ASTROSAT CZTI

Data Quality Report

Orbit 20181212_A05_025T16_9000002560_level2

Creation date: 2025-11-26T05:41:49.379685
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_025T16_9000002560cztM0_level2.fits modeM0/AS1A05_025T16_9000002560cztM0_level2_quad_clean.evt
Size (bytes)200,064,960198,086,400
Size190.8 MB 188.9 MB
Events in quadrant A1,222,6261,204,186
Events in quadrant B1,180,0761,199,076
Events in quadrant C1,176,3261,108,792
Events in quadrant D1,025,8781,032,305

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0433070
B0437920
C0447610
D0492400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04320
B04320
C04320
D04320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21116720.340974%
B211161700.805077%
C211163461.638568%
D211163741.771169%

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 23601 21116 0 0 0.00% 0.00%
B 23601 21117 0 0 0.00% 0.00%
C 23601 21116 0 0 0.00% 0.00%
D 23601 21108 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 1250 11.72 318 299 81.2
A 7 110 1024 8.93 318 299 81.2
A 9 19 965 8.2 318 299 81.2
B 2 9 951 10.46 311 296 62.6
B 5 232 804 8.11 311 296 62.6
B 3 80 772 7.6 311 296 62.6
C 12 241 837 6.7 311 288 82.0
C 9 233 778 5.98 311 288 82.0
C 3 187 770 5.88 311 288 82.0
D 6 231 783 6.43 292 263 80.9
D 6 67 737 5.86 292 263 80.9
D 7 5 728 5.75 292 263 80.9

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