ASTROSAT CZTI

Data Quality Report

Orbit 00177

Creation date: 2024-06-27T13:57:27.578257
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/AS1P01_134T04_9000000012_00177cztM0_level2.evt modeM0/AS1P01_134T04_9000000012_00177cztM0_level2_quad_clean.evt
Size (bytes)933,932,16062,418,240
Size890.7 MB 59.5 MB
Events in quadrant A6,723,672370,544
Events in quadrant B6,802,196378,772
Events in quadrant C6,173,734376,563
Events in quadrant D8,202,442362,283

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240822
B0242761
C0224551
D0284451

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5761100.173581%
B5761310.538101%
C5761230.399236%
D57612404.165943%

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 7352 5763 157 157 2.14% 2.72%
B 7352 5763 167 167 2.27% 2.90%
C 7352 5763 95 95 1.29% 1.65%
D 7352 5763 813 813 11.06% 14.11%

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 14 10 71406 189.57 1673 1660 367.9
A 7 128 48662 127.75 1673 1660 367.9
A 0 6 38732 100.76 1673 1660 367.9
B 10 199 212548 533.55 1692 1706 395.2
B 8 5 60923 149.85 1692 1706 395.2
B 5 216 14867 33.3 1692 1706 395.2
C 0 202 95065 218.85 1525 1582 427.2
C 9 201 29497 65.35 1525 1582 427.2
C 10 33 10081 19.9 1525 1582 427.2
D 2 121 1014603 2216.49 1481 1529 457.1
D 13 89 733908 1602.36 1481 1529 457.1
D 2 239 303757 661.24 1481 1529 457.1

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