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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"

36311 results found.

  1. RXTE Observation of GRB 980706
  2. GRB980703: Spectrum of the proposed optical counterpart
  3. GRB980703 Transient Optical Follow-Up
  4. GRB980703: LOTIS observation at early times
  5. GRB980613 Optical Observations
  6. GRB 980703
  7. GRB 980703 H-band Observations
  8. GRB980703 (optical R observations)
  9. GRB980706
  10. GRB980703: radio source/optical transient
  11. BeppoSAX NFI observations of GRB 980703
  12. GRB 980703: ASM Position & Intensity
  13. GRB980703
  14. GRB980703 optical followup
  15. GRB 980613 Near-IR observations
  16. GRB980613, optical observations
  17. GRB 980613: Optical transient and its host galaxy
  18. GRB 980613: Detection of the probable host galaxy
  19. GRB 980613: BATSE Observations
  20. GRB 980613 Optical Observations
  21. GRB 980613 optical observations
  22. GRB980613 Optical Observations
  23. GRB980613 observations from Palomar
  24. GRB980613 BeppoSAX-NFI follow up
  25. GRB 980613 new optical/IR observations
  26. GRB 980613 optical/IR obs.
  27. GRB980613 Near Infra-Red Observations
  28. GRB980611
  29. GRB980613, BeppoSAX WFC positions
  30. GRB971214 Secondary Standards
  31. GRB980519 Secondary Standards
  32. BATSE on-board GRB trigger change
  33. GRB 980519 Optical Observations
  34. GRB980519 optical observations
  35. GRB 980519
  36. GRB980519 optical observations
  37. GRB 980519 Optical Observations
  38. GRB980519 BATSE Observations
  39. GRB970519, optical follow-up at Schmidt Calern
  40. GRB980519 optical observations
  41. GRB980519 Optical Observations
  42. GRB980519 Optical Observations
  43. GRB980519 IPN POSITION
  44. GRB980519 Optical Observations
  45. GRB 980519 Optical Observations
  46. GRB980519 optical observations
  47. GRB980515, BeppoSAX IAUC to be submitted
  48. BATSE on-board GRB trigger change
  49. BeppoSAX GRB ALERT: updated position of grb980515
  50. GRB 980425 Radio Light Curve
  51. GRB 980425 Brightness Temperature
  52. IPN web site of GRBs
  53. GRB980425 BATSE observations
  54. SAX J0840.7+2248 Optical Observations
  55. GRB 980425 optical observations
  56. GRB980425: optical obs.
  57. GRB980425: Radio Observations
  58. GRB 980425 optical observations
  59. GRB 980425 optical observations
  60. GRB 980329 ROSAT observation
  61. GRB980326 X-ray Observations
  62. GRB980326, optical observations
  63. GRB980326, optical observations
  64. GRB980329, Fading IR counterpart to radio source
  65. GRByymmdd, Announcement of automation
  66. GRB980326 IPN annulus
  67. GRB980329 sub-millimeter observations
  68. GRB980329 IPN annulus
  69. GRB980329 near-IR observations
  70. GRB980326 optical observations
  71. GRB980329 optical observations
  72. GRB980329 VLA observations
  73. GRB980329 near IR observations
  74. GRB980329 optical observations
  75. GRB980329 optical observations
  76. GRB980326 optical observations
  77. GRB980326 optical observations
  78. GRB970508 SAO RAS optical observations
  79. Optical Observations of GRB 970508
  80. GRB 971214: Redshift from Keck Observations
  81. Near-IR follow-up on GRB 971227
  82. GRB971214: Keck R & I-band Observations
  83. GRB 971227: Optical Observations
  84. Optical Observations of the GRB 971227 field
  85. Optical Observations on GRB 971227
  86. GRB971227: Plaskett R-band observations
  87. GRB 971227: Optical clarifications
  88. Optical Observations for GRB 971227
  89. GRB971227: Further CAHA R-band images
  90. GRB971227: LOTIS observations
  91. GRB 971227: CAHA R-band images
  92. GRB 971227: Optical observations
  93. Sub-millimeter Observations of GRB 971214 at the JCMT
  94. GRB 971214: EUVE Observations
  95. GRB 971214: Redshift from Keck Optical Observations
  96. GRB 971214: Redshift from Keck Optical Observations
  97. GRB 971214: Apache Point Observatory Optical Observations
  98. GRB 971214: KPNO Optical Observations
  99. Optical Observations of GRB 971214 at Keck
  100. GRB 971214: Optical Observations

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