ASTROSAT CZTI

Data Quality Report

Orbit 55421

Creation date: 2025-12-26T05:51:44.865257
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/AS1A14_099T01_9000006536_55421cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55421cztM0_level2_quad_clean.evt
Size (bytes)780,816,960103,072,320
Size744.6 MB 98.3 MB
Events in quadrant A3,795,239769,277
Events in quadrant B4,788,362799,162
Events in quadrant C3,974,940723,282
Events in quadrant D15,715,765266,329

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01755225
B02031630
C01816019
D052371169

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8094680.840128%
B80902883.559951%
C81001211.493827%
D8084535166.192479%

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 8588 8103 20 20 0.23% 0.25%
B 8588 8098 85 85 0.99% 1.05%
C 8589 8107 52 52 0.61% 0.64%
D 8588 8089 4133 4133 48.13% 51.09%

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 8 134103 613.61 868 845 217.2
A 4 159 119489 546.32 868 845 217.2
A 4 3 44239 199.82 868 845 217.2
B 5 236 942327 5154.88 854 820 182.6
B 10 247 143299 780.09 854 820 182.6
B 2 249 75762 410.32 854 820 182.6
C 15 148 177392 759.49 853 844 232.5
C 13 3 95586 407.57 853 844 232.5
C 14 254 63000 267.39 853 844 232.5
D 11 129 10309568 64117.85 559 534 160.8
D 8 48 1451338 9023.39 559 534 160.8
D 2 62 669273 4159.28 559 534 160.8

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