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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"

41912 results found.

  1. SGR1900+14 field optical observations
  2. GRB 980613 Near-IR observations
  3. GRB980613, optical observations
  4. GRB 980613: Optical transient and its host galaxy
  5. SGR1627-41, RXTE/ASM observations
  6. SGR1627-41, Refined IPN annulus location
  7. GRB 980613: Detection of the probable host galaxy
  8. Reduced error box of SGR 1627-41
  9. GRB 980613: BATSE Observations
  10. SGR1627-41, BeppoSAX-GRBM detections
  11. GRB 980613 Optical Observations
  12. GRB 980613 optical observations
  13. Discovery of a new SGR source, SGR1627-41
  14. GRB980613 Optical Observations
  15. GRB980613 observations from Palomar
  16. GRB980613 BeppoSAX-NFI follow up
  17. GRB 980613 new optical/IR observations
  18. GRB 980613 optical/IR obs.
  19. GRB980613 Near Infra-Red Observations
  20. GRB971214 Secondary Standards
  21. SGR 1900+14
  22. GRB980519 Secondary Standards
  23. SGR1900+14
  24. SGR1900+14
  25. BATSE on-board GRB trigger change
  26. GRB 980519 Optical Observations
  27. GRB980519 optical observations
  28. GRB980519 I-band observations
  29. GRB 980519
  30. GRB980519 optical observations
  31. GRB 980519 Optical Observations
  32. GRB980519 BATSE Observations
  33. GRB970519, optical follow-up at Schmidt Calern
  34. GRB980519 optical observations
  35. GRB980519 Optical Observations
  36. GRB980519 Optical Observations
  37. GRB980519 IPN POSITION
  38. GRB980519 Optical Observations
  39. GRB 980519 Optical Observations
  40. GRB980519 optical observations
  41. GRB980515, BeppoSAX IAUC to be submitted
  42. BATSE on-board GRB trigger change
  43. GRB980519, BeppoSAX-WFC updated position
  44. GRB980515: SAX-WFC updated position
  45. GRB 980425 Radio Light Curve
  46. GRB 980425 Brightness Temperature
  47. BSAX Observations of GRB980425 field
  48. IPN web site of GRBs
  49. GRB980425 BATSE observations
  50. SAX J0840.7+2248 Optical Observations
  51. GRB 980425 optical observations
  52. GRB980425: optical obs.
  53. GRB980425: Radio Observations
  54. GRB 980425 optical observations
  55. report on BSAX observations of GRB980425
  56. GRB 980425 optical observations
  57. GRB 980329 ROSAT observation
  58. GRB980326 X-ray Observations
  59. GRB980326, optical observations
  60. GRB980326, optical observations
  61. GRB980329, Fading IR counterpart to radio source
  62. GRByymmdd, Announcement of automation
  63. GRB980326 IPN annulus
  64. GRB980329
  65. GRB980329 Keck K-band observations
  66. GRB980329 sub-millimeter observations
  67. GRB980329 IPN annulus
  68. GRB980329 optical observations
  69. GRB980329 near-IR observations
  70. GRB980329 infrared observations
  71. GRB980329 optical observations
  72. GRB980326 optical observations
  73. GRB980329 optical observations
  74. GRB980329 VLA observations
  75. GRB980329 near IR observations
  76. GRB980329 optical observations
  77. GRB980329 optical observations
  78. GRB980326 optical observations
  79. GRB980326 optical observations
  80. GRB980326 optical observations
  81. GRB980326 optical observations
  82. GRB970508 SAO RAS optical observations
  83. Optical Observations of GRB 970508
  84. GRB 971214: Redshift from Keck Observations
  85. Near-IR follow-up on GRB 971227
  86. GRB971214: Keck R & I-band Observations
  87. GRB 971227: Optical Observations
  88. Optical Observations of the GRB 971227 field
  89. Optical Observations on GRB 971227
  90. GRB971227: Plaskett R-band observations
  91. GRB 971227: Optical clarifications
  92. Optical Observations for GRB 971227
  93. GRB971227: Further CAHA R-band images
  94. GRB971227: LOTIS observations
  95. GRB 971227: CAHA R-band images
  96. GRB 971227: Optical observations
  97. GRB971214: Optical Observations and Calibrations
  98. Sub-millimeter Observations of GRB 971214 at the JCMT
  99. GRB 971214: Apache Point Observatory Optical Observations
  100. GRB 971214: KPNO Optical Observations

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