ASTROSAT CZTI

Data Quality Report

Orbit 58918

Creation date: 2026-08-18T11:15:06.017277
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_004T07_9000006598_58918cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58918cztM0_level2_quad_clean.evt
Size (bytes)649,497,60087,503,040
Size619.4 MB 83.4 MB
Events in quadrant A9,705,432408,860
Events in quadrant B3,431,296668,706
Events in quadrant C3,437,845601,894
Events in quadrant D6,980,775531,381

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0331321
B0144261
C0146921
D0252031

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6281258041.076262%
B62822153.422477%
C62821722.737982%
D62816109.711829%

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 7451 6282 2015 2015 27.04% 32.08%
B 7452 6283 111 111 1.49% 1.77%
C 7452 6283 116 116 1.56% 1.85%
D 7451 6282 507 507 6.80% 8.07%

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 14 238 6357060 43958.42 588 573 144.6
A 15 233 955226 6601.92 588 573 144.6
A 13 248 37997 258.81 588 573 144.6
B 4 171 229140 1526.33 700 675 149.7
B 4 236 111968 743.53 700 675 149.7
B 10 247 101718 675.05 700 675 149.7
C 12 252 329873 1756.56 683 678 187.4
C 13 3 264799 1409.33 683 678 187.4
C 6 223 113847 603.86 683 678 187.4
D 12 110 3512928 18613.43 665 635 188.7
D 8 160 276933 1464.24 665 635 188.7
D 7 222 152932 807.1 665 635 188.7

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

TCT plots

Parameter TCT0 TCT_healed
Tct