ASTROSAT CZTI

Data Quality Report

Orbit 52438

Creation date: 2025-06-27T20:08:34.638946
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_037T01_9000006476_52438cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52438cztM0_level2_quad_clean.evt
Size (bytes)170,372,16018,034,560
Size162.5 MB 17.2 MB
Events in quadrant A723,090145,715
Events in quadrant B914,242154,382
Events in quadrant C2,125,21671,757
Events in quadrant D2,430,04467,355

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124
B0101
C0112
D0124

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A057802636
B068573198
C0124285175
D0162248053

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06229
B06131
C05925
D05621

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A149190.603622%
B1490241.610738%
C138166047.791455%
D137968649.746193%

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 4302 1566 3 3 0.07% 0.19%
B 5482 1557 1 1 0.02% 0.06%
C 4328 1389 556 556 12.85% 40.03%
D 4167 1414 605 605 14.52% 42.79%

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 13 248 7414 165.0 173 169 43.9
A 4 3 6234 138.13 173 169 43.9
A 3 95 5782 127.83 173 169 43.9
B 7 0 126208 3259.67 170 164 38.7
B 5 172 38868 1000.94 170 164 38.7
B 4 81 22867 587.13 170 164 38.7
C 15 164 1390794 45894.42 106 104 30.3
C 4 5 173454 5720.76 106 104 30.3
C 15 165 44072 1451.0 106 104 30.3
D 15 93 1105560 32246.83 117 111 34.3
D 12 17 664226 19372.76 117 111 34.3
D 11 245 39386 1145.68 117 111 34.3

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