ASTROSAT CZTI

Data Quality Report

Orbit 20190421_A05_088T02_9000002850_level2

Creation date: 2025-11-29T12:50:05.206755
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/AS1A05_088T02_9000002850cztM0_level2.fits modeM0/AS1A05_088T02_9000002850cztM0_level2_quad_clean.evt
Size (bytes)340,827,840214,058,880
Size325.0 MB 204.1 MB
Events in quadrant A2,132,0681,104,673
Events in quadrant B2,053,8301,122,631
Events in quadrant C2,121,2121,095,763
Events in quadrant D1,870,1741,012,116

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680930
B0682670
C0707030
D0698050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06380
B06380
C06380
D06380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850
B0850
C0850
D0850

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A312174271.367844%
B312175081.627318%
C312178372.681231%
D312174761.524810%

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 39632 31212 0 0 0.00% 0.00%
B 39632 31212 0 0 0.00% 0.00%
C 39632 31211 0 0 0.00% 0.00%
D 39632 31212 0 0 0.00% 0.00%

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 0 29 2072 11.45 555 523 135.2
A 7 110 1695 8.67 555 523 135.2
A 0 30 1548 7.58 555 523 135.2
B 2 9 1667 10.77 542 519 106.6
B 3 17 1410 8.36 542 519 106.6
B 2 8 1384 8.11 542 519 106.6
C 1 80 1550 7.16 559 528 142.8
C 1 81 1484 6.69 559 528 142.8
C 9 209 1460 6.53 559 528 142.8
D 10 190 1411 6.67 533 489 138.2
D 7 3 1342 6.17 533 489 138.2
D 10 189 1336 6.13 533 489 138.2

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