ASTROSAT CZTI

Data Quality Report

Orbit 26667

Creation date: 2024-06-27T19:31:35.606956
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/AS1A09_145T01_9000003848_26667cztM0_level2.evt modeM0/AS1A09_145T01_9000003848_26667cztM0_level2_quad_clean.evt
Size (bytes)562,227,84087,912,000
Size536.2 MB 83.8 MB
Events in quadrant A3,977,485550,996
Events in quadrant B3,944,065554,631
Events in quadrant C3,960,890531,009
Events in quadrant D4,641,787509,607

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163890
B0162140
C0161750
D0186110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74131061.429920%
B74131532.063942%
C74131802.428167%
D74122963.993524%

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 7758 7414 18 18 0.23% 0.24%
B 7758 7414 26 26 0.34% 0.35%
C 7758 7414 14 14 0.18% 0.19%
D 7757 7413 191 191 2.46% 2.58%

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 13 291085 1494.92 951 932 194.1
A 13 254 11677 55.36 951 932 194.1
A 3 137 8739 40.22 951 932 194.1
B 5 172 150463 834.54 940 917 179.2
B 0 189 31874 172.75 940 917 179.2
B 0 219 23023 123.36 940 917 179.2
C 2 16 207000 967.59 903 907 213.0
C 14 238 144657 674.89 903 907 213.0
C 3 233 62341 288.43 903 907 213.0
D 1 52 524200 2353.3 909 883 222.4
D 12 233 240815 1078.95 909 883 222.4
D 2 250 179156 801.67 909 883 222.4

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