ASTROSAT CZTI

Data Quality Report

Orbit 51656

Creation date: 2025-04-22T09:40:06.025869
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/AS1A13_037T05_9000006460_51656cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51656cztM0_level2_quad_clean.evt
Size (bytes)489,415,68095,489,280
Size466.7 MB 91.1 MB
Events in quadrant A4,293,798623,589
Events in quadrant B4,640,486664,036
Events in quadrant C4,799,306584,262
Events in quadrant D3,874,643564,092

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172761
B0181171
C0187701
D0160561

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65383264.986234%
B65394857.417036%
C65396009.175715%
D65393204.893715%

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 7543 6538 149 149 1.98% 2.28%
B 7544 6539 243 243 3.22% 3.72%
C 7544 6540 405 405 5.37% 6.19%
D 7544 6539 195 195 2.58% 2.98%

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 12 3 541819 3055.93 725 707 177.1
A 7 64 434184 2448.06 725 707 177.1
A 13 248 177557 998.76 725 707 177.1
B 10 44 877314 5744.76 714 689 152.6
B 1 223 328947 2151.16 714 689 152.6
B 0 171 118301 770.74 714 689 152.6
C 15 189 882825 4681.66 695 691 188.4
C 12 254 575133 3048.68 695 691 188.4
C 13 3 178603 944.21 695 691 188.4
D 8 176 501606 2584.57 707 681 193.8
D 3 12 295729 1522.33 707 681 193.8
D 2 249 100006 512.48 707 681 193.8

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