ASTROSAT CZTI

Data Quality Report

Orbit 54987

Creation date: 2025-11-27T14:01:47.558920
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_014T01_9000006528_54987cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54987cztM0_level2_quad_clean.evt
Size (bytes)402,719,04030,035,520
Size384.1 MB 28.6 MB
Events in quadrant A1,800,677229,343
Events in quadrant B1,763,452248,329
Events in quadrant C3,392,995178,106
Events in quadrant D7,687,17614,056

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08153406
B08094415
C0138881487
D0290664096

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0743
B0751
C0795
D0731

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022
B011
C111
D1-1-1

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3470551.585014%
B3447862.494923%
C337286625.682088%
D3146303396.408137%

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 3685 3627 19 19 0.52% 0.52%
B 3685 3620 18 18 0.49% 0.50%
C 3685 3495 539 539 14.63% 15.42%
D 3684 3185 2747 2747 74.57% 86.25%

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 8 151311 1462.48 410 399 103.2
A 15 32 18894 179.23 410 399 103.2
A 4 3 14819 139.74 410 399 103.2
B 0 182 61101 687.96 400 384 88.3
B 5 185 50002 562.2 400 384 88.3
B 9 251 12745 140.06 400 384 88.3
C 13 3 1958035 22911.5 310 307 85.4
C 6 223 102038 1190.57 310 307 85.4
C 14 254 32294 374.35 310 307 85.4
D 15 94 6547470 142506.83 158 151 45.9
D 2 249 146300 3181.03 158 151 45.9
D 11 129 118855 2583.67 158 151 45.9

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