ASTROSAT CZTI

Data Quality Report

Orbit 20181103_T03_015T01_9000002486_level2

Creation date: 2025-11-25T15:31:55.666800
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/AS1T03_015T01_9000002486cztM0_level2.fits modeM0/AS1T03_015T01_9000002486cztM0_level2_quad_clean.evt
Size (bytes)273,625,920342,302,400
Size261.0 MB 326.4 MB
Events in quadrant A1,689,4122,211,328
Events in quadrant B1,619,9942,264,620
Events in quadrant C1,642,9782,140,562
Events in quadrant D1,318,3901,736,590

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0719270
B0639460
C0676960
D01079030

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460
B0460
C0460
D0460

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05980
B05980
C05980
D05980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2928610913.725330%
B292853171.082465%
C292855011.710773%
D29283470016.050268%

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 33948 29285 0 0 0.00% 0.00%
B 33948 29287 0 0 0.00% 0.00%
C 33948 29287 0 0 0.00% 0.00%
D 33948 29172 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 1629 11.16 439 413 109.0
A 7 110 1346 8.56 439 413 109.0
A 0 30 1318 8.31 439 413 109.0
B 2 9 1311 10.65 428 410 84.6
B 2 8 1110 8.27 428 410 84.6
B 14 254 1063 7.72 428 410 84.6
C 1 81 1287 7.82 433 406 112.7
C 1 80 1272 7.69 433 406 112.7
C 12 241 1198 7.03 433 406 112.7
D 3 14 949 6.01 376 343 100.9
D 6 67 944 5.96 376 343 100.9
D 6 231 914 5.66 376 343 100.9

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