ASTROSAT CZTI

Data Quality Report

Orbit 20180917_A04_230T01_9000002374_level2

Creation date: 2025-11-24T18:38:27.047159
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/AS1A04_230T01_9000002374cztM0_level2.fits modeM0/AS1A04_230T01_9000002374cztM0_level2_quad_clean.evt
Size (bytes)870,376,320769,671,360
Size830.1 MB 734.0 MB
Events in quadrant A5,386,0204,554,946
Events in quadrant B5,105,3384,477,998
Events in quadrant C5,185,0064,258,873
Events in quadrant D4,521,2683,855,807

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018300
B018300
C018300
D018300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01991250
B02016440
C01878410
D02193860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8987512011.336300%
B8987515991.779138%
C8987511671.298470%
D8987530743.420306%

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 105890 89854 0 0 0.00% 0.00%
B 105889 89858 0 0 0.00% 0.00%
C 105889 89860 0 0 0.00% 0.00%
D 105890 89729 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 5228 11.54 1400 1316 339.1
A 7 110 4277 8.73 1400 1316 339.1
A 0 30 4128 8.29 1400 1316 339.1
B 2 9 4242 11.09 1355 1295 265.8
B 2 8 3515 8.35 1355 1295 265.8
B 3 17 3431 8.04 1355 1295 265.8
C 12 241 3733 7.0 1371 1277 350.7
C 7 111 3438 6.16 1371 1277 350.7
C 3 158 3437 6.16 1371 1277 350.7
D 6 231 3311 6.23 1293 1179 342.3
D 3 14 3240 6.02 1293 1179 342.3
D 10 189 3193 5.88 1293 1179 342.3

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