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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"

28228 results found.

  1. GRB990123, Optical BVRI Observations
  2. GRB 990123: near-infrared observations.
  3. GRB990123, OSSE observations
  4. GRB990123: NIR Observation
  5. GRB990123, ASCA X-ray observation of afterglow
  6. "GRB 990123: New BV Observations"
  7. GRB 990123 Optical Follow-Up
  8. GRB 990123: BATSE Observations
  9. GRB990123 Optical Observations
  10. GRB 990123: New Optical Observations, Decay Measure
  11. GRB 990123 Optical Follow-Up
  12. GRB 990123: Possible Gravitationally Lensed Burst?
  13. GRB990123, optical observation
  14. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  15. GRB990123, Optical observation
  16. GRB 990123: Optical Decay Slope
  17. GRB 990123 r-band photometry
  18. GRB 990123 Optical Follow-up
  19. GRB990123, early optical counterpart detection
  20. GRB990123 Optical Observation
  21. Possible identification of SN1999E with GRB980910
  22. Optical Observations of GRB 981220
  23. GRB 981226: radio variable
  24. GRB981220
  25. GRB981220, Correction to GCN 179
  26. GRB 981220 Optical observations
  27. GRB 981226 Optical Observations
  28. GRB 981220 and GRB 981226, optical observations
  29. GRB981226 Optical Observations
  30. GRB981226 BeppoSAX follow up
  31. GRB 981226
  32. GRB 981226 optical observations
  33. GRB981220 B, R and I band observations
  34. Optical Observations of GRB981226
  35. GRB 981220:Optical Observations
  36. GRB 981226 optical observations
  37. GRB 981220
  38. GRB 981220, radio observations
  39. GRB981220 I-band Observations
  40. GRB 981220
  41. GRB 980326/Host Galaxy
  42. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  43. BeppoSAX NFI Observation of GRB980425
  44. GRB980329 R,I flux calibration and R,I,K upper limits
  45. GRB980425 Optical Follow-up
  46. GRB 980923 BATSE Observations
  47. SGR1900+14, BeppoSAX-GRBM observations
  48. GRB970508 optical observations
  49. GRB971214, association with a Galactic star?
  50. GRB980519, Optical Observations
  51. GRB980703 - BeppoSAX/GRBM detection
  52. GRB980703 optical photometry
  53. GRB 980703: BATSE Observations
  54. GRB980703 optical observations
  55. GRB980703: Radio transient
  56. GRB 980703: Spectrum of the proposed optical counterpart
  57. GRB980703 Transient Optical Follow-Up
  58. GRB980703: LOTIS observation at early times
  59. GRB980613 Optical Observations
  60. GRB980703 (I band observations)
  61. BeppoSAX NFI observations of GRB 980703
  62. GRB980519 observation report
  63. GRB980703 optical followup
  64. Radio observations of SGRs
  65. SGR1900+14 field optical observations
  66. GRB980613, optical observations
  67. GRB 980613: Optical transient and its host galaxy
  68. SGR1627-41, RXTE/ASM observations
  69. GRB 980613: Detection of the probable host galaxy
  70. Reduced error box of SGR 1627-41
  71. GRB 980613: BATSE Observations
  72. GRB 980613 Optical Observations
  73. GRB 980613 optical observations
  74. Discovery of a new SGR source, SGR1627-41
  75. GRB980613 Optical Observations
  76. GRB980613 observations from Palomar
  77. GRB 980613 optical/IR obs.
  78. GRB980613 Near Infra-Red Observations
  79. GRB971214 Secondary Standards
  80. GRB980519 Secondary Standards
  81. BATSE on-board GRB trigger change
  82. GRB 980519 Optical Observations
  83. GRB 980519
  84. GRB980519 optical observations
  85. GRB 980519 Optical Observations
  86. GRB980519 BATSE Observations
  87. GRB980519 Optical Observations
  88. GRB980519 Optical Observations
  89. GRB 980519 Optical Observations
  90. GRB980515, BeppoSAX IAUC to be submitted
  91. BSAX Observations of GRB980425 field
  92. IPN web site of GRBs
  93. GRB980425 BATSE observations
  94. SAX J0840.7+2248 Optical Observations
  95. GRB980425: optical obs.
  96. GRB980425: Radio Observations
  97. report on BSAX observations of GRB980425
  98. GRB 980329 ROSAT observation
  99. GRB980326 X-ray Observations
  100. GRB980326, optical observations

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