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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"

36314 results found.

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

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