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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

32051 results found.

  1. GRB981226, sub-millimeter observations
  2. GRB981220, sub-millimeter observations
  3. GRB 981220 and GRB 981226, optical observations
  4. GRB 981226 radio observations
  5. GRB 981226
  6. GRB 981226 optical observations
  7. radio observations of GRB 981226
  8. GRB981220 B, R and I band observations
  9. GRB 981220:Optical Observations
  10. GRB 981220 optical R and I observations
  11. GRB981226, BeppoSAX Christmas GRB
  12. GRB 981226 - Infrared Observations
  13. GRB 981226 optical observations
  14. GRB 981220
  15. GRB 981220, radio observations
  16. GRB981226 Optical Observation
  17. GRB 981220, radio observations
  18. GRB 981220: BeppoSAX/GRBM results
  19. GRB981220 I-band Observations
  20. GRB 981220
  21. GRB 981220 Optical Observations
  22. GRB 981220, optical observations
  23. GRB 980326/Host Galaxy
  24. GRB981220 IPN error box
  25. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  26. GRB980329 R,I flux calibration and R,I,K upper limits
  27. GRB980425: X-ray revised positions
  28. GRB 980923 BATSE Observations
  29. GRB980703 Very Long Baseline Interferometry
  30. GRB970508 optical observations
  31. GRB971214, association with a Galactic star?
  32. Optical Observations of the Host Galaxy of GRB 980519
  33. GRB980519, Optical Observations
  34. GRB980703, Host galaxy multicolor photometry
  35. GRB980703 - BeppoSAX/GRBM detection
  36. GRB 980703 (NFI observations)
  37. GRB980703 optical photometry
  38. GRB 980703: BATSE Observations
  39. GRB980703: Radio transient
  40. GRB980703 H-band Observations
  41. GRB 980703: Spectrum of the proposed optical counterpart
  42. RXTE Observation of GRB 980706
  43. GRB980703: Spectrum of the proposed optical counterpart
  44. GRB980703 Transient Optical Follow-Up
  45. GRB980703: LOTIS observation at early times
  46. GRB980613 Optical Observations
  47. GRB 980703
  48. GRB 980703 H-band Observations
  49. GRB980703 (optical R observations)
  50. GRB980706
  51. GRB980703: radio source/optical transient
  52. BeppoSAX NFI observations of GRB 980703
  53. GRB 980703: ASM Position & Intensity
  54. GRB980703
  55. GRB980703 optical followup
  56. GRB 980613 Near-IR observations
  57. GRB980613, optical observations
  58. GRB 980613: Optical transient and its host galaxy
  59. GRB 980613: Detection of the probable host galaxy
  60. GRB 980613: BATSE Observations
  61. GRB 980613 Optical Observations
  62. GRB 980613 optical observations
  63. GRB980613 Optical Observations
  64. GRB980613 observations from Palomar
  65. GRB980613 BeppoSAX-NFI follow up
  66. GRB 980613 new optical/IR observations
  67. GRB 980613 optical/IR obs.
  68. GRB980613 Near Infra-Red Observations
  69. GRB980611
  70. GRB980613, BeppoSAX WFC positions
  71. GRB971214 Secondary Standards
  72. GRB980519 Secondary Standards
  73. BATSE on-board GRB trigger change
  74. GRB 980519 Optical Observations
  75. GRB980519 optical observations
  76. GRB 980519
  77. GRB980519 optical observations
  78. GRB 980519 Optical Observations
  79. GRB980519 BATSE Observations
  80. GRB970519, optical follow-up at Schmidt Calern
  81. GRB980519 optical observations
  82. GRB980519 Optical Observations
  83. GRB980519 Optical Observations
  84. GRB980519 IPN POSITION
  85. GRB980519 Optical Observations
  86. GRB 980519 Optical Observations
  87. GRB980519 optical observations
  88. GRB980515, BeppoSAX IAUC to be submitted
  89. BATSE on-board GRB trigger change
  90. BeppoSAX GRB ALERT: updated position of grb980515
  91. GRB 980425 Radio Light Curve
  92. GRB 980425 Brightness Temperature
  93. GRB980425 BATSE observations
  94. SAX J0840.7+2248 Optical Observations
  95. GRB 980425 optical observations
  96. GRB980425: optical obs.
  97. GRB980425: Radio Observations
  98. GRB 980425 optical observations
  99. GRB 980425 optical observations
  100. GRB 980329 ROSAT observation

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