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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"

20514 results found.

  1. GRB990123, Optical BVRI Observations
  2. GRB 990123: near-infrared observations.
  3. GRB990123, OSSE observations
  4. GRB990123: NIR Observation
  5. "GRB 990123: New BV Observations"
  6. GRB 990123: BATSE Observations
  7. GRB 990123: New Optical Observations, Decay Measure
  8. GRB 990123 Optical Follow-Up
  9. GRB 990123: Possible Gravitationally Lensed Burst?
  10. GRB990123, optical observation
  11. GRB 990123 optical observations
  12. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  13. GRB990123 optical observations
  14. GRB 990123 r-band photometry
  15. GRB 990123 Optical Follow-up
  16. GRB990123 Optical Observation
  17. Possible identification of SN1999E with GRB980910
  18. Optical Observations of GRB 981220
  19. GRB 981226: radio variable
  20. GRB 981226 Optical Observations
  21. GRB981226 Optical Observations
  22. GRB981226 BeppoSAX follow up
  23. GRB 981226 radio observations
  24. GRB 981226
  25. GRB 981226 optical observations
  26. radio observations of GRB 981226
  27. GRB981220 B, R and I band observations
  28. GRB 981220:Optical Observations
  29. GRB 981226 optical observations
  30. GRB 981220, radio observations
  31. GRB 981220, radio observations
  32. GRB 981220
  33. GRB 980326/Host Galaxy
  34. GRB981220 IPN error box
  35. BeppoSAX NFI Observation of GRB980425
  36. GRB980329 R,I flux calibration and R,I,K upper limits
  37. GRB980425 Optical Follow-up
  38. GRB 980923 BATSE Observations
  39. GRB980703 Very Long Baseline Interferometry
  40. GRB970508 optical observations
  41. GRB971214, association with a Galactic star?
  42. GRB980519, Optical Observations
  43. GRB980703, Host galaxy multicolor photometry
  44. GRB980703 - BeppoSAX/GRBM detection
  45. GRB 980703 (NFI observations)
  46. GRB980703 optical photometry
  47. GRB980703 optical observations
  48. GRB980703 Transient Optical Follow-Up
  49. GRB980703: LOTIS observation at early times
  50. GRB980613 Optical Observations
  51. GRB980703 (optical R observations)
  52. BeppoSAX NFI observations of GRB 980703
  53. GRB 980703: ASM Position & Intensity
  54. GRB980703 optical followup
  55. Radio observations of SGRs
  56. SGR1900+14 field optical observations
  57. GRB 980613: Optical transient and its host galaxy
  58. SGR1627-41, RXTE/ASM observations
  59. GRB 980613: Detection of the probable host galaxy
  60. GRB 980613 Optical Observations
  61. GRB 980613 optical observations
  62. Discovery of a new SGR source, SGR1627-41
  63. GRB980613 Optical Observations
  64. GRB980613 observations from Palomar
  65. GRB 980613 optical/IR obs.
  66. GRB980613 Near Infra-Red Observations
  67. GRB980613, BeppoSAX WFC positions
  68. GRB971214 Secondary Standards
  69. GRB980519 Secondary Standards
  70. SGR1900+14
  71. SGR1900+14
  72. BATSE on-board GRB trigger change
  73. GRB 980519 Optical Observations
  74. GRB 980519
  75. GRB980519 optical observations
  76. GRB 980519 Optical Observations
  77. GRB970519, optical follow-up at Schmidt Calern
  78. GRB980519 Optical Observations
  79. GRB 980519 Optical Observations
  80. GRB980519 optical observations
  81. GRB980515, BeppoSAX IAUC to be submitted
  82. BATSE on-board GRB trigger change
  83. GRB980515: SAX-WFC updated position
  84. BSAX Observations of GRB980425 field
  85. IPN web site of GRBs
  86. SAX J0840.7+2248 Optical Observations
  87. GRB980425: optical obs.
  88. GRB980425: Radio Observations
  89. report on BSAX observations of GRB980425
  90. GRB980326 X-ray Observations
  91. GRB980326, optical observations
  92. GRB980326, optical observations
  93. GRB980329 Keck K-band observations
  94. GRB980329 sub-millimeter observations
  95. GRB980326 optical observations
  96. GRB980329 optical observations
  97. GRB980329 VLA observations
  98. GRB980329 optical observations
  99. GRB980326 optical observations
  100. GRB970508 SAO RAS optical observations

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