ASTROSAT CZTI

Data Quality Report

Orbit 20181111_A05_074T02_9000002504_level2

Creation date: 2025-11-25T19:16:57.401358
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A05_074T02_9000002504cztM0_level2.fits modeM0/AS1A05_074T02_9000002504cztM0_level2_quad_clean.evt
Size (bytes)279,987,840242,072,640
Size267.0 MB 230.9 MB
Events in quadrant A1,778,6361,478,055
Events in quadrant B1,709,5441,487,602
Events in quadrant C1,747,4841,420,700
Events in quadrant D1,405,8381,107,343

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0690
B0690
C0690
D0690

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05440
B05440
C05440
D05440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0565970
B0576730
C0570170
D01039430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A267004491.681648%
B267005442.037453%
C267006402.397004%
D26700446016.704120%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 32609 26698 0 0 0.00% 0.00%
B 32609 26698 0 0 0.00% 0.00%
C 32609 26699 0 0 0.00% 0.00%
D 32609 26668 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 1596 10.34 462 435 112.3
A 7 110 1397 8.57 462 435 112.3
A 0 30 1323 7.91 462 435 112.3
B 2 9 1347 10.16 453 435 89.8
B 5 128 1138 7.83 453 435 89.8
B 5 225 1121 7.64 453 435 89.8
C 1 80 1297 7.25 461 433 119.1
C 1 81 1286 7.16 461 433 119.1
C 3 126 1207 6.5 461 433 119.1
D 3 14 1032 6.32 401 368 105.0
D 6 231 1025 6.25 401 368 105.0
D 10 189 1000 6.02 401 368 105.0

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter