT position
  16. GRB 070810: Swift/UVOT Optical Counterpart
  17. GRB 070810: ROTSE-III Detection of Optical Counterpart
  18. GRB 070810: Swift detection of a burst
  19. GRB 070809: Optical Pre-imaging from Palomar
  20. GRB 070808: Swift/UVOT upper limits
  21. GRB 070809: ROTSE-III Optical Limits
  22. GRB 070809: Swift detection of a short burst
  23. GRB 070808 : Faulkes Telescope South Observations
  24. GCN Swift XRT update position notices and enhanced position circulars
  25. GRB 070808: Swift XRT refined analysis
  26. GRB 070808, Swift-BAT refined analysis
  27. GRB 070808: OPTIMA-Burst optical upper limit
  28. GRB 070808: Xinglong TNT optical Upper Limit
  29. GRB070808: Optical observations with KANATA
  30. GRB070808 - SDSS Pre-Burst Observations
  31. GRB 070808: ROTSE-III Optical Limits
  32. GRB 070808: Swift detection of a burst
  33. GRB061121A: PROMPT Observations
  34. GRB070805 XRT and UVOT afterglow candidate
  35. GRB070612A: Radio upper limit from GMRT
  36. Swift/UVOT observations of GRB070805
  37. GRB 070805: Swift detection of a burst
  38. UVOT observations of SAXJ1810.8-2609
  39. Swift detection of a outburst from SAX J1810.8-2609
  40. VLA non-detection of GRB 070721B
  41. GRB 070802: REM optical observations
  42. GRB 070802: Swift-XRT refined analysis
  43. GRB070802: Swift/UVOT upper limits
  44. GRB 070802, Swift-BAT refined analysis
  45. GRB 070802: V-band detection of the candidate afterglow
  46. GRB 070802: GROND J band candidate
  47. GRB 070802: Swift detection of a burst
  48. GRB 070731, Swift-BAT refined analysis
  49. Swift/UVOT detection of GRB070714B
  50. AGILE-ACS position for the SGR 1806-20 July 27 burst
  51. GRB 070729: LCO optical imaging
  52. VLA upper limit on short hard burst GRB 070714B
  53. GRB070729: Swift/UVOT upper limits
  54. GRB 070729: Magellan NIR Observations
  55. GRB 070724B: P60 Observations
  56. GRB 070729: Swift detection of a short hard burst
  57. GRB 070724B: Swift/UVOT Upper limits
  58. GRB 070724B: Swift-XRT afterglow likely candidate
  59. GRB 070721A: optical observations
  60. GRB 070724A: further VLT observations
  61. GRB 070724B: Analysis of AGILE gamma-ray data
  62. GRB 070724b: First Gamma Ray Burst Localization by SuperAGILE onboard
  63. Four radio sources in Swift-XRT error box of GRB 070724
  64. GRB 070724: P60 and Gemini Observations
  65. GRB 060814 - Keck host detection and redshift
  66. Swift/UVOT refined analysis of GRB070724
  67. GRB 070724: Swift-XRT Team refined analysis
  68. Short-Hard GRB070714B: PROMPT Observations
  69. GRB 070721B: further observations and analysis
  70. GRB 070724: Swift detection of a burst
  71. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  72. GRB 070714B: Keck observations
  73. Swift/UVOT Observations of GRB070721A
  74. GRB 070721B : Faulkes Telescope South observations
  75. GRB 070721A : Faulkes Telescope South optical limit
  76. GRB 070721A: Swift/XRT refined analysis
  77. GRB070721B: A bright UVOT candidate
  78. GRB 070721B: Swift detection of a burst
  79. GRB 070721: Swift detection of a possible burst
  80. GRB070714B: TNG NIR observations
  81. GRB 070714A: Swift/UVOT Upper limits
  82. GRB 070714B: Swift/UVOT Upper Limits
  83. GRB 070714B: confirmation of optical afterglow
  84. GRB 070616: No Evidence for I Band Afterglow
  85. GRB 070714A: Swift XRT refined analysis
  86. GRB070714B: Swift-XRT refined analysis
  87. GRB 070707: Swift-XRT follow-up observations
  88. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  89. GRB 070714 ("Bastille"): Optical Pre-Imaging
  90. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  91. GRB 070714 : Liverpool Telescope optical counterpart ?
  92. GRB 070714: Swift detection of a bright burst, possibly short
  93. GRB 070704: RTT150 optical observations
  94. GRB 070707: optical afterglow
  95. Swift/UVOT Observations of GRB070707
  96. Swift XRT observation of GRB 070707
  97. GRB 070707: VLT observations
  98. GRB070704: FAVOR optical observations
  99. GRB 070704 : Liverpool Telescope Observations
  100. GRB 070611: VLT observations

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