ASTROSAT CZTI

Data Quality Report

Orbit 20220227_A09_038T36_9000004976_level2

Creation date: 2026-01-01T13:40:02.777073
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/AS1A09_038T36_9000004976cztM0_level2.fits modeM0/AS1A09_038T36_9000004976cztM0_level2_quad_clean.evt
Size (bytes)206,838,720179,706,240
Size197.3 MB 171.4 MB
Events in quadrant A1,235,644921,401
Events in quadrant B1,250,2201,120,286
Events in quadrant C1,295,5021,082,066
Events in quadrant D1,089,484924,765

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0750
B0750
C0750
D0750

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0669000
B0460830
C0438310
D0717590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04120
B04120
C04120
D04120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20219250912.409120%
B202193541.750828%
C202191480.731985%
D202198654.278154%

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 27719 20217 0 0 0.00% 0.00%
B 27719 20218 0 0 0.00% 0.00%
C 27719 20219 0 0 0.00% 0.00%
D 27719 20217 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 9 19 1024 9.02 323 306 79.6
A 7 110 998 8.69 323 306 79.6
A 0 29 914 7.64 323 306 79.6
B 2 9 1056 11.18 332 320 65.8
B 3 80 1012 10.51 332 320 65.8
B 5 128 875 8.43 332 320 65.8
C 1 81 1120 9.17 342 326 86.6
C 1 80 1104 8.98 342 326 86.6
C 3 202 1071 8.6 342 326 86.6
D 6 38 814 6.39 312 286 82.6
D 11 66 805 6.28 312 286 82.6
D 10 189 803 6.26 312 286 82.6

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