ASTROSAT CZTI

Data Quality Report

Orbit 51740

Creation date: 2025-04-22T10:09:01.327507
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_090T01_9000006464_51740cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51740cztM0_level2_quad_clean.evt
Size (bytes)795,173,76084,222,720
Size758.3 MB 80.3 MB
Events in quadrant A6,625,735607,611
Events in quadrant B4,819,138642,519
Events in quadrant C8,673,540392,674
Events in quadrant D8,808,327449,124

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0242061
B0187971
C0302541
D0307351

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65684156.318514%
B65695278.022530%
C6569247837.722637%
D6569173626.427158%

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 7618 6568 346 346 4.54% 5.27%
B 7619 6569 327 327 4.29% 4.98%
C 7619 6569 2308 2308 30.29% 35.13%
D 7619 6569 1747 1747 22.93% 26.59%

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 3 14 2542669 14750.37 698 680 172.3
A 4 175 380172 2202.07 698 680 172.3
A 12 3 334434 1936.67 698 680 172.3
B 10 44 1013299 6884.33 684 659 147.1
B 4 206 310348 2105.39 684 659 147.1
B 10 254 253172 1716.68 684 659 147.1
C 9 38 5438630 36760.48 538 534 147.9
C 15 178 137853 928.25 538 534 147.9
C 13 3 137727 927.4 538 534 147.9
D 11 129 5294217 30636.27 616 595 172.8
D 8 176 824109 4766.0 616 595 172.8
D 2 120 72694 417.27 616 595 172.8

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