ASTROSAT CZTI

Data Quality Report

Orbit 52891

Creation date: 2025-07-16T13:01:53.547202
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_011T08_9000006482_52891cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52891cztM0_level2_quad_clean.evt
Size (bytes)552,093,12086,567,040
Size526.5 MB 82.6 MB
Events in quadrant A5,934,778514,820
Events in quadrant B3,311,762639,494
Events in quadrant C3,318,630567,527
Events in quadrant D7,385,069462,579

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218381
B0141711
C0141701
D0262871

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6260118118.865815%
B62611562.491615%
C62611211.932599%
D6261122219.517649%

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 7275 6260 1054 1054 14.49% 16.84%
B 7276 6261 40 40 0.55% 0.64%
C 7276 6261 55 55 0.76% 0.88%
D 7275 6260 1068 1068 14.68% 17.06%

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 2551344 16388.52 625 609 155.6
A 12 17 258871 1659.34 625 609 155.6
A 6 129 87108 555.76 625 609 155.6
B 0 213 146567 1058.61 653 630 137.9
B 10 254 128115 924.76 653 630 137.9
B 4 81 118884 857.8 653 630 137.9
C 15 224 149620 843.03 644 638 176.7
C 3 233 120304 677.14 644 638 176.7
C 14 254 81281 456.33 644 638 176.7
D 15 125 1297083 7474.19 595 567 173.5
D 8 176 1235244 7117.7 595 567 173.5
D 9 49 919571 5297.9 595 567 173.5

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