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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"

21093 results found.

  1. GRB 100522A: NIR observations from CAHA
  2. GRB 100418A: CrAO optical observations
  3. GRB 100518A: GROND afterglow observation and photo-z
  4. GRB 100518A: Swift/UVOT Upper Limits
  5. GRB 100518A: BOOTES-3 optical observations
  6. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  7. GRB 100517A: MASTER-Net wide field camera prompt optical observations
  8. GRB 100514A: Swift/UVOT Observations
  9. GRB 100514A: YNAO-GMG observations
  10. GRB 100514A: MASTER-Net optical observations
  11. GRB 100514A: Faulkes Telescope South observations
  12. GRB 100513A: Faulkes Telescope South observations
  13. GRB 100513A: Swift/UVOT upper limits
  14. GRB 100513A: Gemini/GMOS Spectroscopic Redshift
  15. GRB 100513A: Lick observations and R-band dropout
  16. GRB 100513A: PAIRITEL continued observations and confirmation of fading
  17. GRB 100513A: PAIRITEL NIR afterglow candidate
  18. GRB 100511A: Super-LOTIS early observations
  19. GRB100508A: Further Swift/UVOT Observations
  20. GRB 100508A: GROND Detection of the optical afterglow
  21. GRB100508A: Swift/UVOT Detection of the Afterglow
  22. GRB 100418A: Keck imaging
  23. GRB 100418A: RTT150 optical observations
  24. GRB 100504A: Swift/UVOT Observations
  25. GRB 100418A: Flattening of the Swift/UVOT Optical Light Curve
  26. GRB 100504A: GROND Upper limits
  27. INTEGRAL observations of Swift GRB trigger 421072
  28. GRB 100420A: EVLA radio observations
  29. GRB 100420A: Gemini discovery of infrared afterglow
  30. GRB 100423A: xinglong TNT optical upper limit
  31. GRB 100427A: Swift XRT and UVOT Upper Limits
  32. GRB 100424a. Radio observations
  33. GRB 100418A: RTT150 optical observations
  34. GRB 100414A : EVLA Radio Detection
  35. GRB 100414A : WSRT Radio Detection
  36. GRB 100423A: CrAO optical observations
  37. GRB 100418A: Terskol optical observations
  38. GRB 100424A: CrAO optical observations
  39. GRB 100424A: NIR Afterglow Confirmation
  40. GRB 100424A: Gemini/NIRI H-band observations
  41. GRB100425A: Swift/UVOT Upper Limits
  42. GRB 100424A: Swift/UVOT Upper Limits
  43. GRB 100425A: GROND afterglow observation
  44. GRB 100424A: Gemini/NIRI Candidate Afterglow
  45. GRB 100425A: candidate optical afterglow from the VLT
  46. GRB 100424A : Lulin early z'-band upper limit
  47. GRB 100424A: GROND Upper Limits
  48. GRB 100424A: PAIRITEL NIR Upper Limits
  49. GRB 100424A: WHT z-band observations
  50. GRB 100424A: NOT optical observations
  51. GRB 100418A: ROVOR optical measurements at 35 hours
  52. GRB 100418A: Possible Evidence for a Supernova
  53. Swift Trigger 420256: IAC80 R-band observations
  54. Swift Trigger 420256: BOOTES-2 observations
  55. GRB 100423A: GROND discovery of afterglow
  56. Radio afterglow detection of GRB 100418A with the EVLA
  57. GRB 100414A: Radio Afterglow Detection with the Expanded VLA
  58. GRB 100418A: Continued PAIRITEL NIR Observations
  59. GRB 100418A: WSRT Radio Detection
  60. GRB 100418A: Continuing Swift/UVOT Observations
  61. GRB 100418A: further GROND observations and light curve fit
  62. GRB 100418A: RTT150 optical observations
  63. GRB 100414A: CFHT optical observations
  64. GRB 100420A: Swift/UVOT Upper Limits
  65. GRB 100418A: SARA second epoch
  66. GRB 100420A: SARA Upper Limits
  67. GRB 100418A: RTT150 observations during the optical afterglow maximum
  68. GRB 100418A: optical observations
  69. GRB 100418A: MASTER-Net optical observations
  70. GRB 100418A: VLT optical observations
  71. GRB 100418A: SMA submm detection
  72. GRB 100418A PAIRITEL NIR Observations
  73. GRB 100418A: ROVOR optical afterglow detection
  74. GRB 100418A: Swift/UVOT Observations
  75. GRB 100418A: SARA observations
  76. GRB100414A: SAO RAS optical observations
  77. GRB 100418A: GROND observations; missing author list added
  78. GRB 100418A: GROND observations
  79. GRB 100418A: ROTSE-III Optical Limits
  80. GRB 100413A: Radio Afterglow Detection with the EVLA
  81. GRB 100414A: Swift/UVOT Observations
  82. GRB 100414A: GROND Detection of the Optical Afterglow
  83. GRB 100414A: Gemini-N candidate and redshift
  84. GRB 100414A: Palomar Transient Factory Observations
  85. GRB 100413B: Swift Confirmation of Burst
  86. GRB 100415A: MAXI/GSC detection of a probable GRB
  87. GRB 100413B : Swift detection of a burst
  88. GRB 100413A: GROND Upper limits
  89. GRB 100413A: Swift/UVOT Upper Limits
  90. GRB 100413A: Faulkes Telescope South observations
  91. GRB 100413A: SARA upper limit
  92. GRB 100413: xinglong TNT optical upper limit
  93. GRB 100413A: MASTER-Net optical observations
  94. GRB100401A: GROND Upper Limits
  95. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  96. MASTER observations on the Swift second trigger on LS V +44 17
  97. GRB 100331B: GROND Upper limits
  98. Master-Net observations on the Swift trigger on LS V +44 17
  99. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  100. GRB 100331B: BOOTES-3 observations

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