ASTROSAT CZTI

Data Quality Report

Orbit 52492

Creation date: 2025-06-25T19:19:26.590281
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_037T01_9000006476_52492cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52492cztM0_level2_quad_clean.evt
Size (bytes)366,765,12030,551,040
Size349.8 MB 29.1 MB
Events in quadrant A1,330,204276,167
Events in quadrant B2,134,093262,079
Events in quadrant C4,051,532144,629
Events in quadrant D5,861,33058,595

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06020369
B091521046
C0148741087
D0209531806

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0562
B0562
C0582
D0582

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2579682.636681%
B255226410.344828%
C2536112144.203470%
D2518198278.713264%

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 4899 2611 5 5 0.10% 0.19%
B 4899 2572 160 160 3.27% 6.22%
C 4899 2570 903 903 18.43% 35.14%
D 4900 2517 1927 1927 39.33% 76.56%

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 3 46 59674 759.87 304 295 78.1
A 3 45 29567 374.59 304 295 78.1
A 12 17 20522 258.84 304 295 78.1
B 10 44 625743 9949.53 284 275 62.9
B 7 0 206438 3279.51 284 275 62.9
B 4 170 40184 634.85 284 275 62.9
C 15 224 2838891 46177.97 220 218 61.5
C 2 12 148868 2418.16 220 218 61.5
C 13 3 111027 1802.58 220 218 61.5
D 15 93 3559085 71189.44 168 160 50.0
D 6 42 1284256 25685.87 168 160 50.0
D 2 62 147917 2955.59 168 160 50.0

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