ASTROSAT CZTI

Data Quality Report

Orbit 57809

Creation date: 2026-06-04T22:44:33.372244
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/AS1A14_083T16_9000006580_57809cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57809cztM0_level2_quad_clean.evt
Size (bytes)2,003,483,520339,108,480
Size1.9 GB 323.4 MB
Events in quadrant A14,328,9162,336,432
Events in quadrant B11,475,8492,498,091
Events in quadrant C32,771,4311,616,808
Events in quadrant D13,647,0752,089,066

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0588933
B0526613
C01148553
D0585043

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A250814921.961644%
B250825022.001435%
C25082690027.509768%
D250827192.866598%

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 26325 25081 95 95 0.36% 0.38%
B 26326 25082 46 46 0.17% 0.18%
C 26326 25082 5739 5739 21.80% 22.88%
D 26326 25082 477 477 1.81% 1.90%

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 3 14 2910434 4398.73 2677 2605 661.1
A 3 128 768941 1159.25 2677 2605 661.1
A 3 245 155840 231.8 2677 2605 661.1
B 7 252 200206 348.71 2653 2549 566.8
B 10 247 172546 299.91 2653 2549 566.8
B 0 245 72054 122.62 2653 2549 566.8
C 9 38 17190492 27038.57 2343 2319 635.7
C 15 224 5519807 8679.51 2343 2319 635.7
C 14 254 322931 504.35 2343 2319 635.7
D 8 240 1730192 2369.61 2592 2472 729.1
D 3 12 476928 650.73 2592 2472 729.1
D 5 173 249798 339.21 2592 2472 729.1

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