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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"

36312 results found.

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

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