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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"

37157 results found.

  1. IPN triangulation of GRB030518A (annulus)
  2. IPN triangulation of GRB030514 (annulus)
  3. IPN triangulation of GRB030513 (annulus)
  4. IPN triangulation of GRB030509B (annulus)
  5. GRB 030329: Optical limit (contemporaneous imaging)
  6. GRB 030501: final TAROT limits
  7. IPN triangulation of GRB030509 (small errror box)
  8. IPN triangulation of GRB030509 - correction
  9. IPN triangulation of GRB030509 (single error box)
  10. GRB030329: RTT150 optical observations
  11. GRB 030329: Optical limit (contemporaneous photography)
  12. GRB030418, BVRcIc field photometry
  13. GRB 030429: Redshift of neighbor galaxy
  14. GRB030429, BVRcIc field photometry
  15. GRB 030329: High-Resolution Spectroscopy of the Host
  16. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  17. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  18. GRB030429: RTT150 optical observations, a possible host galaxy
  19. IPN triangulation of GRB030506 (annulus)
  20. IPN triangulation of GRB030505B (large error box)
  21. IPN triangulation of GRB030505A (annulus)
  22. GRB030329: RTT150 optical observations and upper limit for a host
  23. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  24. GRB030501, optical observation
  25. GRB030501C triangulation (annulus)
  26. GRB030329: RTT150 optical observations and upper limit for a host
  27. GRB 030429: Radio Observations
  28. GRB 030429: redshift from VLT spectroscopy
  29. GRB 030429: IR photometry with IRSF/SIRIUS
  30. GRB030501B triangulation (single error box)
  31. GRB 030329 Optical Observations
  32. GRB 030329, BVRI photometry
  33. GRB 030501: TAROT possible candidate counterpart
  34. IPN triangulation of GRB030501 (IBIS event; annulus)
  35. IPN triangulation of GRB030501B (annulus)
  36. GRB 030429: confirmation of afterglow candidate
  37. GRB030429, possible optical counterpart
  38. GRB030501 localized by INTEGRAL
  39. GRB030425: CrAO optical observation
  40. IPN triangulation of GRB030429 (annulus)
  41. IPN triangulation of GRB030428 (two large error boxes)
  42. GRB 030329 Oprical observations in Rozhen observatory
  43. GRB 030429: ROTSE-III observations
  44. GRB 030324: Radio Observations
  45. GRB030329 observed as a sudden ionospheric disturbance (SID)
  46. IPN triangulation of GRB030426 (annulus)
  47. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  48. IPN triangulation of GRB030425 (single error box)
  49. GRB 030329, the review of the sky area in plate archive (1950-1998)
  50. GRB 030329: Spectral Evolution of SN 2003dh
  51. Optical Observations of GRB 030418 with Magellan
  52. GRB 030329: optical spectropolarimetry at VLT
  53. IPN triangulation of GRB030422C (annulus)
  54. IPN triangulation of GRB030422B (annulus)
  55. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  56. GRB030329: optical polarization
  57. IPN triangulation of GRB030422 (two large error boxes)
  58. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  59. IPN triangulation of GRB030421 (annulus)
  60. MASTER:optical observations GRB030418
  61. MASTER:optical observations probable GRB030414
  62. GRB030329: 444 AAVSO Measurements
  63. IPN triangulation of GRB030419 (annulus)
  64. MASTER:optical observations GRB030416
  65. ROTSE-III prompt optical detections of GRB 030418
  66. GRB030418: Upper limits from recent and historical observations.
  67. GRB030418: Kiso near infrared observations
  68. GRB 030418: Optical afterglow
  69. GRB 030418: Finder for afterglow candidate
  70. GRB 030418: Optical afterglow candidate
  71. GRB 030329 OT position
  72. OT GRB 030329: early UBVRcIc spectral evolution
  73. GRB030329, UBVRI polarimetry, R-polarization
  74. GRB 030329: SARA Optical Observations
  75. OT GRB 030329: early spectrum
  76. GRB030329: VR Photometry at TNG
  77. GRB030324: Candidate Optical Afterglow (Erratum)
  78. GRB030324: Candidate Optical Afterglow
  79. IPN triangulation of GRB030414 (small error box)
  80. GRB 030413: Optical Observations
  81. GRB 030329 Rc observations
  82. IPN triangulation of GRB030413 (small error box)
  83. IPN triangulation of GRB030410 (annulus)
  84. Superluminal motion in GRB 030329 (Correction)
  85. Superluminal motion in GRB 030329
  86. GRB 030329 and SN 2003dh
  87. GRB030329, optical position
  88. GRB 030329 VLBA Observations
  89. IPN triangulation of GRB030406 (small error box)
  90. IPN triangulation of GRB050403 (small error box)
  91. IPN triangulation of GRB030403 (annulus)
  92. GRB 030329: BVRI photometry at Asiago
  93. GRB 030329, light curve flattens
  94. GRB 030329: VLT V-band photometry
  95. If the SN/GRB connection confirmed
  96. GRB 030329: Supernova Confirmed
  97. GRB030329: RTT150 optical observations
  98. GRB030329: Near Infrared Observations at Gunma
  99. GRB030329: HET spectroscopic monitoring
  100. Kiso observation of the GRB030329 at April 6

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