ASTROSAT CZTI

Data Quality Report

Orbit 58987

Creation date: 2026-08-23T04:13:53.930869
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_58987cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58987cztM0_level2_quad_clean.evt
Size (bytes)903,352,32065,540,160
Size861.5 MB 62.5 MB
Events in quadrant A3,945,665607,634
Events in quadrant B3,465,471642,728
Events in quadrant C14,035,50535,786
Events in quadrant D11,498,756253,689

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163651
B0147881
C0460061
D0384471

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63651161.822467%
B63651612.529458%
C6366601594.486334%
D6366364457.241596%

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 7225 6366 80 80 1.11% 1.26%
B 7225 6366 105 105 1.45% 1.65%
C 7225 6365 5637 5637 78.02% 88.56%
D 7226 6366 3433 3433 47.51% 53.93%

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 861607 5088.5 683 663 169.2
A 3 14 269005 1586.0 683 663 169.2
A 15 233 131299 772.11 683 663 169.2
B 4 236 339059 2327.11 675 651 145.4
B 6 255 140683 962.95 675 651 145.4
B 10 247 90277 616.33 675 651 145.4
C 15 219 13603811 452821.74 103 102 30.0
C 12 252 12965 428.17 103 102 30.0
C 14 254 4699 153.02 103 102 30.0
D 12 110 9358958 69225.77 469 449 135.2
D 1 50 59771 438.81 469 449 135.2
D 5 32 59220 434.73 469 449 135.2

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