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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"

42810 results found.

  1. GRB 980613 optical observations
  2. Discovery of a new SGR source, SGR1627-41
  3. GRB980613 Optical Observations
  4. GRB980613 observations from Palomar
  5. GRB980613 BeppoSAX-NFI follow up
  6. GRB 980613 new optical/IR observations
  7. GRB 980613 optical/IR obs.
  8. GRB980613 Near Infra-Red Observations
  9. GRB980611
  10. GRB980613, BeppoSAX WFC positions
  11. GRB971214 Secondary Standards
  12. SGR 1900+14
  13. GRB980519 Secondary Standards
  14. SGR1900+14
  15. SGR1900+14
  16. BATSE on-board GRB trigger change
  17. GRB 980519 Optical Observations
  18. GRB980519 optical observations
  19. GRB980519 I-band observations
  20. GRB 980519
  21. GRB980519 optical observations
  22. GRB 980519 Optical Observations
  23. GRB980519 BATSE Observations
  24. GRB970519, optical follow-up at Schmidt Calern
  25. GRB980519 optical observations
  26. GRB980519 Optical Observations
  27. GRB980519 Optical Observations
  28. GRB980519 IPN POSITION
  29. GRB980519 Optical Observations
  30. GRB 980519 Optical Observations
  31. GRB980519 optical observations
  32. GRB980515, BeppoSAX IAUC to be submitted
  33. BATSE on-board GRB trigger change
  34. GRB980519, BeppoSAX-WFC position
  35. BeppoSAX GRB ALERT: updated position of grb980515
  36. GRB 980425 Radio Light Curve
  37. GRB 980425 Brightness Temperature
  38. BSAX Observations of GRB980425 field
  39. IPN web site of GRBs
  40. GRB980425 BATSE observations
  41. SAX J0840.7+2248 Optical Observations
  42. GRB 980425 optical observations
  43. GRB980425: optical obs.
  44. GRB980425: Radio Observations
  45. GRB 980425 optical observations
  46. report on BSAX observations of GRB980425
  47. GRB 980425 optical observations
  48. GRB 980329 ROSAT observation
  49. GRB980326 X-ray Observations
  50. GRB980326, optical observations
  51. GRB980326, optical observations
  52. GRByymmdd, Announcement of automation
  53. GRB980326 IPN annulus
  54. GRB980329
  55. GRB980329 Keck K-band observations
  56. GRB980329 sub-millimeter observations
  57. GRB980329 IPN annulus
  58. GRB980329 optical observations
  59. GRB980329 near-IR observations
  60. GRB980329 near-IR observations
  61. GRB980329 optical observations
  62. GRB980329 infrared observations
  63. GRB980329 optical observations
  64. GRB980326 optical observations
  65. GRB980329 optical observations
  66. GRB980329 VLA observations
  67. GRB980329 near IR observations
  68. GRB980329 optical observations
  69. GRB980329 optical observations
  70. GRB980329 optical observations
  71. GRB980326 optical observations
  72. GRB980326 optical observations
  73. GRB980326 optical observations
  74. GRB980326 optical observations
  75. GRB970508 SAO RAS optical observations
  76. Optical Observations of GRB 970508
  77. GRB 971214: Redshift from Keck Observations
  78. Near-IR follow-up on GRB 971227
  79. GRB971214: Keck R & I-band Observations
  80. GRB 971227: Optical Observations
  81. Optical Observations of the GRB 971227 field
  82. Optical Observations on GRB 971227
  83. GRB971227: Plaskett R-band observations
  84. GRB 971227: Optical clarifications
  85. Optical Observations for GRB 971227
  86. GRB971227: Further CAHA R-band images
  87. GRB971227: LOTIS observations
  88. GRB 971227: CAHA R-band images
  89. GRB 971227: Optical observations
  90. GRB971214: Optical Observations and Calibrations
  91. Sub-millimeter Observations of GRB 971214 at the JCMT
  92. GRB 971214: EUVE Observations
  93. GRB 971214: Redshift from Keck Optical Observations
  94. GRB 971214: Redshift from Keck Optical Observations
  95. GRB 971214: Apache Point Observatory Optical Observations
  96. GRB 971214: KPNO Optical Observations
  97. Optical Observations of GRB 971214 at Keck
  98. GRB 971214: Optical Observations
  99. Radio Observations of GRB 971214 at the VLA
  100. GRB 971214: USNOFS Observations Summary

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