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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"

22198 results found.

  1. SGR1627-41, RXTE/ASM observations
  2. GRB 980613: Detection of the probable host galaxy
  3. Reduced error box of SGR 1627-41
  4. GRB 980613: BATSE Observations
  5. GRB 980613 Optical Observations
  6. GRB 980613 optical observations
  7. Discovery of a new SGR source, SGR1627-41
  8. GRB980613 Optical Observations
  9. GRB980613 observations from Palomar
  10. GRB 980613 new optical/IR observations
  11. GRB 980613 optical/IR obs.
  12. GRB980613 Near Infra-Red Observations
  13. GRB971214 Secondary Standards
  14. SGR 1900+14
  15. GRB980519 Secondary Standards
  16. SGR1900+14
  17. SGR1900+14
  18. GRB 980519 Optical Observations
  19. GRB980519 optical observations
  20. GRB980519 I-band observations
  21. GRB 980519
  22. GRB980519 optical observations
  23. GRB 980519 Optical Observations
  24. GRB980519 BATSE Observations
  25. GRB980519 optical observations
  26. GRB980519 Optical Observations
  27. GRB980519 Optical Observations
  28. GRB980519 Optical Observations
  29. GRB 980519 Optical Observations
  30. GRB980519 optical observations
  31. GRB 980425 Brightness Temperature
  32. BSAX Observations of GRB980425 field
  33. GRB980425 BATSE observations
  34. SAX J0840.7+2248 Optical Observations
  35. GRB 980425 optical observations
  36. GRB980425: optical obs.
  37. GRB980425: Radio Observations
  38. GRB 980425 optical observations
  39. report on BSAX observations of GRB980425
  40. GRB 980425 optical observations
  41. GRB980326 X-ray Observations
  42. GRB980326, optical observations
  43. GRB980326, optical observations
  44. GRB980329, Fading IR counterpart to radio source
  45. GRByymmdd, Announcement of automation
  46. GRB980329
  47. GRB980329 Keck K-band observations
  48. GRB980329 sub-millimeter observations
  49. GRB980329 optical observations
  50. GRB980329 near-IR observations
  51. GRB980329 near-IR observations
  52. GRB980329 optical observations
  53. GRB980329 infrared observations
  54. GRB980329 optical observations
  55. GRB980326 optical observations
  56. GRB980329 optical observations
  57. GRB980329 VLA observations
  58. GRB980329 near IR observations
  59. GRB980329 optical observations
  60. GRB980329 optical observations
  61. GRB980329 optical observations
  62. GRB980326 optical observations
  63. GRB980326 optical observations
  64. GRB980326 optical observations
  65. GRB980326 optical observations
  66. GRB970508 SAO RAS optical observations
  67. Optical Observations of GRB 970508
  68. GRB 971214: Redshift from Keck Observations
  69. Near-IR follow-up on GRB 971227
  70. GRB971214: Keck R & I-band Observations
  71. GRB 971227: Optical Observations
  72. Optical Observations of the GRB 971227 field
  73. Optical Observations on GRB 971227
  74. GRB971227: Plaskett R-band observations
  75. Optical Observations for GRB 971227
  76. GRB971227: Further CAHA R-band images
  77. GRB971227: LOTIS observations
  78. GRB 971227: CAHA R-band images
  79. GRB 971227: Optical observations
  80. GRB971214: Optical Observations and Calibrations
  81. Sub-millimeter Observations of GRB 971214 at the JCMT
  82. GRB 971214: EUVE Observations
  83. GRB 971214: Redshift from Keck Optical Observations
  84. GRB 971214: Redshift from Keck Optical Observations
  85. GRB 971214: Apache Point Observatory Optical Observations
  86. GRB 971214: KPNO Optical Observations
  87. Optical Observations of GRB 971214 at Keck
  88. GRB 971214: Optical Observations
  89. Radio Observations of GRB 971214 at the VLA
  90. GRB 971214: USNOFS Observations Summary
  91. GRB 971024: KPNO Optical Observations Summary
  92. GRB 971024: Refined analysis by USNOFS Observations
  93. GRB 971024: KPNO Optical Observations
  94. GRB 971024: USNO Observations
  95. Possible new SGR from US Naval Observatory
  96. RXTE Observations of SGR 1814-13
  97. GRB 970828: Palomar Observations
  98. GRB 970228: Keck/LRIS Optical Observations

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