ASTROSAT CZTI

Data Quality Report

Orbit 20210221_A10_102T02_9000004200_level2

Creation date: 2025-12-20T18:21:33.210514
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/AS1A10_102T02_9000004200cztM0_level2.fits modeM0/AS1A10_102T02_9000004200cztM0_level2_quad_clean.evt
Size (bytes)897,445,440904,579,200
Size855.9 MB 862.7 MB
Events in quadrant A5,647,8445,612,915
Events in quadrant B5,326,5025,585,684
Events in quadrant C5,434,0405,341,771
Events in quadrant D4,646,5704,735,123

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018240
B018240
C018240
D018240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01878700
B02079580
C02355330
D02821350

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8926211011.233448%
B8926222572.528512%
C8926242924.808317%
D8926279008.850351%

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 104932 89261 0 0 0.00% 0.00%
B 104932 89263 0 0 0.00% 0.00%
C 104932 89263 0 0 0.00% 0.00%
D 104932 89021 0 0 0.00% 0.00%

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 29 4597 9.14 1473 1398 350.0
A 7 110 4351 8.44 1473 1398 350.0
A 9 19 4280 8.23 1473 1398 350.0
B 2 9 4357 10.95 1411 1354 274.4
B 2 8 3601 8.19 1411 1354 274.4
B 5 128 3517 7.88 1411 1354 274.4
C 1 81 4169 7.86 1433 1353 358.3
C 1 80 4124 7.73 1433 1353 358.3
C 12 241 3771 6.75 1433 1353 358.3
D 15 46 3544 6.74 1327 1216 345.2
D 10 189 3358 6.2 1327 1216 345.2
D 7 3 3263 5.93 1327 1216 345.2

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