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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"

42809 results found.

  1. Discovery of a new SGR source, SGR1627-41
  2. GRB980613 Optical Observations
  3. GRB980613 observations from Palomar
  4. GRB980613 BeppoSAX-NFI follow up
  5. GRB 980613 new optical/IR observations
  6. GRB 980613 optical/IR obs.
  7. GRB980613 Near Infra-Red Observations
  8. GRB980611
  9. GRB980613, BeppoSAX WFC positions
  10. GRB971214 Secondary Standards
  11. SGR 1900+14
  12. GRB980519 Secondary Standards
  13. SGR1900+14
  14. SGR1900+14
  15. BATSE on-board GRB trigger change
  16. GRB 980519 Optical Observations
  17. GRB980519 optical observations
  18. GRB980519 I-band observations
  19. GRB 980519
  20. GRB980519 optical observations
  21. GRB 980519 Optical Observations
  22. GRB980519 BATSE Observations
  23. GRB970519, optical follow-up at Schmidt Calern
  24. GRB980519 optical observations
  25. GRB980519 Optical Observations
  26. GRB980519 Optical Observations
  27. GRB980519 IPN POSITION
  28. GRB980519 Optical Observations
  29. GRB 980519 Optical Observations
  30. GRB980519 optical observations
  31. GRB980515, BeppoSAX IAUC to be submitted
  32. BATSE on-board GRB trigger change
  33. GRB980519, BeppoSAX-WFC position
  34. BeppoSAX GRB ALERT: updated position of grb980515
  35. GRB 980425 Radio Light Curve
  36. GRB 980425 Brightness Temperature
  37. BSAX Observations of GRB980425 field
  38. IPN web site of GRBs
  39. GRB980425 BATSE observations
  40. SAX J0840.7+2248 Optical Observations
  41. GRB 980425 optical observations
  42. GRB980425: optical obs.
  43. GRB980425: Radio Observations
  44. GRB 980425 optical observations
  45. report on BSAX observations of GRB980425
  46. GRB 980425 optical observations
  47. GRB 980329 ROSAT observation
  48. GRB980326 X-ray Observations
  49. GRB980326, optical observations
  50. GRB980326, optical observations
  51. GRByymmdd, Announcement of automation
  52. GRB980326 IPN annulus
  53. GRB980329
  54. GRB980329 Keck K-band observations
  55. GRB980329 sub-millimeter observations
  56. GRB980329 IPN annulus
  57. GRB980329 optical observations
  58. GRB980329 near-IR observations
  59. GRB980329 near-IR observations
  60. GRB980329 optical observations
  61. GRB980329 infrared observations
  62. GRB980329 optical observations
  63. GRB980326 optical observations
  64. GRB980329 optical observations
  65. GRB980329 VLA observations
  66. GRB980329 near IR observations
  67. GRB980329 optical observations
  68. GRB980329 optical observations
  69. GRB980329 optical observations
  70. GRB980326 optical observations
  71. GRB980326 optical observations
  72. GRB980326 optical observations
  73. GRB980326 optical observations
  74. GRB970508 SAO RAS optical observations
  75. Optical Observations of GRB 970508
  76. GRB 971214: Redshift from Keck Observations
  77. Near-IR follow-up on GRB 971227
  78. GRB971214: Keck R & I-band Observations
  79. GRB 971227: Optical Observations
  80. Optical Observations of the GRB 971227 field
  81. Optical Observations on GRB 971227
  82. GRB971227: Plaskett R-band observations
  83. GRB 971227: Optical clarifications
  84. Optical Observations for GRB 971227
  85. GRB971227: Further CAHA R-band images
  86. GRB971227: LOTIS observations
  87. GRB 971227: CAHA R-band images
  88. GRB 971227: Optical observations
  89. GRB971214: Optical Observations and Calibrations
  90. Sub-millimeter Observations of GRB 971214 at the JCMT
  91. GRB 971214: EUVE Observations
  92. GRB 971214: Redshift from Keck Optical Observations
  93. GRB 971214: Redshift from Keck Optical Observations
  94. GRB 971214: Apache Point Observatory Optical Observations
  95. GRB 971214: KPNO Optical Observations
  96. Optical Observations of GRB 971214 at Keck
  97. GRB 971214: Optical Observations
  98. Radio Observations of GRB 971214 at the VLA
  99. GRB 971214: USNOFS Observations Summary
  100. GRB 971024: KPNO Optical Observations Summary

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