ASTROSAT CZTI

Data Quality Report

Orbit 52841

Creation date: 2025-07-16T09:54:20.532686
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/AS1C09_011T07_9000006480_52841cztM0_level2.fits modeM0/AS1C09_011T07_9000006480_52841cztM0_level2_quad_clean.evt
Size (bytes)870,644,16073,681,920
Size830.3 MB 70.3 MB
Events in quadrant A7,789,791509,457
Events in quadrant B12,076,569289,786
Events in quadrant C3,651,297555,009
Events in quadrant D8,218,355431,241

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0276491
B0402841
C0157531
D0288561

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6369131820.693986%
B6369385060.449050%
C63683104.868090%
D6368167426.287688%

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 7254 6370 1158 1158 15.96% 18.18%
B 7254 6370 3135 3135 43.22% 49.22%
C 7253 6369 204 204 2.81% 3.20%
D 7253 6369 1538 1538 21.21% 24.15%

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 9 191 3512540 22353.8 618 601 157.1
A 5 243 676128 4299.79 618 601 157.1
A 4 238 346595 2202.28 618 601 157.1
B 8 3 8723931 80818.06 502 487 107.9
B 5 172 968972 8972.5 502 487 107.9
B 5 185 138914 1282.45 502 487 107.9
C 15 224 862242 4965.96 626 620 173.5
C 12 249 119678 686.19 626 620 173.5
C 14 254 45211 257.0 626 620 173.5
D 8 176 3288263 20361.96 559 533 161.5
D 11 176 723608 4478.23 559 533 161.5
D 10 172 681068 4214.77 559 533 161.5

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