ASTROSAT CZTI

Data Quality Report

Orbit 20170130_C02_016T01_9000000992_level2

Creation date: 2025-11-09T07:43:43.129648
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/AS1C02_016T01_9000000992cztM0_level2.fits modeM0/AS1C02_016T01_9000000992cztM0_level2_quad_clean.evt
Size (bytes)66,237,12049,550,400
Size63.2 MB 47.3 MB
Events in quadrant A390,086256,457
Events in quadrant B377,496255,802
Events in quadrant C385,500239,965
Events in quadrant D330,256224,471

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01520
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1140005276940328140003048947758
B1140005276940328140003048947758
C1140005276940328140003048947758
D1140005276940328140003048947758

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153540
B0160120
C0151720
D0171970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7513740.984959%
B7513851.131372%
C7520440.585106%
D7492881.174586%

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 8131 7540 0 0 0.00% 0.00%
B 8130 7546 0 0 0.00% 0.00%
C 8131 7541 0 0 0.00% 0.00%
D 8100 7517 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 14 188 406 11.14 101 94 28.0
A 0 29 363 9.61 101 94 28.0
A 14 204 345 8.96 101 94 28.0
B 2 9 327 10.27 99 94 22.7
B 14 254 285 8.42 99 94 22.7
B 12 226 281 8.24 99 94 22.7
C 12 241 297 6.99 101 94 29.1
C 3 158 265 5.88 101 94 29.1
C 7 111 260 5.71 101 94 29.1
D 4 246 278 7.18 94 85 26.9
D 1 31 253 6.25 94 85 26.9
D 11 82 236 5.61 94 85 26.9

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