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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"

19228 results found.

  1. GRB 990510: Broad Band Break
  2. GRB 990510: BATSE Observations
  3. GRB 990510: BeppoSAX/GRBM observations
  4. GRB990510 optical observations
  5. GRB 990510 optical observations
  6. GRB 990506: BATSE Observations
  7. GRB 990506, Optical Observations
  8. GRB 990506 optical observations
  9. GRB990506 observation plan
  10. GRB 990506: Limits on the possible optical transient
  11. GRB 990506, armchair astronomy
  12. GRB 990506, optical observations from +1 to +3 hours
  13. IPN localization for GRB990506
  14. GRB990323 PRECISE IPN POSITION
  15. GRB 990316 optical observations
  16. GRB990316: simultaneous optical observation
  17. GRB990316 - Optical null results
  18. GRB990308 not a new SGR
  19. GRB 990308a and GRB 990308b
  20. GRB990308, Possible new SGR~0209+70
  21. GRB 990123, Field Photometry
  22. GRB 990217, radio observations
  23. GRB990217: BeppoSAX/GRBM data
  24. GRB990123 observations
  25. GRB990217 Optical observation
  26. GRB 990123: Discovery of the Probable Host Galaxy
  27. GRB 990123: Reduced HST Images
  28. GRB 990123: BVRI standards in the field
  29. GRB990123, Probability of gravitational lensing
  30. GRB990123, Preliminary Lens Search Results
  31. On the Lensing Interpretation of GRB 990123
  32. Search for Potential Images of GRB 990123
  33. Search for Potential Images of GRB 990123
  34. GRB990123, Optical BVRI Observations
  35. GRB990123, OSSE observations
  36. GRB990123, ASCA X-ray observation of afterglow
  37. GRB 990123 Optical Follow-Up
  38. GRB 990123: BATSE Observations
  39. GRB990123 Optical Observations
  40. GRB 990123 Optical Follow-Up
  41. GRB990123, Optical observation
  42. GRB 990123: Optical Decay Slope
  43. GRB990123, early optical counterpart detection
  44. GRB990123 Optical Observation
  45. Possible identification of SN1999E with GRB980910
  46. GRB 981226: radio variable
  47. GRB981220
  48. GRB981220, Correction to GCN 179
  49. GRB 981220 Optical observations
  50. GRB 981220 and GRB 981226, optical observations
  51. GRB981226 Optical Observations
  52. GRB981226 BeppoSAX follow up
  53. GRB 981226 optical observations
  54. GRB981220 B, R and I band observations
  55. Optical Observations of GRB981226
  56. GRB 981226 optical observations
  57. GRB 981220
  58. GRB 981220, radio observations
  59. GRB 981220, radio observations
  60. GRB981220 I-band Observations
  61. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  62. GRB980329 R,I flux calibration and R,I,K upper limits
  63. GRB 980923 BATSE Observations
  64. SGR1900+14, BeppoSAX-GRBM observations
  65. GRB971214, association with a Galactic star?
  66. GRB980703 - BeppoSAX/GRBM detection
  67. GRB980703 optical photometry
  68. GRB 980703: BATSE Observations
  69. GRB980703 optical observations
  70. GRB980703: Radio transient
  71. GRB 980703: Spectrum of the proposed optical counterpart
  72. GRB980613 Optical Observations
  73. GRB 980703
  74. GRB980703 (I band observations)
  75. GRB980703 (optical R observations)
  76. BeppoSAX NFI observations of GRB 980703
  77. GRB 980703: ASM Position & Intensity
  78. GRB980519 observation report
  79. GRB980703 optical followup
  80. SGR1627-41
  81. Radio observations of SGRs
  82. SGR1900+14 field optical observations
  83. GRB980613, optical observations
  84. GRB 980613: Optical transient and its host galaxy
  85. SGR1627-41, RXTE/ASM observations
  86. GRB 980613: Detection of the probable host galaxy
  87. Reduced error box of SGR 1627-41
  88. GRB 980613: BATSE Observations
  89. GRB 980613 optical observations
  90. Discovery of a new SGR source, SGR1627-41
  91. GRB 980613 optical/IR obs.
  92. GRB980613 Near Infra-Red Observations
  93. GRB971214 Secondary Standards
  94. BATSE on-board GRB trigger change
  95. GRB 980519 Optical Observations
  96. GRB980519 BATSE Observations
  97. GRB980519 Optical Observations
  98. GRB980515, BeppoSAX IAUC to be submitted
  99. GRB 980425 Radio Light Curve
  100. BSAX Observations of GRB980425 field

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