ASTROSAT CZTI

Data Quality Report

Orbit 51754

Creation date: 2025-04-23T08:41:51.712386
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_51754cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51754cztM0_level2_quad_clean.evt
Size (bytes)1,129,749,120164,577,600
Size1.1 GB 157.0 MB
Events in quadrant A7,120,9961,133,429
Events in quadrant B12,133,6281,066,558
Events in quadrant C6,977,9051,099,092
Events in quadrant D14,641,056838,028

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02460
B02460
C02460
D02460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0295782
B0446342
C0292572
D05197810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A122372592.116532%
B12237208317.022146%
C122372872.345346%
D12236270522.106898%

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 14209 12239 129 129 0.91% 1.05%
B 14209 12239 1299 1299 9.14% 10.61%
C 14209 12239 221 221 1.56% 1.81%
D 14208 12238 2297 2297 16.17% 18.77%

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 12 3 566535 1767.44 1295 1264 319.8
A 4 3 233829 727.16 1295 1264 319.8
A 5 240 145583 451.24 1295 1264 319.8
B 4 206 5417788 20926.61 1213 1171 258.8
B 7 0 512078 1973.84 1213 1171 258.8
B 8 128 438253 1688.63 1213 1171 258.8
C 13 3 352155 1005.99 1274 1268 348.8
C 1 243 331225 945.98 1274 1268 348.8
C 9 38 222355 633.85 1274 1268 348.8
D 11 129 8493699 26604.5 1141 1099 319.2
D 8 176 582429 1821.11 1141 1099 319.2
D 3 12 295252 921.48 1141 1099 319.2

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