ASTROSAT CZTI

Data Quality Report

Orbit 51660

Creation date: 2025-04-22T12:00:58.003296
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/AS1A13_031T01_9000006462_51660cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51660cztM0_level2_quad_clean.evt
Size (bytes)666,792,000122,806,080
Size635.9 MB 117.1 MB
Events in quadrant A6,392,178791,064
Events in quadrant B5,250,119871,985
Events in quadrant C7,023,380722,245
Events in quadrant D5,347,361733,343

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0249520
B0214170
C0269381
D0218081

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01720
C01720
D01720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A86365115.917091%
B86372512.906102%
C863696511.174155%
D86352012.327736%

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 8636 8636 355 355 4.11% 4.11%
B 8637 8637 160 160 1.85% 1.85%
C 8636 8636 690 690 7.99% 7.99%
D 8636 8636 174 174 2.01% 2.01%

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 12 250 1158660 5071.36 925 903 228.3
A 7 64 901994 3947.08 925 903 228.3
A 7 206 194596 848.44 925 903 228.3
B 12 32 252020 1272.54 924 892 197.3
B 1 223 232506 1173.66 924 892 197.3
B 15 52 114109 573.7 924 892 197.3
C 15 189 1792885 7517.29 874 868 238.4
C 14 245 552533 2314.17 874 868 238.4
C 12 254 316649 1324.66 874 868 238.4
D 7 60 414035 1651.88 904 873 250.1
D 2 249 276319 1101.27 904 873 250.1
D 8 176 252229 1004.95 904 873 250.1

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