ASTROSAT CZTI

Data Quality Report

Orbit 58876

Creation date: 2026-08-15T15:38:34.981190
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_58876cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58876cztM0_level2_quad_clean.evt
Size (bytes)802,313,28073,825,920
Size765.1 MB 70.4 MB
Events in quadrant A4,360,341608,312
Events in quadrant B3,487,308685,383
Events in quadrant C15,751,94335,529
Events in quadrant D5,627,084481,151

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169471
B0142151
C0510871
D0207391

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60844106.738988%
B60841472.416174%
C6084581195.512821%
D6084108517.833662%

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 7303 6083 288 288 3.94% 4.73%
B 7304 6084 35 35 0.48% 0.58%
C 7303 6083 5789 5789 79.27% 95.17%
D 7304 6084 1044 1044 14.29% 17.16%

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 15 233 757896 4363.45 699 679 173.5
A 14 238 486195 2797.78 699 679 173.5
A 3 14 234931 1349.87 699 679 173.5
B 5 172 191005 1283.01 701 675 148.3
B 2 249 181151 1216.58 701 675 148.3
B 4 236 84713 566.5 701 675 148.3
C 9 38 14662292 219246.24 240 238 66.9
C 12 252 48706 724.76 240 238 66.9
C 7 87 41342 614.64 240 238 66.9
D 12 110 2775721 14754.34 658 627 188.1
D 6 239 111562 589.81 658 627 188.1
D 7 222 39801 208.28 658 627 188.1

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

TCT plots

Parameter TCT0 TCT_healed
Tct